WAGO 2-Channel Analog Input for Resistor Bridges Manual

Manual

WAGO I/O System 750

750-1491

2AI Resistor Bridge (Strain Gauge)

2-Channel Analog Input for Resistor Bridges

(Strain Gauge)

Version 1.0.0

2 WAGO I/O System 750

750-1491 2AI Resistor Bridge (Strain Gauge)

© 2020 WAGO Kontakttechnik GmbH & Co. KG

All rights reserved.

WAGO Kontakttechnik GmbH & Co. KG

Hansastraße 27

D-32423 Minden

Phone: +49 (0) 571/8 87 – 0

Fax: +49 (0) 571/8 87 – 1 69

E-Mail: [email protected]

Web: www.wago.com

Technical Support

Phone: +49 (0) 571/8 87 – 4 45 55

Fax: +49 (0) 571/8 87 – 84 45 55


Every conceivable measure has been taken to ensure the accuracy and completeness of this documentation. However, as errors can never be fully excluded, we always appreciate any information or suggestions for improving the documentation.


We wish to point out that the software and hardware terms as well as the trademarks of companies used and/or mentioned in the present manual are generally protected by trademark or patent.

WAGO is a registered trademark of WAGO Verwaltungsgesellschaft mbH.

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Table of Contents 3

Table of Contents

1 Notes about this Documentation ............................................................. 6

1.1

1.2

1.3

1.4

1.5

Validity of this Documentation................................................................. 6

Copyright ................................................................................................ 7

Symbols ................................................................................................. 8

Number Notation .................................................................................. 10

Font Conventions ................................................................................. 10

2 Important Notes ...................................................................................... 11

2.1

2.1.1

2.1.2

2.1.3

2.1.4

2.1.4.1

2.1.4.1.1

2.1.4.1.2

2.2

Legal Bases .......................................................................................... 11

Subject to Changes .......................................................................... 11

Personnel Qualifications .................................................................. 11

Use of the 750 Series in Compliance with Underlying Provisions ..... 11

Technical Condition of Specified Devices......................................... 12

Disposal ...................................................................................... 12

Electrical and Electronic Equipment ........................................ 12

Packaging ............................................................................... 13

Safety Advice (Precautions) ................................................................. 14

3 Device Description .................................................................................. 18

3.1

3.2

3.2.1

3.2.2

3.2.3

3.3

3.4

3.5

3.5.1

3.5.2

3.6

3.7

View ..................................................................................................... 21

Connectors ........................................................................................... 22

Data Contacts/Local Bus .................................................................. 22

Power Jumper Contacts/Field Supply .............................................. 23

Push-in CAGE CLAMP ® Connectors ................................................ 25

Display Elements .................................................................................. 26

Schematic Diagram .............................................................................. 27

Technical Data ..................................................................................... 28

Connection Type .............................................................................. 29

Climatic Environmental Conditions ................................................... 29

Approvals ............................................................................................. 30

Standards and Guidelines .................................................................... 31

4 Process Image ......................................................................................... 32

4.1

4.2

4.2.1

4.2.2

4.2.3

4.2.4

4.2.5

4.2.6

4.2.7

4.2.8

4.2.9

4.2.10

4.2.11

4.2.12

4.2.13

Overview .............................................................................................. 32

Control and Status Byte ........................................................................ 34

Process Data ................................................................................... 36

Overview of Signal Voltages ............................................................ 36

Conversion of the Process Values ................................................... 37

Resistor Bridge (Strain Gauge) ........................................................ 38

SG Bridge Voltage U

SG Bridge Voltage U

SG Bridge Voltage U

SG Bridge Voltage U

SG Bridge Voltage U

SG Bridge Voltage U

d

(±15 mV) ....................................................... 39 d

d d

d

(±30 mV) ....................................................... 39

(±60 mV) ....................................................... 40

(±120 mV) ..................................................... 40

(±240 mV) ..................................................... 41 d

(±360 mV) ..................................................... 41

SG Reference Voltage U ref

(+5 V internal) ........................................ 42

SG Reference Voltage U

SG Reference Voltage U

ref

ref

(±5 V external) ....................................... 42

(±10 V external) ..................................... 43

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4.2.14

SG Reference Voltage U ref

(±15 V external) ..................................... 43

5 Mounting .................................................................................................. 44

5.1

5.2

5.2.1

5.2.2

Mounting Sequence .............................................................................. 45

Inserting and Removing Devices .......................................................... 46

Inserting the I/O Module ................................................................... 46

Removing the I/O Module ................................................................ 47

6 Connect Devices ..................................................................................... 48

6.1

6.2

6.2.1

6.2.2

6.2.3

6.2.4

6.2.4.1

6.2.4.2

Connecting a Conductor to the Push-in CAGE CLAMP ® ...................... 48

Connection Examples ........................................................................... 50

6-Wire Operation .............................................................................. 50

4-Wire Operation (Internal Supply) ................................................... 51

4-Wire Operation (External Supply) .................................................. 51

Calibration ........................................................................................ 52

Connection Examples with External Power Supply ...................... 52

Connection Examples with Internal Power Supply ....................... 53

7 Commissioning ....................................................................................... 54

7.1

7.1.1

7.2

7.3

7.3.1

7.3.1.1

7.3.1.2

7.3.1.3

7.3.1.4

7.3.2

7.3.2.1

7.3.2.2

7.3.2.3

7.3.2.4

7.4

7.5

7.5.1

7.5.1.1

7.5.1.2

7.5.2

7.5.2.1

7.5.2.2

7.5.2.3

7.5.2.4

7.5.2.5

Preparation ........................................................................................... 54

Filter Mode ....................................................................................... 54

Tooling ................................................................................................. 55

Configuration and Parameterization with WAGO-I/O-

Configuration and Parameterization with e!COCKPIT

CHECK .............. 56

Parameterization Dialog ................................................................... 58

Title Bar ....................................................................................... 58

Information Bar ............................................................................ 59

Buttons ........................................................................................ 59

Menu ........................................................................................... 60

Settings via the Menu....................................................................... 60

Common ...................................................................................... 61

Input Settings .............................................................................. 62

Scaling ........................................................................................ 65

Calibration ................................................................................... 68

........................... 73

Configuration and Parameterization via GSD File ................................. 73

750-1491 (2AI Resistor Bridge (Strain Gauge)) Configuration .......... 73

PROFIBUS DP Fieldbus Couplers 750-333(/0xx-000) ................. 73

PROFINET IO Fieldbus Couplers 750-375(/025-000),

750-377(/025-000) ....................................................................... 74

750-1491 (2AI Resistor Bridge (Strain Gauge)) Parameterization .... 74



750-377(/025-000) ....................................................................... 75

All PROFIBUS DP and PROFINET IO Fieldbus Couplers ........... 76



750-377(/025-000) ....................................................................... 77

8 Scaling Measured Values ....................................................................... 78

9 Calibrating Measured Values ................................................................. 79

9.1

Calibration when Operating with an External Power Supply ................. 79

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9.2

Calibration when Operating with an Internal Power Supply ................... 82

10 Diagnostics.............................................................................................. 84

10.1

Behavior of the I/O Module in the Event of Error ................................... 84

10.2

Diagnostics via LED Indicators ............................................................. 87

11 Use in Hazardous Environments ........................................................... 89

11.1

Marking Configuration Examples .......................................................... 90

11.1.1

11.1.2

(CEC) ............................................................................................... 94

11.2

Installation Regulations......................................................................... 97

11.2.1

11.2.2

Marking for Europe According to ATEX and IECEx .......................... 90

Marking for the United States of America (NEC) and Canada

Special Notes including Explosion Protection ................................... 97

Special Notes Regarding UL Hazardous Location ............................ 99

12 Service ................................................................................................... 100

12.1

Factory Setting (Default Values) ......................................................... 100

12.2

Firmware Update/Downgrade ............................................................. 100

12.3

Recalibration ...................................................................................... 102

12.4

WAGO UII (Unique Item Identifier) ..................................................... 103

13 Strain Gauge Application Example ...................................................... 103

List of Figures ................................................................................................ 104

List of Tables .................................................................................................. 106

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6 Notes about this Documentation

1

WAGO I/O System 750


Notes about this Documentation

Always retain this documentation!

This documentation is part of the product. Therefore, retain the documentation during the entire service life of the product. Pass on the documentation to any subsequent user. In addition, ensure that any supplement to this documentation is included, if necessary.

1.1 Validity of this Documentation

This documentation is only applicable to the I/O module 750-1491

(2AI Resistor Bridge (Strain Gauge)).

The I/O module 750-1491 shall only be installed and operated according to the instructions in this manual and in the manual for the used fieldbus coupler or controller.

Consider power layout of the WAGO I/O System 750!

In addition to these operating instructions, you will also need the manual for the used fieldbus coupler or controller, which can be downloaded at www.wago.com

.

There, you can obtain important information including information on electrical isolation, system power and supply specifications.

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1.2 Copyright

Notes about this Documentation 7

This Manual, including all figures and illustrations, is copyright-protected. Any further use of this Manual by third parties that violate pertinent copyright provisions is prohibited. Reproduction, translation, electronic and phototechnical filing/archiving (e.g., photocopying) as well as any amendments require the written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden, Germany.

Non-observance will involve the right to assert damage claims.

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1.3 Symbols

WAGO I/O System 750


Personal Injury!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will result in death or serious injury.

Personal Injury Caused by Electric Current!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will result in death or serious injury.


Indicates a moderate-risk, potentially hazardous situation which, if not avoided, could result in death or serious injury.


Indicates a low-risk, potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Damage to Property!

Indicates a potentially hazardous situation which, if not avoided, may result in damage to property.

Damage to Property Caused by Electrostatic Discharge (ESD)!

Indicates a potentially hazardous situation which, if not avoided, may result in damage to property.

Important Note!

Indicates a potential malfunction which, if not avoided, however, will not result in damage to property.

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Notes about this Documentation

Additional Information:

Refers to additional information which is not an integral part of this documentation (e.g., the Internet).

9

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1.4 Number Notation

WAGO I/O System 750


Table 1: Number Notation

Number Code Example

Decimal 100

Hexadecimal

Binary

0x64

'100'

'0110.0100'

1.5 Font Conventions

Note

Normal notation

C notation

In quotation marks, nibble separated with dots (.)

Table 2: Font Conventions

Font Type Indicates italic Names of paths and data files are marked in italic-type. e.g.: C:\Program Files\WAGO Software

Menu

>

Input

Menu items are marked in bold letters. e.g.: Save

A greater-than sign between two names means the selection of a menu item from a menu. e.g.: File > New

Designation of input or optional fields are marked in bold letters, e.g.: Start of measurement range

Input or selective values are marked in inverted commas. “Value” e.g.: Enter the value “4 mA” under Start of measurement range .

[Button] Pushbuttons in dialog boxes are marked with bold letters in square

[Key] brackets. e.g.: [Input]

Keys are marked with bold letters in square brackets. e.g.: [F5]

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2 Important Notes

Important Notes 11

This section includes an overall summary of the most important safety requirements and notes that are mentioned in each individual section. To protect your health and prevent damage to devices as well, it is imperative to read and carefully follow the safety guidelines.

2.1 Legal Bases

2.1.1 Subject to Changes

WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any alterations or modifications. WAGO Kontakttechnik GmbH & Co. KG owns all rights arising from the granting of patents or from the legal protection of utility patents. Third-party products are always mentioned without any reference to patent rights. Thus, the existence of such rights cannot be excluded.

2.1.2 Personnel Qualifications

All sequences implemented on WAGO I/O System 750 devices may only be carried out by electrical specialists with sufficient knowledge in automation. The specialists must be familiar with the current norms and guidelines for the devices and automated environments.

All changes to the coupler or controller should always be carried out by qualified personnel with sufficient skills in PLC programming.

2.1.3 Use of the 750 Series in Compliance with Underlying

Provisions

Fieldbus couplers, controllers and I/O modules found in the modular WAGO I/O

System 750 receive digital and analog signals from sensors and transmit them to actuators or higher-level control systems. Using controllers, the signals can also be (pre-) processed.

The devices have been developed for use in an environment that fulfills the requirements of protection type IP20 and are designed for use in dry interior spaces. Protection against finger injury and solid impurities up to 12.5 mm diameter is assured; protection against water damage is not ensured. Unless otherwise specified, operation of the devices in wet and dusty environments is prohibited.

Use without additional protective measures in environments within which dust, corrosive fumes, gases or ionized radiation can occur is considered improper use.

Operating the WAGO I/O System 750 devices in home applications without further measures is only permitted if they meet the emission limits (emissions of interference) according to EN 61000-6-3. You will find the relevant information in

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12 Important Notes WAGO I/O System 750

750-1491 2AI Resistor Bridge (Strain Gauge) the section “Device Description” > “Standards and Guidelines” in the manual for the used device.

Appropriate housing (per 2014/34/EU) is required when operating the WAGO I/O

System 750 in hazardous environments. Please observe the installation regulations! Please note that a prototype test certificate must be obtained that confirms the correct installation of the system in a housing or switch cabinet.

The implementation of safety functions such as EMERGENCY STOP or safety door monitoring must only be performed by the F I/O modules within the modular

WAGO I/O System 750. Only these safe F I/O modules ensure functional safety in accordance with the latest international standards. WAGO's interference-free output modules can be controlled by the safety function.

2.1.4 Technical Condition of Specified Devices

The devices to be supplied ex works are equipped with hardware and software configurations, which meet the individual application requirements. These modules contain no parts that can be serviced or repaired by the user. The following actions will result in the exclusion of liability on the part of WAGO

Kontakttechnik GmbH & Co. KG:

•

•

Repairs,

Changes to the hardware or software that are not described in the operating instructions,

Improper use of the components. •

Further details are given in the contractual agreements. Please send your request for modified and new hardware or software configurations directly to

WAGO Kontakttechnik GmbH & Co. KG.

2.1.4.1 Disposal

2.1.4.1.1 Electrical and Electronic Equipment

Electrical and electronic equipment may not be disposed of with household waste. This also applies to products without this symbol.

Electrical and electronic equipment contain materials and substances that can be harmful to the environment and health. Electrical and electronic equipment must be disposed of properly after use.

WEEE 2012/19/EU applies throughout Europe. Directives and laws may vary nationally.

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Important Notes 13

Environmentally friendly disposal benefits health and protects the environment from harmful substances in electrical and electronic equipment.

•

•

•

Observe national and local regulations for the disposal of electrical and electronic equipment.

Clear any data stored on the electrical and electronic equipment.

•

Remove any added battery or memory card in the electrical and electronic equipment.

Have the electrical and electronic equipment sent to your local collection point.

Improper disposal of electrical and electronic equipment can be harmful to the environment and human health.

2.1.4.1.2 Packaging

Packaging contains materials that can be reused.

PPWD 94/62/EU and 2004/12/EU packaging guidelines apply throughout

Europe. Directives and laws may vary nationally.

Environmentally friendly disposal of the packaging protects the environment and allows sustainable and efficient use of resources.

•

•

Observe national and local regulations for the disposal of packaging.

Dispose of packaging of all types that allows a high level of recovery, reuse and recycling.

Improper disposal of packaging can be harmful to the environment and wastes valuable resources.

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2.2 Safety Advice (Precautions)

For installing and operating purposes of the relevant device to your system the following safety precautions shall be observed:

Do not work on devices while energized!

All power sources to the device shall be switched off prior to performing any installation, repair or maintenance work.

Install device in only one suitable enclosure!

The device is an open system. Install the device in a suitable enclosure. This enclosure must:

• Guarantee that the max. permissible degree of pollution is not exceeded.

• Offer adequate protection against contact.

• Prevent fire from spreading outside of the enclosure.

• Offer adequate protection against UV irradiation.

• Guarantee mechanical stability

• Restrict access to authorized personnel and may only be opened with tools

Ensure disconnect and overcurrent protection!

The device is intended for installation in automation technology systems.

Disconnect protection is not integrated. Connected systems must be protected by a fuse.

Provide suitable disconnect and overcurrent protection on the system side!

Ensure a standard connection!

To minimize any hazardous situations resulting in personal injury or to avoid failures in your system, the data and power supply lines shall be installed according to standards, with careful attention given to ensuring the correct terminal assignment. Always adhere to the EMC directives applicable to your application.

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Power from SELV/PELV power supply only!

Important Notes 15

All field signals and field supplies connected to this I/O module (750-1491) must be powered from SELV/PELV power supply(s)!

System supply only with appropriate fuse protection!

Without overcurrent protection, the electronics can be damaged.

For 24V system supply input voltage an external fuse, rated max. 2 A, slow acting, min. 30 VDC shall be used.

Field supply only with appropriate fuse protection!

Without overcurrent protection, the electronics can be damaged.

For 24V field supply input voltage an external fuse, rated max. 10 A, slow acting, min. 30 VDC shall be used.

Do not exceed maximum values via power contacts!

The maximum current that can flow through the power jumper contacts is 10 A.

The power jumper contacts can be damaged and the permissible operating temperature can be exceeded by higher current values.

When configuring the system, do not exceed the permissible maximum current value. If there is a higher power requirement, you must use an additional supply module to provide the field voltage.

Do not exceed the maximum total current for I/O modules (5 VDC) via data contacts!

The maximum permissible total current for internal system supply of the I/O modules may not be exceeded. The permissible total current is specified in the technical data of the head station and power supply. The data contacts for internal system supply can be damaged and the permissible operating temperature can be exceeded by higher values.

When configuring the system, do not exceed the permissible total current. If there is a higher power requirement, you must use an additional supply to provide the system voltage (5 VDC)!

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Ensure proper contact with the DIN-rail!

Proper electrical contact between the DIN-rail and device is necessary to maintain the EMC characteristics and function of the device.

Replace defective or damaged devices!

Replace defective or damaged device/module (e.g., in the event of deformed contacts).

Protect the components against materials having seeping and insulating properties!

The components are not resistant to materials having seeping and insulating properties such as: aerosols, silicones and triglycerides (found in some hand creams). If you cannot exclude that such materials will appear in the component environment, then install the components in an enclosure being resistant to the above-mentioned materials. Clean tools and materials are imperative for handling devices/modules.

Clean only with permitted materials!

Clean housing and soiled contacts with propanol.

Do not use any contact spray!

Do not use any contact spray. The spray may impair contact area functionality in connection with contamination.

Do not reverse the polarity of connection lines!

Avoid reverse polarity of data and power supply lines, as this may damage the devices involved.

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Important Notes 17

Avoid electrostatic discharge!

The devices are equipped with electronic components that may be destroyed by electrostatic discharge when touched. Please observe the safety precautions against electrostatic discharge per DIN EN 61340-5-1/-3. When handling the devices, please ensure that environmental factors (personnel, work space and packaging) are properly grounded.

Correct grounding required!

Incorrectly grounded power supply units can distort the measurement signal.

Make sure that the mounting rail and power supply unit(s) are properly grounded.

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18 Device Description

3 Device Description

WAGO I/O System 750


The analog input module 750-1491 (2AI Resistor Bridge (Strain Gauge)) directly connects to two resistor bridges.

Connection assignment is described in Section “Connections”; connection examples are given in Section “Connecting Devices” > ... > “Connection

Examples.”

The bridge voltage U d

and supply voltage U ref

of the respective bridge are digitized with a 16-bit resolution. The two input channels for the respective resistor bridge are available as two 16-bit values for additional processing.

The bridge detuning can be determined from the quotients of the two measurement values U d

and U ref

.

Use resistor bridges only!

The analog input module 750-1491 (2AI Resistor Bridge (Strain Gauge)) is designed for connecting two resistor bridges.

Use as a 4-channel module for simple voltage measurement with different measurement ranges is not intended.

Such use could lead to higher measurement errors.

One green status LED per input indicates the operating status and error-free local bus communication. One red error LED per input indicates a measurement underrange/overrange, an overflow/underflow or an internal error. The meaning of the LEDs is described in Section “Display Elements.”

Field and system levels are electrically isolated. Both channels (resistor bridges) are electrically isolated from one another.

Any I/O module configuration is possible in the design of the fieldbus node, if the power jumper contacts are taken into account. An arrangement in blocks within the potential group is not necessary.

The I/O module 750-1491 (2AI Resistor Bridge (Strain Gauge)) can be used with the fieldbus couplers/controllers of the WAGO 750 I/O System listed in the

“Compatibility List” table starting with the version indicated.

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Table 3: Compatibility List 750-1491

Item No.

PROFINET Fieldbus Coupler

PROFIBUS Fieldbus Coupler

ETHERNET

DeviceNet

CANopen

750-375

750-377

750-333

Fieldbus Coupler

Controller

ECO Fieldbus Coupler

Controller

750-871

750-872

750-873

750-880

750-881

750-882

750-885

750-890

750-891

750-893

Application Controller BA 750-884

PFC100

PFC200

750-810x

750-82xx

Fieldbus Coupler

ECO Fieldbus Coupler

Controller

Fieldbus Coupler

750-306

750-346

750-806

750-337

750-338

750-347

750-348

750-837

750-838

750-341

750-342

750-352

750-362

750-363

750-823

750-841

750-842

750-843

750-852

750-862

Device Description 19

Firmware

Version

09

09

23

21

19

03

14

07

09

19

14

07

07

07

09

05

05

14

14

14

14

4M

11

11

22

22

07

07

07

14

16

16

12

12

18

18

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Table 3: Compatibility List 750-1491

Fieldbus Coupler

Modbus ®

Controller

EtherCat

Fieldbus Coupler

Fieldbus Coupler

BACnet

Controller

KNX Controller

WAGO I/O System 750


Item No.

750-315/300-000

750-316/300-000

750-815/300-000

750-816/300-000

750-354

750-330

750-332

750-829

750-832

750-831

750-849

750-889

Firmware

Version

01

01

01

01

05

09

02

09

02

13

05

14

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3.1 View


Figure 1: View

Table 4: Legend for Figure “View”

Pos. Description

1 Marking possibility with Mini-

WSB

2 Status LEDs

3 Data contacts

4 Push-in CAGE CLAMP ® connectors

5 Power jumper contacts

6 Release tab

Details See Section

---

“Device Description” > “Display Elements”

“Device Description” > “Connectors”



“Mounting” > “Inserting and Removing

Devices”

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3.2 Connectors

WAGO I/O System 750


3.2.1 Data Contacts/Local Bus

Communication between the fieldbus coupler/controller and the I/O modules as well as the system supply of the I/O modules is carried out via the local bus. The contacting for the local bus consists of 6 data contacts, which are available as self-cleaning gold spring contacts.

Figure 2: Data Contacts

Do not place the I/O modules on the gold spring contacts!

Do not place the I/O modules on the gold spring contacts in order to avoid soiling or scratching!

Pay attention to potential equalization from the environment!

The devices are equipped with electronic components that may be destroyed by electrostatic discharge. When handling the devices, please ensure that environmental factors (personnel, work space and packaging) are properly equalized. Do not touch any conducting parts, e.g., data contacts.

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3.2.2 Power Jumper Contacts/Field Supply


Risk of injury due to sharp-edged blade contacts!

The blade contacts are sharp-edged. Handle the I/O module carefully to prevent injury. Do not touch the blade contacts.

The I/O module 750-1491 has 2 self-cleaning power jumper contacts that supply and transmit power for the field side. The contacts on the left side of the I/O module are designed as blade contacts and those on the right side as spring contacts.

Figure 3: Power Jumper Contacts

Table 5: Legend for Figure “Power Jumper Contacts”

Contact

1

2

Type Function

Spring contact Potential transmission (U v

) for field supply

Spring contact Potential transmission (0 V) for field supply

3

4

Blade contact Potential feed-in (0 V) for field supply

Blade contact Potential feed-in (U v

) for field supply

Do not exceed maximum values via power contacts!

The maximum current that can flow through the power jumper contacts is 10 A.

The power jumper contacts can be damaged and the permissible operating temperature can be exceeded by higher current values.

When configuring the system, do not exceed the permissible maximum current value. If there is a higher power requirement, you must use an additional supply module to provide the field voltage.

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24 Device Description WAGO I/O System 750


Use supply modules for ground (earth)!

The I/O module has no power jumper contacts for receiving and transmitting the earth potential. Use a supply module when an earth potential is needed for the subsequent I/O modules.

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3.2.3 Push-in CAGE CLAMP

®

Connectors


Figure 4: Push-in CAGE CLAMP ® Connectors

Table 6: Legend for Figure “Push-in CAGE CLAMP ® Connectors”

Channel Designation Connector Function

+U

−U d d

1

1

1

2

Differential measurement input; bridge voltage (+), channel 1

Differential measurement input; bridge voltage (−), channel 1

−U v

1 3

1 +U

−U

+U ref ref v

1

1

1

Shield 1

9

10

11

4

12

Internal supply voltage (−), channel 1

Reference measurement input; supply voltage (+), channel 1

Reference measurement input; supply voltage (−), channel 1

Internal supply voltage (+), channel 1

Shield connection, channel 1

2

+U

−U

−U

+U

−U

+U d d v ref ref v

2

2

2

2

2

2

Shield 2

5

6

7

13

14

15

8

16

Differential measurement input; bridge voltage (+), channel 2

Differential measurement input; bridge voltage (−), channel 2

Internal supply voltage (−), channel 2

Reference measurement input; supply voltage (+), channel 2

Reference measurement input; supply voltage (−), channel 2

Internal supply voltage (+), channel 2

Shield connection, channel 2

Manual

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26 Device Description WAGO I/O System 750


Use shielded signal lines!

Only use shielded signal lines for analog signals and I/O modules which are equipped with shield clamps. Only then can you ensure that the accuracy and interference immunity specified for the respective I/O module can be achieved even in the presence of interference acting on the signal cable.

Shield Connection System for Electromagnetic Compatibility!

The WAGO Shield Connection System offers a full range of accessories for maintaining electromagnetic compatibility (EMC)! Related information is available at www.wago.com.

3.3 Display Elements

Figure 5: Display Elements

Table 7: Legend for Figure “Display Elements”

Channel Designation LED Description

1

Function U d

1

Error U d

Function U

1 ref

1

1

2

9

Status, bridge voltage U

Error, bridge voltage U d d

1

1

Status, reference voltage U ref

1

Error U ref

Function U

1 d

2

10 Error, reference voltage U ref

3 Status, bridge voltage U d

2

1

2

Error U d

2 4 Error, bridge voltage U d

2

Function U ref

2 11 Status, reference voltage U ref

2

Error U ref

2 12 Error, reference voltage U ref

2

Manual

Version 1.0.0

WAGO I/O System 750


3.4 Schematic Diagram


Figure 6: Schematic Diagram

Manual

Version 1.0.0


3.5 Technical Data

WAGO I/O System 750


Table 8: Technical Data

Width

Height

Depth

Weight

Number of analog inputs

12 mm

69 mm

100 mm

50 g

2 × 2, differential

Supply voltage (system)

Power consumption – system supply

(5 V)

Signal voltage U ref

5 VDC, via data contacts

70 mA (typ.) without sensor supply;

200 mA (max.) at full sensor supply capacity

24 VDC Voltage via power jumper contacts

Current via power jumper contacts max

10 A

Signal type

Sensor connection

Resistor bridge (strain gauge)

4 wires with internal or external supply or 6 wires with internal supply

Signal voltage U d

±15 mV; ±30 mV; ±60 mV; ±120 mV;

±240 mV; ±360 mV internal: +5 V; external: ±5 V; ±10 V; ±15 V

Internal sensor supply U

V

Common mode rejection

Internal resistance U d

Internal resistance U

Interference frequency suppression

Resolution

Conversion time

Measurement error (at 25 °C)

Data width ref

Outputs U

V

1, U

V

2:

+5 VDC, 50 mA (max.) each

>87 dB

>1.4 M Ω

20 k Ω

10 Hz/50 Hz/60 Hz/200 Hz/400 Hz; configurable

16 bits

10 ms (min.)

(depending on filter and filter mode)

U d

U ref

: ±30 µV;

: ±0.05 % of the upper-range value

Measurement error over temperature ±0.2 % of the upper-range value; with user calibration up to ±0.05 %

Isolation 1.2 kVDC system/channel and channel/channel

4 × 16-bit data;

4 × 8-bit control/status (optional, configurable)

1-channel mode 2 × 16-bit data;

2 × 8-bit control/status (optional, configurable)

Manual

Version 1.0.0

WAGO I/O System 750


3.5.1 Connection Type


Table 9 : Technical Data ‒ Field Wiring

Wire connection

Cross section, solid wire

Cross section, fine-stranded wire

Push-in CAGE CLAMP ®

Stripped lengths

Table 10: Technical Data – Power Jumper Contacts

8 mm … 9 mm / 0.33 in

Power jumper contacts

Table 11: Technical Data – Data Contacts

Data contacts

0.08 mm² … 1.5 mm² / AWG 28 … 16

0.25 mm² … 1.5 mm² / AWG 22 … 16

Blade/spring contact, self-cleaning

Slide contact, hard gold plated, selfcleaning

3.5.2 Climatic Environmental Conditions

Table 12: Technical Data – Climatic Environmental Conditions

Surrounding air temperature, operation 0 °C … 55 °C

Surrounding air temperature, storage −25 °C … +85 °C

Operating altitude 0 … 2000 m;

(> 2000 m upon request)

Relative humidity

Pollution degree

Protection type

Resistance to harmful substances

Max. 5 % … 95 % without condensation

2

IP20

Acc. to IEC 60068-2-42 and

IEC 60068-2-43

Maximum pollutant concentration at relative humidity < 75 %

Special conditions

SO

2

H

2

≤ 25 ppm

S ≤ 10 ppm

Ensure that additional measures for components are taken, which are used in an environment involving:

– dust, caustic vapors or gases

– ionizing radiation

Manual

Version 1.0.0


3.6 Approvals

WAGO I/O System 750


More information about approvals.

Detailed references to the approvals are listed in the document “ Overview on

WAGO I/O System 750 approvals ”, which you can find via the internet under: www.wago.com

 DOWNLOADS  Documentation  System Description.

Conformity Marking

Korea Certification MSIP-REM-W43-AIM750

The following approvals are pending for 750-1491 I/O modules:

UL E175199 for use in Ordinary Location

UL E198726 for Use in Hazardous Locations

Cl I, Div 2, Group A, B, C, D, T4

The following Ex approvals are pending for 750-1491 I/O modules:

TÜV 14 ATEX 148929 X

IECEx TUN 14.0035 X

Manual

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WAGO I/O System 750



3.7 Standards and Guidelines

750-1491 I/O modules meet the following standards and guidelines:

EMV Directive

EMV CE Immunity to interference

EMV CE Emission of interference

2014/30/EU

EN 61000-6-2

EN 61000-6-3

Manual

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32 Process Image

4 Process Image

WAGO I/O System 750


The I/O module (750-1491) provides one control/status byte (8 bits) and one data word (16 bits) per input.

The I/O module records the input voltage ranges with a 16-bit process value resolution.

The digitalized measured value is transmitted to the head station´s process image in a data word (16 bits) as input byte “0” (low) and input byte “1” (high).

With the setting “Process Image: Standard,” the head station hides the control/ status bytes of all inputs.

With the setting “Process Image: Extended,” the control/status bytes are shown in the fieldbus process image.

With the setting "1-channel mode" the number of resistor bridges can be reduced from 2 to 1. In this setting, only 2 instead of 4 inputs are available.

The required settings can be made through parameterization with the

WAGO-I/OCHECK commissioning tool. Alternatively, the I/O module can also be parameterized via PROFIBUS and PROFINET device description (GSD file). The parameterization description can be found in the appendix in Section

“Configuration and Parameterization via GSD File with PROFIBUS DP and

PROFINET IO.”

4.1 Overview

Control/status byte with setting “Process Image: Standard”:

Representation depends on the head station!

The I/O module provides the head station with a complete process image, including control/status bytes. The WAGO-I/OCHECK commissioning tool accesses the complete commissioning process image. The head station uses a different process image for provision of cyclic process data via the fieldbus.

Presentation of control/status bytes may be suppressed in this other process image, depending on the head station used (see table “Process Image

(‘Standard’)” or table “Process Image (‘Standard’) in 1-Channel Mode”)

Manual

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WAGO I/O System 750


Process Image 33

Table 13: Process Image (“Standard”)

Byte 0

Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

Byte 6

Byte 7

Process Image

Input 1)

Process value I1_D0

Process value I1_D1

Process value I2_D0

Process value I2_D1

Process value I3_D0

Process value I3_D1

Process value I4_D0

Process value I4_D1

1) Ix_D0 = Process value low byte from input x

Ix_D1 = Process value high byte from input x

Table 14: Process Image (“Extended”)

Byte 0

Byte 1

Byte 2

Input 1)

Status byte I1_S0

Process value I1_D0

Process value I1_D1

Process Image

Output 2)

Byte 0 Control byte I1_C0

Byte 1

Byte 2

Reserved

Reserved

Byte 3

Byte 4

Byte 5

Byte 6

Byte 7

Status byte I2_S1

Process value I2_D0

Process value I2_D1

Status byte I3_S2

Process value I3_D0

Byte 8

Byte 9

Process value I3_D1

Status byte I4_S3

Byte 10 Process value I4_D0

Byte 11 Process value I4_D1

Byte 3

Byte 4

Byte 8

Byte 9

Control byte I2_C1

Reserved

Byte 5 Reserved


Byte 7 Reserved

Reserved

Control byte I4_C3

Byte 10 Reserved

Byte 11 Reserved

1) Ix_Sx = Status byte x from input x

Ix_D0 = Process value low byte from input x


2) Ix_Cx = Control byte x from input x

Manual

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34 Process Image WAGO I/O System 750


Table 15: Process Image (“Standard”) in 1-Channel Mode

Process Image

1)

Byte 0

Input

Process value I1_D0

Byte 1

Byte 2

Byte 3

Process value I1_D1

Process value I2_D0

Process value I2_D1

1) Ix_D0 = Process value low byte from input x


Table 16: Process Image (“Extended”) in 1-Channel Mode

Process Image

Input 1)

Byte 0 Status byte I1_S0

Output 2)


Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

Process value I1_D0

Process value I1_D1

Status byte I2_S1

Process value I2_D0

Process value I2_D1

1) Ix_Sx = Status byte x from input x

Ix_D0 = Process value low byte from input x


2) Ix_Cx = Control byte x from input x

Byte 1 Reserved

Byte 2 Reserved


Byte 4 Reserved

Byte 5 Reserved

4.2 Control and Status Byte

Control and status bytes are implemented identically for all inputs. Therefore, the following description in this section applies to all control and status bytes of the I/O module.

Table 17: Control Byte

Bit 7

RegCom = 0

RegCom = 1

Bit 6

-

Bit 5

-

0/1

Register communication

Control Byte

Bit 4

-

Bit 3

-

Bit 2

-

Register number

RegCom 0:

1:

Switch register communication off

Switch register communication on

0/1

-

Reserved

Not used

Bit 1

-

Bit 0

-

Manual

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WAGO I/O System 750


Process Image 35

Table 18: Status Byte

Bit 7

RegCom

Underrange

Bit 6

Error

General

Bit 5

Status Byte

Bit 4 Bit 3

Overflow Underflow

User

Overrange

Bit 2

User

Underrange

Bit 1

Overrange

Bit 0

Underrange

Measurement underrange

0: The field-side input voltage is above the measurement range lower limit.

Overrange

1: The field-side input voltage is below the measurement range lower limit.

Measurement overrange

0:

1:

The field-side input voltage is above the measurement range upper limit.

The field-side input voltage is below the measurement range upper limit.

User

Underrange

User limiting value underrange

0: The field-side input voltage is above the measurement range lower limit configured by the user.

1: The field-side input voltage is below the measurement range lower limit configured by the user.

User

Overrange

User limiting value overrange

0: The field-side input voltage is above the measurement range upper limit configured by the user.

1: The field-side input voltage is below the measurement range upper limit configured by the user.

Underflow Underflow

0: No underflow

1: Underflow of the measuring range

Overflow Overflow

0:

1:

No overflow

Overflow of the measuring range

General Error General error / Internal error

0: No error present, or bit 0 (measurement underrange), bit 1 (measurement overrange), bit 4 (underflow) or bit 5 (overflow) is not set.

1: General error present; bit 0 (measurement underrange), bit 1

(measurement overrange), bit 4 (underflow) or bit 5 (overflow) is set.

Internal error present (ADC error) bit 0 (measurement underrange), bit 1

(measurement overrange), bit 4 (underflow) or bit 5 (overflow) is not set.

RegCom Register communication

0:

1:

Register communication is inactive (normal mode)

Register communication is enabled

Manual

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36 Process Image

4.2.1 Process Data

WAGO I/O System 750


4.2.2 Overview of Signal Voltages

The following table provides an overview of all supported signal voltages.

The following sections contain detailed information about the individual signal voltages. The information provided in the respective tables on the resolution of the measured values and the raw value ranges yielded from this are based on manufacturing scaling.

Table 19: Overview of Signal Voltages

Signal Voltage

Input deactivated

Measurement

Range

Representation

Two's Complement /

Amount Sign

Resolution Raw Value Range

Strain Gauge (Inputs 1 and 3)

Bridge voltage U d

(±15 mV)

Bridge voltage U d

(±30 mV)

Bridge voltage U d

(±60 mV)

Bridge voltage U d

(±120 mV)

Bridge voltagU d

(±240 mV)

Bridge voltage U d

(±360 mV)

Reference voltage U ref

(5 V)


(±5 V)


(±10 V)

−15 …+15 mV

−30 …+30 mV

−60 …+60 mV

−120 …+120 mV

0,0006 mV

0,0012 mV

0,0024 mV

0,0048 mV

−240 …+240 mV

−360 …+360 mV

0,0096 mV

0,0144 mV

Strain Gauge (Inputs 2 and 4)

+2.5 …+5 V

−5 …+5 V

0.20 mV

0.20 mV

−10 …+10 V

−15 …+15 V

0.40 mV

0.60 mV

− 25000…25000

− 25000…25000


(±15 V)

Manual

Version 1.0.0

WAGO I/O System 750


4.2.3 Conversion of the Process Values

Process Image 37

Figure 7: Calculation Process – Process Value to Measured Value

This yields the following formulas for converting the local bus process value to the measured value: e.g., for the Strain Gauge bridge voltage measurement range U d

(±15 mV):

𝑈𝑈 ( 𝑥𝑥 ) = 𝑥𝑥

25000

∗ 15 𝑚𝑚𝑚𝑚 e.g., for the Strain Gauge reference voltage measurement range U ref

(±5 V):

𝑈𝑈 ( 𝑥𝑥 ) = 𝑥𝑥

25000

∗ 5000 𝑚𝑚𝑚𝑚 when x = (INT16) process value and U is a float/double!

Manual

Version 1.0.0



4.2.4 Resistor Bridge (Strain Gauge)

For Strain Gauge (SG) measurements, the I/O module outputs the measured values as a process value standardized to 25000.

Example: The defined measuring range of −15 mV ... +15 mV corresponds to a possible process value of −25000 ... +25000.

The voltage values are represented at a resolution that depends on the measuring range:

•

•

•

•

•

•

•

•

•

•

1 digit per 0.0006 mV (S G – U

1 digit per 0.0012 mV (S G – U

1 digit per 0.0048 mV (S G – U d d

±15 mV)

±30 mV)

1 digit per 0.0024 mV (S G – U d

±60 mV)


±120 mV) d


±240 mV)

±360 mV)

1 digit per 0.20 mV (S



G – U

G – U ref

G S – U

1 digit per 0.40 mV (S G – U ref ref

+5 V internal) ref

±5 V external)

±10 V external)

±15 V external) in one word (16 bits).

Voltage values below 0 mV are represented in two's complement binary.

The voltage underranges and overranges relate to manufacturer range violations.

Representation in the tables: Corresponding monitoring must be switched on!

The “Underflow”, “Overflow”, “Underrange” and “Overrange” areas require that the corresponding monitoring is switched on (see Section “Diagnostics” >

“Behavior in the Event of an Error”).

Manual

Version 1.0.0

WAGO I/O System 750


4.2.5 SG Bridge Voltage U

d

(±15 mV)

Table 20: SG Bridge Voltage Settings U

Voltage [mV]

≤ −17.5006

−17.5

−15.,0006

−15.0

Numeric Value 1)

Binary d

(±15 mV)

Hex. Dec.

Status

Byte

Hex.

'1000.0000.0000.0000' 0x8000 −32768 0x50

'1000.1110.0001.0001' 0x8E11 −29167

0x41

'1001.1110.0101.0111' 0x9E57 −25001

'1001.1110.0101.1000' 0x9E58 −25000

−7.5

7.5

15.0

15.0006

17.5

≥ 17.5006

'1100.1111.0010.1100' 0xCF2C −12500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

'0111.0001.1110.1110' 0x71EE 29167

'0111.1111.1111.1111' 0x7FFF 32767

0x00

0x42

0x60

1) Process values below 0 are represented in binary form as the two’s complement.

Process Image 39

Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow


d

(±30 mV)

Table 21

:

SG Bridge Voltage Settings U

Voltage [mV]

≤ − 35.0012

− 35.0

− 30.0012

− 30.0

− 15.0

15.0

30.0


Binary d

(±30 mV)

Hex. Dec.

'1001.1110.0101.1000' 0x9E58 − 25000

'1100.1111.0010.1100' 0xCF2C − 12500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

Status

Byte

Hex.

'1000.0000.0000.0000' 0x8000 − 32768 0x50

'1000.1110.0001.0001' 0x8E11 − 29167

'1001.1110.0101.0111' 0x9E57 − 25001

0x41

0x00

30.0012

35.0

≥ 35.0012

'0110.0001.1010.1001' 0x61A9 25001

'0111.0001.1110.1110' 0x71EE 29167

'0111.1111.1111.1111' 0x7FFF 32767

0x42

0x60


Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow

Manual

Version 1.0.0




d

(±60 mV)


Voltage [mV]

≤ − 70.0024

− 70.0

− 60.0024

− 60.0


Binary d

(±60 mV)

Hex. Dec.

Status

Byte

Hex.

'1000.0000.0000.0000' 0x8000 − 32768 0x50

'1000.1110.0001.0001' 0x8E11 − 29167

0x41

'1001.1110.0101.0111' 0x9E57 − 25001

'1001.1110.0101.1000' 0x9E58 − 25000

− 30.0

30.0

60.0

60.0024

70.0

≥ 70.0024

'1100.1111.0010.1100' 0xCF2C − 12500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

'0111.0001.1110.1110' 0x71EE 29167

'0111.1111.1111.1111' 0x7FFF 32767

0x00

0x42

0x60


Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow


d

(±120 mV)


Voltage [mV]

Numeric Value

Binary d

(±120 mV)

1)

Hex. Dec.

Status

Byte

Hex.

≤ − 140.0048 '1000.0000.0000.0000' 0x8000 − 32768 0x50

−

− 140.0

120.0048

'1000.1110.0001.0001' 0x8E11

'1001.1110.0101.0111' 0x9E57

−

−

29167

25001

0x41

− 120.0

− 60.0

60.0

120.0

120.0048

140.0

≥ 140.0048

'1001.1110.0101.1000' 0x9E58 − 25000

'1100.1111.0010.1100' 0xCF2C − 12500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

'0111.0001.1110.1110' 0x71EE 29167

'0111.1111.1111.1111' 0x7FFF 32767

0x00

0x42

0x60


Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow

Manual

Version 1.0.0

WAGO I/O System 750



d

(±240 mV)


Voltage [mV]

Numeric Value

Binary d

(±240 mV)

1)

Hex. Dec.

Status

Byte

Hex.

≤ − 280.0096 '1000.0000.0000.0000' 0x8000 − 32768 0x50

− 280 '1000.1110.0001.0001' 0x8E11 − 29167

0x41

− 240.0096

− 240

'1001.1110.0101.0111' 0x9E57 − 25001

'1001.1110.0101.1000' 0x9E58 − 25000

− 120

120

240

240.0096

280

≥ 280.0096

'1100.1111.0010.1100' 0xCF2C − 12500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

'0111.0001.1110.1110' 0x71EE 29167

'0111.1111.1111.1111' 0x7FFF 32767

0x00

0x42

0x60


Process Image 41

Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow


d

(±360 mV)


Voltage [mV]

Numeric Value

Binary d

(±360 mV)

1)

Hex. Dec.

Status

Byte

Hex.

≤ − 420.0144 '1000.0000.0000.0000' 0x8000 − 32768 0x50

−

− 420

360.0144

'1000.1110.0001.0001' 0x8E11

'1001.1110.0101.0111' 0x9E57

−

−

29167

25001

0x41

− 360

− 180

180

360

360.0144

420

≥ 420.0144

'1001.1110.0101.1000' 0x9E58 − 25000

'1100.1111.0010.1100' 0xCF2C − 12500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

'0111.0001.1110.1110' 0x71EE 29167

'0111.1111.1111.1111' 0x7FFF 32767

0x00

0x42

0x60


Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow

Manual

Version 1.0.0



4.2.11 SG

Reference Voltage

U

ref

(+5 V internal)

Table 26: SG Reference Voltage Settings U

Voltage [mV]

≤ −2.2

−2

2499.8

2500

5000

5000.2

5500

≥ 5500.2

ref

(+5 V, internal)

Numeric Value

Binary

1)

Hex. Dec.

'1000.0000.0000.0000' 0x8000 − 32768 0x50

'1111.1111.1111.0110' 0xFFF6 −10

0x41

'1001.1110.0101.0111' 0x30D3 12499

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

0x00

'0110.0001.1010.1001' 0x61A9 25001

'0111.0001.1110.1110' 0x6B6C 27500

'0111.1111.1111.1111' 0x7FFF 32767

Status

Byte

Hex.

0x42

0x60


4.2.12 SG


U

ref

(±5 V external)


Voltage [mV]

≤ − 5500.2

Numeric Value

Binary ref

(±5 V, external)

1)

Hex. Dec.

Status

Byte

Hex.

'1000.0000.0000.0000' 0x8000 − 32768 0x50

− 5500

− 5000.2

− 5000

− 2500

'1001.0100.1001.0100' 0x9494 − 27500

'1001.1110.0101.0111' 0x9E57 − 25001

'1001.1110.0101.1000' 0x9E58 − 25000

'1100.1111.0010.1100' 0xCF2C − 12500

0x41

2500

5000

5000.2

5500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

'0110.1011.0110.1100' 0x6B6C 27500

0x00

0x42

≥ 5500.2 '0111.1111.1111.1111' 0x7FFF 32767 0x60


Error

LED

On

On

Off

On

On

Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow

Range

Underflow

Underrange

Nominal range

Overrange

Overflow

Manual

Version 1.0.0

WAGO I/O System 750


4.2.13 SG


U

ref



Voltage [mV]

≤ − 11000.4

− 11000

− 10000.4

− 10000

Numeric Value

Binary ref

(±10 V, external)

1)

Hex. Dec.

Status

Byte

Hex.

'1000.0000.0000.0000' 0x8000 − 32768 0x50

'1001.0100.1001.0100` 0x9494 − 27500

0x41

'1001.1110.0101.0111' 0x9E57 − 25001

'1001.1110.0101.1000' 0x9E58 − 25000

− 5000

5000

'1100.1111.0010.1100' 0xCF2C − 12500

'0011.0000.1101.0100' 0x30D4 12500

0x00

10000

10000.4

11000

≥ 11000.4

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

'0110.1011.0110.1100' 0x6B6C 27500

'0111.1111.1111.1111' 0x7FFF 32767

0x42

0x60


4.2.14 SG


U

ref



Voltage [mV]

≤ − 16500.6

− 16500

− 15000.6

− 15000

Numeric Value

Binary ref

(±15 V, external)

1)

Hex. Dec.

Status

Byte

Hex.

'1000.0000.0000.0000' 0x8000 − 32768 0x50

'1001.0100.1001.0100' 0x9494 − 27500

0x41

'1001.1110.0101.0111' 0x9E57 − 25001

'1001.1110.0101.1000' 0x9E58 − 25000

− 7500

7500

15000

15000.6

16500

≥ 16500.6

'1100.1111.0010.1100' 0xCF2C − 12500

'0011.0000.1101.0100' 0x30D4 12500

'0110.0001.1010.1000' 0x61A8 25000

'0110.0001.1010.1001' 0x61A9 25001

0110.1011.0110.1100' 0x71EE 29167

'0111.1111.1111.1111' 0x7FFF 32767

0x00

0x42

0x60


Process Image 43

Error

LED

On

On

Off

On

On

Error

LED

On

On

Off

On

On

Range

Underflow

Underrange

Nominal range

Overrange

Overflow

Range

Underflow

Underrange

Nominal range

Overrange

Overflow

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5 Mounting

WAGO I/O System 750


Do not work when devices are energized!

High voltage can cause electric shock or burns.

Switch off all power to the device prior to performing any installation, repair or maintenance work.

Risk of injury due to sharp-edged blade contacts!

The blade contacts are sharp-edged. Handle the I/O module carefully to prevent injury. Do not touch the blade contacts.

Do not contaminate contacts!

Contamination may negatively impact the functionality of data and power jumper contacts. Do not touch the contacts. Avoid contaminating the contacts.

Do not place the I/O modules on the gold spring contacts!

Do not place the I/O modules on the gold spring contacts in order to avoid soiling or scratching!

Pay attention to potential equalization from the environment!

The devices are equipped with electronic components that may be destroyed by electrostatic discharge. When handling the devices, please ensure that environmental factors (personnel, work space and packaging) are properly equalized. Do not touch any conducting parts, e.g., data contacts.

Follow the installation instructions!

Only install this device in dry, indoor rooms.

Do not install the device on or in the vicinity of easily flammable materials!

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5.1 Mounting Sequence

Mounting 45

Fieldbus couplers, controllers and I/O modules of the WAGO I/O System 750 are snapped directly on a carrier rail in accordance with the European standard EN

60175 (DIN 35).

The reliable positioning and connection is made using a tongue and groove system. Due to the automatic locking, the individual devices are securely seated on the rail after installation.

Starting with the fieldbus coupler or controller, the I/O modules are mounted adjacent to each other according to the project design. Errors in the design of the node in terms of the potential groups (connection via the power contacts) are recognized, as the I/O modules with power contacts (blade contacts) cannot be linked to I/O modules with fewer power contacts.

Insert I/O modules only from the proper direction!

All I/O modules feature grooves for power jumper contacts on the right side. For some I/O modules, the grooves are closed on the top. Therefore, I/O modules featuring a power jumper contact on the left side cannot be snapped from the top. This mechanical coding helps to avoid configuration errors, which may destroy the I/O modules. Therefore, insert I/O modules only from the right and from the top.

Don't forget the bus end module!

Always plug a bus end module (750-600) onto the end of the fieldbus node! You must always use a bus end module at all fieldbus nodes with WAGO I/O System

750 fieldbus couplers or controllers to guarantee proper data transfer.

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46 Mounting WAGO I/O System 750


5.2 Inserting and Removing Devices

5.2.1 Inserting the I/O Module

1. Position the I/O module in such a way that the groove and spring are connected to the preceding and following components.

Figure 8: Inserting I/O Module (Example)

2. Press the I/O module into the assembly until the I/O module snaps into the carrier rail.

Figure 9: Snap the I/O Module into Place (Example)

3. Check that the I/O module is seated securely on the carrier rail and in the assembly. The I/O module must not be inserted crooked or askew.

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Mounting 47

Once the I/O module has snapped into place, the electrical connections for the data contacts and power contacts (if any) to the head station or to the preceding and, if applicable, following I/O module are established.

5.2.2 Removing the I/O Module

1. Remove the I/O module from the assembly by pulling the release tab.

Figure 10: Removing the I/O Module (Example)

Electrical connections for data or power jumper contacts are disconnected when removing the I/O module.

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6 Connect Devices

WAGO I/O System 750


Correct grounding required!

Incorrectly grounded power supply units can distort the measurement signal.

Make sure that the mounting rail and power supply unit(s) are properly grounded.

6.1 Connecting a Conductor to the Push-in CAGE

CLAMP

®

The Push-in CAGE CLAMP ® finely stranded conductors. connection is appropriate for solid, stranded and

Only connect one conductor to each Push-in CAGE CLAMP ® connection!

Only one conductor may be connected to each Push-in CAGE CLAMP ® connection.

Do not connect more than one conductor at one single connection!

If more than one conductor must be routed to one connection, these must be connected in an up-circuit wiring assembly, for example using WAGO feedthrough terminals.

Terminate both solid and stranded or ferruled conductors by simply pushing them in - no tool required. For all other types of conductors, Push-in CAGE CLAMP ® must be opened for connection with an operating tool with a 2.5 mm blade (order no. 210-719).

1. To open the Push-in CAGE CLAMP ® opening above the connection.

insert the actuating tool into the

2. Insert the conductor into the corresponding connection opening.

3. To close the Push-in CAGE CLAMP ® simply remove the tool - the conductor is then clamped firmly in place.

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Connect Devices 49

Figure 11: Connecting a Conductor to a Push-in CAGE CLAMP ®

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6.2 Connection Examples

WAGO I/O System 750


Use shielded signal lines!

Only use shielded signal lines for analog signals and I/O modules which are equipped with shield clamps. Only then can you ensure that the accuracy and interference immunity specified for the respective I/O module can be achieved even in the presence of interference acting on the signal cable.

Disable unneeded inputs!

The I/O module (2AI Resistor Bridge (Strain Gauge)) has very sensitive measurement inputs.

Disable unused inputs to avoid unwanted error messages.

Section “Configuration and Parameterization with WAGO-IOCHECK ” describes how one input, or the diagnostics of individual inputs, of the I/O module can be switched on/off.

6.2.1 6-Wire Operation

Figure 12: Connection Example – 6-Wire Operation (4 wires including bridge supply)

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6.2.2 4-Wire Operation (Internal Supply)

Connect Devices 51

Use WAGO Through Terminal Blocks!

As in this example, if two conductors are to routed to CAGE CLAMP ® they must be connected in an up-circuit wiring assembly.

connection,

Figure 13: Connection Example – 4-Wire Operation with Internal Supply

6.2.3 4-Wire Operation (External Supply)

Figure 14: Connection Example – 4-Wire Operation with External Supply

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6.2.4 Calibration

WAGO I/O System 750


6.2.4.1 Connection Examples with External Power Supply

Figure 15: Wiring Examples for Calibration of the Bridge Voltage U d

(External Power Supply)

Figure 16: Wiring Examples for Calibration of the Reference Voltage U ref

(External Power Supply)

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6.2.4.2 Connection Examples with Internal Power Supply

Connect Devices 53


(Internal Power Supply)

Figure18: Wiring Examples for Calibration of the Reference Voltage U ref

(Internal Power Supply)

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7 Commissioning

WAGO I/O System 750


The following actions can be performed:

•

•

•

•

•

•

•

•

Read out module information

Configure inputs

Calibrate inputs

Scale inputs (see also Section “Scaling Measured Values”)

Read out diagnostic information

Output process data

Perform firmware update (see also Section “Service” > “Firmware

Update/Downgrade”)

Perform firmware downgrade (see also Section “Service” > “Firmware

Update/Downgrade”

7.1 Preparation

7.1.1 Filter Mode

You can choose between 2 filter modes:

•

• precise

In this filter mode, the interference frequency is suppressed by a broadband notch filter, including frequencies in the sidebands. Therefore, there is good interference suppression even at higher frequencies (> 40 dB, low pass).

However, a 3× conversion time compared to the “fast” filter mode has to be accepted fast (default setting)

The interference suppression in this filter mode is precisely optimized for the set filter frequency; the attenuation decreases in the sidebands. Higher frequencies are not attenuated as much as in the “precise” filter mode. In return, the conversion time is significantly shorter.

Reduce aliasing effects!

The suppression of high interference frequencies and noise decreases the higher you select the value for the filter frequency. This can lead to so-called aliasing effects in the “200 Hz” and “400 Hz” ranges. Ensure that the sensitive sensor signals are adequately protected (e.g., by shielding)!

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7.2 Tooling

The following matrix specifies which tool can be used to make settings on the I/O module:

Table 30: Settings Using Tools

Settings

Channels enabled/disabled

Bridge voltage

Reference voltage

Process image

1-channel mode

Number format


Filter mode

Smoothing

Input diagnostics / channel diagnostics

Diagnosis: overflow

Diagnosis: underflow

Diagnosis: measurement underrange

Diagnosis: measurement overrange

Diagnosis/process alarm: lower user limit value

Diagnosis/process alarm: upper user limit value

User limit values

Scaling

Calibration e!COCKPIT WAGO-I/OCHECK PB-GSD PN-GSD

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

-

-

-

-

-

-

-

-

-

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

-

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56 Commissioning WAGO I/O System 750


7.3 Configuration and Parameterization with

WAGO-I/OCHECK

The I/O Module 750-1491 is supported by the WAGO-I/OCHECK commissioning tool staring with version 03.24.04(01).

•

•

•

•

•

•

•

WAGO-I/OCHECK can be used to conveniently and completely configure and parameterize the I/O module. You have the following options:

Graphical representation of the fieldbus node

Display of the measured values

Settings for the application

Configuration of the I/O module operating modes

Parameterization of module, channel and scaling settings

Calibration of channels and adjustment of analog inputs

Monitoring

WAGO-I/OCHECK

You can obtain the WAGO-I/OCHECK software on a CD under Item No.

759-302. This CD contains all the application program files and an explanation.

You can find a description on the website at www.wago.com

Save all your settings before you begin parameterization!

To be on the safe side, you should always save all of your current settings in a parameter file before you begin parameterization. This allows you to always use the original values should the parameterization be incorrect.

Behavior after overwriting with

WAGO-I/OCHECK

file, the I/O module operates with the WAGO-I/O-

If WAGO-I/OCHECK is used to overwrite a parameterization made with the GSD

CHECK

PROFIBUS/PROFINET Fieldbus Couplers are restarted.

settings until the

After restart, the I/O module is re-parameterized via PROFIBUS/PROFINET using the GSD settings.

To configure the I/O module with WAGO-I/OCHECK , proceed as follows:

1. Open WAGO-I/OCHECK .

2. Left-click on the menu item [Identify].

The node configuration is determined and displayed.

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Commissioning 57

Figure 19: WAGO-I/OCHECK User Interface (Example)

After the node structure has been identified in WAGO-I/OCHECK , it appears in the overview area.

To open specific parameterization dialogs for the 750-1491 I/O Module, proceed as follows:

1. Select the I/O module. The representation of the I/O module is marked.

2. Right-click to open the context menu and select the Settings menu item.

The parameterization dialog appears. This forms the basis for the following explanation.

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7.3.1 Parameterization Dialog

WAGO I/O System 750


The parameterization dialog is divided into the following areas:

Figure 20: I/O Module Parameterization Dialog

1 Title bar with the position and indication of the selected I/O module

2 Information bar including item number, name, version number and version date of the I/O module

3 Buttons

4 Menu

5 Application area with the parameters

6 Status bar

The individual areas are explained in more detail in the following sections.

7.3.1.1 Title Bar

The title bar in the parameterization dialog contains the program icon, the window title and the button for closing the application window.

The window title provides information about the position of the selected I/O module within the fieldbus node used and the item number of the selected

I/O module.

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7.3.1.2 Information Bar

• Item number: 750-1491

• Item description: 2AI Resistor Bridge (Strain Gauge)

• Version: 01.01.xx(xx)

7.3.1.3 Buttons

Table 31: Buttons

Button Function Explanation

Closes the parameterization dialog.

The connection to the I/O module is interrupted.

[Exit]

Commissioning 59

[Open] Opens the dialog for loading a saved parameter file.

[Save]

Opens the dialog for saving parameterization information in a parameter file.

[Read]

Reads the current parameterization from the I/O module.

[Write] Writes the modified parameters to the I/O module.

[Factory

Settings]

Resets all I/O module settings to factory settings

Note : The values for the user calibration are also reset to their default values. Therefore, if you had set your own values previously, they must be modified again and written to the I/O module after this reset.

Tip: Make a note of any value settings before resetting the I/O module.

Briefly deviating measured values when resetting!

When resetting to the factory settings, the I/O module indicates deviating/distorted measured values for a few seconds. Wait 30 seconds before continuing to operate the I/O module!

[Help] Opens an I/O module help dialog.

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7.3.1.4 Menu

WAGO I/O System 750


Via the menu items, select the application area view.

When a menu item is selected, the associated parameters are displayed in the application area:

Table 32: Navigation via the Menu

Menu Item

[Common]

Description

General settings for all inputs of the module

[Input U d

1]

[Input U ref

1]

[Input U d

2]

Settings for U

Settings for U

Settings for U d d

1 input ref

1 input

2 input

[Input U ref

2]

[Scaling]

[Calibration]

Settings for U ref

2 input

Scaling settings for all inputs

Calibration settings for all inputs

7.3.2 Settings via the Menu

Figure 21: “Common” Menu Item

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7.3.2.1 Common

Commissioning 61

Via the [Common] menu item, the following I/O parameters can be set:

Table 33: “Common” Menu Item

Parameter


Settings / Description

The input filter is used to suppress interfering mains frequency signal components. The frequency depends on the application location and can be set with module-level granularity.

10 Hz

50 Hz

60 Hz

*)

200 Hz

400 Hz

The mains frequency is 10 Hz


(e.g., Europe)


(e.g., North America)

The mains frequency is 200 Hz.


(e.g., marine and aerospace)

Filter mode You can choose between 2 filter modes:

In this filter mode, the interference frequency is suppressed by a broadband notch filter, including frequencies in the precise sidebands.

Therefore, there is good interference suppression even at higher frequencies

(> 40 dB, low pass).

However, a 3× conversion time compared to the “fast” filter mode has to be accepted. fast *)

The interference suppression in this filter mode is precisely optimized for the set filter frequency; the attenuation decreases in the sidebands. Higher frequencies are not attenuated as much as in the “precise” filter mode. In return, the conversion time is significantly shorter.

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Table 33: “Common” Menu Item

Parameter

Process image

Settings / Description

In the standard process image, the

Standard *) control/status byte is hidden by the head station and is therefore not visible in the fieldbus process image.

1-channel mode

Extended

On

With the "Extended" setting, the control/status byte is faded in on the fieldbus process image. This means that the diagnostic bits in the status byte can also be evaluated by a higher-level controller.

Note: Changing the setting requires a restart of the node because the process image changes.

Connection of 1 resistor bridge possible.

In this setting the process data length is adjusted. There are 2 instead of 4 inputs available.

The process data length then corresponds to that of the I/O module 750-491, for example.

Note: Changing the setting requires a restart of the node because the process image changes.

Off *)

Connection of 2 resistor bridges possible.

There are 4 inputs available.

*) Factory setting

The settings are transmitted to the I/O module using the [Write] button.

7.3.2.2 Input Settings

Via the menu items [Input U d x] and [Input U ref x] you can access the specific parameters of the respective input.

If you change a value, a pencil symbol appears to the left of the respective parameter and the previously grayed-out menu item [Write] is activated.

Select the [Write] button to save the settings made and transfer them to the I/O module

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Commissioning 63

Figure 22: Menu Item “Input U d x” (Example “U d

1”)

Figure 23: Menu Item “Input U ref x” (Example “U ref

1”)

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Table 34: “Menu Items “Input X”

Parameter

Bridge voltage 1)

Setting Option / Description

This parameter can be used to set the measuring range of the bridge voltage or deactivate the input.

Input deactivated

±15 mV *)

±30 mV

±60 mV

±120 mV

Measuring range selection of the bridge voltage for the input. The input can also be deactivated in this parameter. Then a

0x7FFF is delivered as process value

±240 mV

±360 mV

Reference voltage 2) This parameter can be used to set the measuring range of the reference voltage or deactivate the input.

Smoothing

Number format

Input deactivated

5 V (internal) *)

±5 V (external)

±10 V (external)

±15 V (external)

Measuring range selection of the reference voltage for the input. The input can also be deactivated in this parameter.

Then a 0x7FFF is delivered as process value

This parameter can be used to configure the analog value smoothing.

deactivated *) Smoothing is switched off. weak medium strong

Weak analog value smoothing

Medium analog value smoothing

Strong analog value smoothing

This parameter can be used to configure the representation of the process value on the fieldbus.

Twos

Complement *) Two’s complement representation

Input diagnosis

Sign magnitude Amount/sign representation

This parameter can be used to switch diagnostics on/off.

Off Input diagnosis is switched off.

On *) Input diagnosis is switched on.

Diagnosis: Overflow This parameter can be used to switch diagnostics on/off for an overflow.

Off Overflow diagnosis is switched off.

On *) Overflow diagnosis is switched on.

Diagnosis:

Underflow

This parameter can be used to switch diagnostics on/off for an underflow.

Off

On *)

Underflow diagnosis is switched off.

Underflow diagnosis is switched on.

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Commissioning 65

Table 34: “Menu Items “Input X”

Parameter

Diagnosis:

Measuring range overflow


This parameter can be used to switch diagnostics on/off for a measuring range overflow.

Off

Measuring range overflow diagnosis is switched off.

Diagnosis:

Measuring range underflow

On *)

Measuring range overflow diagnosis is switched on.

This parameter can be used to switch diagnostics on/off for a measuring range underflow.

Off

On *)

Measuring range underflow diagnosis is switched off.

Measuring range underflow diagnosis is switched on.

Diagnosis: Upper user limit value exceeded

This parameter can be used to switch diagnostics on/off for an upper user limit value exceed.

Off

On *)

Diagnosis: upper user limit value exceed diagnosis is switched off.

Diagnosis: upper user limit value exceed diagnosis is switched on.

Diagnosis: Lower user limit value undershot

This parameter can be used to switch diagnostics on/off for a lower user limit value undershot.

Off

Lower user limit value undershot diagnosis is switched off.

On *)

Lower user limit value undershot diagnosis is switched on.

Upper user limit

Lower user limit

[Input field]

−32768 …

32767 *)

[Input field]

−32768

32767

*) …

*) Factory setting

1) setting only for

2) setting only for

“ Input U d x ” menu item

“ Input U ref x ” menu item

The upper user limit value can be entered in the input field.

The lower user limit value can be entered in the input field.

7.3.2.3 Scaling

Under the “Scaling” menu item, you can enable and modify the user scaling for each input. You select the corresponding input via the tabs in the application area.

Factory scaling is always activated according to the measuring range selected.

Enabling user scaling allows gain and offset values to be adjusted

The scaling process is performed on a input basis; therefore, before the save operation, be sure to select the corresponding input.

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Checking/unchecking the box has an immediate effect!

When the box is checked, the setting is written immediately to the I/O module; it is not necessary to click the [Write] button.

Click the [Write] button to save any settings you have made and apply them to the I/O module.

Scaling is saved permanently, i.e. still available after the node is restarted.

Figure 24: “Scaling” Menu Item (Example “Input U d

1”)

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Commissioning 67

Figure 25: “Scaling” Menu Item (Example “Input U ref

1”)

Table 35: “Scaling” Menu Item

Parameter Setting Option / Description

Manufacturer scaling

User scaling

The gain and offset values of the manufacturer scaling are displayed and cannot be changed.

When user scaling is switched on, values for offset and gain can be entered.

The register values can be represented and edited as either decimals or hexadecimals. If user scaling not enabled, the offset and gain values cannot be changed.





Offset [Input field]

User scaling is enabled

User scaling is disabled

Process value

Gain [Input field]

[Output field]

The offset value causes a zero offset of the process value (shift along the Y axis).

The value entered must fall within the range

−32768 ... 32767.

The gain value is applied to the process value as a gain factor.

The value entered must fall within the range

−2.0000 ... 1.9999.

A resolution of 1/16384 has already been taken into account for the decimal input.

The process value can be constant or deliberately kept changeable; it can be represented as a fixed-point number with unit or as a hexadecimal, according to the measurement range.

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Table 35: “Scaling” Menu Item

Parameter

Show values in hexadecimal


The hexadecimal representation can be switched on or off.

 Hexadecimal representation is enabled.

[Area for displaying errors]



Underflow

Overflow



The values are displayed as fixed-point numbers with unit.

Underflow of the measuring range


The field-side input voltage or field-side input resistance is below the measurement range lower limit.

The field-side input voltage or field-side input resistance is above the measurement range upper limit.

Internal Error Internal error present (ADC error)

Additional information on the user scaling

Detailed information about user scaling can be found in Section “Scaling

Measured Values!”

7.3.2.4 Calibration

The I/O module can be recalibrated to correct the effects of long-term drift or to optimize accuracy in a thermally stable state. Each input and measuring range can be calibrated independently.

The calibration is dependent on the voltage range that was previously set for the respective input (see Section “Channel Setting”).

Before calibration, please note the following information:

• For calibration, use a low-noise calibrator with a measurement accuracy that is

10 times higher than that of the device to be calibrated.

• Disconnect all cables (if there are any) from the I/O module to the system.

• Use a separate 24 V power supply for the node.

• Use short shielded cables to connect to the calibrator.

• Calibrate each input separately.

• For an optimal calibration process, the measuring bridge (or a comparable resistor network) should remain connected directly to the I/O module.

The calibration voltages, on the other hand, can be fed in at the bridge.

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Figure 26: “Calibration” Menu Item (Example “Input U d

1”)

Figure 27: “Calibration” Menu Item (Example “Input U ref

1”)

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Table 36: “Calibration” Menu Item

Parameter / Button

[Start Calibration]

Process value

Show values in hexadecimal

[Area for displaying

errors]


Pressing this button starts an automatic assistant with which the entire measuring section can be adjusted to the local conditions.

You will be prompted via a dialog to apply a bridge voltage (input U d x) or a reference voltage (input U ref x).

[Output field] The process value can be constant or deliberately kept changeable; it can be represented as a fixed-point number with unit or as a hexadecimal, according to the measurement range.

Hexadecimal representation can be switched on or off.

 Hexadecimal representation is enabled.



Underflow

Overflow



The values are displayed as fixedpoint numbers with unit.

Underflow of the measuring range


The field-side input voltage or fieldside input resistance is below the measurement range lower limit.

The field-side input voltage or fieldside input resistance is above the measurement range upper limit.

Internal Error Internal error present (ADC error)

Proceed as follows:

1. Select the channel to calibrate by switching to the corresponding tab.

2. Click the [Start Calibration] button.

A dialog opens.

3. Follow the instructions in the dialog.

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Figure 28: “User Calibration” Dialog – Offset Correction

Figure 29: “User Calibration” Dialog – Gain Correction

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For offset and gain correction, arbitrary reference values within the measurement range can be entered as setpoints. Ideally, the reference values should be as close as possible to the lower (offset correction) or upper (gain correction) full scale value.

4. Close the dialog. This saves the calibration instructions directly.

Therefore, it is not necessary to click the [Write] button.

After the calibration, the process values will correspond to the reference values over the entire range.

The measuring circuits can be calibrated in the same way, independently of each other.

The calibration process is performed on a input basis; therefore, before the calibration process, be sure to select the corresponding input.

5. Repeat the calibration for each input if necessary.

Note: If the calibration fails, the original calibration values are restored

Additional information on calibration

Detailed information about calibratiob can be found in Section “Calibrating

Measured Values!”

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7.4 Configuration and Parameterization with e!COCKPIT

The 750-1491 I/O module is supported by the e!

COCKPIT commissioning tool starting with version 1.8.0.0 – see manual “2759-0101 e!

COCKPIT ,” Section

“Operating.”

7.5 Configuration and Parameterization via GSD File

The I/O module can also be parameterized via PROFIBUS and PROFINET device description (GSD file).

Behavior after Overwriting with

If

WAGO-I/O-

CHECK

WAGO-I/OCHECK

!

is used to overwrite a parameterization made with the

GSD file, the I/O module operates with the

WAGO-I/O-

PROFIBUS/PROFINET Couplers are restarted.

CHECK settings until the

After restart, the I/O module is re-parameterized via PROFIBUS/PROFINET using the GSD settings.

7.5.1 750-1491 (2AI Resistor Bridge (Strain Gauge))

Configuration

7.5.1.1 PROFIBUS DP Fieldbus Couplers 750-333(/0xx-000)

When the aforementioned PROFIBUS DP fieldbus devices are used, the process image size is configured by selecting the corresponding GSD entry.

Table 37: PROFIBUS DP Configuration

GSD Entry

PA-Length/

[Byte]

Sub Module I O Module

750-1491 2 Resistor bridges/SG

750-1491 2 Resist. bridges/SG RA

750-1491 1 Resistor bridge/SG

750-1491 1 Resistor bridge/SG RA n/a

8

12

4

6 n/a

12 n/a

6

Data Type

INT16

{UINT8, INT16}

INT16

{UINT8, INT16}

Inst.

4

2

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7.5.1.2 PROFINET IO Fieldbus Couplers 750-375(/025-000), 750-377(/025-000)

When the aforementioned PROFINET IO fieldbus couplers are used, the process image size is configured by selecting the corresponding GSD entry.

Table 38: PROFINET IO Configuration

Module

750-1491

2 Resistor bridges

(strain gauge)

GSD Entry

Sub Module

4AI, INT16[4] I

4AI, {UINT8, INT16}[4] I/O

2AI, INT16[2] I

2AI, {UINT8, INT16}[2] I/O

PA Length/

[Byte]

I O

8

12

4

6

Data Type

Module n/a INT16

12 {UINT8, INT16} n/a

6

INT16

{UINT8, INT16}

Inst.

Sub

Module

4

2

7.5.2 750-1491 (2AI Resistor Bridge (Strain Gauge))

Parameterization


On the PROFIBUS DP fieldbus devices, the I/O module can be provided with operating parameters using the PROFIBUS GSD files under the category

“Device-Specific Parameters”.

Figure 30: Example “Device-Specific Parameters” Dialog with PROFIBUS DP

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Commissioning 75


On the PROFINET IO fieldbus couplers, the I/O module can be provided with operating parameters using the PROFINET GSD file under the category “Specific

Module/Channel Parameters”.

Figure 31: Example “Specific Module/Channel Parameters” Dialog with PROFINET IO

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7.5.2.3 All PROFIBUS DP and PROFINET IO Fieldbus Couplers

The following association applies to the parameters of the I/O module in connection with the use of WAGO-I/OCHECK as well when using PROFIBUS

DP and PROFINET IO fieldbus devices.

Table 39: Device-Specific Parameters” or “Specific Module/Channel Parameters”

GSD File

Name


[I/O module]

Filter mode

[I/O module]

Bridge voltage

[U d x (x = 1, 2)]

Reference voltage

[U ref x (x = 1, 2)]

Smoothing

[U d x, U ref x (x = 1, 2)]

Number format

[U d x, U ref x (x = 1, 2)]

*) Factory setting

Value

WAGO-I/O-

Name

CHECK

10 Hz

50 Hz *)

60 Hz

200 Hz

400 Hz precise fast *)

Input deactivated

+/-15 mV *)

+/-30 mV

+/-60 mV

+/-120 mV

+/-240 mV

+/-360 mV

Input deactivated

5 V (internal) *)

+/-5 V (external)

+/-10 V (external)

+/-15 V (external) deactivated *)


[Common]

Filter mode

[Common]

[Input U d

Bridge voltage x (x = 1, 2)]

Reference voltage

[Input U ref x (x = 1, 2)] weak medium strong

Twos Complement

Sign magnitude

Smoothing

[Input U

[Input U d d x, U x, U ref ref x (x = 1, 2)]

*) Number format x (x = 1, 2)]

Value

10 Hz

50 Hz *)

60 Hz

200 Hz

400 Hz precise fast *)

Input deactivated

±15 mV *)

±30 mV

±60 mV

±120 mV

±240 mV

±360 mV

Input deactivated

5 V (internal) *)

±5 V (external)

±10 V (external)

±15 V (external) deactivated *) weak medium strong

Twos Complement

Sign magnitude

*)


PROFIBUS DP fieldbus couplers allow channel-specific behavior parameterization for diagnostics.

Table 40: General Module/Channel Parameters

GSD File

Name

Diagnosis

[U d x, U ref x (x = 1, 2)]

Value disabled *) enabled

WAGO-I/OCHECK

Selection Box

Input diagnosis

[Input U d x, U ref x

(x = 1, 2)]

*) Factory setting

Value

Off

On *)

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Commissioning 77


PROFINET IO fieldbus couplers allow (sub)module-specific and channel-specific behavior parameterization for diagnostics, as well as additional channel-specific settings.

Table 41: Specific Module/Channel Parameters

GSD File

Name

Channel diagnosis

[U d x, U ref x (x = 1, 2)]

Value

0 (false) *)

1 (true)

WAGO-I/OCHECK

Selection Box

Input diagnosis

[Input U d x, U ref x (x = 1, 2)]

Value

Diagnosis:


[U d x, U ref x (x = 1, 2)]

0 (false)

1 (true) *)

Diagnosis: Measuring range underflow [Input

U d x, U ref x (x = 1, 2)]

Off

On *)

Off

On *)

Diagnosis: Underflow

[U d x, U ref x (x = 1, 2)]

0 (false)

1 (true) *)

0 (false)

Diagnosis: Underflow


Off

On *)

Off Diagnosis:

Measuring range overflow [U d x, U ref x (x

= 1, 2)]

1 (true) *)

Diagnosis: Measuring range overflow


On *)

Diagnosis: Overflow

[U d x, U ref x (x = 1, 2)]

Process alarm:

Lower user limit value undershot

[U d x, U ref x (x = 1, 2)]

Lower user limit

[U d x, U ref x (x = 1, 2)]

Process alarm:

Upper user limit value exceeded

[U d x, U ref x (x = 1, 2)]

Upper user limit

[U d x, U ref x (x = 1, 2)]

0 (false)

1 (true) *)

0 (false)

1 (true) *)

Diagnosis: Overflow

[Input U

Diagnosis: Lower user limit value undershot

[Input U d d x, U x, U ref ref x (x = 1, 2)] x (x = 1, 2)]

-32768 *) … 32767 Lower user limit d x, U ref x (x = 1, 2)]

0 (false)

1 (true) *)

Diagnosis: Upper user limit value exceeded


-32768 *)

Off

On

On

*)

Off

… 32767

Off

On

*)

*)

User scaling

[U d x, U ref x (x = 1, 2)]

-32768 … 32767 *) Upper user limit d x, U ref x (x = 1, 2)] deactivated *) activated

User scaling


-32768 … 32767 *)

Checkbox deactivated *)

Checkbox activated

Offset

[U d x, U ref x (x = 1, 2)]

Gain

[[U d x, U ref x (x = 1, 2)]

-32768 … 0

32767

-32768 … 16384

32767

*) …

*) …

Offset

[Input U d x, U ref x (x = 1, 2)] -32768 … 0

Gain


*) Factory setting

**) The resolution of 1/16384 is already included in WAGO-I/OCHECK .

*) … 32767

-2.0000 … 1.0000

… 1.9999

**)

*)

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78 Scaling Measured Values

8

WAGO I/O System 750


Scaling Measured Values

User scaling serves to adjust the process values.

When user scaling is used, the required accuracy of the process value resolution is changed, but not fundamentally limited.

User scaling is optional.

The values for “Gain” and “Offset” are required in order to perform user scaling.

The scaling gain is the gain factor. The scaling offset is the offset on the y axis.

When these two values are input, the result is a scaled process value.

The following general scaling equation applies: 𝑦𝑦 2 = 𝑦𝑦 1 × �

𝐺𝐺𝐺𝐺𝐺𝐺𝐺𝐺 [ 𝑟𝑟𝑟𝑟𝑟𝑟𝐺𝐺𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟 𝑐𝑐𝑐𝑐𝐺𝐺𝑟𝑟𝑟𝑟𝐺𝐺𝑟𝑟 ]

16384

� + 𝑂𝑂𝑂𝑂𝑂𝑂𝑟𝑟𝑟𝑟𝑟𝑟

The variables have the following meanings:

Table 42: Variable Legend – Scaling Measured Values

Variable Meaning/Function y2 y1

Scaled process value

Unscaled process value

Gain [register content] Scaling gain (gain factor)

Offset Scaling offset

16384 Constants (1/16384)

The y1 value (unscaled process value) serves as the input value for the user scaling. If user scaling is switched off, the y1 value is carried over unchanged to y2.

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9

Calibrating Measured Values 79

Calibrating Measured Values

Manufacturer calibration serves to compensate for tolerances in electrical components of the I/O module.

User calibration allows you to compensate for the tolerances of electronic components of both the I/O module and connected resistor bridges and to take into account factors such as component age and different surrounding air temperatures at the installation site.

User calibration required for each input!

To achieve the greatest possible measurement accuracy for each input, you must calibrate each input individually!

Preset values can be optimized!

Approximate default values for the respective measurement range are already stored by default. However, these values can be optimized for the specific site!

The resulting calibration values are stored permanently in the I/O module.

Each supported measurement range has its own storage space available.

9.1 Calibration when Operating with an External Power

Supply

When operating with an external power supply , the measurement input U d

is referenced internally to a defined, internal potential. In contrast, the measurement input U ref

is “floating”.

This is necessary in normal operation (i.e., when connecting a resistor bridge), but it may cause problems with calibration – due to the lack of referencing to a voltage potential, the measured values react very sensitively to interference and fluctuate.

For an optimal calibration process, the measuring bridge (or a comparable resistor network) should remain connected directly to the I/O module. The calibration voltages, on the other hand, can be fed in at the bridge.

Use the connection type “4-Wire Mode (External Power Supply)” for the calibration.

For the I/O module, WAGO offers the option of performing the calibration using the WAGO-I/OCHECK calibration dialog.

To calibrate the I/O module, proceed as follows:

1. Connect a measuring bridge (or a comparable resistor network) directly to the I/O module.

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2. To calibrate the bridge voltage U d

(Input 1), connect a calibrator directly to the measuring bridge (see connection example in Figure “Calibration of the

Bridge Voltage U d

when Operating with an External Power Supply

(Example for Channel 1)”).

Figure 32: Calibration of the Bridge Voltage U d

Supply (Example for Channel 1)

when Operating with an External Power

3. Use WAGO-I/OCHECK to calibrate the equipment via this calibrator.

4. Remove the calibrator.

5. To calibrate the reference voltage Uref (Input 2), connect a calibrator directly to the measuring bridge (see connection example in Figure

“Calibration of the Reference Voltage U ref

Power Supply (Example for Channel 1)”).

when Operating with an External

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Figure 33: Calibration of the Reference Voltage U ref


when Operating with an External Power



8. Proceed accordingly for channel 2.

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9.2 Calibration when Operating with an Internal Power

Supply

Proceed similarly for operation with an internal power supply . To feed in the

U d

or U ref

calibrator voltage, however, you have to disconnect the +U v

line between the I/O module and the measuring bridge. Otherwise the internal power supply U v

would be short-circuited with the calibrator and there would be a risk of damage. In operation with an internal power supply, the two measurement inputs

Uref and U d

are only referenced via the internal power supply U the line from –U v

to the measuring bridge must remain. v

. For this reason,

To calibrate the I/O module, proceed as follows:

1. Connect a measuring bridge (or a comparable resistor network) directly to the I/O module.

2. Disconnect the +U v

line between the I/O module and the measuring bridge.

3. To calibrate the bridge voltage U

Bridge Voltage U d for Channel 1)”). d

(Input 1), connect a calibrator directly to the measuring bridge (see connection example in Figure “Calibration of the

when Operating with an Internal Power Supply (Example



when Operating with an Internal Power



6. To calibrate the reference voltage U ref

(Input 2), connect a calibrator directly to the measuring bridge (see connection example in Figure “Calibration of the Reference Voltage U ref

when Operating with an Internal Power Supply

(Example for Channel 1)”).

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when Operating with an Internal Power



9. Restore the connection to the previously disconnected +U v

line.

10. Proceed accordingly for channel 2.

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10 Diagnostics

WAGO I/O System 750


10.1 Behavior of the I/O Module in the Event of Error

The behavior of the I/O module if a diagnosis is present depends on whether the various parameters for monitoring are switched on or off.

You can activate or deactivate these diagnostics separately in WAGO-I/O-

CHECK (see Section “Commissioning” > … > “Parameterization with WAGO-I/O-

CHECK ”).

The I/O module only ever allows one error to be indicated. A dedicated bit in the status byte is assigned to each error. The associated status bit is set if an error status is detected. Some errors cause multiple error statuses to occur.

This is why error statuses are given priority levels.

In the event that several errors are present, the error with the highest priority will always be indicated.

The following priority levels apply:

Table 43: Priority Levels of Diagnostic Functions

Priority Level Diagnostic Function

High Overflow

High

Medium

Medium

Low

Low

Underflow



Violation of lower user limiting value (user underrange)

Violation of upper user limiting value (user overrange)

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Diagnostics 85

Table 44: Behavior of the I/O Module in the Event of Overflow/Underflow

Overflow/

Underflow

Monitoring *)

Underrange/

Overrange

Monitoring *)

Behavior of the I/O Module in the Event of Overflow/Underflow

Off Off

• The upper measurement range value is output as a process value

• No change to the status byte

• Error LED does not light up

Off

On

On

Off

• The upper measurement range value is output as a process value

• Error bit is set

(bit 0: underrange or bit 1: overrange)

• General error (bit 6: general error) is set

• Error LED lights up

• Process value is saturated


(bit 4: underflow or bit 5: overflow)



*)

On On

• Process value is saturated


(bit 4: underflow or bit 5: overflow)



The different types of monitoring must be enabled/disabled separately.

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Table 45: Behavior of the I/O Module in the Event of Range Violation

Overflow/

Underflow

Monitoring *)

Underrange/

Overrange

Monitoring *)

Behavior of the I/O Module in the Event of Range Violation

Off Off

• The measured value is output as a process value outside the specified range



Off

On

On

Off




• General error is set

(bit 6: general error)





On On




• General error is set

(bit 6: general error)

*)


The different types of monitoring must be enabled/disabled separately.

The limiting values for detecting a measurement underrange/overrange or an overflow/underflow, as well as the process values that are output, are specified in the process value tables (see Section “Process Image”).

Note how long diagnostics are indicated!

A diagnosed error status is indicated for at least 200 ms even if the detected error status is no longer present in this period. If a higher-priority error status occurs in this period, the higher-priority error status is displayed for 200 ms, and the lower-priority error status is lost!

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Diagnostics 87

No monitoring of the 24 V field voltage!

A diagnosis of “Field voltage too low / not available” is not possible.

10.2 Diagnostics via LED Indicators

The indicators of the I/O module provide information about possible states and cases of error. The tables below contain the interpretations of the signals:

Table 46: Signal Evaluation for Each Input – “Function U d

Not ready for operation

X” (LED 1 or 3)

Status LED State Possible Interpretation

Off

Green

Local bus communication absent or interrupted

Input deactivated

Operational readiness and uninterrupted local bus communication

Tabelle 47: Signal Evaluation for Each Input – “Function U ref

X” (LED 9 or 11)

Zustand Status-LED Mögliche Deutung

Off

Not ready for operation

Local bus communication absent or interrupted

Input deactivated

Green

Off

Operational readiness and uninterrupted local bus communication

Table 48: Signal Evaluation for Each Input – “Error U d

X” (LED 2 or 4)

Error LED State Possible Interpretation

No error

Input deactivated

Diagnostics deactivated

Underflow

Red

Overflow



Internal error

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Table 49: Signal Evaluation for Each Input – “Error U ref

X” (LED 10 or 12)

Error LED State

Off

Possible Interpretation

No error

Input deactivated

Diagnostics deactivated

Underflow

Overflow

Red Measurement underrange


Internal error

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Use in Hazardous Environments 89

11 Use in Hazardous Environments

The WAGO I/O SYSTEM 750 (electrical equipment) is designed for use in Zone

2 hazardous areas and shall be used in accordance with the marking and installation regulations.

The following sections include both the general identification of components

(devices) and the installation regulations to be observed. The individual subsections of the “Installation Regulations” section must be taken into account if the I/O module has the required approval or is subject to the range of application of the ATEX directive.

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11.1 Marking Configuration Examples

11.1.1 Marking for Europe According to ATEX and IECEx

Figure 36: Marking Example per ATEX and IECEx

Figure 37: Text Detail – Marking Example per ATEX and IECEx

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Table 50: Description of the Marking Example per ATEX and IECEx

Marking Text

TUEV 07 ATEX 554086 X

IECEx TUN 09.0001 X

Description

Approving authority or certificate numbers

Dust

II

3 D

Ex

Device group: All except mining

Device category 3 (Zone 22)

Explosion protection mark tc

IIIC

T135°C

Protection type: Protection by enclosure

Dust group: Explosive dust atmosphere

Maximum surface temperature of the enclosure

(no dust bin)

Level of equipment protection (EPL) Dc

Mining

I

M2

Ex d

I

Mb

Device group: Mining

Device category: High degree of safety

Explosion protection mark

Protection type: Pressure-tight encapsulation

Electrical devices in potentially explosive mines

Level of equipment protection (EPL)

Gases

II

3 G

Ex nA

IIC

T4

Gc


Device category 3 (Zone 2)


Protection type: Non-sparking equipment

Gas group: Explosive gas atmosphere

Temperature class: Max. surface temperature

135 °C


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Figure 38: Marking Example of an Approved I/O Module Ex i per ATEX and IECEx

Figure 39: Text Detail – Marking Example of an Approved I/O Module Ex i per ATEX and IECEx

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Table 51: Description of the Marking Example of an Approved I/O Module Ex i per ATEX and IECEx

Marking Text

TUEV 12 ATEX 106032 X

IECEx TUN 12

Dust

II

0039 X

Description

Approving authority or certificate numbers


3 (1) D

Ex tc

[ia Da]

Device category 3 (Zone 22) that contain safety devices for Category 1 (Zone 20) devices


Protection type: Protection by enclosure

IIIC

T135°C

Protection type and equipment protection level

(EPL): Associated equipment with intrinsically safe circuits for Zone 20

Dust group: Explosive dust atmosphere

Max. surface temperature of the enclosure

(no dust bin)

Level of equipment protection (EPL) Dc

Mining

I

M2 (M1)

Device group: Mining

Device category: High level of safety with circuits that offer a very high level of safety

Ex d

[ia Ma]

I

Mb

Gases

II

3 (1) G


Protection type: Pressure-tight encapsulation


(EPL): Associated equipment with intrinsically safe circuits

Electrical devices in potentially explosive mines



Ex ec

[ia Ga]

Device category 3 (Zone 2) that contain safety devices for Category 1 (Zone 0) devices


Protection type: Increased safety

IIC

T4

Gc


(EPL): Associated equipment with intrinsically safe circuits for Zone 0

Gas group: Explosive gas atmosphere

Temperature class: Max. surface temperature 135

°C


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11.1.2 Marking for the United States of America (NEC) and Canada

(CEC)

Figure 40: Marking Example According to NEC

Figure 41: Text Detail – Marking Example According to NEC 500

Table 52: Description of Marking Example According to NEC 500

Marking

CL I

Description

Explosion protection (gas group)

DIV 2

Grp. A B C D op temp code T4

Area of application

Explosion group (gas group)

Temperature class

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Figure 42: Text Detail – Marking Example for Approved I/O Module Ex i According to NEC 505

Table 53: Description of Marking Example for Approved I/O Module Ex i According to NEC 505

Marking

CI I,

Description

Explosion protection group

Zn 2

AEx nA

[ia Ga]

Area of application


Type of protection

Type of protection and equipment protection level (EPL): Associated apparatus with intrinsic safety circuits for use in Zone 20

IIC

T4

Gc

Group

Temperature class

Equipment protection level (EPL)

Figure 43: Text Detail – Marking Example for Approved I/O Module Ex i According to NEC 506

Table 54: Description of Marking Example for Approved I/O Module Ex i According to NEC 506

Marking

CI I,

Zn 2

Description

Explosion protection group

Area of application

AEx nA

[ia IIIC]


Type of protection


IIC

T4

Gc

Group

Temperature class


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Figure 44: Text Detail – Marking Example for Approved I/O Module Ex i According to CEC 18 attachment J

IIC

T4

Gc

X

Table 55: Description of Marking Example for Approved I/O Module Ex i According to CEC 18 attachment J

Marking

Dust

Ex

Description

Explosion protection mark nA

[ia IIIC]

IIC

T4

Type of protection


Group

Temperature class

Equipment protection level (EPL) Gc

X

Gases

Ex nA

[ia Ga]

Symbol used to denote specific conditions of use


Type of protection


Group

Temperature class


Symbol used to denote specific conditions of use

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11.2 Installation Regulations


For the installation and operation of electrical equipment in hazardous areas, the valid national and international rules and regulations which are applicable at the installation location must be carefully followed.

11.2.1 Special Notes including Explosion Protection

The following warning notices are to be posted in the immediately proximity of the

WAGO I/O SYSTEM 750 (hereinafter “product”):

WARNING – DO NOT REMOVE OR REPLACE FUSED WHILE ENERGIZED!

WARNING – DO NOT DISCONNECT WHILE ENERGIZED!

WARNING – ONLY DISCONNECT IN A NON-HAZARDOUS AREA!

Before using the components, check whether the intended application is permitted in accordance with the respective printing. Pay attention to any changes to the printing when replacing components.

•

•

•

•

The product is an open system. As such, the product must only be installed in appropriate enclosures or electrical operation rooms to which the following applies:

•

Can only be opened using a tool or key

Inside pollution degree 1 or 2

In operation, internal air temperature within the range of 0 °C ≤ Ta ≤ +55 °C or −20 °C ≤ Ta ≤ +60 °C for components with extension number …/025-xxx or −40 °C ≤ Ta ≤ +70 °C for components with extension number …/040-xxx

Minimum degree of protection: min. IP54 (acc. to EN/IEC 60529)

•

For use in Zone 2 (Gc), compliance with the applicable requirements of the standards EN/IEC/ABNT NBR IEC 60079-0, -7, -11, -15

For use in Zone 22 (Dc), compliance with the applicable requirements of the standards EN/IEC/ABNT NBR IEC 60079-0, -7, -11, -15 and -31

•

•

For use in mining (Mb), minimum degree of protection IP64 (acc. EN/IEC

60529) and adequate protection acc. EN/IEC/ABNT NBR IEC 60079-0 and

-1

Depending on zoning and device category, correct installation and compliance with requirements must be assessed and certified by a “Notified

Body” (ExNB) if necessary!

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Explosive atmosphere occurring simultaneously with assembly, installation or repair work must be ruled out. Among other things, these include the following activities

•

•

•

•

Insertion and removal of components

Connecting or disconnecting from fieldbus, antenna, D-Sub, ETHERNET or

USB connections, DVI ports, memory cards, configuration and programming interfaces in general and service interface in particular:

• Operating DIP switches, coding switches or potentiometers

• Replacing fuses

Wiring (connecting or disconnecting) of non-intrinsically safe circuits is only permitted in the following cases

The circuit is disconnected from the power supply.

The area is known to be non-hazardous.

Outside the device, suitable measures must be taken so that the rated voltage is not exceeded by more than 40 % due to transient faults (e.g., when powering the field supply).

Product components intended for intrinsically safe applications may only be powered by 750-606 or 750-625/000-001 bus supply modules.

Only field devices whose power supply corresponds to overvoltage category I or

II may be connected to these components.

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11.2.2 Special Notes Regarding UL Hazardous Location

For UL Hazardous Location acc. to UL File E198726, the following additional requirements apply:

•

•

•

•

•

Use in Class I, Division 2, Group A, B, C, D or non-hazardous areas only

ETHERNET connections are used exclusively for connecting to computer networks (LANs) and may not be connected to telephone networks or telecommunication cables

WARNING – The radio receiver module 750-642 may only be used to connect to external antenna 758-910!

WARNING – Product components with fuses must not be fitted into circuits subject to overloads!

These include, e.g., motor circuits.

WARNING – When installing I/O module 750-538, “Control Drawing No.

750538” in the manual must be strictly observed!

Additional Information

Proof of certification is available on request.

Also take note of the information given on the operating and assembly instructions.

The manual, containing these special conditions for safe use, must be readily available to the user.

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12 Service

WAGO I/O System 750


12.1 Factory Setting (Default Values)

The following values in the registers and parameters are factory settings:

Table 56: Factory Settings – Default Values

Process image


Filter mode

Standard

50 Hz fast

1-channel mode

Signal voltage U

(Bridge voltage) d

Signal voltage U ref

(Reference voltage)

Smoothing

Number format

Off

±15mV

5 V (internal) deactivated

Twos Complement

Input diagnosis

Diagnosis: Overflow

Diagnosis: Underflow activated activated activated

Diagnosis: Measuring range overflow activated

Diagnosis: Measuring range underflow activated

Diagnosis: activated

Upper user limit value exceeded

Diagnosis:

Lower user limit value undershot

Upper user limit activated

32767

Lower user limit

User scaling

User scaling

User scaling

– Offset

– Gain

− 32768 deactivated

0

16384

Briefly deviating measured values when resetting!

When resetting to the factory settings, the I/O module indicates deviating/distorted measured values for a few seconds.

Wait 30 seconds before continuing to operate the I/O module!

12.2 Firmware Update/Downgrade

You can update firmware on the Series 750 I/O Modules with the software

“WAGO I/O-Update 750.” The I/O modules can be updated via the service

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Service 101 interface or, for ETHERNET-based fieldbuses, via the fieldbus connection on the fieldbus coupler/controller.

Observe the following information:

Do Not Switch Off the I/O Module!

Interrupting the update process can damage the I/O module.

Do not remove the I/O module during the update process. Do not interrupt the power supply!

•

•

•

Ensure that communication with the fieldbus coupler/controller is not interrupted during the update process.

Any PLC application running on the controller must be stopped before the update process.

Before an update via the service interface, disconnect the fieldbus cable from the fieldbus coupler/controller.

Do not close the software during the update.

Only run the software from a local hard disk.

•

•

Additional Information from WAGO Support!

Additional information about the software “WAGO I/O-Update 750” is available through WAGO Support.

Firmware Downgrade

Contact WAGO Support to discuss whether a firmware downgrade is possible in your situation.

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102 Service

12.3 Recalibration

WAGO I/O System 750


Calibrating the I/O module may provide the process value accuracy required by the application.

It may be necessary to perform a recalibration in order to maintain the accuracy despite aging of individual components of the line. The operator of the equipment must determine the intervals at which such recalibration is to be performed.

The corresponding sections on the topic of calibration explain how the recalibration is to be performed with the help of the various commissioning tools.

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Strain Gauge Application Example 103

12.4 WAGO UII (Unique Item Identifier)

Each I/O module (750-1491) is provided with a unique WAGO UII (“Unique Item

Identifier”).

Application example:

The I/O module can be permanently assigned a calibration certificate via this UII.

13 Strain Gauge Application Example

In the test setup, a load cell is connected to the I/O module (e.g., Channel 1).

The load cell has a 5 V supply voltage (+U

V

1, −U

V

1) from the I/O module.

The reference voltage (U ref

) is detected by the U ref bridge voltage (U d

) by the U d

input (U d

1, −U d

1).

input (+U ref

1, −U ref

1) and the

In this example, the reference voltage is measured by the “5 V (internal)” setting and the strain gauge bridge voltage by the “±15 mV” setting.

Sample equation:

Technical data of the load cell used : e.g., 5 kg equals

2 𝑚𝑚𝑚𝑚 𝑚𝑚

The weight is calculated as follows:

𝑟𝑟

=

�

�

𝑈𝑈𝑈𝑈

2 𝑚𝑚𝑚𝑚

𝑈𝑈𝑈𝑈𝑈𝑈𝑈𝑈

1 𝑚𝑚

�

�

∗

5

𝑘𝑘𝑟𝑟

By

𝑈𝑈𝑈𝑈

=

𝐼𝐼1

𝐷𝐷1𝐷𝐷0

25000

∗

15

𝑚𝑚𝑚𝑚

and

𝑈𝑈𝑟𝑟𝑟𝑟𝑂𝑂

=

𝐼𝐼2

𝐷𝐷1𝐷𝐷0

25000

∗

5

𝑚𝑚

is

𝑟𝑟

=

𝐼𝐼1

𝐷𝐷1𝐷𝐷0

𝐼𝐼2

𝐷𝐷1𝐷𝐷0

∗

7.5

𝑘𝑘𝑟𝑟

(standardization to 25000, 15 mV ≙ 25000)

(standardization to 25000, 5 V ≙ 25000)

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104 List of Figures WAGO I/O System 750


List of Figures

Figure 1: View ....................................................................................................21

Figure 2: Data Contacts .....................................................................................22

Figure 3: Power Jumper Contacts ......................................................................23

Figure 4: Push-in CAGE CLAMP ® Connectors ...................................................25

Figure 5: Display Elements.................................................................................26

Figure 6: Schematic Diagram .............................................................................27

Figure 7: Calculation Process – Process Value to Measured Value ...................37

Figure 8: Inserting I/O Module (Example) ...........................................................46

Figure 9: Snap the I/O Module into Place (Example) ..........................................46

Figure 10: Removing the I/O Module (Example) .................................................47

Figure 11: Connecting a Conductor to a Push-in CAGE CLAMP ® ......................49

Figure 12: Connection Example – 6-Wire Operation (4 wires including bridge supply) ......................................................................................................50

Figure 13: Connection Example – 4-Wire Operation with Internal Supply ...........51

Figure 14: Connection Example – 4-Wire Operation with External Supply ..........51


(External Power Supply)............................................................................52

Figure 16: Wiring Examples for Calibration of the Reference Voltage

U ref

(External Power Supply) .....................................................................52


(Internal Power Supply) .............................................................................53

Figure18: Wiring Examples for Calibration of the Reference Voltage U ref

(Internal Power Supply) .............................................................................53

Figure 19: WAGO-I/OCHECK User Interface (Example) ...................................57

Figure 20: I/O Module Parameterization Dialog ..................................................58

Figure 21: “Common” Menu Item .......................................................................60

Figure 22: Menu Item “Input U d x” (Example “U d

1”) .............................................63

Figure 23: Menu Item “Input U ref x” (Example “U ref

1”) ...........................................63

Figure 24: “Scaling” Menu Item (Example “Input U

Figure 25: “Scaling” Menu Item (Example “Input U

d

1”) .......................................66

ref

1”) ......................................67

Figure 26: “Calibration” Menu Item (Example “Input U d

Figure 27: “Calibration” Menu Item (Example “Input U ref

1”) ..................................69

1”) .................................69

Figure 28: “User Calibration” Dialog – Offset Correction .....................................71

Figure 29: “User Calibration” Dialog – Gain Correction .......................................71

Figure 30: Example “Device-Specific Parameters” Dialog with PROFIBUS DP ..74

Figure 31: Example “Specific Module/Channel Parameters” Dialog with

PROFINET IO ...........................................................................................75


when Operating with an

External Power Supply (Example for Channel 1) .......................................80


when Operating with an External Power Supply (Example for Channel 1) ..................................81


when Operating with an

Internal Power Supply (Example for Channel 1) ........................................82


when Operating with an Internal Power Supply (Example for Channel 1) ...................................83

Figure 36: Marking Example per ATEX and IECEx ............................................90

Figure 37: Text Detail – Marking Example per ATEX and IECEx ........................90

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List of Figures 105

Figure 38: Marking Example of an Approved I/O Module Ex i per ATEX and

IECEx........................................................................................................92

Figure 39: Text Detail – Marking Example of an Approved I/O Module Ex i per ATEX and IECEx ................................................................................92

Figure 40: Marking Example According to NEC..................................................94

Figure 41: Text Detail – Marking Example According to NEC 500 ......................94

Figure 42: Text Detail – Marking Example for Approved I/O Module Ex i

According to NEC 505 ...............................................................................95


According to NEC 506 ...............................................................................95


According to CEC 18 attachment J ...........................................................96

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106 List of Tables WAGO I/O System 750


List of Tables

Table 1: Number Notation ..................................................................................10

Table 2: Font Conventions .................................................................................10

Table 3: Compatibility List 750-1491 ..................................................................19

Table 4: Legend for Figure “View” ......................................................................21

Table 5: Legend for Figure “Power Jumper Contacts” ........................................23

Table 6: Legend for Figure “Push-in CAGE CLAMP ® Connectors” .....................25

Table 7: Legend for Figure “Display Elements”...................................................26

Table 8: Technical Data .....................................................................................28

Table 9: Technical Data ‒ Field Wi ring ...............................................................29

Table 10: Technical Data – Power Jumper Contacts ..........................................29

Table 11: Technical Data – Data Contacts .........................................................29

Table 12: Technical Data – Climatic Environmental Conditions ..........................29

Table 13: Process Image (“Standard”) ...............................................................33

Table 14: Process Image (“Extended”) ...............................................................33

Table 15: Process Image (“Standard”) in 1-Channel Mode .................................34

Table 16: Process Image (“Extended”) in 1-Channel Mode ................................34

Table 17: Control Byte ........................................................................................34

Table 18: Status Byte .........................................................................................35

Table 19: Overview of Signal Voltages ...............................................................36

Table 20: SG Bridge Voltage Settings U d

(±15 mV) ............................................39



(±30 mV) ............................................39

(±60 mV) ............................................40




(±120 mV) ..........................................40

(±240 mV) ..........................................41

(±360 mV) ..........................................41

Table 26: SG Reference Voltage Settings U ref

(+5 V, internal) ............................42


(±5 V, external) ...........................42


(±10 V, external) .........................43


(±15 V, external) .........................43

Table 30: Settings Using Tools ...........................................................................55

Table 31: Buttons ...............................................................................................59

Table 32: Navigation via the Menu .....................................................................60

Table 33: “Common” Menu Item .........................................................................61

Table 34: “Menu Items “Input X” .........................................................................64

Table 35: “Scaling” Menu Item ...........................................................................67

Table 36: “Calibration” Menu Item ......................................................................70

Table 37: PROFIBUS DP Configuration .............................................................73

Table 38: PROFINET IO Configuration ..............................................................74

Table 39: Device-Specific Parameters” or “Specific Module/Channel

Parameters” ..............................................................................................76

Table 40: General Module/Channel Parameters ................................................76

Table 41: Specific Module/Channel Parameters .................................................77

Table 42: Variable Legend – Scaling Measured Values .....................................78

Table 43: Priority Levels of Diagnostic Functions ...............................................84

Table 44: Behavior of the I/O Module in the Event of Overflow/Underflow ..........85

Table 45: Behavior of the I/O Module in the Event of Range Violation ................86

Table 46: Signal Evaluation for Each Input – “Function U d

X” (LED 1 or 3) ..........87

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List of Tables 107

Tabelle 47: Signal Evaluation for Each Input – “Function U

Table 48: Signal Evaluation for Each Input – “Error U

Table 49: Signal Evaluation for Each Input – “Error U

d ref

X” (LED 9 or 11) ...87

X” (LED 2 or 4) ...............87

ref

X” (LED 10 or 12) ..........88

Table 50: Description of the Marking Example per ATEX and IECEx .................91

Table 51: Description of the Marking Example of an Approved I/O Module Ex i per ATEX and IECEx ................................................................................93

Table 52: Description of Marking Example According to NEC 500 .....................94

Table 53: Description of Marking Example for Approved I/O Module Ex i

According to NEC 505 ...............................................................................95


According to NEC 506 ...............................................................................95


According to CEC 18 attachment J ...........................................................96

Table 56: Factory Settings – Default Values ..................................................... 100

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WAGO Kontakttechnik GmbH & Co. KG

Postfach 2880 • D - 32385 Minden

Hansastraße 27 • D - 32423 Minden

Phone:

Fax:

E-Mail:

Internet:

+49 571 887 – 0

+49 571 887 – 844169 [email protected] www.wago.com

WAGO 2-Channel Analog Input for Resistor Bridges Manual

Manual

WAGO I/O System 750

2AI Resistor Bridge (Strain Gauge)

2-Channel Analog Input for Resistor Bridges

(Strain Gauge)

Table of Contents

1

Notes about this Documentation

1.1 Validity of this Documentation

1.2 Copyright

1.3 Symbols

1.4 Number Notation

1.5 Font Conventions

2 Important Notes

2.1 Legal Bases

2.1.1 Subject to Changes

2.1.2 Personnel Qualifications

2.1.3 Use of the 750 Series in Compliance with Underlying

Provisions

2.1.4 Technical Condition of Specified Devices

2.2 Safety Advice (Precautions)

3 Device Description

EtherCat

3.1 View

3.2 Connectors

3.2.1 Data Contacts/Local Bus

3.2.2 Power Jumper Contacts/Field Supply

3.2.3 Push-in CAGE CLAMP

Connectors

3.3 Display Elements

3.4 Schematic Diagram

3.5 Technical Data

3.5.1 Connection Type

3.5.2 Climatic Environmental Conditions

3.6 Approvals

3.7 Standards and Guidelines

4 Process Image

4.1 Overview

4.2 Control and Status Byte

4.2.1 Process Data

4.2.2 Overview of Signal Voltages

4.2.3 Conversion of the Process Values

4.2.4 Resistor Bridge (Strain Gauge)

4.2.5 SG Bridge Voltage U

(±15 mV)

4.2.6 SG Bridge Voltage U

(±30 mV)

4.2.7 SG Bridge Voltage U

(±60 mV)

4.2.8 SG Bridge Voltage U

(±120 mV)

4.2.9 SG Bridge Voltage U

(±240 mV)

4.2.10 SG Bridge Voltage U

(±360 mV)

4.2.11 SG

U

(+5 V internal)

4.2.12 SG

U

(±5 V external)

4.2.13 SG

U

(±10 V external)

4.2.14 SG

U

(±15 V external)

5 Mounting

5.1 Mounting Sequence

5.2 Inserting and Removing Devices

5.2.1 Inserting the I/O Module

5.2.2 Removing the I/O Module

6 Connect Devices

6.1 Connecting a Conductor to the Push-in CAGE

CLAMP

6.2 Connection Examples

6.2.1 6-Wire Operation

6.2.2 4-Wire Operation (Internal Supply)

6.2.3 4-Wire Operation (External Supply)