Burkert 8791 Digital electropneumatic Positioner SideControl Operating instructions
The Burkert 8791 positioner provides precise control of media in industrial automation systems. Its compact design and sturdy construction make it suitable for use in demanding environments. With user-friendly controls and display, the 8791 enables easy operation and monitoring. Advanced features such as remote operation and AS-Interface connectivity enhance its versatility. Its high accuracy and reliability make it an ideal choice for applications requiring precise positioning of valves and actuators.
광고
광고
Type 8791
Positioner SideControl BASIC
Electropneumatic positioner
Elektropneumatischer Positioner
Régulateur de position électropneumatique
Quickstart
English / Deutsch / Français
We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous resérve de modification techniques.
© Bürkert Werke GmbH & Co. KG, 2009 - 2019
Operating Instructions 1902/08_EU-ML_00806173 / Original DE
Type 8791
1.1 Definition of term / abbreviation ............................................. 5
2.1 Restrictions ................................................................................. 6
3 BASIC SAFETY INSTRUCTIONS ..........................................................7
4 GENERAL INFORMATION ........................................................................8
4.1 Contact addresses ................................................................... 8
5 DESCRIPTION OF SYSTEM ....................................................................8
5.2 General description .................................................................. 9
6.1 Conformity ................................................................................... 9
6.2 Standards .................................................................................... 9
6.3 Operating conditions ................................................................ 9
6.4 Mechanical data.......................................................................10
6.5 Electrical data ...........................................................................10
6.6 Electrical data with AS-Interface bus control (optional) 11
6.7 Pneumatic data ........................................................................11
7.1 Operating status ....................................................................... 12
7.2 Control and display elements of the positioner ................12
7.3 Error messages ......................................................................... 16
Positioner Type 8791
8 ATTACHMENT AND ASSEMBLY ............................................................17
8.1 Installation of devices for the hazardous area ...................17
8.3 Attachment to a proportional valve with rotary actuator .21
8.4 Remote operation with external position sensor ..............24
9 FLUID CONNECTION ..............................................................................25
9.1 Connection of devices for the hazardous area .................25
9.2 Safety instructions ...................................................................25
9.3 Safety end positions ...............................................................26
10 ELECTRICAL CONNECTION ................................................................28
10.1 Connection of devices for the hazardous area .................28
10.2 Safety instructions ...................................................................28
10.3 Electrical connection with circular plug-in connector
M12, 8-pole ..............................................................................28
10.4 Electrical connection with cable gland ...............................30
10.5 Electrical installation AS-Interface........................................32
10.6 LED status display AS-Interface ..........................................33
11.1 Safety instructions ...................................................................34
11.2 Specifying the standard settings .........................................34
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12.1 Communications software.....................................................35
12.2 USB interface ...........................................................................35
12.3 Download ..................................................................................35
13 PACKAGING, TRANSPORT, STORAGE ..........................................36
Type 8791
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Type 8791
Quickstart
1 QUICKSTART
The operating instructions describe the entire life cycle of the device.
Keep these instructions in a location which is easily accessible to every user and make these instructions available to every new owner of the device.
Important Safety Information!
Read Quickstart carefully and thoroughly. Study in particular the
chapters entitled “Basic safety instructions” and “Authorized use”.
▶ Quickstart must be read and understood.
Quickstart for positioner Type 8791 explains, for example, how to install and start-up the device.
A detailed description of the device can be found in the operating instructions for positioner Type 8791.
The operating instructions can be found on the Internet at: www.burkert.com
1.1 Definition of term / abbreviation
The term “device” used in these instructions always stands for the positioner Type 8791.
In these instructions, the abbreviation “Ex” always refers to “potentially explosive”.
1.2 Symbols
The following symbols are used in these instructions.
DANGER!
Warns of an immediate danger.
▶ Failure to observe the warning may result in a fatal or serious injury.
WARNING!
Warns of a potentially dangerous situation.
▶ Failure to observe the warning may result in serious injuries or death.
CAUTION!
Warns of a possible danger.
▶ Failure to observe this warning may result in a medium or minor injury.
NOTE!
Warns of damage to property.
indicates important additional information, tips and recommendations.
refers to information in these operating instructions or in other documentation.
▶ Designates an instruction to prevent risks.
→ designates a procedure that must be carried out.
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2 AUTHORIZED USE
Incorrect use of the positioner Type 8791 can be dangerous to people, nearby equipment and the environment.
The device is designed for the open-loop control and closed-loop control of media.
▶ The device must not be exposed to direct sunlight.
▶ Pulsating direct voltage (rectified alternating voltage without smoothing) must not be used as power supply.
▶ In the potentially explosion-risk area the positioner Type 8791 may be used only according to the specification on the separate Ex type label. For use observe the additional information enclosed with the device together with safety instructions for the explosion-risk area.
▶ Devices without a separate Ex type label may not be used in a potentially explosive area.
▶ During use observe the permitted data, the operating conditions and conditions of use specified in the contract documents and operating instructions, as described in chapter
in this manual and in the operating instruction for the respective pneumatically actuated valve.
▶ The device may be used only in conjunction with third-party devices and components recommended and authorised by Bürkert.
▶ In view of the wide range of possible application cases, check whether the positioner is suitable for the specific application case.
▶ Correct transportation, correct storage and installation and careful use and maintenance are essential for reliable and faultless operation.
▶ Use the positioner Type 8791 only as intended.
Type 8791
Authorizeduse
2.1 Restrictions
If exporting the system/device, observe any existing restrictions.
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Type 8791
Basicsafetyinstructions
3 BASIC SAFETY INSTRUCTIONS
These safety instructions do not make allowance for any
• contingencies and events which may arise during the installation, operation and maintenance of the devices.
• local safety regulations – the operator is responsible for observing these regulations, also with reference to the installation personnel.
Risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure and deaerate/drain lines.
Risk of electric shock.
▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations for electrical equipment.
General hazardous situations.
To prevent injury, ensure that:
▶ That the system cannot be activated unintentionally.
▶ Installation and repair work may be carried out by authorized technicians only and with the appropriate tools.
▶ After an interruption in the power supply or pneumatic supply, ensure that the process is restarted in a defined or controlled manner.
▶ The device may be operated only when in perfect condition and in consideration of the operating instructions.
▶ The general rules of technology apply to application planning and operation of the device.
To prevent damage to property of the device, ensure:
▶ Do not supply the supply pressure connection of the system with aggressive or flammable mediums.
▶ Do not supply the supply pressure connection with any liquids.
▶ Do not put any loads on the housing (e.g. by placing objects on it or standing on it).
▶ Do not make any external modifications to the device housings.
Do not paint the housing parts or screws.
NOTE!
Electrostatic sensitive components / modules.
The device contains electronic components which react sensitively to electrostatic discharge (ESD). Contact with electrostatically charged persons or objects is hazardous to these components. In the worst case scenario, they will be destroyed immediately or will fail after start-up.
▶ Observe the requirements in accordance with EN 61340-5-1 to minimise or avoid the possibility of damage caused by sudden electrostatic discharge.
▶ Also ensure that you do not touch electronic components when the power supply voltage is present.
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4 GENERAL INFORMATION
4.1 Contact addresses
Germany
Bürkert Fluid Control Systems
Sales Center
Christian-Bürkert-Str. 13-17
D-74653 Ingelfingen
Tel. + 49 (0) 7940 - 10 91 111
Fax + 49 (0) 7940 - 10 91 448
E-mail: [email protected]
International
Contact addresses can be found on the final pages of these printed operating instructions.
And also on the internet at: www.burkert.com
Type 8791
Generalinformation
5 DESCRIPTION OF SYSTEM
5.1 Structure
Mechanical position indicator
Display module with 3 LEDs
Working connection 2
(connection: A2)
Supply pressure connection 1.4 – 7 bar
(connection: P)
Working connection 1
(connection: A1)
Air exhaust connection/ air exhaust filter
Pressure-relief valve
Fig. 1: Structure, positioner Type 8791
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Type 8791
Technicaldata
Electronic module
Internal position sensor
Control system
Axle for position sensor
Cable gland
Fig. 2: Structure, positioner Type 8791
5.2 General description
The positioner Type 8791 is a digital, electro-pneumatic position controller for pneumatically actuated proportional valves. The device incorporates the main function groups
- Position sensor
- Electro-pneumatic control system
- Microprocessor electronics
The position sensor measures the current positions of the proportional valve. The microprocessor electronics continuously compare the current position (actual value) with a set-point position value specified via the standard signal input and supplies the result to the position controller. If there is a control difference, the electro-pneumatic control system corrects the actual position accordingly.
6 TECHNICAL DATA
6.1 Conformity
In accordance with the EU Declaration of conformity, the positioner
Type 8791 is compliant with the EU Directives.
6.2 Standards
The applied standards, which verify conformity with the EU Directives, can be found on the EU-Type Examination Certificate and / or the EU Declaration of Conformity.
6.3 Operating conditions
WARNING!
If used outside, the device may be exposed to direct sunlight and temperature fluctuations which may cause malfunctions or leaks.
▶ If the device is used outdoors, do not expose it unprotected to the weather conditions.
▶ Ensure that the permitted ambient temperature does not exceed the maximum value or drop below the minimum value.
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Ambient temperature see type label
Degree of protection IP65 / IP67 1) according to EN 60529
(only if cables, plugs and sockets have been connected correctly)
1)
If the positioner is used under IP67 conditions, the ventilation filter (see
“Fig. 1”) must be removed and the exhaust air conducted into the dry
area.
Operating altitude up to 2000 m above sea level
6.4 Mechanical data
Dimensions See data sheet
Material
Housing material Plastic-coated aluminium
Other external parts Stainless steel (V4A), PC, PE, POM, PTFE
Sealing material EPDM, NBR, FKM
Weight approx. 1.0 kg
Type 8791
Technicaldata
6.5 Electrical data
Connections 2 cable glands (M20 x 1.5) with screwtype terminals 0.14 – 1.5 mm 2 or circular plug-in connector (M12, 8 pole plug)
Interfaces Communications interface USB:
Direct connection to PC via USB adapter.
Communication with communications software.
An external adapter with integrated interface driver is required.
Supply voltage 24 V DC ± 10 %, max. residual ripple 10%
Power consumption < 3.5 W
Input resistance for set-point value signal 180 Ω in 0/4 - 20 mA / Resolution 12 bit
Protection class III in accordance with DIN EN 61140
(VDE 0140-1)
Analog position feedback max. Burden (load) for current output
0/4 – 20 mA) 560 Ω
Inductive proximity switches 100 mA current limit
Binary input 0 – 5 V = log “0”, 10 – 30 V = log “1” inverted input in reverse order
(input current < 6 mA)
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Type 8791
Technicaldata
6.6 Electrical data with AS-Interface bus control (optional)
Connections circular plug-in connector
(M12, 4 pole plug)
Supply voltage 29.5 V – 31.6 V DC
(according to specification)
Units without external supply voltage:
Max. power
consumption 150 mA
Units with external supply voltage:
External supply voltage 24 V ± 10 %, the supply voltage unit must feature a secure disconnection in accordance with IEC 364-4-41 (PELV or SELV)
Max. power
consumption 100 mA
Max. power
consumption
from AS interface 50 mA
6.7 Pneumatic data
Control medium Quality classes in accordance with ISO
8573-1
Dust content Class 7, max. particle size 40 µm, max. particle density 10 mg/m³
Water content Class 3, max. pressure dew point - 20 °C or min. 10 degrees below the lowest operating temperature
Oil content Class X, max. 25 mg/m³
Temperature range of compressed air 0 – +60 °C
Pressure range 1.4 – 7 bar
Air flow rate 95 l
N
/ min (at 1.4 bar 2) ) for aeration and deaeration
150 l
N
/ min (at 6 bar 2) ) for aeration and deaeration
(Q
Nn
= 100 l
N
/ min (according to definition for pressure drop from 7 to 6 bar absolute).
Connections Internal thread G1/4“
2)
Pressure specifications: Overpressure with respect to atmospheric pressure english 11
Type 8791
Operating
7 OPERATING
7.1 Operating status
AUTOMATIC (AUTO)
Normal controller mode is implemented and monitored in AUTO-
MATIC operating status.
→
LED 1 ( MODE ) flashes green.
MANUAL
In MANUAL operating status the valve can be opened and closed manually via the keys.
→
LED 1 ( MODE ) flashes green.
→
LED 3 ( FAULT ) flashes red.
DIP switch 4 can be used to switch between the two operating sta-
tuses AUTOMATIC and MANUAL (see chapter “7.2.2 Function of the
7.2 Control and display elements of the positioner
Key 1
DIP Switches
LED 1 ( MODE )
LED 2 ( POSITION )
LED 3 ( FAULT )
Key 2
Communications interface
Fig. 3: Description of control elements
The positioner features 2 buttons, 4 DIP switches and 3 LEDs as a display element.
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Type 8791
Operating
7.2.1 Configuration of the keys
The configuration of the 2 buttons inside the housing varies depending on the operating status (AUTOMATIC / MANUAL).
The description of the operating status (AUTOMATIC / MANUAL) can
be found in the chapter entitled “7.1 Operating status”.
Key 1
Key 2
MANUAL operating status (DIP switch 4 set to ON):
Key Function
1 Aerate 3)
(manually open / close the actuator)
4)
2 Deaerate 3)
(manually open / close the actuator)
4)
3)
4)
No function if the binary input was activated with the “MANUAL /
AUTOMATIC change-over” via the communications software.
Depending on the operating principle of the actuator.
Tab. 1: Configuration of the keys for MANUAL operating status
Fig. 4: Description of the buttons
AUTOMATIC operating status (DIP switch 4 set to OFF):
Key Function
1 Press for 5 seconds to start the X.TUNE function
2 -
Tab. 2: Configuration of the keys for AUTOMATIC operating status english 13
Type 8791
Operating
7.2.2 Function of the DIP switches
ON
1 2 3 4
DIP-
Switches
1
Position Function
ON Reversal of the effective direction of the set-point value ( DIR.CMD
)
(set-point value 20 – 4 mA corresponds to position 0 – 100%)
OFF Normal effective direction of the set-point value (set-point value 4 – 20 mA corresponds to position 0 – 100%)
2 ON Sealing function active.
The valve completely closes below 2%
5) and opens above 98% of the set-point value ( CUTOFF )
OFF No sealing function
DIP-
Switches
3
Position Function
ON Correction characteristic for adjustment of the operating characteristic (Linearization of the operating characteristic CHARACT )
6)
OFF Linear characteristic
4 ON MANUAL operating status
OFF AUTO AUTOMATIC operating status
5)
6)
Factory setting can be changed via communications software.
Characteristic type can be changed via communications software.
Tab. 3: Function of the DIP switches
Information about the communications software:
The switching position of the DIP switch has priority over the communications software!
If the values of the sealing function ( CUTOFF ) or the correction characteristic ( CHARACT ) are changed via the communications software, the corresponding function must be active (DIP switch set to ON).
The effective direction of the set-point value ( DIR.CMD
) can be changed via the DIP switches.
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Type 8791
Operating
7.2.3 Display of the LEDs
LED 1, green (MODE )
Display of
AUTO, MANUAL, X.TUNE
LED 2, green / yellow (POSITION )
Display of actuator status
(open, closed, opens or closes)
LED 3, red ( FAULT )
Error status
Fig. 5: LED display
LED 1 (green, MODE ) and LED 3 (red, FAULT )
LED Status green on flashing slowly red off off
Display
Acceleration phase when Power ON
Operating status AUTO flashing alternating flashing Operating status MANUAL flashing quickly off off X.TUNE
function flashing slowly on FAULT (see chapter
flashing Operating status AUTO for sensor break detection
Tab. 4: LED Status, LED 1 and LED 3
LED 2 (green / yellow, POSITION )
LED-Status green on off flashes slowly off flashes quickly off
Display yellow off Actuator closed on Actuator open off Constant control deviation (actual value > nominal value) flashes slowly Constant control deviation (actual value > nominal value) off Closing in operating status
MANUAL flashes quickly Opening in operating status
MANUAL
Tab. 5: LED Status, LED 2 english 15
7.3 Error messages
7.3.1 Error messages in MANUAL and
AUTOMATIC operating status
Display Cause of fault
LED 3
(red,
FAULT on
)
Checksum error in data memory
→ Data memory defective
→ The device automatically switches to an older (possibly not current) data record.
Remedial action not possible, device defective.
Contact your
Bürkert sales office.
Tab. 6: Error messages in MANUAL and AUTOMATIC operating status
Type 8791
Operating
7.3.2 Error messages while the X.TUNE
function is running
Display Cause of fault
LED 3
(red,
FAULT ) on
No compressed air connected
Compressed air failure during the X.TUNE
Actuator or control system deaeration side leaking
Remedial action
Connect compressed air
Check compressed air supply not possible, device defective
Control system aeration side leaking
The angular range of the position sensor exceeds
150° not possible, device defective
Correct the attachment of the shaft for the position sensor on the actuator (see
Tab. 7: Error messages while the X.TUNE
function is running
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Type 8791
Attachmentandassembly
8 ATTACHMENT AND ASSEMBLY
8.1 Installation of devices for the hazardous area
When installing devices in the hazardous area, observe the “Additional information for use in the hazardous area“ enclosed with the
Ex-devices.
8.2 Attachment to a proportional valve with NAMUR linear actuators
The valve position is transferred to the position sensor installed in the positioner via a lever (according to NAMUR).
The attachment kit for the linear actuators can be purchased from Bürkert as an accessory by quoting the identification
number 787215. The associated parts are listed in the “Tab.
8: Attachment kit for linear actuators”.
Part no. Quantity Name
3
4
1
2
5
6a
1
1
2
1
1
1
NAMUR mounting bracket IEC 534
Hoop
Clamping piece
Driver pin
Conical roller
NAMUR lever for stroke range 3 – 35 mm
3
3
1
1
1
1
4
1
2
1
6
6
4
2
1
2
14
15
16
17
18
19
21
22
10
11
12
13
8
9
6b
7
Tab. 8: Attachment kit for linear actuators
NAMUR lever for stroke range 35 – 130 mm
U-bolt
Hexagon bolt DIN 933 M8 x 20
Hexagon bolt DIN 933 M8 x 16
Circlip DIN 127 A8
Washer DIN 125 B8.4
Washer DIN 125 B6.4
Spring VD-115E 0.70 x 11.3 x 32.7 x 3.5
Spring washer DIN 137 A6
Locking washer DIN 6799 - 3.2
Circlip DIN 127 A6
Hexagon bolt DIN 933 M6 x 25
Hexagon nut DIN 934 M6
Square nut DIN 557 M6
Hexagon nut DIN 934 M8
Guide washer 6.2 x 9.9 x 15 x 3.5
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8.2.1 Installation
WARNING!
Risk of injury from improper installation.
▶ Installation may be carried out by authorised technicians only and with the appropriate tools.
Risk of injury from unintentional activation of the system and an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following assembly, ensure a controlled restart.
Yoke mount procedure:
→
Using the bracket
②
the clamping pieces
③
, hexagon bolts
⑰ and circlips
⑯
attach the hoop to the actuator spindle.
2
Type 8791
Attachmentandassembly
→
Select short or long lever according to the stroke of the actuator
(see “Tab. 8: Attachment kit for linear actuators”, part no. 6a/6b).
→
Assemble lever (if not pre-assembled) (see “Fig. 7”).
17
16
12
6
19
12
14
18
22
13
16
4
5
15
Fig. 7: Assembling the lever
17
Fig. 6: Attaching the hoop
3
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Type 8791
Attachmentandassembly
The gap between the driver pin and the axle should be the same as the drive stroke. This results in the ideal angular
range of the lever of 60° (see “Fig. 8”).
Angular range of the position sensor:
The maximum angular range of the position sensor is 150°.
Rotational range of the lever:
To ensure that the position sensor operates at a good resolution, the rotational range of the lever must be at least 30°.
The rotational movement of the lever must be within the position sensor angular range of 150°.
The scale printed on the lever is not relevant.
Angular range of the lever
Ideal: 60°
Minimal: 30°
Maximal: 150°
The rotational movement of the lever must be within the position sensor rotational range of 150°.
Fig. 8: Rotational range of the lever
→
Attach lever to the axle of the positioner and screw tight (
⑲
).
⑰
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8.2.2 Attaching mounting bracket
→
Attach mounting bracket
①
to the back of the positioner with hexagon bolts
⑨
, circlip
⑩
and washers
⑪
The selection of the M8 thread used on the positioner depends on the size of the actuator.
→
To determine the correct position, hold the positioner with mounting bracket on the actuator.
The conical roller on the lever of the position sensor in the hoop must be able to run freely on the drive over the entire stroke range.
At 50% stroke the lever position should be approximately hori-
zontal (see chapter “8.2.3 Aligning lever mechanism”).
M8 thread
⑨
Type 8791
Attachmentandassembly
Attaching the positioner with mounting bracket for actuators with cast frame:
→
Attach mounting bracket to the cast frame with one or more hexagon bolts
⑧
, washers
⑪
and circlips
⑩
8 10 11
①
Fig. 9: Attaching mounting bracket
20
⑩ ⑪ english
8
10
11
Fig. 10: Attach positioner with mounting bracket; for actuators with cast frame
Type 8791
Attachmentandassembly
Attaching the positioner with mounting bracket for actuators with columnar yoke:
→
Attach mounting bracket to the columnar yoke with the U-bolt
⑦
, washers
⑪
, circlips
⑩
and hexagon nuts 21
21
10
11
7
Fig. 11: Attach positioner with mounting bracket; for actuators with columnar yoke
8.2.3 Aligning lever mechanism
The lever mechanism cannot be correctly aligned until the device has been connected electrically and pneumatically.
→
Move the actuator in manual mode to half stroke (according to the scale on the actuator).
→
Adjust the height of the positioner until the lever is horizontal.
→
Fix the positioner in this position on the actuator.
8.3 Attachment to a proportional valve with rotary actuator
The axle of the position sensor integrated in the positioner is connected directly to the axle of the rotary actuator.
The assembly bridge can be purchased from Bürkert as an accessory by quoting the identification number 770294.
The attachment kit for the rotary actuators can be purchased from Bürkert as an accessory by quoting the identification number 787338.
The associated parts are listed in the “Tab. 9: Mounting kit on rotary actuator”.
Part no. Quantity
3
4
1
2
5
1
2
4
4
2
Name
Adapter
Setscrew DIN 913 M4 x 10
Cheese-head screw DIN 933 M6 x 12
Circlip B6
Hexagon nut DIN 985, M4
Tab. 9: Mounting kit on rotary actuator english 21
8.3.1 Installation
WARNING!
Risk of injury from improper installation.
▶ Installation may be carried out by authorised technicians only and with the appropriate tools.
Risk of injury from unintentional activation of the system and an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following assembly, ensure a controlled restart.
Procedure:
→
Specify the attachment position of the positioner:
- parallel to the actuator or
- rotated by 90° to the actuator.
→
Determine home position and direction of rotation of the actuator.
Anti-twist safeguard:
Note the flat side of the axle!
One of the setscrews must be situated on the flat side of the
axle as an anti-twist safeguard (see “Fig. 12”).
→
Connect adapter
2 setscrews.
① to the axle of the positioner and secure with
→
Secure setscrews with self-locking nuts to prevent them from working loose.
Type 8791
Attachmentandassembly
Angular range of the position sensor:
The maximum angular range of the position sensor is 150°.
The axle of the positioner may be moved within this range only.
Angular range of the positioner = 90°
Ideal position: 90°
Minimal: 30°
Maximal: 150°
Flattened axle
The rotational movement of the rotary actuator must be within the position sensor rotational range of 150°.
Fig. 12: Angular range / anti-twist safeguard
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Type 8791
Attachmentandassembly
→
Assemble the multi-part assembly bridge actuator.
* suitable for the
→
Attach the assembly bridge to the positioner using 4 cheesehead screws
③
and circlips
④
→
Place positioner with assembly bridge on the rotary actuator and
①
④
Fig. 14: Rotary actuator attachment
③
* The assembly bridge consists of 4 parts which can be adjusted to the actuator by varying the arrangement.
Fig. 13: Attach assembly bridge (schematic representation) english 23
Type 8791
Attachmentandassembly
8.4 Remote operation with external position sensor
In the case of this model the positioner has no position sensor in the form of a rotary position sensor, but an external Remote-Sensor.
The Remote-Sensor Type 8798 is connected via a serial, digital interface.
8.4.1 Mounting accessories
There are two options of attaching the positioner in remote operation
Installation on a DIN rail with accessory kit, part no. 675702
Installation on a wall with accessory kit, part no. 675715
8.4.2 Connection and start-up of the
Remote-Sensor Type 8798
WARNING!
Risk of injury from improper start-up.
▶ Start-up may be carried out by authorised technicians only and with the appropriate tools.
Risk of injury from unintentional activation of the system and an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following assembly, ensure a controlled restart.
→
Connect the 4 wires of the sensor cable to the designated
screw-type terminals of the positioner (see chapter “10.4.5
Terminal assignment for connecting the external position sensor
→
Attach Remote-Sensor on the actuator.
The correct procedure is described in the brief instructions for the Remote-Sensor.
→
Connect positioner pneumatically to the actuator.
→
Connect compressed air to positioner.
→
Switch on supply voltage to the positioner.
→
Run the X.TUNE
function.
Fig. 15: Attachment types in remote operation
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Type 8791
Fluidconnection
9 FLUID CONNECTION
9.1 Connection of devices for the hazardous area
When connecting devices in the hazardous area, observe the
“Additional information for use in the hazardous area“ enclosed with the Ex-devices.
9.2 Safety instructions
DANGER!
Risk of injury from high pressure in the equipment/device.
▶ Before working on equipment or device, switch off the pressure and deaerate/drain lines.
WARNING!
Risk of injury from improper installation.
▶ Installation may be carried out by authorized technicians only and with the appropriate tools.
Risk of injury from unintentional activation of the system and an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following installation, ensure a controlled restart.
Working connection 2
(connection: A2)
Supply pressure connection
1.4 – 7 bar (connection: P)
Working connection 1
(connection: A1)
Deaeration connection
Fig. 16: Fluid installation / Location of the connections
Procedure:
→
Apply supply pressure (1.4 – 7 bar) to the supply pressure connection P.
For single-acting actuators (control function A or B):
→
Connect one working connection (A1 or A2, depending on required safety end position) to the chamber of the single-acting actuator.
Safety end positions see chapter “9.3 Safety end positions”.
→
Seal a working connection which is not required with a plug.
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For double-acting actuators (control function I):
→
Connect working connections A1 and A2 to the respective chambers of the double-acting actuator.
Safety end positions see chapter “9.3 Safety end positions”.
Important information for perfect control behavior.
This ensures that the control behavior is not extremely negatively affected in the upper stroke range on account of too little pressure difference.
▶ keep the applied supply pressure at least 0.5 – 1 bar above the pressure which is required to move the pneumatic actuator to its end position.
If fluctuations are greater, the control parameters measured with the X.TUNE
function are not optimum.
▶ during operation keep the fluctuations of the supply pressure as low as possible (max. ±10%).
Type 8791
Fluidconnection
9.3 Safety end positions
The safety end position after failure of the electrical auxiliary power depends on the fluid connection of the actuator to the working connections A1 or A2.
9.3.1 Single-acting actuators
Actuator system up
Safety end positions after failure of the electrical auxpneumatic iliary power down auxiliary power
→
Connection according to
up down down
Control function A
→
Connection according to
up
→
Connection according to
up down
Control function B down
→
Connection according to
Tab. 10: Safety end positions - single-acting actuators up
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Type 8791
Fluidconnection
Single-acting actuator - control function A or B
Connection: working connection A1 to actuator
A2 sealing
Fig. 17: Connection A1
Connection: working connection A2 to actuator
A1 sealing
Fig. 18: Connection A2
9.3.2 Double-acting actuators
Actuator system
Safety end positions after failure of the electrical auxiliary power pneumatic auxiliary power
→
Connection
upper chamber lower chamber up up = lower chamber of the actuator to A2 not defined down
Control function I down = upper chamber of the actuator to A2
Tab. 11: Safety end positions - double-acting actuators
Double-acting actuators - control function I
Connection:
Working connection A1 and A2 to actuator
Safety end position: up = lower chamber to A2 down = upper chamber to A2
Fig. 19: Connection with control function I english 27
10 ELECTRICAL CONNECTION
All electrical inputs and outputs of the device are not galvanically isolated from the supply voltage.
10.1 Connection of devices for the hazardous area
When connecting devices in the hazardous area, observe the “Additional information for use in the hazardous area“ enclosed with the
Ex-devices.
10.2 Safety instructions
DANGER!
Risk of electric shock.
▶ Before working on equipment or device, switch off the power supply and secure to prevent reactivation.
▶ Observe applicable accident prevention and safety regulations for electrical equipment.
WARNING!
Risk of injury from improper installation.
▶ Installation may be carried out by authorized technicians only and with the appropriate tools.
Risk of injury from unintentional activation of the system and an uncontrolled restart.
▶ Secure system from unintentional activation.
▶ Following installation, ensure a controlled restart.
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Type 8791
Electricalconnection
10.3 Electrical connection with circular plug-in connector M12, 8-pole
10.3.1 Designation of the circular plug-in connector
Operating voltage and diverse signals
2 1
8
3 7
4
5
M12, 8-pole plug
6
Functional earth FE
Fig. 20: Designation of the circular plug-in connector and contacts
Type 8791
Electricalconnection
10.3.2 Pin assignment for operating voltage
Pin Wire color 7)
Configuration External circuit / Signal level
3 green GND
3
4 yellow +24 V 4
24 V DC ± 10 % max. residual ripple 10%
Tab. 12: Pin assignment; operating voltage
10.3.3 Pin assignment for input signals from the control centre (e.g. PLC)
Pin Wire color 7)
Configuration On the device side
External circuit /
Signal level
1 white Set-point value +
(0/4 – 20 mA)
1
2
5 brown grey
Set-point value GND
Binary input
2
5
+ (0/4 – 20 mA)
GND set-point value
+
0 – 5 V (log. 0)
10 – 30 V (log. 1) with reference to
Pin 3 (GND)
Tab. 13: Pin assignment; input signals of the control centre
10.3.4 Pin assignment for output signals to the control centre (e.g. PLC) - required for analogue output option only
Pin Wire color 7)
8 red
Configuration On the device side
Analogue feedback +
8
External circuit / Signal level
+ (0/4 – 20 mA)
7 blue
Analogue feedback GND
7 GND (identical with the
GND operating voltage)
Tab. 14: Pin assignment; output signals to the control centre
7)
The indicated wire colors refer to the connection cable, part no. 919061, available as an accessory english 29
10.4 Electrical connection with cable gland
11 +
12 –
81
82
31 +
32 –
A
B
+
–
+24 V
GND
Fig. 21: Designation of the screw-type terminals
Type 8791
Electricalconnection
10.4.1 Connection of the terminals
→
Unscrew the 4 screws on the housing cover and remove the cover.
The screw-type terminals are now accessible.
→
Connect terminals according to the configuration.
10.4.2 Terminal assignment for input signals from the control centre (e.g. PLC)
Terminal Configuration On the device side
11 + Set-point value +
11 +
12 –
Set-point value GND
12 –
External circuit / Signal level
+ (0/4 – 20 mA)
GND set-point value
81 + Binary input + 81 + +
0 – 5 V (log. 0)
10 – 30 V (log. 1)
82 – Binary input – 82 –
GND (identical with the
GND operating voltage)
Tab. 15: Terminal assignment; input signals of the control centre
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Type 8791
Electricalconnection
10.4.3 Terminal assignment for output signals to the control centre (e.g. PLC)
- (required for analogue output option only)
Terminal Configuration On the device side
31 + Analogue feedback +
31 +
External circuit / Signal level
+ (0/4 – 20 mA)
32 –
Analogue feedback GND
32 –
GND (identical with the
GND operating voltage)
Tab. 16: Terminal assignment; output signals to the control centre
10.4.4 Terminal assignment for operating voltage
Terminal Configuration External circuit / Signal level
+24 V
GND
Operating voltage +
Operating voltage GND
+24 V
GND
Tab. 17: Terminal assignment; operating voltage
24 V DC ± 10 % max. residual ripple 10%
10.4.5 Terminal assignment for connecting the external position sensor (for remote model only)
Terminal Configuration
S +
S –
A
On the device side
External circuit / Signal level
Supply sensor +
Supply sensor –
S +
S –
Serial interface,
A cable
A
+
–
A-line
Remote
Sensor
Type
8798 8)
B
8)
Serial interface,
B-cable
B B-line
Assignment of the wire color see “Tab. 19”
Tab. 18: Terminal assignment; external position sensor
Positioner
Terminal
Wire color Remote-
Sensor with cable type 1
Wire color Remote-
Sensor with cable type 2
S +
S – brown white brown black
A
B green yellow red orange
Tab. 19: Assignment of the wire color (Remote-Sensor) english 31
10.5 Electrical installation AS-Interface
A detailed description of the bus communication can be found in the operating instructions Type 8791.
10.5.1 Connection with circular plug-in connector M12 x 1, 4-pole, male
Connector views
The views show the image from the front looking at the pins, the solder connections are behind them.
Pin 4:
NC
Pin 3:
Bus –
Pin 1:
Bus +
Pin 2:
NC
Fig. 22: Bus connection without external supply voltage
Pin 4:
24 V +
Pin 3:
Bus –
Pin 1:
Bus +
Pin 2:
GND
Fig. 23: Bus connection with external supply voltage (optional)
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Type 8791
Electricalconnection
Bus connection without external / with external supply voltage
Pin Designation Configuration
1 Bus + AS Interface bus line +
2
3
NC or GND
(optional)
Bus – not used or external supply voltage –
(optional)
AS Interface bus line –
4
NC or 24 V +
(optional) not used or external supply voltage +
(optional)
Tab. 20: Pin assignment of circular plug-in connector for AS-Interface
When the supply voltage is applied, the positioner is operating.
→
Actuate the automatic adjustment of the positioner, as described
in the chapter entitled “11.2 Specifying the standard settings”.
10.5.2 Programming data AS-Interface
Version Profile S-7.3.4
I/O configuration
ID code
Extended
ID code 1
Extended
ID code 2
Profile
7 hex
3 hex (analog profile)
F hex (Default value, can be changed by the user)
4 hex
S-7.3.4
Tab. 21: Programming data
Version Profile S-7.A.5
7 hex
A hex
7 hex
5 hex
S-7.A.5
Type 8791
Electricalconnection
10.6 LED status display AS-Interface
The LED bus status display indicates the status of the AS-Interface
(LED green and red).
Bus LED 1, green
Bus LED 2, red
Fig. 24: LED status display (AS-Interface)
Bus LED 1
(green)
Bus LED 2
(red) off off POWER OFF off on on off
No data traffic (expired Watch Dog at slave address does not equal 0)
OK flashing on Slave address equals 0 off flashing Electronic error or external reset flashing flashing
Timeout bus communication after 100 ms (periphery error)
Tab. 22: LED Status display (AS-Interface) english 33
11 START-UP
11.1 Safety instructions
WARNING!
Risk of injury from improper operation.
Improper operation may result in injuries as well as damage to the device and the area around it.
▶ Before start-up, ensure that the operating personnel are familiar with and completely understand the contents of the operating instructions.
▶ Observe the safety instructions and intended use.
▶ Only adequately trained personnel may operate the equipment/ the device.
Type 8791
Start-up
11.2 Specifying the standard settings
The basic settings of the positioner are implemented at the factory.
To adjust the positioner to local conditions, the X.TUNE
function must be run following installation.
11.2.1 Running the automatic adjustment
X.TUNE
:
WARNING!
While the X.TUNE
function is running, the valve automatically moves from its current position.
▶ Never run X.TUNE
while a process is running.
▶ Take appropriate measures to prevent the equipment from being accidentally actuated.
NOTE!
Avoid maladjustment of the controller due to an incorrect supply pressure or applied operating medium pressure.
▶ Run X.TUNE
whenever the supply pressure (= pneumatic auxiliary energy) is available during subsequent operation.
▶ Run the X.TUNE
function preferably without operating medium pressure to exclude interference caused by flow forces.
34 english
Type 8791
Accessories
To run X.TUNE
, the positioner must be in the AUTOMATIC operating status
(DIP switch 4 = OFF).
→
Start X.TUNE
by pressing button 1 for 5 sec
9)
.
While X.TUNE
is running, LED 1 flashes very quickly (green).
When the automatic adjustment has completed, LED 1 flashes slowly
(green) 10) .
The changes are automatically transferred to the memory (EEPROM) only when the X.TUNE
function is successful.
If LED 3 (red) is lit after the X.TUNE
function started, the
X.TUNE
function was ended due to a fault.
→
Check possible faults
(see “Tab. 7: Error messages while the X.TUNE function is running” ).
→
Then repeat the X.TUNE
function.
12 ACCESSORIES
Designation
USB adapter for connection to a PC in conjunction with an extension cable
Communicator / PACTware and DTM
Tab. 23: Accessories
Order no.
227093
Information at www.burkert.com
12.1 Communications software
The PC operating program “Communicator” is designed for communication with the devices from the Bürkert positioner family. Devices constructed since August 2014 support the full range of functions.
If you have any questions regarding compatibility, please contact the
Bürkert Sales Center.
A detailed description and precise schedule of the procedure for the installation and operation of the software can be found in the associated documentation.
12.2 USB interface
The PC requires an USB interface for communication with the positioners as well as an additional adapter with interface driver (see
12.3 Download
Download the software at: www.burkert.com
9)
10)
The X.TUNE can also be started via communications software.
If a fault occurs, LED 3 is lit red. english 35
13 PACKAGING, TRANSPORT,
STORAGE
NOTE!
Transport damages.
Inadequately protected equipment may be damaged during transport.
▶ During transportation protect the device against moisture and dirt in shock-resistant packaging.
▶ Follow the allowable storage temperature.
Incorrect storage may damage the device.
▶ Store the device in a dry and dust-free location.
▶ Storage temperature -20 – +65 °C.
Damage to the environment caused by device components contaminated with media.
▶ Dispose of the device and packaging in an environmentally friendly manner.
▶ Observe applicable regulations on disposal and the environment.
36 english
Type 8791
Packaging,transport,storage
www.burkert.com
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