National Instruments NI 9425 Operating instructions

OPERATING INSTRUCTIONS AND SPECIFICATIONS

NI 9425

32-Channel, 24 V Sinking Digital Input Module

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This document describes how to use the National Instruments 9425 and includes specifications and pin assignments for the NI 9425.

Visit ni.com/info and enter rdsoftwareversion to determine which software you need for the modules you are using. For information about installing, configuring, and programming the system, refer to the system documentation. Visit ni.com/info and enter cseriesdoc for information about C Series documentation.

Note The safety guidelines and specifications in this document are specific to the NI 9425. The other components in the system might not meet the same safety ratings and specifications. Refer to the documentation for each component in the system to determine the safety ratings and specifications for the entire system. Visit ni.com/info and enter cseriesdoc for information about C Series documentation.

NI 9425 Operating Instructions and Specifications 2 ni.com

Safety Guidelines

Operate the NI 9425 only as described in these operating instructions.

Hot Surface This icon denotes that the component may be hot. Touching this component may result in bodily injury.

Safety Guidelines for Hazardous Voltages

If hazardous voltages are connected to the module, take the following precautions. A hazardous voltage is a voltage greater than 42.4 V pk

or 60 VDC to earth ground.

Caution Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards.

Caution Do not mix hazardous voltage circuits and human-accessible circuits on the same module.

Caution Make sure that devices and circuits connected to the module are properly insulated from human contact.

© National Instruments Corp. 3 NI 9425 Operating Instructions and Specifications

Caution When module terminals are hazardous voltage

LIVE (>42.4 V pk

/60 VDC), you must ensure that devices and circuits connected to the module are properly insulated from human contact.

Safety Guidelines for Hazardous Locations

The NI 9425 is suitable for use in Class I, Division 2, Groups A, B,

C, D, T4 hazardous locations; Class I, Zone 2, AEx nC IIC T4, and

Ex nC IIC T4 hazardous locations; and nonhazardous locations only. Follow these guidelines if you are installing the NI 9425 in a potentially explosive environment. Not following these guidelines may result in serious injury or death.

Caution Do not disconnect I/O-side wires or connectors unless power has been switched off or the area is known to be nonhazardous.

Caution Do not remove modules unless power has been switched off or the area is known to be nonhazardous.

Caution Substitution of components may impair suitability for Class I, Division 2.

NI 9425 Operating Instructions and Specifications 4 ni.com

Caution For Zone 2 applications, install the system in an enclosure rated to at least IP 54 as defined by

IEC 60529 and EN 60529.

Caution For Zone 2 applications, connected signals must be within the following limit:

Capacitance .......................... 0.03 μF max

Special Conditions for Hazardous Locations Use in Europe

This equipment has been evaluated as EEx nC IIC T4 equipment under DEMKO Certificate No. 03 ATEX 0324020X. Each module is marked II 3G and is suitable for use in Zone 2 hazardous locations. If you are using the NI 9425 in Gas Group IIC hazardous locations or in ambient temperatures of –40 °C ≤ Ta ≤ 70 °C, you must use the device in an NI chassis that has been evaluated as

EEx nC IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

© National Instruments Corp. 5 NI 9425 Operating Instructions and Specifications

Special Conditions for Marine Applications

Some modules are Lloyd’s Register (LR) Type Approved for marine applications. To verify Lloyd’s Register certification, visit ni.com/certification and search for the LR certificate, or look for the Lloyd’s Register mark on the module.

Caution To meet radio frequency emission requirements for marine applications, use shielded cables and install the system in a metal enclosure. Suppression ferrites must be installed on power supply inputs near power entries to modules and controllers. Power supply and module cables must be separated on opposite sides of the enclosure and must enter and exit through opposing enclosure walls.

NI 9425 Operating Instructions and Specifications 6 ni.com

Connecting the NI 9425

The NI 9425 has a 37-pin DSUB connector that provides connections for 32 simultaneously-sampled digital input channels.

DI25

DI26

DI27

DI28

DI29

DI30

DI31

DI16

DI17

DI18

DI19

DI20

DI21

DI22

DI23

COM

COM

DI24

24

25

26

27

28

29

30

20

21

22

23

31

32

33

34

35

36

37

9

10

11

6

7

8

1

4

5

2

3

12

13

14

15

16

17

18

19

DI0

DI1

DI2

DI3

DI4

DI5

DI6

DI7

COM

COM

DI8

DI9

DI10

DI11

DI12

DI13

DI14

DI15

NC

© National Instruments Corp.

Figure 1. NI 9425 Pin Assignments

7 NI 9425 Operating Instructions and Specifications

Each channel has a DI pin to which you can connect a digital input signal. The NI 9425 has four common pins, COM, that are internally connected to the isolated reference of the module.

The NI 9425 has sinking inputs, meaning that when the device drives a current or applies a voltage to the DI pin, the pin provides a path to COM for the current or voltage. The NI 9425 internally limits current signals connected to DI. For more information about input current levels, refer to the

Specifications

section.

You can connect 2-, 3-, and 4-wire sourcing-output devices to the NI 9425. A sourcing-output device drives current or applies voltage to the DI pin. An example of a sourcing-output device is an open collector PNP.

Connect the sourcing-output device to the DI pin on the NI 9425.

Connect the common of the external device to the COM pin. Refer

to Figure 2 for an illustration of connecting a device to the

NI 9425.

NI 9425 Operating Instructions and Specifications 8 ni.com

Sourcing-Output

Device

DI

External

Power

Supply

+

_

COM

NI 9425

Figure 2. Connecting a Device to the NI 9425 (Three-Wire Device Shown)

The NI 9425 channel registers as ON when the sourcing-output device applies a voltage or drives a current that is in the input ON range to the DI pin. The channel registers as OFF when the device applies a voltage or drives a current that is in the input OFF range to the DI pin. If no device is connected to the DI pin, the channel registers as OFF. Refer to the

Specifications

section for more information about the ON and OFF states.

© National Instruments Corp. 9 NI 9425 Operating Instructions and Specifications

Sleep Mode

This module supports a low-power sleep mode. Support for sleep mode at the system level depends on the chassis that the module is plugged into. Refer to the chassis manual for information about support for sleep mode. If the chassis supports sleep mode, refer to the software help for information about enabling sleep mode. Visit ni.com/info and enter cseriesdoc for information about

C Series documentation.

Typically, when a system is in sleep mode, you cannot communicate with the modules. In sleep mode, the system consumes minimal power and may dissipate less heat than it does in normal mode. Refer to the

Specifications section for more

information about power consumption and thermal dissipation.

NI 9425 Operating Instructions and Specifications 10 ni.com

Specifications

The following specifications are typical for the range –40 to 70 °C unless otherwise noted. All voltages are relative to COM unless otherwise noted.

Input Characteristics

Number of channels.......................... 32 digital input channels

Input type .......................................... Sinking

Digital logic levels

OFF state

Input voltage ........................≤5 V

Input current .........................≤150 μA

ON state

Input voltage ........................≥10 V

Input current .........................≥330 μA

Hysteresis

Input voltage ........................ 2 V min

Input current......................... 60 μA min

Input impedance................................ 30 k Ω ± 5%

© National Instruments Corp. 11 NI 9425 Operating Instructions and Specifications

I/O protection

Input voltage

8 channels ............................ 60 VDC max

32 channels .......................... 30 VDC max

Reverse-biased voltage

8 channels ............................ –60 VDC max

32 channels .......................... –30 VDC max

Hold time 1 ......................................... 0 μs min

Setup time 2 ........................................ 1 μs min

Update/transfer time 3 cRIO-9151 R Series

Expansion chassis....................... 8 μs max

All other chassis ......................... 7 μs max

1 Hold time is the amount of time input signals must be stable after initiating a read from the module.

2 Setup time is the amount of time input signals must be stable before reading from the module.

3 The update/transfer time is valid when the module is used in a CompactRIO system.

When used in other systems, driver software and system latencies impact this time.

NI 9425 Operating Instructions and Specifications 12 ni.com

MTBF ............................................... 1,256,699 hours at 25 °C;

Bellcore Issue 2, Method 1,

Case 3, Limited Part Stress

Method

Note Contact NI for Bellcore MTBF specifications at other temperatures or for MIL-HDBK-217F specifications.

Power Requirements

Power consumption from chassis

Active mode ............................... 410 mW max

Sleep mode ................................. 0.5

mW max

Thermal dissipation (at 70 °C)

Active mode ............................... 1.45 W max

Sleep mode ................................. 1 W max

Physical Characteristics

If you need to clean the module, wipe it with a dry towel.

Weight............................................... 147 g (5.2 oz)

© National Instruments Corp. 13 NI 9425 Operating Instructions and Specifications

Safety

Safety Voltages

Connect only voltages that are within the following limits.

Channel-to-COM .............................. 60 VDC max

Isolation

Channel-to-channel .................... None

Channel-to-earth ground

Continuous ........................... 60 VDC,

Measurement Category I

Withstand ............................. 1,000 V rms

, verified by a 5 s dielectric withstand test

Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.

NI 9425 Operating Instructions and Specifications 14 ni.com

Caution Do not connect the NI 9425 to signals or use for measurements within Measurement Categories II,

III, or IV.

Hazardous Locations

U.S. (UL) .......................................... Class I, Division 2,

Groups A, B, C, D, T4;

Class I, Zone 2,

AEx nC IIC T4

Canada (C-UL) ................................. Class I, Division 2,

Groups A, B, C, D, T4;

Class I, Zone 2,

Ex nC IIC T4

Europe (DEMKO)............................. EEx nC IIC T4

Safety Standards

This product meets the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use:

• IEC 61010-1, EN 61010-1

• UL 61010-1, CSA 61010-1

© National Instruments Corp. 15 NI 9425 Operating Instructions and Specifications

Note For UL and other safety certifications, refer to the

product label or the Online Product Certification section.

Electromagnetic Compatibility

This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:

• EN 61326 (IEC 61326): Class A emissions; Basic immunity

• EN 55011 (CISPR 11): Group 1, Class A emissions

• AS/NZS CISPR 11: Group 1, Class A emissions

• FCC 47 CFR Part 15B: Class A emissions

• ICES-001: Class A emissions

Note For the standards applied to assess the EMC of this

product, refer to the Online Product Certification

section.

Note For EMC compliance, operate this device with shielded cabling.

NI 9425 Operating Instructions and Specifications 16 ni.com

CE Compliance

This product meets the essential requirements of applicable

European Directives as follows:

• 2006/95/EC; Low-Voltage Directive (safety)

• 2004/108/EC; Electromagnetic Compatibility Directive

(EMC)

Online Product Certification

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/ certification , search by module number or product line, and click the appropriate link in the Certification column.

Shock and Vibration

To meet these specifications, you must panel mount the system.

Operating vibration

Random (IEC 60068-2-64)......... 5 g rms

, 10 to 500 Hz

Sinusoidal (IEC 60068-2-6) ....... 5 g, 10 to 500 Hz

© National Instruments Corp. 17 NI 9425 Operating Instructions and Specifications

Operating shock

(IEC 60068-2-27).............................. 30 g, 11 ms half sine,

50 g, 3 ms half sine,

18 shocks at 6 orientations

Environmental

National Instruments C Series modules are intended for indoor use only but may be used outdoors if installed in a suitable enclosure.

Refer to the manual for the chassis you are using for more information about meeting these specifications.

Operating temperature

(IEC 60068-2-1, IEC 60068-2-2) ..... –40 to 70 °C

Storage temperature

(IEC 60068-2-1, IEC 60068-2-2) ..... –40 to 85 °C

Ingress protection.............................. IP 40

Operating humidity

(IEC 60068-2-56).............................. 10 to 90% RH, noncondensing

Storage humidity

(IEC 60068-2-56).............................. 5 to 95% RH, noncondensing

NI 9425 Operating Instructions and Specifications 18 ni.com

Maximum altitude............................. 2,000 m

Pollution Degree (IEC 60664) .......... 2

Environmental Management

NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.

For additional environmental information, refer to the NI and the

Environment Web page at ni.com/environment . This page contains the environmental regulations and directives with which

NI complies, as well as other environmental information not included in this document.

Waste Electrical and Electronic Equipment (WEEE)

EU Customers At the end of the life cycle, all products

must be sent to a WEEE recycling center. For more information about WEEE recycling centers and National

Instruments WEEE initiatives, visit ni.com/ environment/weee .

© National Instruments Corp. 19 NI 9425 Operating Instructions and Specifications

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Where to Go for Support

The National Instruments Web site is your complete resource for technical support. At ni.com/support you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from

NI Application Engineers.

National Instruments corporate headquarters is located at

11500 North Mopac Expressway, Austin, Texas, 78759-3504.

National Instruments also has offices located around the world to help address your support needs. For telephone support in the

United States, create your service request at ni.com/support and follow the calling instructions or dial 512 795 8248. For

NI 9425 Operating Instructions and Specifications 20 ni.com

telephone support outside the United States, contact your local branch office:

Australia 1800 300 800, Austria 43 662 457990-0,

Belgium 32 (0) 2 757 0020, Brazil 55 11 3262 3599,

Canada 800 433 3488, China 86 21 5050 9800,

Czech Republic 420 224 235 774, Denmark 45 45 76 26 00,

Finland 358 (0) 9 725 72511, France 01 57 66 24 24,

Germany 49 89 7413130, India 91 80 41190000,

Israel 972 3 6393737, Italy 39 02 41309277, Japan 0120-527196,

Korea 82 02 3451 3400, Lebanon 961 (0) 1 33 28 28,

Malaysia 1800 887710, Mexico 01 800 010 0793,

Netherlands 31 (0) 348 433 466, New Zealand 0800 553 322,

Norway 47 (0) 66 90 76 60, Poland 48 22 3390150,

Portugal 351 210 311 210, Russia 7 495 783 6851,

Singapore 1800 226 5886, Slovenia 386 3 425 42 00,

South Africa 27 0 11 805 8197, Spain 34 91 640 0085,

Sweden 46 (0) 8 587 895 00, Switzerland 41 56 2005151,

Taiwan 886 02 2377 2222, Thailand 662 278 6777,

Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545

© National Instruments Corp. 21 NI 9425 Operating Instructions and Specifications

National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms

of Use section on ni.com/legal for more information about National Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering

National Instruments products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt

file on your media, or the National Instruments Patent Notice at ni.com/patents .

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–

2008 National Instruments Corp. All rights reserved.

373782E-01 Sep08