National Instruments Network Card NI 9425 User Manual

OPERATING INSTRUCTIONS AND SPECIFICATIONS  
NI 9425  
32-Channel, 24 V Sinking Digital Input Module  
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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 Vpk 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.  
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Caution When module terminals are hazardous voltage  
LIVE (>42.4 Vpk/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.  
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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.  
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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.  
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Connecting the NI 9425  
The NI 9425 has a 37-pin DSUB connector that provides  
connections for 32 simultaneously-sampled digital input channels.  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
DI0  
DI1  
DI2  
DI3  
DI4  
DI5  
DI6  
DI7  
DI16  
DI17  
DI18  
DI19  
DI20  
DI21  
DI22  
DI23  
COM  
COM  
DI24  
DI25  
DI26  
DI27  
DI28  
DI29  
DI30  
DI31  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
COM  
COM  
DI8  
DI9  
DI10  
DI11  
DI12  
DI13  
DI14  
DI15  
NC  
Figure 1. NI 9425 Pin Assignments  
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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.  
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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.  
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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.  
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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 kΩ 5%  
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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 time1.........................................0 μs min  
Setup time2........................................1 μs min  
Update/transfer time3  
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.  
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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)  
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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 Vrms, 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.  
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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  
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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.  
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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 grms, 10 to 500 Hz  
Sinusoidal (IEC 60068-2-6) .......5 g, 10 to 500 Hz  
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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  
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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.  
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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  
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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  
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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  
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