National Instruments NI 9472 Operating Instructions Manual
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National Instruments NI 9472 Operating Instructions Manual

8-channel digital output modules
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OPERATING INSTRUCTIONS
NI 9472/9474
8-Channel Digital Output Modules

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Summary of Contents for National Instruments NI 9472

  • Page 1 OPERATING INSTRUCTIONS NI 9472/9474 8-Channel Digital Output Modules...

  • Page 2: Safety Guidelines

    These operating instructions describe how to use the National Instruments NI 9472 and the NI 9474. In this document, the NI 9472 with screw terminal and NI 9472 with DSUB are referred to inclusively as the NI 9472. For information about installing, configuring, and programming the system, refer to the system documentation.

  • Page 3: Safety Guidelines For Hazardous Voltages

    Safety Guidelines for Hazardous Voltages You can connect hazardous voltages to the NI 9472 with screw terminal and the NI 9474 only. Do not connect hazardous voltages to the NI 9472 with DSUB. If hazardous voltages are connected to the module, take the following precautions.

  • Page 4: Safety Guidelines For Hazardous Locations

    Figure 1. NI 9932 Connector Safety Guidelines for Hazardous Locations The NI 9472/9474 is suitable for use in Class I, Division 2, Groups A, B, C, D, and T4 hazardous locations; Class I, Zone 2, AEx nC IIC T4 and Ex nC IIC T4 hazardous locations; and nonhazardous locations only.
  • Page 5 NI 9472/9474 in a potentially explosive environment. Not following these guidelines may result in serious injury or death. Do not disconnect I/O-side wires or connectors Caution unless power has been switched off or the area is known to be nonhazardous.
  • Page 6 Power supply and module cables must be separated on opposite sides of the enclosure, and must enter/exit through opposing enclosure walls. NI 9472/9474 Operating Instructions ni.com...
  • Page 7 The NI 9472 with DSUB has a 25-pin DSUB connector. Each channel of the NI 9472/9474 has a terminal or pin, DO, to which you can connect the device. Each channel has an LED that indicates the state of the channel.
  • Page 8 Table 1. Terminal Assignments Module Terminal Signal Supply (V Common (COM) NI 9472/9474 Operating Instructions ni.com...
  • Page 9 Vsup Vsup Vsup Vsup Vsup Vsup Vsup Vsup Figure 2. Pin Assignments © National Instruments Corp. NI 9472/9474 Operating Instructions...

  • Page 10: Wiring For High Vibration Applications

    NI 9932 backshell kit to protect the connections when you use the NI 9472 with screw terminal or the NI 9474 in high-vibration applications. Refer to Figure 3 for an illustration.
  • Page 11 You can connect sinking-input devices, such as NPN, open collectors, normally high, IEC negative logic, or other DC devices to the NI 9472/9474. A sinking-input device provides a path to ground for current or voltage. Make sure the device you connect to the NI 9472/9474 meets the module specifications.
  • Page 12 Supply Device NI 9472/9474 Figure 4. Connecting a Device to the NI 9472/9474 When the channel is on, the channel LED is on and the terminal or pin associated with the channel drives a current or applies a voltage to the device. When the channel is off, the channel LED is off and the terminal or pin does not drive current or apply voltage to the device.

  • Page 13: Sleep Mode

    Refer to the Specifications section for more information about power consumption and thermal dissipation. I/O Protection The NI 9472/9474 is short-circuit proof in accordance with IEC 1131-2 and provides overcurrent protection. © National Instruments Corp. NI 9472/9474 Operating Instructions...
  • Page 14 Understanding Short-Circuit-Proof Devices Each channel on the NI 9472/9474 has circuitry that protects it from current surges resulting from short circuits. Whether the module suffers damage from these overcurrent conditions depends on the following factors: • The amount of current through the channel •...

  • Page 15: Detecting An Overcurrent Condition

    NI 9472/9474. If the power supply you are using with the NI 9472/9474 cannot supply more than the guaranteed trip current, the module may be damaged if a short-circuit condition occurs.

  • Page 16: Resetting Channels After An Overcurrent Condition

    The following specifications are typical for the range – 40 to 70 °C unless otherwise noted. All voltages are relative to COM unless otherwise noted. The specifications are the same for the NI 9472 and the NI 9474 unless otherwise noted.
  • Page 17 · R ) ..... 0.13 Ω max; 0.07 Ω typ Output impedance (R Continuous output current (I NI 9472........0.75 A max per channel NI 9474........1 A max per channel I/O protection Voltage........30 V max Reversed voltage ......None...
  • Page 18 Output delay time (full load) NI 9472........100 µs max NI 9474........1 µs max MTBF NI 9472........1,113,301 hours at 25 °C; Bellcore Issue 6, Method 1, Case 3, Limited Part Stress Method NI 9474........479,889 hours at 25 °C;...
  • Page 19 Go to ni.com/certification search by module number for more information about MTBF and other product certifications. NI 9472 Power Requirements Power consumption from chassis Active mode ....... 230 mW max Sleep mode ......... 0.4 mW max Thermal dissipation (at 70 °C) Active mode .......

  • Page 20: Physical Characteristics

    (4.4 to 5.3 lb · in.) Ferrules ..........0.25 mm to 2.5 mm Weight NI 9472 with screw terminal/NI 9474 ....Approx. 150 g (5.3 oz) NI 9472 with DSUB....Approx. 145 g (5.1 oz) NI 9472/9474 Operating Instructions ni.com...
  • Page 21 Safety NI 9472 with Screw Terminal and NI 9474 Safety Voltages Channel-to-COM ......30 V max Isolation Channel-to-channel ....No isolation between channels Channel-to-earth ground Continuous ......250 V Measurement Category II Withstand ......2,300 V , verified by a 5 s...
  • Page 22 NI 9472 with DSUB Safety Voltages Channel-to-COM ......30 V max Isolation Channel-to-channel ....No isolation between channels Channel-to-earth ground Continuous ......60 VDC, Measurement Category I Withstand ......1,000 V , verified by a 5 s dielectric withstand test...
  • Page 23 Safety Standards The NI 9472/9474 is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use: • EN 61010-1, IEC 61010-1 • UL 61010-1 • CAN/CSA-C22.2 No. 61010-1 For UL and other safety certifications, refer to the...
  • Page 24 Europe (DEMKO)......EEx nC IIC T4 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 installation instructions for the chassis you are using for more information about meeting these specifications.

  • Page 25: Shock And Vibration

    Pollution Degree (IEC 60664) ..2 Shock and Vibration To meet these specifications, you must panel mount the system and, for the NI 9472 with screw terminal and NI 9474, affix ferrules to the ends of the terminal wires. Operating vibration, random (IEC 60068-2-64) ....
  • Page 26 Note this product for any additional regulatory compliance information. To obtain the DoC for this product, visit , search by module number or ni.com/certification product line, and click the appropriate link in the Certification column. NI 9472/9474 Operating Instructions ni.com...

  • Page 27: Where To Go For Support

    Where to Go for Support The National Instruments Web site is your complete resource for technical support. At you have access to ni.com/support everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers.
  • Page 28 Switzerland 41 56 200 51 51, Taiwan 886 02 2377 2222, Thailand 662 278 6777, United Kingdom 44 0 1635 523545 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.

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