National Instruments Ni-9472 Sourcing Digital Output Module User Guide (+ PDF)

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1 NI-9472 Sourcing Digital Output Module

2 Product Information

3 Product Usage Instructions

3.1 Safety Guidelines

3.1.1 Safety Voltages

3.1.1.1 NI 9472 with Screw Terminal and Spring Terminal Safety Voltages

3.1.1.2 NI 9472 with DSUB Safety Voltages

3.2 Documents / Resources

3.2.1 References

NI-9472 Sourcing Digital Output Module

Product Information

The NI-9927 Getting Started Guide provides instructions on how
to connect to the NI 9472, which is available in three versions: NI
9472 with screw terminal, NI 9472 with spring terminal, and NI 9472
with DSUB. The NI 9472 is an 8 DO (digital output) module that can
source 6 V to 30 V with a maximum of 100 s.

The safety guidelines provided in this document are specific to
the NI 9472. It is important to note that other components in the
system may not meet the same safety ratings as the NI 9472.
Therefore, it is recommended to refer to the documentation for each
component in the system to determine the safety and EMC ratings for
the entire system.

Product Usage Instructions

Before using the NI 9472, complete the software and hardware
installation procedures in your chassis documentation. Operate the
NI 9472 only as described in this document.

Safety Guidelines

Do not operate the NI 9472 in a manner not specified in this
document, as product misuse can result in a hazard. If the product
is damaged, return it to NI for repair.

Safety Voltages

Connect only voltages that are within the following limits:

NI 9472 with Screw Terminal and Spring Terminal Safety
Voltages

Channel-to-COM Isolation: 30 VDC maximum
Channel-to-channel Continuous: None
Channel-to-earth ground Withstand: 250 Vrms, Measurement
Category II
Channel-to-earth ground Withstand: 2,300 Vrms, verified by a 5
s dielectric withstand test

Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
Do not connect the NI 9472 to signals or use for measurements
within Measurement Categories III or IV.

NI 9472 with DSUB Safety Voltages

Channel-to-COM Isolation: 30 VDC maximum
Channel-to-channel Continuous: None
Channel-to-earth ground Withstand: 60 VDC, Measurement Category
I
Channel-to-earth ground 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. Do not connect the NI 9472 to signals
or use for measurements within Measurement Categories II, III, or
IV. Note that Measurement Categories CAT I and CAT O are equivalent
and are not intended for direct connection to the MAINS building
installations of Measurement Categories CAT II, CAT III, or CAT
IV.

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NI-9927

GETTING STARTED GUIDE
NI 9472
8 DO, 6 V to 30 V, Sourcing, 100 s

This document explains how to connect to the NI 9472. In this document, the NI 9472 with screw terminal, NI 9472 with spring terminal, and NI 9472 with DSUB are referred to inclusively as the NI 9472.
Note Before you begin, complete the software and hardware installation procedures in your chassis documentation.
Note The guidelines in this document are specific to the NI 9472. The other components in the system might not meet the same safety ratings. Refer to the documentation for each component in the system to determine the safety and EMC ratings for the entire system.
Safety Guidelines
Operate the NI 9472 only as described in this document.
Caution Do not operate the NI 9472 in a manner not specified in this document. Product misuse can result in a hazard. You can compromise the safety protection built into the product if the product is damaged in any
2 | ni.com | NI 9472 Getting Started Guide

way. If the product is damaged, return it to NI for repair.
Hazardous Voltage This icon denotes a warning advising you to take precautions to avoid electrical shock with the NI 9472 with screw terminal and the NI 9472 with spring terminal.

NI 9472 with Screw Terminal and Spring Terminal Safety Voltages
Connect only voltages that are within the following limits.

Channel-to-COM Isolation
Channel-to-channel Channel-to-earth ground
Continuous
Withstand

30 VDC maximum
None
250 Vrms, Measurement Category II 2,300 Vrms, verified by a 5 s dielectric withstand test

NI 9472 Getting Started Guide | © National Instruments | 3

Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system. This category refers to local-level electrical distribution, such as that provided by a standard wall outlet, for example, 115 V for U.S. or 230 V for Europe.
Caution Do not connect the NI 9472 to signals or use for measurements within Measurement Categories III or IV.

NI 9472 with DSUB Safety Voltages
Connect only voltages that are within the following limits.

Channel-to-COM Isolation
Channel-to-channel Channel-to-earth ground
Continuous
Withstand

30 VDC maximum
None
60 VDC, Measurement Category I 1,000 Vrms, verified by a 5 s dielectric withstand test

4 | ni.com | NI 9472 Getting Started Guide

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.
Caution Do not connect the NI 9472 to signals or use for measurements within Measurement Categories II, III, or IV.
Note Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.
Safety Guidelines for Hazardous Voltages
You can connect hazardous voltages only to the NI 9472 with screw terminal and the NI 9472 with spring terminal. Do not connect hazardous voltages to the NI 9472 with DSUB.
NI 9472 Getting Started Guide | © National Instruments | 5

If hazardous voltages are connected to the device, take the following precautions. A hazardous voltage is a voltage greater than 42.4 Vpk voltage 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 Ensure that devices and circuits connected to the module are properly insulated from human contact.
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. You must use the NI 9927 connector backshell kit with the NI 9472 with screw terminal and the NI 9981 connector backshell kit with the NI 9472 with spring terminal to ensure that the terminals are not accessible.
6 | ni.com | NI 9472 Getting Started Guide

Safety Guidelines for Hazardous Locations
The NI 9472 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4 and Ex nA IIC T4 hazardous locations; and nonhazardous locations only. Follow these guidelines if you are installing the NI 9472 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.
Caution For Division 2 and Zone 2 applications, install the system in an enclosure rated to at least IP54 as defined by IEC/EN 60079-15.
NI 9472 Getting Started Guide | © National Instruments | 7

Caution For Division 2 and Zone 2 applications, install a protection device between the Vsup and COM terminals on the NI 9472. The device must prevent the input Vsup-to-COM voltage from exceeding 42 V if there is a transient overvoltage condition.
Special Conditions for Hazardous Locations Use in Europe and Internationally The NI 9472 has been evaluated as Ex nA IIC T4 Gc equipment under DEMKO Certificate No. 03 ATEX 0324020X and is IECEx UL 14.0089X certified. Each NI 9472 is marked II 3G and is suitable for use in Zone 2 hazardous locations, in ambient temperatures of -40 °C Ta 70 °C. If you are using the NI 9472 in Gas Group IIC hazardous locations, you must use the device in an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.
Caution You must make sure that transient disturbances do not exceed 140% of the rated voltage.
Caution The system shall only be used in an area of not more than Pollution Degree 2, as defined in IEC 60664-1.
8 | ni.com | NI 9472 Getting Started Guide

Caution The system shall be mounted in an ATEX/IECEx-certified enclosure with a minimum ingress protection rating of at least IP54 as defined in IEC/EN 60079-15.
Caution The enclosure must have a door or cover accessible only by the use of a tool.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility (EMC) stated in the product specifications. These requirements and limits provide reasonable protection against harmful interference when the product is operated in the intended operational electromagnetic environment.
This product is intended for use in industrial locations. However, harmful interference may occur in some installations, when the product is connected to a peripheral device or test object, or if the product is used in residential or commercial areas. To minimize interference with radio and television reception and prevent unacceptable performance degradation, install and use this product in strict accordance with the instructions in the product documentation.
NI 9472 Getting Started Guide | © National Instruments | 9

Furthermore, any changes or modifications to the product not expressly approved by National Instruments could void your authority to operate it under your local regulatory rules.
Special Conditions for Marine Applications
Some products are Lloyd’s Register (LR) Type Approved for marine (shipboard) applications. To verify Lloyd’s Register certification for a product, visit ni.com/certification and search for the LR certificate, or look for the Lloyd’s Register mark on the product.
Caution In order to meet the EMC requirements for marine applications, install the product in a shielded enclosure with shielded and/or filtered power and input/output ports. In addition, take precautions when designing, selecting, and installing measurement probes and cables to ensure that the desired EMC performance is attained.
10 | ni.com | NI 9472 Getting Started Guide

Preparing the Environment
Ensure that the environment in which you are using the NI 9472 meets the following specifications.

Operating temperature

-40 °C to 70 °C

(IEC 60068-2-1, IEC 60068-2-2)

Operating humidity (IEC 60068-2-78)

10% RH to 90% RH, noncondensing

Pollution Degree

Maximum altitude

2,000 m

Indoor use only.
Note Refer to the device datasheet on ni.com/manuals for complete specifications.

NI 9472 Getting Started Guide | © National Instruments | 11

NI 9472 Pinout

DO0

DO1

DO2

DO3

DO4

DO5

DO6

DO7

Vsup

COM

DO0

DO1

DO2

DO3

DO4

DO5

DO6

DO7

Vsup 8

COM 9

DO0 Vsup DO1 DO2 Vsup DO3 DO4 Vsup DO5 DO6 Vsup DO7

14 15 16 17 18 19 20 21 22 23 24 25

1 2 3 4 5 6 7 8 9 10 11 12 13

COM Vsup COM COM Vsup COM COM Vsup COM COM Vsup COM COM

12 | ni.com | NI 9472 Getting Started Guide

Note You must use 2-wire ferrules to create a secure connection when connecting more than one wire to a single terminal on the NI 9472 with screw terminal or NI 9472 with spring terminal.

Signal

Table 1. NI 9472 Signal Descriptions Description

COM DO Vsup

Common reference connection to isolated ground Digital output signal connection Voltage supply connection

LED Pattern

Table 2. LED Indicators Indication

Solid Off

The channel has been programmed to be in the ON state.
The channel has been programmed to be in the OFF state.

Connecting Digital Devices
You can connect a variety of industrial devices, such as solenoids, motors, actuators, relays, and lamps to the NI 9472. You must connect an external power supply to the NI 9472. The power supply provides the current for the output channels.
Figure 1. Connecting an Industrial Device to the NI 9472
Vsup

NI 9472

COM

Device

+ External Power
Supply

Caution Do not install or remove C Series modules from your system if the external power supply connected to the Vsup and COM pins is powered on.

14 | ni.com | NI 9472 Getting Started Guide

Ensure that the devices you connect to the NI 9472 are compatible with the output specifications of the NI 9472. Refer to the device datasheet at ni.com/manuals for output specifications.
Note When the industrial device is off, DO is not connected to COM. For large source impedances, you must use a pull-down resistor between DO and COM. Visit ni.com/info and enter the Info Code CSeriesDOPulseGen for more information.
Increasing Current Drive
Each channel of the NI 9472 has a continuous output current of 0.75 A. If you want to increase the output current to a device, you can connect any number of channels together in parallel.
For example, if you want to drive 3 A of current, connect DO0 through DO3 in parallel, as shown in the following figure. You must turn all parallel channels on and off simultaneously so that the current on any single channel cannot exceed the 0.75 A rating.
NI 9472 Getting Started Guide | © National Instruments | 15

Figure 2. Increasing the Current to a Device Connected to the NI 9472

Vsup DO0 DO1

0.75 A 0.75 A

DO2 0.75 A

DO3 0.75 A 3 A

+ External Power
Supply

Device

NI 9472

COM

High-Vibration Application Connections
If your application is subject to high vibration, NI recommends that you follow these guidelines to protect connections to the NI 9472: · Use ferrules to terminate wires to the detachable connector. · Use the NI 9927 backshell kit with the NI 9472 with screw
terminal or the NI 9981 backshell kit with the NI 9472 with spring terminal.
16 | ni.com | NI 9472 Getting Started Guide

I/O Protection
The NI 9472 provides short-circuit protection. Each channel has circuitry that protects it from current surges resulting from short circuits over 14 A.
Note Refer to the device datasheet at ni.com/manuals for maximum continous output current, short-circuit behavior, and short-circuit trip time specifications and information about conditions that may damage the module. Note Refer to the IEC 61131-2 standard for more information about short-circuit-proof devices.
Note Because the NI 9472 includes internal flyback diodes, you do not need to add external diodes when connecting to switching devices that store energy.
NI 9472 Getting Started Guide | © National Instruments | 17

Power Supplies and Overcurrent Conditions
If a short circuit occurs, the current through DO can exceed the current rating for the power supply and the maximum continuous output current for the NI 9472.
If the power supply you are using with the NI 9472 cannot supply more than 14 A, the module may be damaged if a short circuit condition occurs.
Detecting an Overcurrent Condition
If a device connected to the module is not working while the channel is on, the module channel may be in an overcurrent state. Neither the software nor the module LEDs indicate if an overcurrent condition occurs. A channel LED may be on even if the channel is off because of an overcurrent condition.
To determine if the channel is in an overcurrent state, measure the voltage between DO and Vsup. If the voltage is equal to the voltage of the external power supply connected to the module, the channel is in an overcurrent state.
18 | ni.com | NI 9472 Getting Started Guide

Resetting Channels after an Overcurrent Condition
After you have determined and fixed the cause of an overcurrent condition, reset the channel by turning it off. Alternatively, you can disconnect the external power supply from the chassis. However, doing so disconnects power from all the module channels. Normal operation can resume after you correct the overcurrent condition and reset the channel.
NI 9472 Getting Started Guide | © National Instruments | 19

Where to Go Next
CompactRIO

NI CompactDAQ

NI 9472 Datasheet NI-RIO Help LabVIEW FPGA Help

NI 9472 Datasheet NI-DAQmx Help LabVIEW Help

RELATED INFORMATION

C Series Documentation & Resources ni.com/info cseriesdoc

Services ni.com/services

Located at ni.com/manuals

Installs with the software

20 | ni.com | NI 9472 Getting Started Guide

Worldwide Support and Services
The NI website 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.
Visit ni.com/services for NI Factory Installation Services, repairs, extended warranty, and other services.
Visit ni.com/register to register your NI product. Product registration facilitates technical support and ensures that you receive important information updates from NI.
A Declaration of Conformity (DoC) is our claim of compliance with the Council of the European Communities using the manufacturer’s declaration of conformity. This system affords the user protection for electromagnetic compatibility (EMC) and product safety. You can obtain the DoC for your product by visiting ni.com/certification. If your product supports calibration, you can obtain the calibration certificate for your product at ni.com/calibration.
NI 9472 Getting Started Guide | © National Instruments | 21

NI corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. NI also has offices located around the world. For telephone support in the United States, create your service request at ni.com/support or dial 1 866 ASK MYNI (275 6964). For telephone support outside the United States, visit the Worldwide Offices section of ni.com/niglobal to access the branch office websites, which provide up-to-date contact information, support phone numbers, email addresses, and current events.
Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for information on NI trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering NI 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. You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/ export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S. Government Customers: The data contained in this manual was developed at private expense and is subject to the applicable limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.
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