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NI-9474 Getting Started NI-9474 Nomenclature In this article, the NI-9474 with screw terminal and NI-9474 with spring terminal are referred to inclusively as the NI-9474. The information in this document applies to all versions of the NI-9474 unless otherwise specified.
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Connecting Digital Devices You can connect a variety of industrial devices, such as solenoids, motors, actuators, relays, and lamps to the NI-9474. You must connect an external power supply to the NI-9474. The power supply provides the current for the output channels.
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Increasing Current Drive Each channel of the NI-9474 has a continuous output current of 1.0 A. If you want to increase the output current to a device, you can connect any number of channels together in parallel.
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Power Supply NI 9474 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-9474: Use ferrules to terminate wires to the detachable connector. ■ Use the NI-9927 backshell kit with the NI-9474 with screw terminal or the ■...
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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-9474. If the power supply you are using with the NI-9474 cannot supply more than 14 A, the module may be damaged if a short circuit condition occurs.
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