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NI 9423 Signals

Each channel of the NI 9423 has a DI terminal or pin to which

you can connect voltage or current signals. The NI 9423 also has

COM, a common terminal or pin that is internally connected to

the isolated ground reference of the module.
The NI 9423 has sinking inputs, meaning that when the external

device drives current or applies voltage to the DI terminal or pin,

DI provides a path to COM for the current or voltage. The

NI 9423 internally limits current signals connected to DI.

Connecting Sourcing-Output Devices

You can connect 2-, 3-, and 4-wire sourcing-output devices to the

NI 9423. A sourcing-output device drives current or applies

voltage to DI. An example of a sourcing-output device is an open

collector PNP.
Connect the output of the sourcing-output device to DI on the

NI 9423. Connect the common of the external device to the COM

terminal or pin.

NI 9423 Getting Started Guide

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© National Instruments

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Содержание 5174

Страница 1: ...NI 9423...

Страница 2: ...9423 8 Channel Sinking Digital Input Module This document explains how to connect to the NI 9423 In this document the NI 9423 with screw terminal and the NI 9423 with spring terminal are referred to i...

Страница 3: ...for each component in the system to determine the safety and EMC ratings for the entire system Safety Guidelines Operate the NI 9423 only as described in this document Caution Do not operate the NI 94...

Страница 4: ...s 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 cont...

Страница 5: ...electric withstand test Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system This category refers to local level electrical distri...

Страница 6: ...idelines 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 m...

Страница 7: ...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 9423 in Gas Group IIC hazardous locations you must use the device...

Страница 8: ...uct specifications These requirements and limits provide reasonable protection against harmful interference when the product is operated in the intended operational electromagnetic environment This pr...

Страница 9: ...ne 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 Cauti...

Страница 10: ...068 2 2 40 C to 70 C Operating humidity IEC 60068 2 78 10 RH to 90 RH noncondensing Pollution Degree 2 Maximum altitude 2 000 m Indoor use only Note Refer to the device datasheet on ni com manuals for...

Страница 11: ...0 3 4 7 0 1 2 3 4 5 6 7 8 9 DI0 DI1 DI2 DI3 DI4 DI5 DI6 DI7 NC COM 0 4 3 2 1 5 6 9 8 7 Note You must use 2 wire ferrules to create a secure connection when connecting more than one wire to a single t...

Страница 12: ...terminal or pin DI provides a path to COM for the current or voltage The NI 9423 internally limits current signals connected to DI Connecting Sourcing Output Devices You can connect 2 3 and 4 wire so...

Страница 13: ...rent that is in the input ON range to DI The channel registers as OFF when the device applies a voltage or drives a current that is in the input OFF range to DI If no device is connected to DI the cha...

Страница 14: ...is subject to high vibration NI recommends that you follow these guidelines to protect connections to the NI 9423 Use ferrules to terminate wires to the detachable connector Use the NI 9927 backshell...

Страница 15: ...tware CompactRIO NI CompactDAQ RELATED INFORMATION C Series Documentation Resources ni com info cseriesdoc Services ni com services NI 9423 Datasheet NI RIO Help LabVIEW FPGA Help NI 9423 Datasheet NI...

Страница 16: ...al Instruments 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...

Страница 17: ...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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