NI 9422 24 V to 60 V, Sinking/Sourcing Digital Input, 8 Ch Module

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  • 8-channel, 250 µs digital input
  • 24 V up to 60 V, sinking/sourcing digital inputs
  • Compatible with NI CompactDAQ counters
  • 250 Vrms channel-to-channel, CAT II isolation
  • 16-position screw-terminal connector
  • -40 °C to 70 °C operating, 5 g vibration, 50 g shock
  • Configure Complete CompactRIO or NI CompactDAQ System
  • View Data Sheet
  • View Support Resources
The NI 9422 is an 8-channel, 250 µs sinking/sourcing digital input module. Each channel accommodates 24 V up to 60 V digital input signals and features channel-to-channel isolation for the highest level of safety for automotive and industrial environments. Any discrete level connected to the NI 9422 under 5 V registers as a digital low and any discrete level between 11 V and 60 V registers as a digital high. The NI 9422 features 1,390 Vrms transient overvoltage protection between the input channels, 250 Vrms continuous channel-to-channel isolation, and 250 Vrms continuous isolation between each channel and earth ground. The NI 9422 works with a variety of industrial logic levels and signals to directly connect to a wide array of industrial and automotive switches, transducers, and devices.

The NI 9422 module is a correlated digital module, so it can perform correlated operations, triggering, and synchronization when installed in an NI CompactDAQ chassis.

Recommended Accessories
-NI 9939 backshell for 16-position connector block

Box Contents
-1 NI 9422 C Series module
-1 NI 9422 Operating Instructions and Specifications manual
-1 NI 9975 16-position screw-terminal connector block

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Specifications Documents

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Specifications Summary


To use the NI 9422 , you need all items in the diagram below. Select Option 1 if you already own a C Series System, or Option 2 if you do not already own a chassis, controller, or software.

Roll over the icons below to learn why you need each item in the system

C Series System

1 Connectivity Accessories

NI 9422




NI 9422 and Accessories Only
NI 9422 - 779522-01 Qty $ 181 each
Required Accessories
Connectivity Accessories -
Qty $ 31 each
Optional Accessories
Connector Block
Qty $ 31 each

Subtotal: $ 212

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Select a Platform and Configure a System

Create a complete system with the NI 9422 and its accessories. However, the NI 9422 is compatible with multiple C Series Platforms, NI CompactDAQ and CompactRIO. Please review the comparison information below and select a platform to begin configuring your system.

Configure System Configure System

NI CompactDAQ NI CompactRIO
Mixed-Measurement Data Acquisition

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Time-Critical Control & Monitoring

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Features NI CompactDAQ NI CompactRIO
USB, Wi-Fi, Ethernet, Headless Operation Ethernet, Headless Operation
Up to -40 to 70 C
Up to 50 g shock and 5 grms operational vibration
Up to -40 to 70 C
Up to 50 g shock and 5 grms operational vibration
LabVIEW, LabVIEW Real-Time, C, C++, VB.NET, C#.NET LabVIEW, LabVIEW Real-Time, LabVIEW FPGA, C, C++
NI-DAQmx driver; configuration and troubleshooting tools; short time to first measurement NI-RIO driver; flexibility and customizabilty
PC-based data acquisition; embedded data-logging; portable and benchtop Single-point acquisition; closed-loop control; deterministic operation

System Assurance Programs

Reduce your setup time and total cost of ownership, and get a system you can use out of the box with National Instruments system assurance programs. System assurance programs include:

  • Installation and integration test of all individual hardware
  • Courtesy installation of system driver sets and application development environments
  • Extended warranty and calibration coverage for up to five years
  • Custom documentation plus a custom restore and startup utility

This service is only available for PXI, NI CompactRIO, and NI Compact FieldPoint systems.

Extended Warranties

National Instruments designs and manufactures all products to minimize failures, however unexpected failures can still occur. Extended warranties provide a fixed economical price at the time of system purchase, covering any repair costs for up to three years. In addition, they offer the following benefits:

  • Significant cost savings compared to individual repair incidents
  • Fault location, diagnostics, and repair by NI any time the system product fails
  • All parts and labor costs covered as well as any adjustments needed to restore the hardware to manufacturing specifications

For more information about your warranty options:


NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. NI provides manual calibration procedures, services to recalibrate your products, and automated calibration software to calibrate many NI measurement products.


NI training is the fastest, most certain route to productivity with NI tools and successful application development.

Repair Services

Return your registered product under warranty at no additional labor and parts cost. NI offers fault location, diagnostics, and repair any time the system fails as well as any adjustments needed to restore the hardware to manufacturing specifications.

Technical Support

Additional Product Information

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