National Instruments NI 9222 C Series Voltage Input Module
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National Instruments · CompactDAQ and CompactRIO

NI 9222

The NI 9222 is a four-channel C Series voltage input module with simultaneous differential acquisition, 16-bit resolution and a maximum sampling rate of 500 kS/s per channel. It measures analog signals rather than generating analog outputs.

ManufacturerNational Instruments
ModelNI 9222
Part Number781397-01
Product TypeC Series Voltage Input Module
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Channels4 differential analog inputs
Resolution16 bits
SamplingSimultaneous, up to 500 kS/s per channel
Nominal input range±10 V
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Overview

Product overview

Key product information and technical features.

Each input channel has an independent signal path and ADC, allowing all four channels to be sampled simultaneously. This architecture supports time-aligned acquisition of rapidly changing voltage signals.

The module fits NI CompactDAQ and CompactRIO measurement systems. Sampling performance depends on the acquisition method: NI specifies 500 kS/s for CompactDAQ with NI-DAQmx and CompactRIO FPGA User-Controlled I/O Sampling, versus 300 kS/s with CompactRIO FPGA I/O Nodes.

  • Independent ADCs enable simultaneous acquisition across four differential input channels.
  • 16-bit successive approximation register (SAR) conversion.
  • ±30 V input overvoltage protection.
  • 60 VDC continuous channel-to-channel isolation, Measurement Category I.
Verified specifications

Technical data

Verified product specifications.

Analog input channels4 differential
ADC resolution16 bits
Nominal input voltage range±10 V
Maximum sampling rate per channel500; CompactDAQ NI-DAQmx or CompactRIO FPGA User-Controlled I/O Sampling kS/s
CompactRIO FPGA I/O Nodes maximum sampling rate300 kS/s
Input impedance>1 GΩ
Operating temperature-40 to 70 °C
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National Instruments

Manufacturer

CompactDAQ / CompactRIO

Host measurement platforms

NI 9222

C Series simultaneous voltage acquisition module

CompactDAQ acquisition

NI-DAQmx sampling up to 500 kS/s per channel.

Check the exact chassis, software version and acquisition method in NI's compatibility resources before system integration.
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Is the NI 9222 an analog input or output module?

It is an analog input module with four differential voltage measurement channels. It is not an analog output module.

Is the 500 kS/s rate shared across the channels?

No. The maximum rate is 500 kS/s per channel with simultaneous sampling. CompactRIO FPGA I/O Nodes have a lower specified maximum of 300 kS/s.

Which connector variant corresponds to 781397-01?

NI identifies 781397-01 as the screw-terminal variant. Confirm the part number on the actual module when matching wiring accessories.

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