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National Instruments NI 9239 C Series Voltage Input Module
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National Instruments · CompactDAQ / CompactRIO

NI 9239

The NI 9239 is a four-channel C Series voltage input module with differential inputs, 24-bit resolution and simultaneous sampling at 50 kS/s per channel. It provides a ±10 V input range and channel-to-channel isolation.

ManufacturerNational Instruments
ModelNI 9239
Part Number779593-01
Product TypeC Series Voltage Input Module
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Analog inputs4 differential channels
Resolution24-bit
Sample rate50 kS/s per channel
Input range±10 V
Input couplingDC
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Overview

Product overview

Key product information and technical features.

The NI 9239 performs isolated differential voltage measurements. Its floating input front end helps reduce measurement errors caused by ground loops.

Designed for CompactDAQ and CompactRIO systems, each channel has an independent ADC. Analog and digital filtering reject out-of-band signals.

  • Simultaneous acquisition across all four inputs.
  • Channel-to-channel isolation.
  • Delta-sigma conversion with analog prefiltering.
  • Anti-alias filtering.
Verified specifications

Technical data

Verified product specifications.

Analog input channels4 differential channels
ADC resolution24 bits
Sampling modeSimultaneous
Nominal input range±10 V
Data rates with internal timebase1.613 to 50; discrete rates kS/s/ch
Input couplingDC
Input impedance1 MΩ
Operating temperature-40 to 70; subject to chassis requirements °C
Condition & included items

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Condition

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Included

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Revision

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Compatibility

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National Instruments

Manufacturer

CompactDAQ / CompactRIO

System platforms

NI 9239

C Series voltage acquisition module

779593-01

Screw-terminal variant

Confirm the installed connector variant before applying isolation limits; screw-terminal and BNC versions have different ratings.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI-9239 Product PageProduct Page · ni.com
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NI 9239 DatasheetDatasheet · download.ni.com
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NI-9239 Dimensional DrawingsDimensional Drawings And CAD Models · ni.com
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NI-9239 Mechanical Drawings and CAD ModelsTechnical resource
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Warranty
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Returns
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Does the NI 9239 sample its channels simultaneously?

Yes. All four channels use independent ADCs for simultaneous sampling.

Does the NI 9239 offer selectable AC coupling?

No. NI specifies DC input coupling.

Which connector corresponds to part number 779593-01?

NI identifies 779593-01 as the screw-terminal version. Confirm the part number on the physical module.

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