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

NI-9239

The NI-9239 provides four differential ±10 V analog inputs with 24-bit resolution and simultaneous sampling at up to 50 kS/s per channel. It is a C Series module for CompactDAQ and CompactRIO systems.

ManufacturerNational Instruments
ModelNI-9239
Product TypeC Series Voltage Input Module
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Inputs4 differential channels
Voltage range±10 V
Resolution24-bit
SamplingSimultaneous, up to 50 kS/s/ch
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Overview

Product overview

Key product information and technical features.

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

Connector and isolation specifications vary by part number. The supplied catalog tag and legacy connector description conflict, so the exact hardware variant must be confirmed before choosing wiring or applying isolation limits.

  • Independent signal paths and ADCs support simultaneous acquisition.
  • Analog and digital anti-alias filtering.
  • Channel-to-channel isolation with variant-dependent ratings.
Verified specifications

Technical data

Verified product specifications.

Differential analog input channels4 channels
Nominal input range-10 to +10 V
ADC resolution24 bits
Maximum sampling rate with internal timebase50 kS/s/ch
Sampling modeSimultaneous
Input couplingDC
Input impedance1 MΩ
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

Compatibility

NI documents use in CompactDAQ and CompactRIO systems; this does not establish compatibility with every chassis or software configuration.

Confirm the module part number, connector style, and applicable isolation limits before installation.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI-9239 Manufacturer 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 Product CertificationsTechnical resource
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Shipping, warranty & returns

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Warranty
30-Day Warranty. Standard coverage applies.
Returns
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Does the NI-9239 sample all four channels simultaneously?

Yes. Each channel has its own ADC and independent signal path.

Is this catalog item the BNC version?

The variant is not confirmed. NI identifies 780181-01 as BNC and 782402-01 as a conformal-coated screw-terminal variant. The catalog combines a BNC description with the 782402-01 tag.

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