National Instruments NI 9229 C Series voltage input module

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National Instruments · CompactDAQ and CompactRIO

NI 9229

The NI 9229 is a four-channel differential voltage input module with a ±60 V range, 24-bit resolution and simultaneous sampling at up to 50 kS/s per channel.

ManufacturerNational Instruments

ModelNI 9229

Part Number779785-01

Product TypeC Series voltage input module

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Inputs4 differential analog inputs

Measurement range±60 V

Resolution24 bits

SamplingSimultaneous, up to 50 kS/s/channel

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Overview

Product overview

Key product information and technical features.

The NI 9229 fits NI CompactDAQ and CompactRIO measurement systems. Each input has an independent signal path and ADC, enabling simultaneous acquisition across all four channels.

Its floating, isolated inputs help reduce ground-loop measurement errors. NI identifies 779785-01 as the screw-terminal version; connector and isolation ratings differ between versions.

Simultaneous differential voltage acquisition.
Channel-to-channel isolation.
Analog and digital anti-alias filtering.
Independent delta-sigma ADCs for the input channels.

Verified specifications

Technical data

Verified product specifications.

Differential input channels	4 channels
Nominal input range	-60 to +60 V
ADC resolution	24 bits
Sampling mode	Simultaneous
Internal-timebase data rate	1.613 to 50 kS/s/channel
Input coupling	DC
Differential input impedance	1 MΩ
Operating temperature	-40 to +70; observe chassis environmental requirements °C
Front connection for 779785-01	Screw terminal

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National Instruments

Manufacturer

CompactDAQ / CompactRIO

Host measurement platforms

NI 9229

C Series voltage acquisition module

Compatibility

Designed for use in NI CompactDAQ and CompactRIO systems; verify support for the specific chassis and software configuration.

Confirm the installed connector variant and consult its safety limits before wiring. Isolation ratings are not the measurement range.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI-9229 Product PageManufacturer Product Page · ni.com

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NI 9229 DatasheetDatasheet · download.ni.com

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NI-9229 Dimensional DrawingsDrawings And CAD Models · ni.com

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NI-9229 Product CertificationsTechnical resource

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Is the NI 9229 an analog output module?

No. It measures voltage through four differential analog input channels; it is not a 4–20 mA current output module.

Does 50 kS/s apply to each channel?

Yes. The specified maximum is 50 kS/s per channel, with simultaneous sampling.

What isolation ratings apply to screw-terminal and BNC versions?

The datasheet specifies 250 Vrms CAT II continuous isolation for the screw-terminal version and 60 VDC CAT I for BNC, both channel-to-channel and channel-to-earth. Additional restrictions apply in hazardous locations.