National Instruments NI-9476 Sourcing digital output module

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National Instruments · CompactDAQ / CompactRIO

NI-9476

The NI-9476 is a 32-channel C Series sourcing digital output module for industrial signals powered by an external 6–36 V DC supply. This catalog record identifies the D-Sub version, part number 779140-01.

ManufacturerNational Instruments

ModelNI-9476

Part Number779140-01

Product TypeSourcing digital output module

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Outputs32 sourcing digital output channels

External supply6–36 V DC

Field connection37-pin D-Sub

Per-channel timing500 µs minimum interval between state changes

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Overview

Product overview

Key product information and technical features.

The NI-9476 provides industrial-level digital outputs within the NI C Series ecosystem. Its output signal range depends on the external supply, and each channel includes protection whose overcurrent and short-circuit status can be monitored programmatically.

NI lists the NI-9476 in its CompactDAQ and CompactRIO hardware compatibility resources. Select the chassis, software and operating mode using the official compatibility guidance rather than assuming that all C Series configurations are interchangeable.

32 sourcing outputs for industrial digital signals.
Supports signal levels from 6 V to 36 V according to the external power supply.
Programmatic monitoring of each channel's overcurrent and short-circuit protection status.
Transient overvoltage protection between output channels and the backplane.

Verified specifications

Technical data

Verified product specifications.

Digital output channels	32 channels
Output type	Sourcing
External supply voltage	6–36 V DC
Continuous current per channel, 6–30 V DC supply	250 maximum mA
Continuous current per channel, 30–36 V DC supply	200 maximum mA
Propagation delay	500 maximum µs
Serial update-command interval	40 µs
Field connector	37-pin D-Sub
D-Sub channel-to-earth isolation	60 V DC continuous, Measurement Category I
Channel-to-channel isolation	None
Power-on output state	Channels off

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National Instruments

Manufacturer

C Series

Modular I/O family

CompactDAQ / CompactRIO

System platforms covered by NI compatibility guidance

NI-9476

32-channel sourcing digital output module

Check chassis and software support; do not apply spring-terminal variant isolation ratings to this D-Sub version.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI-9476 Official Product PageProduct Page · ni.com

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NI 9476 DatasheetDatasheet · download.ni.com

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NI-9476 Dimensional DrawingsDimensional Drawings And CAD Models · ni.com

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NI-9476 Update Rate and Propagation DelayTechnical resource

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C Series CompactDAQ and CompactRIO Hardware CompatibilityTechnical resource

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FAQ

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Product-specific answers based on available technical information.

Does the NI-9476 require an external power supply?

Yes. The specified external supply range is 6–36 V DC, and output signal levels depend on that supply.

Why does NI document both 40 µs and 500 µs timing values?

NI distinguishes serial update commands from output propagation. Commands can be sent every 40 µs, but a channel must wait 500 µs before changing state again. An update command can address multiple channels together.

Which connection accessories does NI list for part 779140-01?

NI lists the NI-9923 front-mount terminal block, SH37F-37M cable and DB37F-DB37M LP cable as compatible accessories for this part number.