NI-9477

The NI-9477 is a 32-channel C Series sinking digital output module for CompactDAQ and CompactRIO systems. It interfaces with industrial loads such as relays, solenoids and motors.

ManufacturerNational Instruments

ModelNI-9477

Part Number780174-01

Product TypeSinking digital output module

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Outputs32 sinking digital outputs

Signal compatibility5–60 V

Connection37-pin D-Sub

Module current limit20 A total maximum

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Overview

Product overview

Key product information and technical features.

Designed for industrial digital output tasks, the NI-9477 switches load current through sinking outputs. Channels can be connected in parallel for higher-current loads within NI's channel and module limits.

The NI-9477 uses serial digital communication. In CompactDAQ systems it cannot access the chassis onboard counters; select a supported parallel digital module when counter access is required.

Output-only design with no digital input or bidirectional channels.
Channel-to-earth isolation for industrial signal interfacing.
Parallel channel wiring supports higher-current load control within specified limits.

Verified specifications

Technical data

Verified product specifications.

Digital output channels	32 channels
Output type	Sinking
External supply voltage	0–60 VDC
Continuous current per channel	1 maximum on up to 20 channels; total module limit applies A
Continuous current, module total	20 maximum A
Channel-to-earth continuous isolation	60, Measurement Category I VDC
Channel-to-channel isolation	None
Short-circuit protection	None
Operating temperature	-40 to 70 °C