NI-9477 (National Instruments NI)

Location: C Series 32-channel, Drain Output (Sinking) Digital Output Module, used in CompactDAQ / CompactRIO industrial measurement and control systems

Core Parameters (Simplified Version)

Channels: 32 digital outputs (DO)

Type: Drain output (Sinking), current flows into the module

Voltage range: 0–60 VDC (supports 12/24/48 V industrial levels)

Single channel current: Maximum 1 A continuous

Module total current: Up to 20 A (multi-channel parallel connection)

Response time: 8 μs (high speed)

Isolation: Channel-to-ground 1,000 Vrms isolation, 60 VDC withstand voltage

Connection: 37-pin D‑Sub interface

Coating: Triple protection conformal coating, suitable for humid / harsh environments

Order numbers: 779517‑01, 780174‑01

Key features

Direct drive: Relays, solenoids, small motors, etc. for industrial actuators.

Flexible current expansion: Parallel connection of channels can increase the single-load drive current (e.g. 4 in parallel ≈ 4 A).

Wide temperature ruggedization: Industrial-grade temperature and vibration resistance design, suitable for field measurement and control.

Typical applications

Industrial automation I/O control

Test system actuator driver

Equipment control and relay array

High-reliability digital output scenarios