Allen-Bradley 1771-OA | Digital AC Output Module

Product Overview

The 1771-OA AC Output Module by Allen-Bradley delivers reliable voltage output for industrial automation systems. It provides eight discrete output channels with a nominal voltage of 120VAC, supporting a range from 92 to 138VAC at 47–63 Hz.

This single-slot module is compatible with 1771 I/O chassis and uses the 1771-WA Field Wiring Arm for direct installation. Each output channel supports 1.5A continuous current, while the entire module handles up to 6A. Surge currents reach 4A per channel for 8.3 ms, ensuring stable operation under transient conditions.

The 1771-OA module draws 210 mA backplane current at 5VDC and supports BDC or natural binary data formats. Its typical AC signal delay is 45 ±15 ms, and DC signal delay is 50 ms, providing consistent performance for PLC-controlled applications.

Key Features

• AC output module for 1771 I/O systems and PLC5 controllers

• Eight discrete output channels delivering 92–138VAC, 47–63 Hz

• Continuous output current: 1.5A per channel, 6A per module

• Supports surge current: 4A per channel, repeatable every 1 second

• Single-slot installation with 1771-WA Field Wiring Arm

• Backplane current draw: 210 mA @ 5VDC

• Typical signal delays: AC 45 ±15 ms, DC 50 ms

• Compatible with rack-mounted 1771 I/O chassis

• Data format: BDC or natural binary

• Keying positions: 4–6 and 12–14 for safe module installation

Technical Specifications

Applications

The 1771-OA module is ideal for PLC-controlled industrial automation tasks requiring reliable AC output. Use it for machinery control, process automation, or production lines where precise voltage switching and stable output currents are critical. Its single-slot design and compatibility with 1771 I/O chassis make it easy to integrate into existing systems.

FAQ

Q1: Is the 1771-OA new and original?
A: Yes, the 1771-OA is fully new and original from Allen-Bradley.

Q2: How fast can it be shipped?
A: We have stock available. Shipping occurs within 3 days to 2 weeks, depending on order size, typically via DHL.

Q3: What is the output voltage range?
A: The module supports 92–138VAC, with a nominal output of 120VAC per channel.

Q4: What is the maximum current per channel?
A: Each output channel provides 1.5A continuous current, with the entire module up to 6A.

Q5: What installation method does it use?
A: The 1771-OA installs in a single-slot 1771 I/O chassis using the 1771-WA Field Wiring Arm.