Allen Bradley 1771-OR PLC-5 Isolated AC Output Module

Product Overview

The Allen Bradley 1771-OR functions as a specialized high-voltage output interface for the legacy PLC-5 system. It provides six independent, isolated channels designed to switch 220 VAC loads directly from the controller backplane. Despite its discontinued status by the manufacturer, we offer this unit in 100% Brand New and original factory condition, ensuring the continued operation of your mission-critical infrastructure without the need for expensive system migrations.

Technical Specifications

The 1771-OR utilizes a rugged 1771-series form factor to handle heavy industrial loads:

Engineering Advantages

• True Channel Isolation: The 1771-OR isolates each of its six outputs from one another. This design allows engineers to control multiple independent 220 VAC circuits with different phases or potential sources on a single card, drastically reducing the total hardware count in the chassis.

• High-Voltage Stability: Built specifically for 220 VAC environments, the internal circuitry resists voltage spikes and transients common in heavy industrial power grids. This prevents cross-talk between channels and ensures clean switching for solenoids and motor starters.

• Backplane Protection: The optical isolation barrier protects the expensive PLC-5 processor from field-side faults. If a surge occurs on the 220 VAC line, the module confines the damage to the output circuit rather than compromising the entire rack.

• Direct Replacement Utility: As an original 1771 series component, this module slides directly into any universal I/O slot. It requires no software reconfiguration or wiring changes when replacing an existing 1771-OR, making it the most efficient solution for maintenance and repair operations.

FAQs

Q: Can the 1771-OR handle different voltages on different channels simultaneously?

A: Yes. Because each of the 6 outputs features complete electrical isolation, you can switch different 220 VAC sources or phases across the module without risking a short circuit between channels.

Q: Does this module require a specific swing arm for wiring?

A: Yes, like most 1771 modules, it requires a 1771-series wiring arm. This design allows you to replace the module hardware without disconnecting individual field wires, reducing downtime during maintenance.

Q: How does the 1771-OR manage heat dissipation in a full chassis?

A: The module housing utilizes a ventilated design to promote natural convection. When switching high-current 220 VAC loads, ensure the chassis fan is operational to maintain the ambient temperature within the specified range for the PLC-5 system.

Q: Is this a refurbished or used unit?

A: No. This is a 100% Brand New original unit. We specialize in providing unused, factory-condition legacy hardware to guarantee maximum reliability for systems no longer supported by the original manufacturer.