Allen-Bradley 1771-OZL 1771 Digital I/O Relay Contact Output Module

Description

The Allen-Bradley 1771-OZL is an 8-channel digital relay contact output module designed to provide reliable switching control within the PLC-5 system architecture. It offers dry contacts that eliminate leakage current, preventing accidental energization of highly sensitive load devices. The 1771-OZL module functions as an effective interface between control logic and field devices, providing electrical isolation and robust signal switching for industrial automation processes.

Features

• Zero Leakage Current: Dry contact outputs eliminate solid-state leakage currents, ensuring high-sensitivity load devices remain de-energized when contacts are open.
• Individually Isolated Channels: Features 8 channels with independent contact isolation, allowing for diverse voltage reference routing.
• Robust Diagnostic Indicators: Active LED indicators on the front panel provide real-time status display of each relay channel for simplified maintenance.
• Secure Connection System: Compatible with standard Allen-Bradley I/O chassis swing arms to simplify wiring and field replacement.

Applications

• High-sensitivity relay and coil control
• Interlocking and safety signal isolation circuits
• Solenoid and contactor pilot duty switching
• DCS and PLC interface systems in process industries

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Chassis Insertion: Power down the I/O chassis before inserting or removing the module. Align the module with the card guides and slide firmly into the backplane connector.
• Wiring Arm: Use the designated 1771 wiring arm to land field wiring safely without disconnecting individual conductors from the terminal strip during module replacement.
• Routing: Maintain physical separation between low-voltage signal lines and high-voltage AC/DC power cables to mitigate electromagnetic interference.