Allen-Bradley 1771-OY PLC-5 Digital Output Module

Allen-Bradley 1771-OY PLC-5 Digital Output Module is a discrete I/O module designed for the PLC-5 1771-series backplane. This module provides contact-type outputs that switch field devices under control of the PLC-5 processor, enabling local control of relays, solenoids, indicators, and other actuated loads from a PLC-5 program. As part of the Bulletin 1771 I/O family, the 1771-OY shares common electrical interface conventions with other PLC-5 output modules and is housed in a standard PLC-5 rack/backplane assembly. The device is intended for industrial control applications requiring reliable digital outputs to drive electromechanical devices, with mounting and connectivity aligned to the 1771 I/O architecture for seamless integration with ladder logic and PLC-5 I/O addressing. In typical installations, the 1771-OY works alongside other 1771 modules to form a compact controller I/O rack, enabling synchronous operation across inputs and outputs and supporting straightforward wiring with field devices. The rugged construction and legacy compatibility of the 1771 family make the 1771-OY a practical choice for maintaining and expanding existing PLC-5 control systems in manufacturing environments.