Allen-Bradley 1771-0A Output Module

Allen-Bradley 1771-0A Output Module is a digital output module for the 1771 I/O family used with PLC-5 systems, providing eight 120V AC outputs that switch line-voltage loads via the 1771 backplane. The module is installed in a compatible 1771 I/O chassis and is addressed by the PLC-5 program; energizing an output bit closes the corresponding contact to feed power to a connected device. This eight-channel module supports control of relays, contactors, lighting, and other 120V AC loads directly from the PLC-5 processor, enabling compact expansion of I/O in legacy installations. As part of the 1771 family, the 1771-0A integrates with other digital I/O modules on the same backplane to build scalable control networks for machines and automation panels. When wiring line-voltage loads, follow all applicable electrical codes and safety guidelines and reference the installation documentation for proper power distribution and protection.