Allen-Bradley 1771-AR Remote IO Adapter Module

The Allen-Bradley 1771-AR Remote I/O Adapter Module is a PLC-5 era interface that serves as the remote I/O adapter in a 1771 Remote I/O network. Designed to install in a 1771 Remote I/O chassis, it provides the communication bridge between the PLC-5 controller and the remote I/O racks, enabling distributed input and output across the manufacturing floor. Used with Allen-Bradley 1771 I/O modules and associated remote racks, the 1771-AR participates in the remote I/O topology where the processor communicates with multiple remote devices over the 1771 network. Typical applications include expanding control and sensing capabilities in automation lines where centralized CPU access to distant sensors and actuators is required, making the 1771-AR a foundational component in legacy PLC-5 installations.