Allen-Bradley 1771-ARC Remote IO Adapter Module

The Allen-Bradley 1771-ARC Remote I/O Adapter Module is the dedicated interface that links remote I/O racks to a Rockwell Automation controller in 1771-series installations. Designed to reside in a 1771 Universal I/O Chassis, the 1771-ARC serves as the remote I/O adapter for the system, enabling the processor to monitor and control I/O modules located away from the main control cabinet. As a genuine 1771 Remote I/O module, it integrates with other 1771 I/O modules on the same backplane and uses the 1771 architecture’s backplane connectors to exchange data and control signals with the controller. The part is listed under the 1771-ARC model number and is used in legacy Allen-Bradley installations that rely on 1771 I/O networking to distribute sensing and actuation across the plant floor. Common applications include expanding discrete input and output points in manufacturing lines, process supervision, and equipment monitoring where centralized logic manages remote field devices.