The Allen-Bradley 1771-ASB Remote I/O Adapter is a PLC-5 remote I/O slave module that resides in a Universal I/O Chassis and serves as the interface between a PLC-5 controller and a remote I/O rack. In the D-Series configuration, it supports addressing I/O in 2-slot, 1-slot, or 1/2-slot groups, enabling flexible distribution of I/O across the remote rack. As a remote I/O adapter, it communicates with the PLC-5 controller over the Remote I/O network to transfer input and output data to and from connected I/O modules.
