Allen-Bradley 1771-ASB D Remote IO Adapter Module

Allen-Bradley 1771-ASB D Remote I/O Adapter Module is an AB remote I/O interface card that lets a PLC-5 controller access a distant rack of I/O modules as part of a Remote I/O network. Placed in a Universal I/O Chassis, the ASB acts as a slave device on the remote network, translating controller commands to the remote rack and returning input data for the PLC to process. The D suffix identifies the Series D variant within the 1771-ASB family, used to extend I/O in PLC-5 installations that rely on the 1771 Remote I/O architecture. Typical applications include distributed automation tasks across manufacturing cells, where sensors, limit switches, and actuators are located remotely from the central controller; the adapter supports the standard physical and logical interfaces that enable scanning of the remote I/O image by the PLC-5. For exact specifications, addressing, and compatibility details, consult the official Allen-Bradley/Rockwell Automation datasheets and product manuals for 1771-ASB or 1771-ASB/D.