Allen Bradley 1771-ASB  I/O Adapter Module

Feature & Principle

It is a remote I/O adapter module for Allen Bradley PLC-5 control system. It acts as the communication gateway on the RIO link, exchanging I/O data between the PLC-5 scanner port and local I/O modules in the 1771 chassis. It uses twisted pair cable for long-distance distributed I/O connection, supports daisy-chain connection of multiple I/O racks, reduces on-site wiring workload, and has built-in LED fault indicators for quick troubleshooting.

Specifications

Model: 1771-ASB Brand: Allen Bradley Compatible controller: PLC-5 Communication type: Remote I/O (RIO) Baud rate: 57.6Kbps / 115Kbps / 230Kbps Backplane current: 1A @ 5VDC Max power consumption: 5.2W Cable: Belden 9463 twisted pair Mounting: Install on 1771 I/O chassis Protection class: IP20 Certification: CE, UL, CSA

Components & Diagnostics

Communication processing board, RIO signal transceiver circuit, DIP address switch, status LED indicators, backplane connector, wiring terminal assembly. Common faults: RIO link disconnection, adapter fault alarm, rack communication loss, module not recognized by scanner.

Product Brief

Allen Bradley 1771-ASB remote I/O adapter module, industrial PLC spare widely used for old PLC-5 distributed control system overhaul and replacement.