Allen-Bradley 1771-ID16 Isolated Input Module

The Allen-Bradley 1771-ID16 is a 16-channel isolated input module for the PLC-5 I/O system, designed to monitor digital input signals derived from 120-volt sources and supporting AC or DC input types. As an isolated input module, it provides galvanic isolation between each input and the backplane, helping protect the PLC-5 processor from voltage transients and reducing interference between channels in demanding industrial environments. The module is intended for installation in a 1771 I/O chassis and delivers 16 discrete input points that interface with field devices such as pushbuttons, limit switches, and proximity sensors, feeding straightforward ON/OFF ladder logic conditions to the PLC-5. Being part of the 1771 PLC-5 family, the 1771-ID16 follows Rockwell's I/O conventions for addressing and wiring and is configured through the PLC-5 programming environment to align with the corresponding input word in the processor's data table.