WRC 1781-IA5Q DC Input Module

The WRC 1781-IA5Q AC/DC Input Module is a quad-channel discrete input module designed to monitor 90–140 VAC or DC field signals and feed them into PLCs and industrial I/O systems. Each channel uses optical isolation and features LED status indicators to verify input activity, providing clear diagnostics for wiring and sensor checks. Built for standard I/O mounting boards, it suits industrial automation and machine control across manufacturing lines, conveyors, packaging equipment, and process control panels that require reliable signal monitoring of switches, relays, and sensors. This module supports PLC input expansion or replacement of failed I/O modules in retrofit projects, with LR 84997 / E150818 certification referenced for industrial use. Common replacements include WRC 1781-IA5, Opto 22 OAC5Q, and WRC WRC4-IA5Q, reflecting its role in compatible industrial control architectures that rely on discrete AC/DC inputs.