Allen-Bradley 1781-IA5Q DC Input Module

Description:

The WRC 1781-IA5Q AC/DC Input Module is used in industrial automation systems for monitoring and interfacing 90–140VAC/DC input signals within PLC and discrete I/O control platforms. Commonly installed in manufacturing equipment, conveyor systems, packaging machinery, and industrial process control panels requiring reliable field input signal detection. Maintenance teams, OEMs, and system integrators use this module for PLC input expansion, replacement of failed I/O modules, and retrofit or automation upgrade projects.

Applications:

The WRC 1781-IA5Q module is widely used in industrial environments requiring dependable monitoring of AC or DC field input devices such as switches, relays, sensors, and control contacts. It is commonly integrated into machine automation systems, material handling equipment, process control systems, and manufacturing lines where discrete input signals must be safely transmitted and processed by PLCs or industrial controllers.

Technical Specifications:

• Brand: WRC / Western Reserve Controls
• Part Number: 1781-IA5Q
• Product Type: AC/DC Input Module
• Input Voltage Range: 90–140VAC/DC
• Module Type: Discrete Input Module
• Channel Configuration: Quad Input
• Signal Type: AC/DC Discrete Inputs
• Logic Compatibility: Industrial PLC and I/O Systems
• Status Indicators: LED Channel Status Indicators
• Isolation Type: Optical Isolation
• Mounting Compatibility: Standard I/O Mounting Boards
• Application Type: Industrial Automation and Machine Control
• Industry Applications: Manufacturing, Packaging, Material Handling, Process Automation
• Certification Reference: LR 84997 / E150818
• Intended Use: Signal Monitoring and PLC Input Expansion

Common Replacements:

• WRC 1781-IA5
• Opto 22 OAC5Q
• WRC WRC4-IA5Q