Allen-Bradley 1746-IA8 SLC 500 Digital AC Input Module

Description

The Allen-Bradley 1746-IA8 is a chassis-based digital AC input module designed for the SLC 500 modular control system. Engineered for industrial automation environments, this module interfaces standard 100 to 120VAC field signals with the processor backplane, converting alternating current sensor states into reliable internal data bits. It features 8 discrete input channels housed within a compact open-style modular enclosure suitable for standard rack mounting.

The 1746-IA8 provides reliable optical isolation between the high-voltage field side and the low-voltage backplane logic. It operates efficiently across standard industrial line frequencies, making it ideal for monitoring limit switches, pushbuttons, selector switches, and auxiliary relay contacts in discrete manufacturing and process control loops.

Features

• 8 discrete AC input channels operating at 100/120VAC nominal voltage
• Optical isolation between input points and the backplane logic
• Front-panel status indicators providing visual feedback for individual input points
• Chassis-based modular design for seamless integration into SLC 500 backplanes
• Compatible with optional external current-limiting resistors for specialized inrush mitigation

Applications

• Monitoring mechanical limit switches and proximity sensors in automated assembly lines
• Interfacing operator control stations, pushbuttons, and selector switches
• Tracking status signals from motor starters, contactors, and control relays
• General-purpose digital AC signal acquisition within SLC 500 control racks

Technical Specifications

Compliance and Certifications

• UL Listed Industrial Control Equipment
• CSA Certified
• CE Compliant for applicable directives