The Allen-Bradley 1746-IM8 is an 8-point AC input module designed for use within the SLC 500 programmable logic controller (PLC) system. This module provides a reliable interface between high-voltage field devices and the SLC 500 processor, converting 200/240V AC input signals into logic-level signals compatible with the controller. As a standard I/O component, it is engineered to facilitate industrial automation control by monitoring the status of switches, sensors, and other AC-powered field devices.
Features
8-point input density for efficient I/O configuration.
Designed for 200/240V AC voltage levels.
Compatible with the Allen-Bradley SLC 500 modular chassis system.
Provides optical isolation between field wiring and internal backplane circuitry.
Status indicators for each input channel for simplified diagnostics.
Applications
This module is widely utilized in industrial environments requiring the monitoring of 240V AC field devices. Typical applications include manufacturing assembly lines, material handling systems, and process control equipment where AC-based sensors or limit switches are integrated into the PLC control architecture.
Technical Specifications
Product Model
1746-IM8
Manufacturer
Allen-Bradley
System
SLC 500
Input Voltage
200/240V AC
Number of Inputs
8 Points
Weight
0.2 kg
Installation Guidelines
Ensure the SLC 500 chassis power is disconnected before installing or removing the module to prevent electrical shock or damage to the backplane.
Verify that the module is fully seated in the chassis slot and secured with the top and bottom retaining screws.
Use shielded cabling for field inputs to minimize electromagnetic interference (EMI) in high-noise industrial environments.
Ensure that the input voltage does not exceed the rated 240V AC specification to avoid permanent damage to the module circuitry.
Follow standard ESD (Electrostatic Discharge) handling procedures when touching the module electronics.
FAQ
Is the 1746-IM8 still in production?
No, the 1746-IM8 has been discontinued by the manufacturer. We provide high-quality surplus or refurbished units to support legacy SLC 500 systems.
What is the primary function of this module?
The 1746-IM8 serves as an interface module that detects 240V AC signals from external field devices and transmits that status to the SLC 500 processor for logic execution.
