Allen Bradley 1746-IM4 — Comprehensive Technical Overview

1. Product Introduction

The Allen Bradley 1746-IM4 is a compact digital AC input module designed for modular PLC systems. It is used to receive medium-voltage AC signals from field devices such as push buttons, selector switches, and relay contacts, and convert these signals into logic-level data for controller processing.

This module features 4 discrete input channels, making it suitable for applications where only a small number of AC input points are required. It is optimized for operation with 200–240V AC signals, which are commonly used in industrial environments outside North America or in specific machinery systems.

The module is installed in a chassis and communicates with the processor via the backplane. Its role is to provide stable and reliable signal acquisition, ensuring accurate system monitoring and control.

2. Brand and Series

• Brand: Allen-Bradley
• Series: SLC 500 Series
• Product Type: Digital AC Input Module (Medium Voltage)

The SLC 500 series is a modular PLC platform widely used in industrial automation. The 1746-IM4 is designed as a low-channel-count solution within this system, offering flexibility for smaller applications.

3. Product Parameters

Below is a detailed and structured parameter table for the 1746-IM4:

4. Product Applications

The 1746-IM4 is widely used in industrial systems that require monitoring of medium-voltage AC input signals:

• Control panels using 220–240V AC push buttons
• Limit switch and relay signal monitoring
• Machine status and condition feedback
• Conveyor and material handling systems
• Packaging and assembly line control
• Auxiliary input expansion in larger PLC systems
• Industrial equipment using standard AC control voltage

It is particularly suitable for applications where only a few AC inputs are needed but reliability remains critical.

5. Product Advantages

Compact form factor
Provides essential functionality with only 4 channels, saving installation space.

Medium-voltage support
Designed for 200–240V AC systems, making it suitable for a wide range of industrial standards.

Reliable signal detection
Ensures stable conversion of AC signals into control system data.

Electrical isolation
Protects the controller from voltage spikes and electrical noise.

Simple system integration
Easily installs into modular PLC systems without complex configuration.

Cost-effective deployment
Ideal for small systems or auxiliary input expansion without unnecessary capacity.

6. Recommended Models (Same Series or Related)

Below are 5 related models within the same SLC 500 series or similar I/O category:

These modules are commonly combined to create complete digital input/output systems.

7. Recommended Popular Models (Same Brand)

Below are 5 widely used models from the same brand in industrial automation systems: