Allen-Bradley 1746-IA4 SLC 500 Digital AC Input Module 4-Channel

Product Overview

The Allen-Bradley 1746-IA4 is a SLC 500 Digital AC Input Module designed for reliable signal acquisition in industrial environments. This module provides 4 discrete inputs with a voltage range of 85-132 Volts AC, making it suitable for general-purpose applications where 120V AC sensing is required. With a backplane current draw of only 35 milliamps at 5 Volts DC, it minimizes power consumption in your control cabinet. The 1746-IA4 is built for durability and ease of integration into existing SLC 500 systems.

Technical Specifications Breakdown

Key parameters for the 1746-IA4 are listed below for quick reference:

Industry Applications

For example, it can monitor limit switches or push buttons on conveyor systems, ensuring accurate part detection. The 4-channel configuration allows compact installation in space-constrained panels. Its 85-132V AC range accommodates voltage fluctuations common in industrial settings, reducing false triggering. By using the 1746-IA4, engineers can achieve cost-effective input monitoring without sacrificing performance.

Installation & Setup Guidance

Mount the module in any single slot of a SLC 500 chassis. Use the 1746-HT or 1746-HCA I/O connection cables for field wiring. Ensure the input voltage stays within 85-132V AC to prevent damage. The module automatically draws 35 mA from the 5V DC backplane; no external power supply is needed. Verify that the chassis power supply can support this additional load. For best noise immunity, route AC input wiring away from high-energy cables.

Maintenance & Reliability

Periodically inspect the module for dust accumulation and ensure proper airflow around the enclosure. The operating temperature range is 32–140 degrees Fahrenheit, so avoid placing the module near heat sources. Check the status display LEDs for normal operation. The open-style enclosure requires protection from conductive contaminants. Replace the module if the off-state current exceeds 2 milliamps, indicating possible leakage.

Compatibility & Integration

It uses standard 1746-series I/O connection cables for field wiring. The module occupies one slot and communicates via the backplane, requiring no additional configuration for basic operation. It is compatible with all SLC 500 CPUs.

Selection Guide & Purchasing Advice

When selecting a digital AC input module for your SLC 500 system, consider the number of inputs needed and voltage range. For higher channel counts, explore other SLC 500 modules. AutoDCSTech offers this module with verified authenticity. Please verify current lifecycle status and availability with AutoDCSTech before ordering.