Allen-Bradley 1746-IO12 SLC 500 I/O Module Guide

June 23, 2026 • 2 min read • wayne • Industry News

Product Summary

The Allen-Bradley 1746-IO12 is a SLC 500 combination module. It integrates six 120VAC input channels and six Form A relay outputs. This design saves valuable chassis slots and simplifies wiring. Engineers use it for reliable control in mixed-voltage environments.

Theme Option A: Product Procurement & Buyer Guide

Procurement teams require a clear understanding of technical alignment. The 1746-IO12 operates with an input voltage range of 85-132 Volts AC. This makes it ideal for standard 120VAC industrial sensors and switches. The output side handles both AC and DC loads. It supports 24-125 VDC and 120-240 VAC at 47-63 Hz. This dual capability reduces the need for separate modules.

Each output point delivers a continuous current of 1.5 amps at 120 VAC and 1.2 amps at 24 VDC. The total continuous current per module reaches 8.0 A. This module occupies exactly one slot in a SLC 500 chassis. This single-slot design directly cuts panel space and lowers total cost of ownership. It is a cost-effective component for discrete control tasks.

The module draws a backplane current of 70-90 mA. This low power draw ensures compatibility with existing SLC 500 power supplies. The signal delay is 35 milliseconds for the ON state and 45 milliseconds for the OFF state. This predictable timing is crucial for precise machine control sequences. It offers electro-optical isolation tested at 1500V between I/O terminals and logic.

This isolation protects the processor from field wiring faults. The module holds a CSA certification for Class 1, Division 2 hazardous locations. This certification is vital for environments with flammable gases or vapors. The functional temperature range is 0-60 degrees Celsius. It also withstands 30G operational shock and 2.5G vibration at 57-200Hz. These specs ensure reliable operation in harsh industrial settings.

Application engineers can mix this module with other SLC 500 modules. It fits in local or expansion chassis, excluding the processor slot. This flexibility allows for scalable system design. The input functionality mirrors the 1746-IA16 module. The relay output compares to the 1746-IO8 or 1746-IO4. This provides a known architecture for system integrators.