Allen-Bradley 1746-IO8 SLC 500 Digital I/O Combination Module

Product Overview

The Allen-Bradley 1746-IO8 is a digital I/O combination module from the SLC 500 series, designed for flexible operation in both non-hazardous and Class 1, Division 2, Groups A, B, C, and D hazardous industrial environments. This module combines four 120V AC inputs with four relay contact outputs, making it a space-saving solution for applications requiring mixed signal types. It fits into any slot (except slot 0) of a 1746 I/O chassis, simplifying installation and reducing wiring complexity.

Technical Specifications Breakdown

Key parameters for the 1746-IO8 are listed below for quick reference:

Industry Applications

For example, in a packaging machine, the 1746-IO8 can monitor limit switches (inputs) and control solenoid valves (outputs) simultaneously. Its relay outputs handle up to 1.5A at 120V AC, suitable for driving small motors, lights, or contactors. The 35-45 ms signal delay ensures reliable operation in medium-speed applications.

Installation & Setup Guidance

Install the 1746-IO8 into any available slot (except slot 0) of a 1746 I/O chassis. Ensure the chassis is powered down before insertion. The module draws 0.03A at 5V DC and 0.025A at 24V DC from the backplane. Connect 120V AC input signals to the input terminals and relay output loads to the output terminals. The relay contacts are Normally Open (N.O.) and rated for 1.5A continuous at 120V AC or 1.2A at 24V DC. Use appropriate fusing for output circuits.

Maintenance & Reliability

The 1746-IO8 is designed for long-term reliability in industrial environments. It operates within 0 to 60 °C (32 to 140 °F) and 5-95% humidity. Periodically inspect the module for dust accumulation and ensure proper ventilation. The module has a shock rating of 30G and vibration rating of 2.5G at 57-200Hz, making it robust for harsh conditions. No routine calibration is required.

Compatibility & Integration

It is CE, CSA, and C-UL certified, and provides NEMA standard ICS 2-230 rated noise immunity. Use standard 1746 wiring accessories for field connections.

Selection Guide & Purchasing Advice

When selecting the 1746-IO8, verify that your application requires 4 inputs and 4 relay outputs at 120V AC. This module is a cost-effective choice for mixed I/O needs. AutoDCSTech stocks this module and can advise on lifecycle status and availability. Please verify current lifecycle status and availability with AutoDCSTech before ordering.