Allen-Bradley 1746-OW8 SLC 500 Digital Contact Output Module

Product Overview

The Allen-Bradley 1746-OW8 is a digital contact output module from the SLC 500 series, designed for use with Rockwell Automation programmable logic controllers. This module features eight normally open (N.O.) relay channels, providing reliable switching for industrial applications. It operates on a versatile voltage range of 5-265 Volt AC or 5-125 Volts DC, making it suitable for diverse control systems. The module is organized into two output groups, each with four channels per common, allowing flexible wiring and isolation.

Technical Specifications Breakdown

Key parameters for the 1746-OW8 are listed below for quick reference:

Industry Applications

Its dual-group configuration allows mixing AC and DC loads within the same module, reducing the need for external interposing relays. For example, one group can drive 120V AC motor starters while the other handles 24V DC sensors, saving panel space and simplifying wiring. The module's 1.5 amps per output at 120V AC supports moderate loads directly.

Installation & Setup Guidance

When installing this module, ensure the SLC 500 chassis slot is compatible and that backplane power is within the 0.85-0.9 A range. The module is supplied as open-type equipment and must be housed in an enclosure accessible only with a tool. Do not disconnect equipment while power is applied, especially in hazardous areas, to avoid electric arcs. For remote I/O topologies, slot 0 must contain an SLC 500 communication adapter; other slots can host this module.

Maintenance & Reliability

Periodically inspect the module for signs of overheating or relay contact wear. The operating temperature range is -25-60 deg. Celsius (-13-140 deg. Fahrenheit), with nonoperating tolerance from -40-85 deg. Celsius (-40-185 deg. Fahrenheit). Maintain relative humidity between 5-95% without condensation. The module withstands 2g vibration at 10-500 Hz and 30g shock. Surge suppression devices can extend relay life.

Compatibility & Integration

This module is compatible with SLC 5/01, 5/02, 5/03, 5/04, and 5/05 controllers, as well as remote I/O configurations. It occupies a single slot in the chassis. The continuous current per module is 16.0 Ampere AC with 8.0 A per group. The module is certified for Class 1, Division 2 operation.

Selection Guide & Purchasing Advice

For reliable automation upgrades or replacements, the 1746-OW8 offers cost-effective relay output expansion. Please verify current lifecycle status and availability with AutoDCSTech before ordering. Our team can help confirm compatibility with your existing SLC 500 system.