Allen-Bradley 1746-OW4 SLC 500 Digital Contact Output Module

Technical Specifications Breakdown

Key parameters for the 1746-OW4 are listed below for quick reference:

Industry Applications

Switching AC and DC Loads

Its wide operating voltage range (5-265V AC or 5-125V DC) allows integration into both AC and DC control circuits without additional converters.

Cost-Effective Output Expansion

For system integrators looking to add discrete outputs to an SLC 500 rack, the 1746-OW4 provides a straightforward solution. The four N.O. relay contacts offer reliable switching for moderate current loads, reducing the need for external interposing relays.

Installation & Setup Guidance

Before installation, disconnect all power to the SLC 500 chassis. Mount the 1746-OW4 into any available slot in the rack. Wire loads to the normally open relay contacts according to your application voltage (AC or DC). Always refer to the user manual for detailed wiring diagrams and torque specifications. Ensure that the total current through the module does not exceed the maximum continuous current per module of 8A.

Maintenance & Reliability

The relay contacts in this module are vulnerable to chemical exposure, which may degrade sealing materials. Inspect the module periodically for signs of degradation. If any degradation is found, replace the module promptly to maintain system reliability. The module has a maximum thermal dissipation of 1.9 W, so ensure adequate airflow around the chassis.

Do you need a reliable relay output module for your SLC 500 system?

The Allen-Bradley 1746-OW4 is a SLC 500 Digital Contact Output Module designed for relay contact output applications. This module provides four normally open (N.O.) relay contact outputs, making it suitable for switching AC or DC loads in industrial environments. With an operating voltage range of 5-265 Volt AC or 5-125 Volts DC, it offers flexibility for various control circuits.

Compatibility & Integration

The 1746-OW4 is part of the Allen-Bradley SLC 500 series and is compatible with all SLC 500 processors and chassis. It communicates via the backplane, drawing 45 milliamps. No additional communication protocols are required for basic operation.

Selection Guide & Purchasing Advice

When selecting a relay output module, consider the number of outputs, voltage range, and current requirements. The 1746-OW4 is a proven choice for general-purpose switching. At AutoDCSTech, we stock this module and can help you verify lifecycle status and availability before ordering. Contact our team for assistance.

Troubleshooting & Common Issues

If outputs fail to energize, check the backplane connection and ensure the module is properly seated. Verify that the load voltage is within the 5-265V AC or 5-125V DC range. If relay contacts weld or fail to open, inspect for overcurrent conditions or chemical exposure. Always power down before troubleshooting.