Allen-Bradley 1746-OW4 SLC 500 Relay Output Module

Description

The Allen-Bradley 1746-OW4 is a 4-point relay output module designed for the SLC 500 programmable controller system. This module provides four isolated, normally open relay contact outputs, allowing for the control of various field devices using either AC or DC power sources. It is suitable for applications requiring high-voltage switching or electrical isolation between the PLC backplane and the controlled load.

Features

• 4-point relay output configuration
• Isolated output channels for flexible wiring
• Compatible with a wide range of voltages: 5-265 VAC or 5-125 VDC
• Designed for seamless integration into the SLC 500 chassis
• Reliable N.O. relay contact switching for industrial loads

Applications

The 1746-OW4 is commonly used in industrial automation environments where the PLC must interface with external devices such as motor starters, contactors, solenoid valves, or indicator lamps that operate on different voltage levels than the controller backplane.

Technical Specifications

Installation Guidelines

• Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
• Slide the module into the designated slot in the SLC 500 rack and secure it using the top and bottom retaining screws.
• Use appropriate wire gauges for the terminal block connections to ensure secure contact.
• Maintain proper cable routing to separate high-voltage signal wiring from low-voltage communication cables to minimize EMI.
• Handle the module using ESD-safe practices to prevent damage to internal electronic components.

FAQ

Is the 1746-OW4 still in production?

No, the 1746-OW4 has been discontinued by the manufacturer. We provide high-quality surplus or refurbished units to support legacy systems.

Can this module be used for both AC and DC loads?

Yes, the relay contacts are rated for both AC (up to 265V) and DC (up to 125V) operations, providing significant flexibility for diverse field requirements.