Product Introduction

The Allen-Bradley 1746-OW4 is a relay-based digital output module designed for the SLC 500 PLC system. Unlike transistor output modules, this unit uses electromechanical relays, allowing it to switch both AC and DC loads with a wide voltage range.

The module provides 4 independent relay output channels, making it suitable for applications requiring flexible voltage switching. Each relay contact can handle loads from 5–265V AC or 5–125V DC, enabling control of a broad range of field devices such as motors, lamps, solenoids, and contactors.

Thanks to its relay output design, the 1746-OW4 offers electrical isolation between control logic and field devices, making it especially useful in mixed-voltage environments. It is widely used in industrial systems where versatility and robustness are more important than high-speed switching.

Product Specifications

Applications

● Mixed Voltage Control Systems
Ideal for applications where both AC and DC loads must be controlled within the same system.

● Industrial Machinery Control
Used to switch motors, contactors, and other high-voltage devices.

● Lighting and Signaling Systems
Controls lamps, indicators, and alarms across various voltage levels.

● Process Automation
Suitable for systems requiring reliable relay-based switching with isolation.

● Retrofit and Legacy Systems
Commonly used when replacing older relay-based control systems.

Advantages

● Wide Voltage Compatibility
Supports both AC and DC loads, offering excellent flexibility.

● Electrical Isolation
Relay contacts provide natural isolation between control and load circuits.

● Robust Load Handling
Capable of switching higher voltages compared to transistor outputs.

● Versatile Applications
Suitable for a wide range of industrial control scenarios.

● Simple Integration
Easily installs into standard SLC 500 chassis.

● Reliable Mechanical Switching
Well-suited for applications where switching speed is not critical.

Allen Bradley 1746-OW4 SLC 500 Relay Output Module最先出现在Excellent PLC。