Allen Bradley 1746-OW8 Relay Output Module

Product Introduction

The Allen-Bradley 1746-OW8 is a relay output module developed for the SLC 500 programmable controller platform. It is designed to provide flexible and electrically isolated switching for both AC and DC loads, making it suitable for a wide range of industrial control applications.

Equipped with 8 independent relay output points, the 1746-OW8 supports 5–125 VDC and 5–265 VAC at 50/60 Hz, allowing it to interface directly with diverse field devices without the need for additional interposing relays. The relay-based output design makes this module particularly well suited for mixed-voltage environments and applications requiring galvanic isolation between the controller and field loads.

The 1746-OW8 integrates seamlessly into SLC 500 I/O chassis and is commonly used in systems where reliability, versatility, and compatibility with various load types are critical.

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Product Specifications

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Applications

• Mixed-voltage control systems, switching both AC and DC field devices

• Industrial machinery, controlling contactors, solenoids, and pilot devices

• Process automation panels, providing isolated control for external loads

• Material handling equipment, driving relays and actuators

• Utility and infrastructure systems, where voltage flexibility is required

• Legacy SLC 500 installations, expanding relay-based output capability

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Advantages

• Wide voltage compatibility, supporting both AC and DC loads

• Relay-based isolation, protecting PLC electronics from field-side disturbances

• Flexible application use, ideal for mixed-signal environments

• Individual output control, enabling precise switching per channel

• Seamless SLC 500 integration, simplifying system design and upgrades

• Robust industrial design, suitable for demanding control environments

FAQ

1. What type of output technology does the 1746-OW8 use?
   It uses electromechanical relays to switch field loads.

2. Can the module control both AC and DC loads?
   Yes, it is designed to switch both AC and DC voltages within its rated ranges.

3. Are the relay outputs electrically isolated?
   Yes, each output provides galvanic isolation between the field device and the PLC backplane.

4. Is each output point controlled independently?
   Yes, all eight relay outputs can be controlled individually by the SLC 500 processor.

5. What types of devices are commonly driven by this module?
   It is commonly used to control contactors, solenoids, indicator lamps, and auxiliary relays.

6. Is the 1746-OW8 suitable for low-frequency switching applications?
   Yes, it is well suited for general-purpose and low-frequency switching tasks.

7. Can multiple outputs be energized at the same time?
   Yes, multiple relay outputs can operate simultaneously within rated electrical limits.

8. Does the module require external relays for load isolation?
   No, the built-in relay contacts provide isolation without additional components.

9. Is this module compatible with existing SLC 500 systems?
   Yes, it is fully compatible with standard SLC 500 I/O chassis and processors.

10. Is the 1746-OW8 appropriate for retrofit or system expansion projects?
    Yes, it is commonly used for system upgrades and expansions requiring relay outputs.

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