Allen Bradley 1746-OX8 Isolated Relay Output Module

Product Introduction

The Allen-Bradley 1746-OX8 is an isolated relay output module designed for the SLC 500 programmable controller family. It is intended for applications that require high electrical isolation, robust switching capability, and reliable control of higher-power field devices.

This module provides 8 independent relay output points, each capable of switching up to 5 A, supporting 265 VAC or 125 VDC at 50/60 Hz. The isolated relay design ensures strong separation between the PLC backplane and field wiring, making the 1746-OX8 especially suitable for noisy electrical environments or systems with mixed power domains.

The 1746-OX8 is widely used in industrial automation systems where safety, flexibility, and durability are critical. It integrates seamlessly into SLC 500 I/O chassis and is commonly selected for controlling contactors, motor starters, valves, and other power-demanding devices.

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Product Specifications

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Applications

• Power control systems, switching contactors, motor starters, and control relays

• Industrial machinery, controlling valves, solenoids, and auxiliary devices

• Mixed-voltage environments, where strong electrical isolation is required

• Process automation panels, ensuring safe separation between PLC logic and field power

• Material handling systems, driving higher-current AC or DC loads

• Legacy SLC 500 systems, adding isolated relay outputs for system expansion

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Advantages

• High-current switching capability, suitable for demanding industrial loads

• Isolated relay outputs, protecting PLC electronics from electrical noise and transients

• Wide voltage compatibility, supporting both AC and DC power systems

• Independent output control, allowing flexible and precise switching

• Reliable electromechanical design, proven in industrial environments

• Seamless SLC 500 integration, simplifying configuration, replacement, and upgrades

FAQ

1. What distinguishes the 1746-OX8 from standard relay output modules?
   It provides fully isolated relay outputs with higher current-handling capability for demanding applications.

2. Can the outputs control both AC and DC devices?
   Yes, the module is designed to switch both AC and DC loads within its rated electrical limits.

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

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

5. What types of loads are typically driven by this module?
   It is commonly used to control contactors, motor starters, valves, solenoids, and power relays.

6. Is the 1746-OX8 suitable for electrically noisy environments?
   Yes, the isolated relay design makes it well suited for high-noise industrial applications.

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

8. Does the module require external isolation components?
   No, the built-in relay isolation eliminates the need for additional isolators.

9. Is this module compatible with standard SLC 500 chassis and processors?
   Yes, it is fully compatible with standard SLC 500 hardware.

10. Is the 1746-OX8 suitable for retrofit and system expansion projects?
    Yes, it is widely used for upgrading or expanding existing SLC 500 control systems.

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