Allen Bradley 1746-OA8 SLC 500 AC Digital Input Module

Product Introduction

The Allen-Bradley 1746-OA8 is an AC Digital Input Module designed for the SLC 500 programmable controller platform. It provides reliable control of AC-powered field devices in industrial automation systems where robust switching performance and electrical isolation are required.

This module offers eight independent AC output channels, operating in a current sourcing configuration, making it suitable for driving loads such as contactors, solenoid valves, indicator lamps, and alarms. Each channel is designed to switch AC loads within a wide voltage range, allowing flexible integration into different industrial power environments.

Engineered for dependable operation in control cabinets, the 1746-OA8 emphasizes electrical robustness, predictable switching behavior, and seamless compatibility with SLC 500 processors. It is commonly used in legacy systems, retrofit projects, and standard machine control applications where AC outputs remain the preferred choice for field actuation.

Product Specifications

Applications

• Industrial machine control, switching AC contactors, relays, and pilot devices

• Process automation systems, controlling AC-powered actuators and indicators

• Material handling equipment, driving warning lights, alarms, and auxiliary devices

• Manufacturing production lines, providing reliable AC output control for field devices

• Utility and infrastructure systems, managing AC loads in monitoring and control panels

• Legacy SLC 500 installations, maintaining AC output capability without system redesign

Advantages

• Wide AC voltage range, allowing use across different industrial power standards

• Eight-channel density, reducing the number of modules required in the I/O chassis

• Solid-state switching, improving reliability and reducing mechanical wear

• Electrical isolation, protecting the controller from field-side disturbances

• Current sourcing design, suitable for standard AC load wiring practices

• Seamless SLC 500 integration, ensuring straightforward configuration and operation

• Stable long-term performance, supporting continuous industrial duty cycles

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