OVERVIEW

Official designation: Allen-Bradley 1746-OA8 (SLC 500, Discrete AC Output Module)

The 1746-OA8 is an 8-point discrete AC output module for the SLC 500 family, utilizing relay outputs to switch 85 to 264V AC loads. The outputs are arranged in two isolated groups for reliable industrial control applications.

KEY SPECS SUMMARY

Power: 5V DC backplane, 185 mA

Interfaces / Ports: 36-pin terminal block

Indicators: 8 status LEDs (output status)

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: SLC 500 I/O chassis

Limit: 8 outputs in 2 isolated groups

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the primary switching component used in the 1746-OA8 to control AC loads?

A: The module uses relay outputs, which provide high-voltage isolation and handle various loads.

Wiring & Installation:

Q: How are the eight outputs electrically separated on the 1746-OA8 module?

A: The outputs are organized into two separate groups, allowing for isolation of different power sources.

Troubleshooting & Compatibility:

Q: What does an illuminated status LED on the 1746-OA8 module indicate to an operator?

A: The LED indicates that the corresponding output is commanded ON and its relay contact is likely closed.

Replacement & Upgrades:

Q: What is a critical compatibility factor when replacing the 1746-OA8 module due to its high voltage AC rating?

A: Any replacement module must support the required 85 to 264V AC switching capability.