OVERVIEW

Official designation: Allen-Bradley 1746-OB32 (SLC 500, Digital DC Output Module)

The 1746-OB32 is a high-density, 32-point sinking digital DC output module for the SLC 500 system. It controls 24V DC loads and features 32 individual indicators for output status, organized into two electrically isolated groups.

KEY SPECS SUMMARY

Power: 5V DC, 150 mA (backplane)

Interfaces / Ports: Two 40-pin connectors

Indicators: 32 individual output status LEDs

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: SLC 500 chassis/backplane

Limit: 0.5 A per point; 8 A per group (16 points)

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum current rating for each individual output point on the 1746-OB32?

A: Each individual output point has a maximum continuous current rating of 0.5 A.

Wiring & Installation:

Q: How are the 32 output points on the 1746-OB32 divided and powered?

A: The outputs are divided into two isolated groups of 16 points, each requiring a separate 24V DC field power source.

Troubleshooting & Compatibility:

Q: What does it indicate if an output status LED on the 1746-OB32 is illuminated?

A: An illuminated LED indicates that the corresponding output point is currently energized by the module.

Replacement & Upgrades:

Q: Which modern Allen-Bradley platform is generally considered the replacement for the SLC 500?

A: The Allen-Bradley CompactLogix platform is the commonly recommended successor for the SLC 500 family.