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OVERVIEW
Official designation: Allen-Bradley 1746-OB16 (SLC 500, Discrete DC Output Module)
The 1746-OB16 is a high-speed SLC 500 discrete output module featuring 16 sinking (current sourcing) outputs in a single common group, suitable for 24V DC field devices.
KEY SPECS SUMMARY
Power: 5V DC, 150 mA (backplane)
Interfaces / Ports: 36-pin terminal block
Indicators: 16 output status LEDs (green)
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: SLC 500 modular hardware
Limit: 0.5 A max per channel
Lifecycle: Discontinued
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the nominal output voltage and current rating per channel for this module?
A: The nominal output is 24V DC with a maximum current rating of 0.5 A per channel.
Wiring & Installation:
Q: Does the 1746-OB16 require an external power source for the output signals?
A: Yes, an external 10 to 50V DC power supply is required for the output circuitry.
Troubleshooting & Compatibility:
Q: How can output faults be diagnosed on the 1746-OB16 module?
A: Module faults are typically diagnosed by observing the status of the 16 green output status LEDs.
Replacement & Upgrades:
Q: Which newer Allen-Bradley platform is generally recommended as an upgrade path for the SLC 500 system?
A: The ControlLogix or CompactLogix platforms are the general recommended upgrade path for SLC 500.
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