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OVERVIEW
Official designation: Allen-Bradley 1746-OW4 (SLC 500, Digital Contact Output Module)
The 1746-OW4 is a compact relay output module for the SLC 500 system. It provides four individually isolated, normally open (N.O.) contact outputs, enabling switching of field devices using mixed AC or DC voltages.
KEY SPECS SUMMARY
Power: 5V DC @ 155 mA
Interfaces / Ports: 20-pin terminal block
Indicators: 4 Output Status LEDs
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: SLC 500 Modular
Limit: 5–265 VAC or 5–125 VDC
Lifecycle: Active
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What are the maximum AC and DC voltage ratings supported by the 1746-OW4 relay outputs?
A: It supports switching up to 265 VAC and up to 125 VDC.
Wiring & Installation:
Q: How many relay outputs does the Allen-Bradley 1746-OW4 module provide for switching field power?
A: The module is equipped with four normally open (N.O.) relay output channels.
Troubleshooting & Compatibility:
Q: Can the 1746-OW4 operate safely in a system with mixed AC and DC field voltages?
A: Yes, the isolated relay contacts allow switching of both AC and DC loads.
Replacement & Upgrades:
Q: What are the recommended surge suppression devices for inductive loads connected to the 1746-OW4 outputs?
A: Refer to the latest manufacturer manual.
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