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OVERVIEW
Official designation: Allen-Bradley 1747-L20N (SLC 500, Fixed Controller)
The 1747-L20N is an SLC 500 fixed controller with 20 total I/O points, featuring 12 DC source inputs and 8 DC transistor sink outputs. It operates on 24 V DC power.
KEY SPECS SUMMARY
Power: 24 V DC
Interfaces / Ports: Built-in fixed I/O
Indicators: Run, Fault, Forced I/O
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: SLC 500 Series
Limit: 20 total I/O channels
Lifecycle: Discontinued
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What are the input and output electrical specifications of the 1747-L20N controller?
A: It provides 12 DC source inputs and 8 DC transistor sink outputs.
Wiring & Installation:
Q: What is the required line power voltage for the Allen-Bradley 1747-L20N fixed controller?
A: The controller requires 24 V DC power for operation.
Troubleshooting & Compatibility:
Q: What diagnostic indicators are used to show the current operating status of the 1747-L20N?
A: Status is displayed using Run, Fault, and Forced I/O indicator LEDs.
Replacement & Upgrades:
Q: Is the Allen-Bradley 1747-L20N controller currently available as an active product?
A: No, the 1747-L20N fixed controller model is currently marked as discontinued.
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