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OVERVIEW
Official designation: Allen-Bradley 1747-L20C (SLC 500, Fixed Controller)
The 1747-L20C is a fixed-hardware SLC 500 controller with 1K instruction capacity for small control applications. It integrates 12 DC sink inputs and 8 relay outputs, accepting 120/240 VAC power.
KEY SPECS SUMMARY
Power: 120/240 VAC
Interfaces / Ports: Built-in I/O terminals
Indicators: Run, Fault, Force, 20 I/O LEDs
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: SLC 500 Fixed
Limit: 1K instruction memory
Lifecycle: Discontinued
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What are the input and output count specifications and output type for the 1747-L20C controller?
A: It has 12 DC sink inputs and 8 relay outputs.
Wiring & Installation:
Q: What is the nominal AC voltage range required to power the 1747-L20C controller?
A: The controller accepts either 120 VAC or 240 VAC power input.
Troubleshooting & Compatibility:
Q: What does an illuminated Fault LED indicate on the fixed 1747-L20C controller?
A: A Fault LED indicates a non-recoverable internal hardware or program error.
Replacement & Upgrades:
Q: What is the memory capacity of the 1747-L20C controller for user program storage?
A: The controller provides a limited program storage capacity of 1K instructions.
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| After-sales Service Contact or Customer Support Number | See this page for details |
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