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OVERVIEW
Official designation: Allen-Bradley 1747-L541 (SLC 500, SLC 5/04 Processor Module)
The 1747-L541 is a mid-range SLC 5/04 programmable controller providing fast processing, 16 KB user memory, and dual communication ports (RS-232 and DH+).
KEY SPECS SUMMARY
Power: 5V DC, 1.2 A (backplane)
Interfaces / Ports: 9-pin D-shell (RS-232), DH+ port
Indicators: 10 status LEDs (RUN, FAULT, BATT, etc.)
Operating Temp: 0 to 60 degrees C
Platform / Compatibility: SLC 500 modular system
Limit: 4096 discrete I/O points
Lifecycle: Discontinued
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the user program memory capacity of the 1747-L541 SLC 5/04 controller?
A: The controller features a program storage capacity of 16 KB of user memory.
Wiring & Installation:
Q: What communication protocols are supported by the two built-in communication ports?
A: The module supports DF1 via the RS-232 port and Data Highway Plus (DH+) via the DH+ port.
Troubleshooting & Compatibility:
Q: What does a red FAULT LED indicate on the SLC 5/04 processor module?
A: A red FAULT LED signifies a major or minor error, requiring the user to check the fault table.
Replacement & Upgrades:
Q: What modern Allen-Bradley series is suggested for replacing discontinued SLC 500 analog modules?
A: The 1756-DNB ControlLogix DeviceNet Scanner module is a common replacement.
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