OVERVIEW

Official designation: Allen-Bradley 1747-L514 (SLC 500, Processor Module)

The 1747-L514 is an SLC 500 fixed hardware processor featuring 4 KB of user memory and an integrated DH-485 port. It manages control logic and supports up to 30 I/O slots for small-to-medium applications.

KEY SPECS SUMMARY

Power: 5V DC backplane, 0.090 A

Interfaces / Ports: DH-485, Serial port

Indicators: Run, Fault, Force, Comm LEDs

Operating Temp: 0 to 60 degrees C

Platform / Compatibility: SLC 500 I/O chassis

Limit: 4 KB memory, 30 I/O max

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum current draw of the 1747-L514 processor from the chassis backplane supply?

A: The processor draws a maximum current of 0.090 A at 5V DC from the backplane.

Wiring & Installation:

Q: Which communication protocol is supported by the built-in communication interface on the 1747-L514?

A: The processor supports the DH-485 communication protocol via its dedicated port.

Troubleshooting & Compatibility:

Q: What does the illumination of the Fault LED on the 1747-L514 processor module typically indicate?

A: The Fault LED signals a critical system error, such as a backplane or module malfunction.

Replacement & Upgrades:

Q: What memory capacity constraint must be considered when migrating from the 1747-L514 to a modern controller?

A: The 4 KB program memory size dictates that the replacement must handle the existing application code size.