The Allen-Bradley 1747-L514, also cataloged as the 1747-L514 SLC 5/01 Controller, operates as a dedicated CPU component for ladder logic execution and DH-485 communication within SLC 500 control systems.

Model Identification

The Allen-Bradley 1747-L514 is an SLC 5/01 CPU module with 4K RAM memory and DH-485 communication capability. It is designed for installation in SLC 500 chassis assemblies and provides processor control functions for connected I/O modules.

Hardware Specifications

SLC 500 Processor Architecture

The 1747-L514 functions as the processing unit within an SLC 500 control platform. It executes stored user programs, manages processor operation, and exchanges data with SLC chassis I/O modules through the system backplane.

The SLC 5/01 processor uses DH-485 communication for local network connectivity and controller data exchange. The module belongs to the early SLC 500 processor family and does not use Ethernet/IP based communication.

Processor and Backplane Integration

The 1747-L514 is designed for SLC 500 rack-based systems where CPU control, I/O expansion, and power distribution are managed through the chassis backplane.

Allen-Bradley SLC processors use deterministic backplane communication between CPU modules and I/O assemblies. Proper slot positioning, chassis compatibility, and firmware matching are required when integrating replacement processors into existing systems.

Ordering Information

• 1 x Allen-Bradley 1747-L514 SLC 5/01 CPU Controller Module
• Additional SLC chassis, power supply, communication cables, and programming accessories are not included unless specified.

Field Installation Guidelines

Module Installation

• Disconnect chassis power before removing or installing the CPU module.
• Install the processor into a compatible SLC 500 chassis slot.
• Verify module seating and locking mechanism before applying power.

Communication Setup

• Confirm DH-485 network wiring before connecting communication devices.
• Use the correct programming cable and communication configuration for the SLC 5/01 platform.
• Check controller status indicators during startup diagnostics.

Maintenance Checks

• Inspect the module connector and chassis backplane contacts for contamination.
• Verify processor status LEDs during troubleshooting.
• Confirm user program compatibility before replacing an existing CPU.

Frequently Asked Questions

• What is the main function of Allen-Bradley 1747-L514?

The 1747-L514 is an SLC 5/01 CPU module used for program execution, controller operation, and communication within SLC 500 systems.

• How much memory does the 1747-L514 provide?

The 1747-L514 provides 4K RAM memory for storing controller application programs and processor data.

• What communication protocol does this CPU support?

The module supports DH-485 communication for local controller networking and programming access.

• Is the 1747-L514 an Ethernet communication processor?

No. The SLC 5/01 processor family uses DH-485 communication and does not provide native Ethernet/IP connectivity.

• Can the 1747-L514 be hot-swapped during operation?

Hot-swapping is not specified. Power should be removed before replacing the CPU module.

• What chassis is required for this processor?

The 1747-L514 requires a compatible Allen-Bradley SLC 500 chassis and power supply assembly.

• Is firmware compatibility required when replacing this CPU?

Yes. Existing application programs and system configuration should be checked for processor compatibility before replacement.

• What maintenance actions are recommended for this module?

Inspect connectors, verify chassis seating, check status indicators, and confirm proper program execution during system operation.