Allen-Bradley 1747-L524 SLC 500 Modular Controllers

The Allen-Bradley 1747-L524, also cataloged as the 1747-L524 SLC 5/02 Processor Module, serves as the primary 1747-L524 CPU Processor utilized to execute central logic processing tasks across SLC 500 Modular Controllers platforms.

Hardware Specifications

Industrial Control & Drive Integration

The 1747-L524 executes localized instruction routines directly tied to the backplane bus communication velocity specifications of the SLC rack infrastructure. Configured to handle extensive register mapping, the hardware supports system expansion via networks like DH-485, interfacing with peripheral data modules on Profinet / EtherNet/IP deterministic networks via network gateway modules. To sustain predictable data cycles through the 30 available local slots, the central processor requires strict firmware flash compatibility verification across all distributed digital and analog I/O modules during initial rack configuration.

Frequently Asked Questions

Q: What are the integrated memory retention limitations of the 1747-L524 if primary power is lost?

A: The standard onboard capacitor retains user memory for a duration of 2 weeks if unpowered under standard thermal conditions. For extended protection up to 5 years, an auxiliary 1747-BA lithium battery must be connected to the dedicated internal battery socket.

Q: Can this processor module be inserted or extracted from the SLC chassis while backplane power is active?

A: No. The SLC 500 hardware framework does not support Removal and Insertion Under Power (RIUP). Prior to removing or installing the processor module, the master chassis power supply must be entirely isolated to avoid physical destruction of the logic circuits or internal address lines.

Field Installation Guidelines

• Chassis Slot Placement: The 1747-L524 processor module must always be installed in Slot 0 (the leftmost slot) of the primary SLC 500 chassis. Align the circuit board edges with the chassis tracks and slide the card inward until the retaining tabs lock completely into the frame.
• Network Cable Termination: Connect the DH-485 network cable to the front-facing RJ45 jack using proper industrial grade shielding. Route all communication cables separately from high-voltage AC lines to prevent magnetic noise induction into the data registers.
• Chassis Ground Requirements: Verify that the primary SLC chassis ground terminal is bonded to the main functional earth ground bus bar using an appropriate low-impedance conductor to fulfill NEMA Standard ICS 2-230 noise immunity standards.