Allen-Bradley 1747-L532 SLC 5/03 Processor Module

The Allen-Bradley 1747-L532, also cataloged as the SLC 5/03 processor module, operates as a dedicated control execution unit for instruction scheduling and I/O scan synchronization within SLC 500 chassis-based automation architectures. It performs deterministic logic execution while maintaining RS-232 and DH-485 communication processing in parallel with backplane scan cycles.

Hardware Specifications

Backplane Bus Execution & I/O Density Scaling

The 1747-L532 processor implements cyclic backplane arbitration where instruction execution is synchronized with chassis I/O refresh timing. I/O density scaling up to 4096 discrete points requires deterministic scan scheduling across multiple chassis links, with communication handled through DH-485 and RS-232 channels. Backplane current loading at 5 V DC defines total module population limits within the 1746 chassis architecture.

Frequently Asked Questions (FAQ)

Q: Can the 1747-L532 processor be hot-swapped in an active SLC chassis?
A: No. Removal or insertion requires chassis power shutdown due to backplane signal integrity and memory state coupling.

Q: How does backplane current consumption affect system expansion?
A: The 500 mA at 5 V DC load reduces available power budget for I/O modules and constrains maximum chassis population within electrical limits.

Q: Does program memory size affect scan performance?
A: Yes. Increased instruction density within 16K words affects scan cycle execution timing under fixed backplane scheduling.

Field Installation Guidelines

• Install processor exclusively in slot 0 of 1746 SLC 500 chassis

• Verify backplane voltage stability prior to insertion

• Maintain RS-232 and DH-485 cable shielding continuity to chassis ground

• Avoid routing communication cables parallel to high-noise motor power lines

• Ensure FLASH EEPROM module seating (1747-M13) is fully engaged

• Confirm lithium or backup memory retention configuration before commissioning