Allen-Bradley 1746-P1 Power Supply Module

The Allen-Bradley 1746-P1 Power Supply Module delivers regulated backplane power to an SLC 500 chassis, energizing the backplane and installed I/O modules to support reliable PLC operation across industrial control panels and manufacturing environments. Manufactured by Allen-Bradley (Rockwell Automation), this PLC power supply for the SLC 500 platform accepts 120/240 V AC input at 47–63 Hz and outputs backplane power for 1746 SLC 500 racks, mounting on the left side of the rack for standard installation. The module is commonly used to energize CPUs, communication modules, and I/O cards in industrial automation systems, supporting plants in manufacturing, water treatment, material handling, and processing operations where stable, dependable backplane power is essential for uptime and performance. For replacements, common options include Allen-Bradley 1746-P2 and 1746-P4, with Siemens 6EP1333-3BA10 listed as a compatible alternative. It is designed for chassis-mounted installation on the left side of 1746 racks and is intended for use in legacy SLC 500 control systems where maintaining consistent backplane power is critical.