Allen-Bradley 1746-P1 SLC 500 PLC Power Supply

Allen-Bradley 1746-P1 is a rack-mount power supply for the SLC 500 modular PLC family, designed to reside in a 1746 chassis and provide the primary 5 V DC rail that powers I/O modules and the processor. It delivers 5 V DC at up to 2 A, supporting the SLC 500 backplane with two input voltage ranges: 85–132 V AC or 170–265 V AC (accommodating both 120 V and 240 V mains) and an operating frequency around 47–63 Hz. This model is the entry-level power supply in the 1746-P family, commonly used in discrete manufacturing and process automation applications where a compact, rack-mounted 5 V supply is required. Higher-current alternatives in the same family—1746-P2, 1746-P3, 1746-P4, and 1746-P5—offer increased output capability for larger I/O loads. In SLC 500 systems, the 1746-P1 typically powers the I/O racks and related peripherals, contributing to stable, reliable operation of the modular control system.