Allen-Bradley 1746-P1 SLC 500 Power Supply Module

The Allen-Bradley 1746-P1 SLC 500 Power Supply Module is a rack-mount power source for the SLC 500 modular PLC family, delivering a stable 5 V DC rail to the backplane and I/O modules in a standard SLC 500 rack. Catalog number 1746-P1, Series A, it accepts a wide-range AC input—85–132 V AC or 170–265 V AC at 47–63 Hz—and converts it to 5 V DC at up to 2 A to support the controller’s digital logic and I/O circuitry. The supply’s maximum real input power is specified as 42 W, reflecting its role as the main power source for the chassis rather than a small auxiliary unit. Designed specifically for rack-mount installation in SLC 500 modular chassis, the 1746-P1 is part of the early generation of Allen-Bradley power supplies used to power backplanes and I/O modules in industrial control panels, making it a common choice for older AB SLC 500 systems that require a dedicated, standards-compliant 5 V rail.