Allen-Bradley 1769-PA4 DC Power Supply Module

The Allen-Bradley 1769-PA4 is a 120/240V AC power supply module that provides regulated backplane power for CompactLogix controllers and 1769 Compact I/O modules. It converts incoming AC line voltage to the required 5V DC and 24V DC backplane power, delivering up to 4A at 5V DC (module dependent), with auto-selectable input from 85–265V AC at 47–63 Hz. The unit mounts on a panel or DIN rail and uses input-to-backplane isolation to support reliable operation in environments from 0 to 60°C. Intended for energizing CompactLogix controllers and 1769 I/O modules in distributed or standalone automation systems, it sees use in assembly machines, conveyor systems, processing equipment, and OEM-built machinery; common replacement options include 1769-PA2, 1769-PB4, and 1769-PB2.