The Allen-Bradley 1769-PA4 Compact I/O Selectable AC Power Supply provides backplane power for CompactLogix and MicroLogix 1500 control platforms, supporting operation of modular PLC I/O systems in industrial panels. It accepts 85–265 V AC at 47–63 Hz and delivers 4 A at 5.1 V DC and 2 A at 24 V DC to backplane-connected Compact I/O modules, with mounting options on DIN Rail or panel. Common installations include manufacturing machinery, conveyors, packaging equipment, and process automation control panels, with common replacements 1769-PB4, 1769-PA2, and 1769-PB2.
