Allen-Bradley 1771-P7 120/240V AC Power Supply

Allen-Bradley 1771-P7 is a stand-alone AC power supply for PLC-5 1771 I/O backplanes. It accepts 120 V AC or 240 V AC input, with two common ranges: 97–132 V AC and 195–264 V AC, making it versatile across regional power standards. It delivers a 5 V DC backplane supply, capable of up to 16 A of backplane current to power the 1771 backplane and attached I/O modules. In typical 1771 racks, the 1771-P7 can power one 1771-A1B, -A2B, or -A3B I/O module in the chassis, providing a compact, dedicated source of backplane power. This model is the standard external power option for Bulletin 1771 backplanes in PLC-5 configurations, ensuring voltage stability for legacy I/O cards and enabling straightforward replacement or servicing of aging power components.