Allen-Bradley 1771-P7 is an external chassis power supply for PLC-5/1771 I/O racks, delivering 16 A of backplane power to a single 1771 I/O chassis when no internal supply is used. It accepts nominal 120 or 240 VAC input and is mounted as a standalone module within the 1771 environment. Designed to power a single 1771-A1B, -A2B, -A3B, or -A4B I/O chassis, it uses a 3 A, 250 V fuse and fits in a compact enclosure measuring 4.5 x 12.4 x 6.3 inches (115 x 317 x 160 mm).
