Allen-Bradley 1756-PA72 AC Power Supply Module

The Allen-Bradley 1756-PA72 ControlLogix AC Power Supply Module converts 85–265 VAC input into a regulated 5 VDC output capable of delivering up to 10 A to the 1756 chassis backplane and I/O. Designed for ControlLogix 1756 chassis, the PA72 is installed on the left side of the chassis and, as with other 1756 power supplies, one module is required per chassis to maintain a stable power rail. Key electrical specs include an input range of 85–265 VAC at 47–63 Hz, an input power rating around 100 VA with a maximum real input power near 95 W, and a 5 VDC output capable of up to 10 A. The module weighs approximately 0.95 kg (about 2.1 lb), reflecting its compact, rugged construction suitable for industrial environments, and it operates from 0 to 60 °C. In typical ControlLogix configurations, it powers the CPU and I/O modules within the 1756 system, providing a dedicated, centralized power source on the chassis to support reliable automation operations.