Allen-Bradley 1756-PB72 Power Supply Module for ControlLogix

The Allen-Bradley 1756-PB72 ControlLogix Power Supply Module delivers 75 W of regulated DC input power to ControlLogix PLC racks, providing reliable backplane power for multi-slot configurations such as the 1756-A17 17-slot chassis. It accepts 18–32 V DC input, draws approximately 4 A at 24 V, and supplies backplane rails of 5 V DC @ 13 A and 24 V DC @ 2.8 A to support the ControlLogix backplane. This chassis-mounted, internal PLC power supply is compatible with 1756-A17 and other ControlLogix chassis, and includes overload, overvoltage, and short-circuit protection to help maintain system uptime. Operating temperature is 0°C to +60°C, storage temperature is -40°C to +85°C, and it carries an IP20 enclosure rating with CE, UL, and CSA compliance. In typical industrial applications, it is used to power large ControlLogix racks in manufacturing lines, material handling systems, and process environments where stable, standards-compliant power for PLC systems is critical. Common replacements include 1756-PB75, 1756-PA72, and Siemens SITOP PSU8200 for cross-family sourcing.