The 1756-PB75R is a power supply module manufactured by Allen-Bradley, a brand owned by Rockwell Automation. This module is typically used in the ControlLogix series of Programmable Logic Controllers (PLCs) to provide power to the control system.

The 1756-PB75R is a redundant power supply module, which means it is designed for applications where system uptime and reliability are critical. It features two power supply modules that operate in parallel, providing redundant power to the system. If one of the power supply modules fails, the other module automatically takes over to ensure continuous operation without interruption.

The 1756-PB75R module is capable of accepting a wide range of input voltage, typically ranging from 85 to 265 Volts AC or 95 to 370 Volts DC. It provides regulated and isolated DC output voltage to power other modules in the ControlLogix chassis, such as controllers, input/output modules, and communication modules.