The Allen Bradley AB AC Power Supply 120V Module 1771-P4S /B is a power supply module specifically designed for use in industrial automation and motion control systems. Manufactured by Allen-Bradley, a well-known brand in the industry, this module is a reliable and high-quality component for PLCs and HMIs. With a focus on efficient power supply, this unit is designed to meet the needs of various business and industrial applications. Made in the United States, this power supply module is a crucial part of many automation systems, providing a steady and reliable source of power for efficient operation.