Siemens 6ES7407-0RA01-0AA0 Communication Module

The Siemens PS 407 20A power supply module for the SIMATIC S7-400 automation system, part number 6ES7407-0RA01-0AA0, delivers a 5 V DC output rated at 20 A to power the S7-400 rack’s CPUs and I/O modules. It accepts a universal AC input of 120/230 V (50/60 Hz), providing the necessary DC rail for the system’s components and attached peripherals in industrial control installations. Identified as the 20 A PS 407 variant, this module is designed to accompany S7-400 hardware within Siemens’ automation ecosystem and is compatible with the S7-400 family according to official datasheets and product data. Applications include mid- to high-current 5 V DC supply needs in manufacturing lines, process control, and other Siemens SIMATIC-based control setups where reliable, dedicated power is required for the 5 V rail across multiple modules in the same rack.