Siemens 6ES7 407-0RA01-0AA0 Power Supply Module

Siemens PS407 power supply module for SIMATIC S7-400, part number 6ES7407-0RA01-0AA0, is a rack‑mount dual‑rail power source that feeds the S7‑400 PLC rack with both a 5 V DC output (20 A) and a 24 V DC output (1 A). It accepts a wide input range of 85–264 VAC or 88–300 VDC, enabling operation from common international mains without an external transformer. The 5 V rail powers critical logic and peripheral circuitry, while the 24 V rail supports auxiliary devices within the PLC ecosystem, making this PS407‑20A variant suitable for demanding industrial automation setups. As part of Siemens’ PS407 family, this module is designed for robust, continuous operation in challenging environments and is intended for use with S7‑400 CPUs, I/O modules, and other rack‑mounted components.