Siemens 6ES7407-0KR00-0AA0 Programmable Logic Controller Module

Siemens 6ES7407-0KR00-0AA0 is the PS 407 10A R redundant power-supply module for SIMATIC S7-400 racks, engineered to provide a second, fail-safe source of DC power to the backplane and all connected I/O modules, supporting hot-swappable operation within the rack architecture. It accepts a broad input window—85 to 264 VAC or 88 to 300 VDC—and delivers two regulated outputs: 5 VDC at up to 10 A and 24 VDC at 1 A, enabling separate rails for central logic supply and the rack's distribution network. The R suffix denotes redundancy, and Siemens documents guidance to install two PS 407 power-supply modules in the rack (typically in slots 1 and 3) to ensure uninterrupted operation and automatic handover in the event of a failure. This specific variant is identified by order number 6ES7407-0KR00-0AA0 and is part of the S7-400 automation system module lineup. It is designed for mounting in standard SIMATIC S7-400 racks and is commonly paired with a second PS 407 module to form a redundant supply that supports ongoing operation during maintenance or a fault.