Siemens 6ES7405-0KA01-0AA0 SIMATIC S7-400 CPU Module

Siemens 6ES7405-0KA01-0AA0 is the PS 405 10A power supply module for the SIMATIC S7-400 rack system, delivering a stable 24V DC supply to the backplane and connected CPU and I/O modules. It provides up to 10 A of continuous output, supporting reliable operation of PLC logic, timers, counters, and peripheral devices within industrial control panels. The non‑redundant variant is designed for standard S7-400 installations and weighs approximately 1.2 kg, reflecting its robust, in‑cabinet construction. For redundancy, Siemens offers the PS 405 10A R variant, 6ES7405-0KR00-0AA0, to maintain power in case of a primary supply failure. This power supply module is commonly used in manufacturing automation, packaging lines, and process control applications where a dependable 24V power source is required to power both CPU modules and discrete I/O within a single S7-400 system. As part of the PS 405 family, it is a key component for ensuring consistent rack power distribution and stable PLC operation in industrial environments.