Siemens 6ES7405-0KA02-0AA0 Programmable Logic Controller CPU Module

Siemens 6ES7405-0KA02-0AA0 is a SIMATIC S7-400 PS405 power supply module designed to feed an entire S7-400 rack, delivering stable DC power to the mounted CPU, I/O, and communications modules. The module supports a wide-range DC input of 24, 48, or 60 V and is rated for up to 10 A of output current, providing the headroom needed for typical S7-400 configurations. An optional backup battery arrangement is available for memory retention during power interruptions, specified as 5 V DC/10 A with space for two lithium AA cells (3.6 V each, 2.2 Ah per cell). This PS405 variant is intended for use with standard SIMATIC S7-400 backplanes and is cataloged by Siemens and distributors as PS405 power supply for rack applications. Typical applications include industrial automation cells, packaging lines, and process control where a robust, centralized power source supports CPU modules, digital/analog I/O, and fieldbus interfaces in demanding factory environments.