Siemens 6ES7407-0KA02-0AA0 Power Supply Module

Siemens 6ES7407-0KA02-0AA0 PS407 Power Supply is a DIN-rail module that provides the 5 V DC backplane power for SIMATIC S7-400 systems. It converts 120/230 V AC input into a regulated 5 V DC output capable of up to 10 A, for the PLC CPU, I/O, and attached modules. This universal input (UC 120/230 V) supports 50/60 Hz mains, making it suitable for international installations. The 6ES7407-0KA02-0AA0 designation identifies the standard PS407 variant with 10 A capacity; optional backup battery is listed as 1 x lithium AA (3.6 V, 2.2 Ah) for memory retention in the event of a power interruption. In SIMATIC S7-400 deployments, PS407 supplies the essential DC power to the rack backplane and connected devices, ensuring stable operation across the system. The module is commonly described as part of the S7-400 PS407 family, designed for industrial automation environments that demand reliable, wide-range power conversion.