Siemens 6ES7405-0RA02-0AA0 Power Supply Module. The recorded exact-product description states: SIMATIC S7-400, power supply PS405: 20 A, wide range, 24/48/60 V DC, 5 V DC/20 A,. This is a legacy installed-base replacement listing for S7-300/S7-400 demand and is not represented as a current platform.