Integrator’s brief
The Siemens 6ES7507-0RA00-0AB0 is the 60 W system power supply for the S7-1500 rack. It takes 120/230 V AC or DC and feeds 60 W to the backplane bus, keeping the CPU and I/O modules powered. Rated for 0.6 A at 120 V and 0.34 A at 230 V AC — so it'll handle a fully populated rack within its power budget. The 20 ms hold-up time on mains failure gives the CPU just enough time to write a safe-state to the process image. Mounts on a DIN rail, 70 mm wide, 129 mm deep, IP20. Isolation test: 2 500 V DC for 2 s.