SITOP is Siemens’ industrial power-supply range for control panels. It includes 24 V DIN-rail supplies, UPS, buffer and redundancy modules, as well as PSN130S 30 V supplies for AS-Interface networks. Treat the AS-i supplies as a separate 30 V application: check whether the exact unit includes data decoupling and confirm network requirements before ordering.
Add the continuous 24 V load of everything in the panel, add 25–30 % headroom, then check the inrush of any contactor coils and drive control boards.
A buffer module carries a controller through millisecond-to-second supply dips using capacitors and needs no maintenance. A UPS module with a battery covers minutes, but the battery becomes a maintenance item. Most panels only need the buffer.
Yes. Siemens lists PSN130S 30 V DC units for AS-i. Check the exact part number because some models are supplied without AS-i data decoupling; confirm the network configuration before ordering.