SPM-D2 standard version is available with a 24VDC power supply. 

In Utility and large power station 110VDC or 220 VDC power supply is quite usual.  

SPM-D2 with option N have an integral AC/DC power supply,  the values that we can grant for the input voltages come from suppliers datasheet of the used AC/DC power supply.

The values of suppliers' datasheet are:

– AC range (universal input) 88 – 264 VAC (47 – 63 Hz) +/-%10 Tolerance

– DC range 124 – 370 VDC  +/-%10 Tolerance