Buffer power supply is designed in accordance with the requirements of (I and HAS) EN50131-6:2017, grade 1, 2 and II environment class and (KD) EN60839-11-2:2015+AC:2015 standard and I environment class. Power supplies units are intended for an uninterrupted supply of I and HAS and KD devices requiring stabilized voltage of 12 or 24VDC (+/-15%).