A DC-UPS is a supplementary device for DC power supplies and bridge voltage interruptions on 24VDC busses. The energy storage element is one VRLA battery. The unique feature of the PULS DC-UPS is the “1 Battery Concept”, which achieves the longest service life for batteries. For the individual demands of different applications, several DC-UPS controller units are available. Programmable Logic Controllers (PLCs) or industrial PC’s only require buffering for a few minutes. Therefore the UBC10.241 or UB10.241 in combination with a small battery would provide an optimal solution. Security systems and remote applications often require buffer times of up to 72 hours. For these purposes, the UB10.242 can be used with batteries up to 130Ah. A DC-UPS with an integrated 12VDC output is also available.