In the UB20 series, PULS offers a new DC-UPS for universal use for output currents up to 20A. The unit, only 46mm wide, can be used with batteries between 3.9Ah and 130Ah and is thus suitable not only as short-term back-up power for controlled shut-down after a power outage, but also as emergency power feed until the fault can be rectified by the service staff.
In contrast to conventional DC-UPS, the buffer voltage of the UB20 can be set between 22.5V and 26V and thus the unit is also suitable for systems which are sensitive to voltage fluctuations.
Two series-connected 12V batteries, which are individually charged and monitored, are used as back-up power. This enhances the life of the batteries and avoids the need of matched batteries when a replacement is necessary.
The UB20 is self-explanatory, easy to operate and has extensive battery diagnostics and many protective functions installed. The output of the DC-UPS is decoupled from the input. Load circuits can therefore be split very simply into buffered and unbuffered branches. The energy of the battery can thus be used selectively.