The XCSU5220W024VAA device, connected to a power supply, is able, at the same time, to supply the load and to charge a backup battery, in order to assure the service continuities.

When in backup mode (the load is supplied by the battery), the device continuously checks the battery voltage avoiding deep discharging situations.

Furthermore, this device is able to start the loads only with the batteries, therefore without the primary voltage.

This happens thanks to an input of the device where we can connect to an external button.