External Battery Backup Unit
The external battery backup unit, EBU-120, is an optional compact device that is capable of connecting external battery with a switch to reach power redundancy.
That is, EBU-120 is rendered a bridge between battery and switch. Upon power failure, the external battery actuates automatically with supplying 12V DC power. After power source from adaptor is restored, EBU-120 would change over the power source from battery to adaptor and recharge the battery immediately.