"The DC/DC 52V/2.3A booster module (DC/DC52230) is used to maintain a constant output voltage of 18÷28VDC at the 52 V DC voltage at the converter output. The maximum load current is Imax = 2.3 A (Pmax = 120 W). The module does not have galvanic isolation between the input / output (IN-AUX), it operates on the common ""ground"" potential (0V) (the IN- and AUX- terminals are galvanically connected = common terminal)."