Reverse protection diode

When operating multiple power supplies in parallel, if the output of each power supply becomes unbalanced, reverse voltage may be applied from the higher-output power supply to the lower-output one. Therefore, a diode is connected in series with each power supply to prevent reverse voltage. Insert a reverse protection diode so that it is forward-biased with respect to the power supply voltage of each unit. When the outputs of the power supplies are balanced, current flows in the forward direction, but if they become unbalanced and reverse voltage is applied, it prevents current from flowing in the reverse direction and protects the power supplies.