Data Sheet

45
The Power Bank (PG) is having two USB cables. The micro USB one is used to recharge the PB, the normal USB one is
supplying the 5V (connect it to 2A). The two cables are connected to the same “ground”. However, the micro USB red
wire (PB mUSB) is connected to NO (normally open) of RA2 mini-relay. The normal USB red wire (PB_USB2A) is
connected to NC (normally closed) of RA1 mini-relay. The mini-relay RA3, COM, corresponds to the permanent 5V. He
is connected to the RB_14 connector.
Detailed explanation: the mini-relay selects automatically the +5V source: Power bank by default or Charger when
this one is connected.
The Power Module works when the charger is connected to supply the parts in 5V and to charge the Power Bank
Câblage carte DC/DC au mini relais.