Reverse polarity protection device

A reverse polarity protection device connected to a power supply device and at least two load devices, comprising:

• at least two protection units, each of the at least two protection units being electrically coupled between the power supply device and corresponding one of the at least two load devices;
• the at least two protection units respectively receiving one of a plurality of output signals from the power supply device and outputting the received one of the plurality of output signals to the corresponding one of the at least two load devices;
• a detection unit, electrically coupled to the power supply device, for detecting a polarity of each of the plurality of output signals of the power supply device;
• and
• a control unit, electrically coupled to the detection unit and each of the at least two protection units;
• wherein if the detection unit detects that the polarity of one of the plurality of output signals is reversed, the control unit controls a protection unit of the at least two protection units corresponding to the reversed output signal to form an open circuit between the power supply device and a load device of the at least two load devices connected to the protection unit of the at least two protection units corresponding to the reversed output signal,
• wherein when the detection unit detects the polarity of each of the plurality of output signals of the power supply device, the detection unit outputs detection signals each corresponding to a respective one of the plurality of output signals to the control unit, so that if any of the detection signals is a low level signal then the control unit controls the protection unit of the at least two protection units corresponding to the low level signal to form a short circuit between the power supply device and the load device of the at least two load devices corresponding to the low level signal, and if any of the detection signals is a high level signal then the control controls the protection unit of the at least two protection units corresponding to the high level signal to form an open circuit between the power supply device and the load device of the at least two load devices corresponding to the high level signal, and
• wherein each of the plurality of output signals is a voltage signal or a current signal.