COMMUNICATION CIRCUIT BETWEEN EMERGENCY POWER SUPPLY AND CONVENTIONAL POWER SUPPLY

Provided is a communication circuit between an emergency power supply and a conventional power supply, including an emergency power supply, a conventional power supply, a sending data line, and a receiving data line, where the sending data line and the receiving data line are connected to the conventional power supply through a communication interface, the sending data line and the receiving data line share one connecting line with a direct current power supply, and the direct current power supply subjected to capacitor rectifier filtering is connected to the communication circuit to achieve double line communication, with fewer connecting lines and without installation errors.