G3 standard based data repeater

The utility model discloses a G3 standard based data repeater, which comprises a main control MCU, a PLC modem circuit, an analog front-end circuit, a line driving circuit, an RS485 circuit, a serial port circuit and a power supply circuit, wherein the main control MCU is connected with the PLC modem circuit through a serial port, the PLC modem circuit is connected with the line driving circuit through the analog front-end circuit, and the line driving circuit is connected with a power line; the main control MCU is connected with the RS485 circuit; the serial port of the main control MCU is connected with the serial port circuit; and the power supply circuit provides a power supply for the circuits. The G3 standard based data repeater not only can amplify attenuated carrier signals and transmit the carrier signals again, but also can forward data, which is sent to a G3 carrier network by a concentrator, to a 485 network, and an electric energy meter adopting an RS485 mode in communication is brought to the co