Deck unit circuit of AC 500V power line carrier shipboard communication system

The utility model relates to a deck unit circuit of an AC 500V power line carrier shipboard communication system. The circuit comprises a power circuit, an AC500V controllable circuit, a power line carrier module reception circuit, a level switching circuit, and a master control circuit. The power circuit supplies power for other circuits. The AC500V controllable circuit receives AC500V switching commands of the master control circuit to decide on-off of the AC500V of the AC500V controllable circuit. The power line carrier module reception circuit is connected with an AC500V end of the reception circuit controllable circuit, and demodulates received information to transmit to the master control circuit. The level switching circuit receives sensor data of the master control circuit and then uploads the data to an upper computer. A self-improved power line carrier module is used, so data transmission can be performed between the power line carrier module and an underwater system power line carrier module through an AC 500V power line, so as to acquire the sensor data of the underwater system.