Data transmission device, data reception device and data transmission system

A receiving device configured to receive data, said receiving device comprising:

• a receiver comprising:
• an input configured for receiving a carrier wave modulated by a signal representative of data;
• and
• a supplemental input;
• a communication link connected to the input of the receiver, wherein the communication link is intended to be brought to a supply voltage and to transmit the modulated carrier wave;
• at least one power line connected to the communication link at a connection point;
• at least one capacitive coupling component connected between the input of the receiver and the connection point, wherein said capacitive coupling component is configured to send the modulated carrier wave and to block the transmission of the supply voltage;
• an electrical equipment connected to the power line;
• a supplemental communication link connected to the supplemental input;
• a supplemental power line connected to the supplemental communication link at a supplemental connection point;
• at least one supplemental capacitive coupling component connected between the supplemental input of the receiver and the supplemental connection point, wherein said supplemental capacitive coupling component is configured to send the modulated carrier wave and to block the transmission of the supply voltage;
• and
• a transformer connected to the power line and the supplemental power line, said transformer being connected between on one side, the electrical equipment and on the other side, the connection point and the supplemental connection point, said transformer configured for blocking the transmission of the modulated carrier wave.