| 摘要 |
A power line communication system includes a master ECU for supplying electric power, a plurality of slave ECUS and a plurality of power-supply lines connecting the slave ECUS to the master ECU respectively. The power-supply lines including at least one first power-supply line on which a control signal is superimposed and at least one second power-supply line on which no control signal is superimposed. The control signal is superimposed on the first power-supply line by the master ECU and also communicated between the master ECU and the slave ECUS connected to the first power-supply line. Impedance per unit length of the first power-supply line is set smaller than impedance per unit length of the second power-supply line.
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