A medical device includes a medical function unit, an electronic control unit, and a voltage supply for the medical function unit and/or the electronic control unit, wherein the voltage supply is configured to be connected to a wired external supply voltage network, and wherein the electronic control unit includes a data interface in order to exchange data with an external device. The medical device wherein the data interface is configured to transmit and/or to receive data via at least one conductor of the supply voltage network. Furthermore, a medical device system is included.
