A drive system includes a line assembly configured to connect a power converter to an electric motor which has a brake and an encoder. The line assembly has at least two power lines and only two brake lines exclusively to provide a data transfer between the power converter and the electric motor and to transfer energy to the encoder. The power converter applies a first supply voltage of a first polarity and a second supply voltage of a second polarity opposite to the first polarity to the brake lines for supplying the brake and the encoder. The electric motor supplies the encoder with the respective supply voltage independently of its polarity and the brake with the respective supply voltage depending on its polarity.