Vehicle with electric signal connection for trailer, has digital control signal for trailer superimposed onto positive power voltage signal

摘要

At least one output connection (24) for the signal processing devices (20, 26, 28, 29) is connected to the positive power voltage supply wire (5) for the trailer. These processing devices superimpose the digital control signal for the trailer onto the positive power voltage signal on the supply wire. The electric connection (1) comprises a first plug (4) for connecting to a second plug associated with the trailer, and a set of processing devices with input connections (70-79) and at least one output connection. The first plug has at least one connection connected to a power wire for supplying a positive power voltage signal to the trailer. The processing devices receive control signals (S1-S5) intended for the trailer and convert them into a digital control signal for sending to the trailer via the two plugs. An Independent claim is also included for a trailer which can be towed from this vehicle, which includes a second plug connected to a second positive voltage supply wire, and which is provided with a second set of processing devices for converting the digital control signal into a second set of control signals, where the processing device input is connected to the second positive voltage supply wire, and where the second processing devices are designed to receive the superimposed digital control signal and separate it from the positive power voltage signal.