UNITÉ D'INTERFACE, SYSTÈME ET PROCÉDÉ DE TRANSMISSION DE DONNÉES PAR L'INTERMÉDIAIRE D'UNE CONDUITE D'ALIMENTATION ÉLECTRIQUE

摘要

An interface unit for transmitting data from a terminal (10) via a power supply line (12) to a data sink (15) is described. The interface unit comprises:a communication interface (4) adapted to receive a first communication signal from the terminal (10),a first transducer (5) connected to the communication interface (4) for receiving the first communication signal and configured to generate a control signal from the first communication signal;a power supply input (6) for inputting an input voltage (Uin) from a power supply (11) connected to the power supply input (6),a power supply output (7) for outputting an output voltage (U 3) to the power supply line (12),Means for generating a DC voltage (8) from the input voltage (U in) andan output stage (9) whose control input for receiving the control signal (U 2) is connected to the first converter (5) and which generates the output voltage (U 3) from the DC voltage (U 1) based on the control signal (U 2) and to the power supply output (7) outputs.In this case, the output stage (9) outputs a first level or a second level as the output voltage (U 3). The output stage (9) changes the output voltage (U 3) between the first level and the second level in such a way that the data contained in the communication signal are coded in the time profile of the output voltage (U 3). Furthermore, a system using this interface unit and a corresponding method are disclosed.