Cable circuit for the connection of a sensor module with a transmitter, wherein said circuit has - a non-contact interface for signal transmission between the cable circuit and the sensor module, wherein the sensor module is galvanically isolated from the cable circuit, and wherein the signal transmission between the cable circuit and the sensor module takes place inductively, - a cable interface designed to connect a cable, wherein said cable connects the cable circuit to the transmitter, characterized in that the cable circuit further comprises a signal processing unit, a modulator and a demodulator, wherein the signal processing unit comprises a microcontroller, - in that the signal processing unit is integrated in the signal path, - in that the signal processing unit is designed to receive signals from the transmitter via the cable interface, to process them and to send them to the sensor module via the modulator and the non-contact interface, wherein the modulator is designed to modulate a high-frequency signal for transmission via the inductive interface according to the data to be transmitted, and to receive signals from the sensor module via the non-contact interface and the demodulator, prepare them and send them to the transmitter via the cable interface, wherein the demodulator is designed to extract the modulated data from the high-frequency signal and to forward these data to the microcontroller integrated in the signal path, wherein the signal processing unit inserts own messages in the telegrams sent by the transmitter to the sensor module, wherein the transmitter is configured as a master, the sensor module being configured as a slave and the cable circuit being configured as a slave arranged at the same level as the sensor module, and - in that the signal processing unit acts as a repeater for signal transmission in both transmission directions between the transmitter and the sensor module in order to improve the signal quality and reduce the frequency of transmission errors. - a non-contact interface for signal transmission between the cable circuit and the sensor module, wherein the sensor module is galvanically isolated from the cable circuit, and wherein the signal transmission between the cable circuit and the sensor module takes place inductively, - a cable interface designed to connect a cable, wherein said cable connects the cable circuit to the transmitter, characterized in that the cable circuit further comprises a signal processing unit, a modulator and a demodulator, wherein the signal processing unit comprises a microcontroller, - in that the signal processing unit is integrated in the signal path, - in that the signal processing unit is designed to receive signals from the transmitter via the cable interface, to process them and to send them to the sensor module via the modulator and the non-contact interface, wherein the modulator is designed to modulate a high-frequency signal for transmission via the inductive interface according to the data to be transmitted, and to receive signals from the sensor module via the non-contact interface and the demodulator, prepare them and send them to the transmitter via the cable interface, wherein the demodulator is designed to extract the modulated data from the high-frequency signal and to forward these data to the microcontroller integrated in the signal path, wherein the signal processing unit inserts own messages in the telegrams sent by the transmitter to the sensor module, wherein the transmitter is configured as a master, the sensor module being configured as a slave and the cable circuit being configured as a slave arranged at the same level as the sensor module, and - in that the signal processing unit acts as a repeater for signal transmission in both transmission directions between the transmitter and the sensor module in order to improve the signal quality and reduce the frequency of transmission errors.