System comprising a controller and at least a first bus participant and a successor, i.e. a second bus participant, wherein the controller is connected, in particular is serially connected, and the successor can be connected to the first bus participant by means of a data bus, in particular a CAN bus, an RS485 bus or the like, wherein each bus participant, in particular the first bus participant, comprises a first circuit arrangement which is arranged between an output OUT of the first bus participant and an input IN of the first bus participant, wherein the successor comprises a second circuit arrangement which is arranged between an output OUT of the successor and an input IN of the successor, wherein the first and the second circuit arrangement are of identical and/or similar configuration, wherein the first and the second circuit arrangement have a supply voltage terminal, wherein the first circuit arrangement has a means for detecting the voltage, in particular to ground, that is present at the output OUT, a first resistor R4 is arranged between the output OUT and the supply voltage terminal, characterized in that a second resistor R2 is arranged between the input IN and a ground terminal, wherein by means of a first controllable semiconductor switch a third resistor R1 can be arranged between the input IN and the supply voltage terminal, in particular such that the third resistor R1 is arranged in parallel with the first resistor R4 when the successor is connected to the first bus participant, wherein by means of a second controllable semiconductor switch a fourth resistor R3 can be arranged between the output OUT and the supply voltage terminal, in particular such that the fourth resistor R3 is arranged in parallel with the third resistor R1 when the successor is connected to the first bus participant, a first protection circuit against excessively low and/or excessively high voltages is arranged at the input IN, a second protection circuit against excessively low and/or excessively high voltages is arranged at the output OUT, wherein a first capacitor is arranged between the input IN and ground, wherein a second capacitor is arranged between the output OUT and ground, wherein the first protection circuit has a resistor R6 arranged between the input IN and a first diode, wherein the first diode is arranged between the resistor R6 and the supply voltage terminal such that current is supplied to the supply voltage terminal through the first diode when a voltage higher than the supply voltage is present at the input IN, wherein a second diode is arranged between the resistor R6 and ground such that current is supplied to ground through the second diode when a negative voltage is present at the input IN. wherein the controller is connected, in particular is serially connected, and the successor can be connected to the first bus participant by means of a data bus, in particular a CAN bus, an RS485 bus or the like, wherein each bus participant, in particular the first bus participant, comprises a first circuit arrangement which is arranged between an output OUT of the first bus participant and an input IN of the first bus participant, wherein the successor comprises a second circuit arrangement which is arranged between an output OUT of the successor and an input IN of the successor, wherein the first and the second circuit arrangement are of identical and/or similar configuration, wherein the first and the second circuit arrangement have a supply voltage terminal, wherein the first circuit arrangement has a means for detecting the voltage, in particular to ground, that is present at the output OUT, a first resistor R4 is arranged between the output OUT and the supply voltage terminal, characterized in that a second resistor R2 is arranged between the input IN and a ground terminal, wherein by means of a first controllable semiconductor switch a third resistor R1 can be arranged between the input IN and the supply voltage terminal, in particular such that the third resistor R1 is arranged in parallel with the first resistor R4 when the successor is connected to the first bus participant, wherein by means of a second controllable semiconductor switch a fourth resistor R3 can be arranged between the output OUT and the supply voltage terminal, in particular such that the fourth resistor R3 is arranged in parallel with the third resistor R1 when the successor is connected to the first bus participant, a first protection circuit against excessively low and/or excessively high voltages is arranged at the input IN, a second protection circuit against excessively low and/or excessively high voltages is arranged at the output OUT, wherein a first capacitor is arranged between the input IN and ground, wherein a second capacitor is arranged between the output OUT and ground, wherein the first protection circuit has a resistor R6 arranged between the input IN and a first diode, wherein the first diode is arranged between the resistor R6 and the supply voltage terminal such that current is supplied to the supply voltage terminal through the first diode when a voltage higher than the supply voltage is present at the input IN, wherein a second diode is arranged between the resistor R6 and ground such that current is supplied to ground through the second diode when a negative voltage is present at the input IN.