Sensor arrangement for measuring physical value of e.g. brake pressure, fuel pressure in motor vehicle has output device which outputs first signal to output line in absence of second signal

摘要

A sensor circuit (21) is connected between a voltage supply line (P) and a grounding line (G), and outputs a first signal which represents a measured physical value. An oscillator (25) is connected to a voltage detector (24) and outputs a second signal. An output device (23) outputs the first signal to an output line (O) in the absence of the second signal, otherwise, the second signal is output. The voltage detector issues a functional disruption signal between the voltage supply line and the grounding line, if a recorded voltage lies outside an enclosed region. The second signal from the oscillator oscillates between a high level signal and a low level signal according to the reception of the functional disruption signal generated by the voltage detector. The sensor arrangement (20) is connected to a control circuit (10) via the voltage supply line, the grounding line and the output line.