Device for monitoring the rotational speed of a vehicle wheel and at least one other variable of the vehicle
The monitoring device has a revolution sensor (1) for detecting the rotation rate of the vehicle wheel and a parallel sensor (6) for detecting the brake pad wear, both sensors coupled to a remote evaluation stage (10) via a common line (9). The sensors provide binary output signals and are connected in series with respective current sources (4,7), with that for the revolution sensor having the higher current value. The evaluation stage has a comparator (11) supplied with respective threshold values for the revolution sensor signals, corresponding to the different current source values.