| 摘要 |
A network interface, in particular for motor vehicles having at least two computers and having at least two bus lines ("0") includes by a monitoring circuit (100), which cooperates with an evaluation circuit to detect the operativeness of the bus lines and identify a faulty bus line and an emergency circuit (210,215) controlled by the monitoring circuit to connect the faulty bus line to an emergency potential. Even in the event of a short circuit, to the supply voltage UB or earth, of one of the bus lines connected to a terminating unit (OP1,R3; OP2,R4) or in the event of a defective driver stage (T10,T20) of a network substation connected to the bus lines, it is still possible to operate the comparator (K) of a receiver or signal evaluation circuit even with only one operational bus line. In this way, a particularly high operational reliability of the network interface is obtained.
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