| 摘要 |
<p>Procedure and apparatus for the protection of a data transmission network consisting of a signal bus (4,5) provided with terminal impedances (R1,R2) and of signal devices (6,7) connected to the bus. To protect the network, the voltage in the bus is monitored, the bus being connected via impedances (R1,R2) to the supply voltage (+VIN) and signal ground (GND), the bus impedance is measured by means of a test pulse sent into the bus and the supply of electricity from the supply voltage (+VIN) at least to the signal devices is inhibited if either the voltage or the impedance or both are outside the allowed range.</p> |
