Procedure and apparatus for protection of a data transmission network
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United States of America Patent
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Oct 6, 1992
Grant Date -
N/A
app pub date -
May 2, 1990
filing date -
May 2, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The protected network consists of a signal bus provided with terminal impedances and connected via impedances to the supply voltage (+VIN) and signal ground (GND), and signal devices which are connected to the bus. To protect the network, the voltages on the bus are monitored, and the bus impedance is measured by means of a test pulse. If either the measured voltages, impedance, or both are outside an allowed range, at least the supply voltage (+VIN) of the signal devices is disconnected.
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