Data network interface module

Details Data network interface module Data network interface module

H - Electricity

04

B

354/1, 379/45, 3

H04B 1/74 (2006.01) H04L 12/40 (2006.01)

Patent

CA 1245356

ABSTRACT The invention relates to an interface module for the bidirectional transmission of data streams in a data network with separate power supplies for the individual bus stations. According to the invention, means are provided for bridging the bus station, preferably via normally closed contacts of a relay connected to the supply voltage and for simulating the ready condition if the power supply in the interface module fails. The latter consists of an OR circuit which is supplied on the one hand, via an operational amplifier and an RC section, with a constant delay and, on the other hand, via an optical coupler taking off the input signal, and a Schmitt trigger connected thereto.

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