| 摘要 |
An elevator signal transmitting apparatus of the invention has a parent station provided in a machine room so as to control signal transmission, a plurality of child stations respectively provided in halls so as to control signal transmission, first and second balanced transmission lines each having one end connected to the parent station, first and second unbalanced transmission lines each having one end connected to the plurality of child stations, a first interface unit connected to the other ends of the first balanced transmission line and of the first unbalanced transmission line so as to convert the balanced signal input from the parent station through the first balanced transmission line into an unbalanced signal and output the unbalanced signal to the plurality of child stations through the first unbalanced transmission line, and a second interface unit connected to the other ends of the second balanced transmission line and of the second unbalanced transmission line so as to convert the unbalanced signals input from the plurality of child stations through the second unbalanced transmission line into balanced signals and output the balanced signals to the parent station through the second balanced transmission line.
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