Data transmission system utilizing power line

Details Data transmission system utilizing power line Data transmission system utilizing power line

H - Electricity

04

B

340/79

H04B 3/58 (2006.01) H04B 3/54 (2006.01)

Patent

CA 1194957

ABSTRACT OF THE DISCLOSURE A data transmission system utilizing a power line comprises a transmitter, a receiver and a repeater coupled to a power line. Control data including a start code in the form of a high frequency signal is transmitted from the transmitter in superposition on an alternating current of the commercial power supply using the power line. The repeater receives the control data transmitted from the transmitter, thereby to store the control data in a memory responsive to the start code. The control data is then read from the memory after the lapse of a predetermined period of time and is retransmitted to the receiver at a predetermined level. The receiver receives the control data, thereby to control an apparatus such as a relay, whereupon the same transmits in a return manner the data representing a control state thereof. The repeater receives the data and transmits the same to the transmitter.

408989

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