Remote sensor communications system and method

H - Electricity – 04 – L

Patent

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Details

340/86

H04L 5/14 (2006.01) H04Q 9/14 (2006.01)

Patent

CA 2024503

PATENT Abstract A four-wire system is disclosed for communicating between the host station and several remote stations. A first pair of wires is employed across which the remote stations are coupled in shunt, and over which the host station addresses the particular remote station with which it wishes to communicate, and supplies power to the several remote stations. The remote stations are coupled in shunt to a second pair of wires and transmit real time analog information to the host station over the second pair of wires. Each remote station includes a receiving section, which determines whether an address appearing on the first pair of wires corresponds to the particular remote station, and if so, activates power to a transmitting section therein. The transmitting section responds to control information extracted by the receiving section from the address and transmits selected real time information back to the host station over the second pair of wires by way of a differential voltage format. The control information includes instructions as to the source of real time information to be transmitted by the transmitting section to the host station.

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