Self-sequencing data bus allocation system

Details Self-sequencing data bus allocation system Self-sequencing data bus allocation system

H - Electricity

04

B

340/79

H04B 3/54 (2006.01) H04Q 9/00 (2006.01)

Patent

CA 1194956

SELF-SEQUENCING DATA BUS ALLOCATICIN SYSTEM Abstract of the Disclosure A plurality of data communication devices of the type which operate to communicate with a data bus responsive to the receipt of a prescribed voltage are triggered automatically in a prescribed sequence without separate addressing from a central point. Each data communication device (which may be uni- or bi-directional) is connected to a common multi-wire electrical cable by means of a control station, which taps a power supply line from the main cable and directs the power to its corresponding data communication device. The data communication device is thus activated so as to permit it to transmit its data onto the data bus of the main cable. Upon completion, the data communication device ceases drawing power which indicates to the system that it has finished, whereupon the next-in-line control station initiates the process with its corresponding data communication device.

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