Signal serial/parallel conversion system

Claim 1

A remote serial-to-parallel conversion type control system, comprising: a power transmission line; a central control station connected to a power supply source, said power supply source supplying an electric power signal, said central control station including clock signal generating means for generating a train of clock pulses, start signal generating means for generating a start signal in synchronism with a start clock pulse of said clock pulse train, and signal generating means for generating binary control information in synchronism with said clock pulses, wherein said binary control information and said clock pulses are superposed on said electric power signal by said signal generating means and sent out of said central control station on said power transmission line; and, at least one local station located remotely from said cental control station and having no power supply source, said local station being connected to said power transmission line for receiving said electric power signal and superposed binary control information and clock pulses from said central control station, wherein control pulse signals are serially sent from said central station to the local station through the medium of said power transmission line, said local station being so implemented as to control in parallel a plurality of devices connected thereto in response to receipt of said control pulse signals, said local station including power restoration means connected to said power transmission line for generating a source voltage required for driving said devices to be controlled, said power restoration means eliminating said binary control information and said clock pulses and outputting a stabilized power signal, start signal detecting means for detecting said start signal generated by said start signal generating means, signal extracting means for taking out said clock pulses and said binary control information from said power signal on said transmission line, signal distribution means responsive to said start signal and said clock pulses for generating distribution signals indicating destinations to which said binary control information is to be supplied, and output means provided at said destinations for generating control signals on the basis of said binary control information supplied from said signal extracting means and said distribution signals for controlling in parallel the states of said devices connected to said local station at the positions corresponding to said destinations and driven by said power.