Load control system
First Claim
1. A load control system comprising:
- a plurality of branch power lines;
a plurality of loads selectively connectable to ones of said branch power lines;
a plurality of terminal means for controlling the connecting status of respective ones of said loads, the terminal means being connected to ones of said branch power lines and each terminal means controlling its respective load in response to a control signal received via its respective branch power line;
a plurality of gateway means for converting load control signals received from a central control means into said control signals and for transmitting said control signals to said terminal means via the branch power lines, each gateway means being provided for a respective one of the power lines such that one gateway means is connected to each branch power line, wherein each gateway means is connected directly to said central control means; and
signal transmission means connected between each said gateway means and said central control means for directly communicating said load control signals from said central control means to said gateway means.
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Accused Products
Abstract
An improved luminaire load control system for handling control signals as by converting them into power line carrier communication signals which are transmitted through branch power lines to terminal control units without causing any significant interference to power line installation, the conversion of the control signals is done respectively at a plurality of gate way units mounted on each branch power line and each gate way unit further includes memory unit for storing the information regarding to the connecting status of the terminal unit for sending back the stored information to a central control unit upon receipt of a send back command therefrom. In a specific embodiment of the invention, a plurality of gate way units are mutually connected with specific signal transmission lines for providing the reciprocity control of luminaire loads by installing a plurality of operation command input terminals in each of the branch power line, whereby the control signal is transmitted through the specific signal transmission lines.
29 Citations
11 Claims
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1. A load control system comprising:
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a plurality of branch power lines; a plurality of loads selectively connectable to ones of said branch power lines; a plurality of terminal means for controlling the connecting status of respective ones of said loads, the terminal means being connected to ones of said branch power lines and each terminal means controlling its respective load in response to a control signal received via its respective branch power line; a plurality of gateway means for converting load control signals received from a central control means into said control signals and for transmitting said control signals to said terminal means via the branch power lines, each gateway means being provided for a respective one of the power lines such that one gateway means is connected to each branch power line, wherein each gateway means is connected directly to said central control means; and signal transmission means connected between each said gateway means and said central control means for directly communicating said load control signals from said central control means to said gateway means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A load control system comprising:
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at least one branch power line; a plurality of loads selectively connectable to said branch power line; at least one terminal means for controlling a connection status of respective ones of said loads, the terminal means being connected to said branch power line and controlling said respective loads in response to a control signal received via said at least one branch power line; a gateway means for convening load control signals received from a central control means into said control signals and for transmitting said control signals to said terminal means via said branch power line; a circuit breaker connecting said branch power line to a power source; and a block filter connected in said branch power line between said circuit breaker and said terminal means, said gateway means being connected to said branch power line between said blocking filter and said terminal means, said blocking filter thus preventing leakage of said control signals from said gateway means upstream with respect to a direction of power flow. - View Dependent Claims (8, 9)
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10. A load control system comprising:
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a plurality of branch power lines; a plurality of loads selectively connectable to ones of said branch power lines; a plurality of terminal means for controlling the connection status of respective ones of said loads, the terminal means being connected to ones of said branch power lines and each terminal means controlling its respective load in response to a control signal received via its respective branch power line; a plurality of gateway means for converting load control signals received from a central control means into said control signals and for transmitting said control signals to said terminal means via the branch power lines, each gateway means being provided for a respective one of the power lines such that one gateway means is connected to each branch power line, wherein each gateway means is connected directly to said central control means, each of said gateway means including signal transmitter/receiver means for communicating with the central control means through the signal transmission means, memory means for storing information, power line carrier communication signal transmitter/receiver means for communicating via said branch power line with terminal means connected thereto, and a control means for controlling the operation of the signal transmitter/receiver means, the memory means, and the power line carrier transmitter/receiver means. - View Dependent Claims (11)
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Specification