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Control system employing a programmable multiple channel controller for transmitting control signals over electrical power lines

  • US 4,060,735 A
  • Filed: 07/12/1976
  • Issued: 11/29/1977
  • Est. Priority Date: 07/12/1976
  • Status: Expired due to Term
First Claim
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1. In a control system wherein functional devices are controlled in response to control signals transmitted over an electrical power distribution network of a building complex including power lines which conduct cyclical AC power signals, a control arrangement comprising transmitter means including timing means coupled to one of said power lines and responsive to a plurality of cycles of said power signals to define a like plurality of data channels which comprise a data frame, and signal means responsive to said timing means for providing control signals at a predetermined frequency which are coupled to said power line during selected ones of a plurality of said data channels for transmission over said power distribution network, and a plurality of receiver means each individually associated with a different one of said functional devices, each of said receiver means including input means coupled to one of said power lines for detecting said control signals, and enabling means for enabling the associated receiver means to respond to control signals in at least one of said data channels for controlling the associated functional device.

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