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Interface adapter for interfacing a remote controller with commercial refrigeration and environmental control systems

  • US 4,829,779 A
  • Filed: 12/15/1987
  • Issued: 05/16/1989
  • Est. Priority Date: 12/15/1987
  • Status: Expired due to Fees
First Claim
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1. In combination with a commercial installation having a central refrigeration system with multiple compressors and refrigerated units and also having environmental apparatus for regulating the heating ventilating and air conditioning of such installation, said refrigeration system having local control means for operating said refrigeration system in response to local status signals and having remote control input ports for remote control of the refrigeration system;

  • and a remote electronic controller adapted to receive the local status signals and to override at least part of said local control means and operate said refrigeration system by generating an electrical control signal and a switchback signal indicating that the electrical control signal should be recognized;

    the improvement comprising;

    interface adapter means for electronically interfacing said refrigeration system and said remote controller including;

    means responsive to the switchback signal for providing the electrical control signal of the remote controller with the remote input ports of the refrigeration system; and

    means for providing at least one of the local status signals to the remote controller.

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