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Two-wire control system

  • US 5,412,369 A
  • Filed: 12/22/1993
  • Issued: 05/02/1995
  • Est. Priority Date: 10/05/1990
  • Status: Expired due to Term
First Claim
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1. A two wire control system, comprising:

  • a source line isolator alternating between a high impedance state and a low impedance state, coupled at a first end to a power source and at a second end to at least one transmission wire, for isolating the power source from the transmission wire while in the high impedance state;

    a line load isolator alternating between a high impedance state and a low impedance state, coupled at a first end to the transmission wire and at a second end to at least one load, for isolating the transmission wire from the load while in the high impedance state; and

    means, coupled to the line load isolator, for synchronizing the high and low impedance state of the line load isolator with the source line isolator.

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