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Voting node for a distributed control system

  • US 5,796,935 A
  • Filed: 07/20/1995
  • Issued: 08/18/1998
  • Est. Priority Date: 07/20/1995
  • Status: Expired due to Term
First Claim
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1. In a fault tolerant distributed intelligence control system having a plurality of intelligent nodes interconnected by at least one communication media, one of said intelligent nodes comprising:

  • a voter switching circuit comprising;

    a first optically isolated relay having a first and a second output lead;

    a second optically isolated relay having a first and a second output lead;

    a third optically isolated relay having a first and a second output lead;

    a fourth optically isolated relay having a first and a second output lead;

    said first output lead of said first optically isolated relay connected to said first output lead of said third optically isolated relay;

    said second output lead of said first optically isolated relay connected to said first output lead of said second optically isolated relay;

    said second output lead of said third optically isolated relay connected to said first output lead of said fourth optically isolated relay; and

    a diode having a first lead and a second lead, said first lead of said diode connected to said first output lead of said second optically isolated relay and said second lead of said diode connected to said first output lead of said fourth optically isolated relay.

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