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Electrical transmission cable termination device having short and open-circuit cable test capabilities

  • US 5,185,580 A
  • Filed: 09/04/1991
  • Issued: 02/09/1993
  • Est. Priority Date: 09/04/1991
  • Status: Expired due to Fees
First Claim
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1. An electrical transmission cable termination device for terminating an electrical transmission cable, said electrical transmission cable including a pair of data wires, a pair of clock wires, a pair of sense wires, a metallic foil shield, a ground wire, a neutral wire, an AC-hot wire, and having a non-terminated end adapted to be fed by signals from a controller, which controller also includes a circuit breaker, comprising:

  • an impedance matching means for providing load impedances substantially respectively matching a line impedance of said pair of data wires and said pair of clock wires in said transmission cable;

    a short circuit detecting means for detecting faulty wiring of said transmission cable, said short circuit detecting means including a load between various wires which transmit electrical signals in said transmission cable and said ground wire, said load creating a circuit breaker triggering current in said circuit breaker of said controller should a faulty wiring condition exist; and

    an electrical connecting means for providing an electrical contact between said pair of sense wires in said transmission cable, said connecting means usable to carry out a continuity check to detect breaks in said sense wires of said transmission cable upon application of a continuity check signal from said controller to one of said

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