Electrical transmission cable termination device having short and open-circuit cable test capabilities
First Claim
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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Accused Products
Abstract
A electrical transmission line termination device capable of performing various termination requirements including matching the line impedance of wires in a transmission line with load impedances, electrically connecting conductors in a transmission line for maintaining electrical continuity, detecting improper wiring of the various wires in a transmission line, and connecting a cable shielding conductor to a ground wire.
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Citations
16 Claims
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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:
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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 - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electrical transmission cable termination device insertable into a tap capable of providing an electrical connection to each wire in an electrical transmission cable for terminating said electrical transmission cable, said electrical transmission cable including a pair of data wires, a pair of clock wires, a pair of sense wires, a ground wire, a neutral wire, an AC hot wire, a conductive shield, and having a non-terminated end adapted to be fed by signals from a controller, which controller also includes a circuit breaker, comprising:
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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; electrical connecting means for providing an electrical contact between said pair of sense wires in said transmission channel, said connecting means useable to carry out a continuity check to detect breaks in said sense wires of said transmission cable upon application of a continuity check signal to one of said sense wires; and a cable shield grounding means for connecting said conductive shield to said ground wire. - View Dependent Claims (14, 15, 16)
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Specification