four-wire circuit

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four-wire circuit

[′fȯr ‚wīr ′sər·kət]
(communications)
A two-way circuit using two paths so arranged that communication currents are transmitted in one direction only on one path, and in the opposite direction on the other path; the transmission path may or may not employ four wires.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The representation of energy processes by three independent (and not four dependent) curve vector-valued functions with values in the arithmetic 3-dimensional space [X.sup.(3)] is adequate both for 4-wire, and for 3-wire circuits.
The ship's port side had dropped five degrees at the moment I taxied between the 3- and 4-wires. The normal maximum list the ship wants is two degrees when taxiing jets.
Serial ATA: 4-Wire Cable With Support for Optional Shield/Drain Wires
A third version is available for use with GL's Analog Test Set which provides a pair of analog two-wire interfaces (RJ-11) and optional 4-wire cellular phone interfaces for assessing voice quality on analog and wireless systems.
With the FP-RTD-PT100-3 and FP-RTDPTl00-4 dual-channel input modules, users can integrate low-channel counts of RTD (resistance temperature detector) into their industrial monitoring systems with the 2-,3-, or 4-wire RTD sensor that best suits their application requirements, NI says.
ITT Federal currently uses 2-Wire FXO cards, 2-Wire FXS cards, and 4-Wire E&M cards, depending on what type of voice circuit is being used.
It will ship TouchTek4, a 4-wire resistive touch-input technology later this year, to break into this market, which has so far been dominated by smaller operations such as Nissha, Gunze and Dynapro.
Using V.fast technology, Allegro operates at speeds up to 115.2Kbps on asynchronous connections and 2- and 4-wire leased lines.
* PT460 amplified-output pressure transducer for long-distance transmission without noise interference; easier interface with PLCs or computer-based extruder control systems and 4-20 mA, 2-wire; 0-5 VDC, 4-wire; 1-6 VDC, 3-wire; 0-10 VDC, 4-wire; or 1-11 VDC, 3-wire outputs.
The tool connects to the design engineer's computer using a USB 2.0 interface and can be connected to the target via an 8-pin single inline header that supports interfaces such as 4-wire JTAG and serial wire debug with streaming data gateway.
A 3-wire circuit is a special case of the 4-wire circuit.