Current loop
In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a pair of conductors. Only one current level can be present at any time. A major application of current loops is the industry de facto standard 4–20 mA current loop for process control applications, where they are extensively used to carry signals from process instrumentation to PID controllers, SCADA systems, and programmable logic controllers (PLCs). They are also used to transmit controller outputs to the modulating field devices such as control valves. These loops have the advantages of simplicity and noise immunity, and have a large international user and equipment supplier base. Some 4–20 mA field devices can be powered by the current loop itself, removing the need for
4-20 mA4-20 mA loop4-20 ma4-20mA4-20mA current loopAT&T U-verseAccess controlActive current loopAlarm managementBase stationBombardier Innovia MetroBuilding automationComputer AutomationControl valveCurrent sourceDECwriterDe facto standardDick Smith Super-80 ComputerDifferential signalingDistributed control systemDry loopElectricity meterElectronika BKExplorer/85Fail-safeFieldbusFoundation FieldbusFoundation Fieldbus H1Four to twenty milliampere loopGasoline pumpHazeltine 1500Hazeltine 2000Highway Addressable Remote Transducer ProtocolIEC 62056IFSPIncremental encoderIndustrial control systemInline process refractometerInstrument mechanicInstrumentation
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Current loop
In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a pair of conductors. Only one current level can be present at any time. A major application of current loops is the industry de facto standard 4–20 mA current loop for process control applications, where they are extensively used to carry signals from process instrumentation to PID controllers, SCADA systems, and programmable logic controllers (PLCs). They are also used to transmit controller outputs to the modulating field devices such as control valves. These loops have the advantages of simplicity and noise immunity, and have a large international user and equipment supplier base. Some 4–20 mA field devices can be powered by the current loop itself, removing the need for
has abstract
Eine Stromschnittstelle oder S ...... l der Messstrom bestimmt wird.
@de
In electrical signalling an an ...... principal industrial standard.
@en
La boucle de courant est une m ...... image du signal à transmettre.
@fr
Proudová smyčka je signalizačn ...... na bočníku s nízkou impedancí.
@cs
Струмова петля́ (англ. current ...... ldbus Foundation або PROFIBUS.
@uk
То́ковая петля́ (current loop) ...... етля и цифровая токовая петля.
@ru
電流環是一種類比的電子信号,可以用二條導線進行遠端監控或是控 ...... 取代類比的電流環,但4–20 mA仍然是主要的工業標準之一。
@zh
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Eine Stromschnittstelle oder S ...... kant waren auch Fernschreiber.
@de
In electrical signalling an an ...... itself, removing the need for
@en
La boucle de courant est une m ...... image du signal à transmettre.
@fr
Proudová smyčka je signalizačn ...... na bočníku s nízkou impedancí.
@cs
Струмова петля́ (англ. current ...... ивають електромагнітні завади.
@uk
То́ковая петля́ (current loop) ...... етля и цифровая токовая петля.
@ru
電流環是一種類比的電子信号,可以用二條導線進行遠端監控或是控 ...... 取代類比的電流環,但4–20 mA仍然是主要的工業標準之一。
@zh
label
Boucle de courant
@fr
Current loop
@en
Proudová smyčka
@cs
Stromschnittstelle
@de
Stroomlus
@nl
Струмова петля
@uk
Токовая петля
@ru
電流環
@zh