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4-20 mA |
Also found in: Wikipedia | 0.01 sec. |
4-20 mA(4 to 20 MilliAmp) A point-to-point or multi-drop circuit mainly used in the process automation field to transmit signals from instruments and sensors in the field to a controller. It sends an analog signal from 4 to 20 mA that represents 0 to 100% of some process variable. As a current loop signal, 4-20 mA also powers the sensor transmitter on the same wire pair, and 4-20mA provides more resistance to interference than a voltage-based line. See HART. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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Millivolt, voltage, and 4-20 mA outputs available on
standard products. The two-wire
design utilizes 24 Vdc power with 4-20 mA output and is used as a direct
interface with existing control and data acquisition systems. Onset offers
more than 60 models of data loggers to measure temperature, humidity,
light, AC current, carbon monoxide, 4-20 mA, voltage, on/off,
open/closed, and events. |
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