Related to control system, What is difference between 4-20
mA active & 4-20 mA pasive signal.
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Answer Posted / janes
4-20mA Active : 2 wire device. same pair of wire is used
for the Power supply and Output 4-20 mA Signal.
4-20mA Pasive : 4 wire Device. Device having external power
supply -110 Vac / 230 Vac / 24 Vdc and generate the 4-20mA.
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