User guide

24of34 MN300282 RevA
ELECTRICAL(cont.) StepSix
AnalogOutput (4/20mA):The analog output of the EchoSwitch®is a sinking4/20 mA controlcircuit.The
typicalwaytousethisfeatureistoconnectapositivesupplytotheMA+inputandtosensethecurrentflow
outoftheMA‐outputwithasamplingresistorasshowninthefollowingdiagram.
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Thecablingshould bea shielded twistedpairto minimizeEMIinterference.Typically 20to24gaugewireis 
usedinthisapplication. TheanalogoutputoftheEchoSwitch®isisolatedfromtheACpowerviaoptocoupler
isolation.
 Note–95to250VACpowerisrequiredtoprovidepowertotheEchoSwitch®forbasicoperation.
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