Delphin ProfiMessage - 4.6.3.3 Sensor type current

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ProfiMessage

Connection

Indicateherehowthesensorhasbeenconnected(thediagramdisplaystheselec-

tedwiring):

2 Wire:Thesensorisconnectedwithonlytwowires.Thisisrecommendedonly

forveryshortlinesandhighimpedancesensorsotherwisetheresultingvoltage

dropacrossthecircuitscanleadtomeasurementerrors.Alternatively,asensor

canbeusedwiththreeconnections,wheremeasurementtakesplacewithoutline

compensation.

4 Wire:Therecommendedconnectionmethodforlowimpedancesensorsand/or

longersupplylines.Thelossoffeedlinesdoesnotmatterbecausethedevicehasa

high-ohminputresistance(novoltagedroponthelinefeed)andthevoltagedrop

(themeasurementvalue)canbemeasureddirectlyatthesensor.

4.6.3.3 Sensortypecurrent

Mode

unipolar:Measuringonlypositivecurrents.

bipolar:Measuringpositiveand/ornegativecurrents.

Measuring range

Selectameasuringrangethatisequaltoorgreaterthanthecurrentattheloadres-

istortopreventA/Dconverteroverload.Thechannelreceivesthestatus‘Meas-

Delphin Technology AG

Dezember 2015

ProfiMessage Manual