thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun hkseries 2013.10.09-a/3 page1of4 features l appliedtothelooptotakepoweroccasion l highefficiency,lowpowerconsumption l 1000vdcisolation l excellenttemperatureperformance l naturalaircooled l industrialstandardpin-out l anti-flamingpackaging,ul94-v0compliant application hkseriesofproductsaremainlyusedinapplicationsoftwo-wire signalandharttransmission,tosolveaseriesofproblemsdueto thegroundpotentialdifferenceduringthetransmissionapplication ofthemcausedbydifferentgroundloops,suchas,thesignal transmissionerrorsaround4~20ma,followedbytheinterruptionof hartcommunicationordamagetoequipmentportdevice.hk seriesadoptstheloopwaytotakepower,andcompensates transmissionerrorscausedbyelectricpotentialdifference,soasto ensuretheaccuracyofthecommunicationtransmission. hk series singleoutput,speciallydesigned forapplicationofintelligent passivetransmitter patentprotected rohs partnumbersystem HK3S03B package style output voltage input voltage product series selectionguide modelnumber inputvoltage (vdc) outputvoltage (vdc) outputcurrent (ma) inputcurrent (ma)(typ.) reflection ripplecurrent (ma,typ.) max.capacitor load( f) nominal @max.load @noload *HK3S03B 3.3 3.3 3.0 4-20 1 15 10 hk5s03b 5 3.3 3.2 4-20 1 15 10 hk5s05b 5 5 2.0 4-20 1 15 10 hk5s03bv 5 3.3 3.0 3.5-22 1 15 10 hk8s03b 7.5 3.3 3.5 4-20 1 15 10 hk8sx3b 7.5 3 5.0 4-20 1 15 10 hk8s05ib 7.5 5 3.5 4-20 1 15 10 *designing inputspecifications item testconditions min. typ. max. unit inputsurgevoltage(1sec.max.) 3.3vdcinput -0.7 -- 5 vdc 5vdcinput -0.7 -- 9 7.5vdcinput -0.7 -- 18 inputfilter capacitancefilter output specifications item testconditions min. typ. max. unit lineregulation forvinchangeof 1% hk8s05ib -- -- 0.25 % others -- -- 1.2 loadregulation 10%to100%load 3vdcoutput -- 15 -- 3.3vdcoutput -- 15 -- hk5s05b -- 12 -- hk8s05ib -- -- 1.5 temperaturedrift 100%load -- -- 0.03 %/ c
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun hkseries 2013.10.09-a/3 page2of4 common specifications item testconditions min. typ. max. unit isolationvoltage input-output,testedfor1minuteandleakage currentlessthan1ma 1000 -- -- vdc isolationresistance input-output,testat500vdc 1000 -- -- m switchingfrequency 100%load,inputvoltagerange -- 100 300 khz mtbf mil-hdfk-217f@25 3500 -- -- khours casematerial plastic(ul94-v0) weight hk5s03bv -- 2.9 -- g others -- 2.1 -- environmental specifications item testconditions min. typ. max. unit item noncondensing -- -- 95 % storagehumidity -40 -- 85 c operatingtemperature -50 -- 125 storagetemperature ta=25 c -- 25 -- temp.riseatfullload 1.5mmfromcasefor10seconds -- -- 300 leadtemperature freeairconvection product typical curve 120 100 80 60 40 20 0 -40 0 40 85 105 120 o u t p u t p o w e r p e r c e n t ( % ) ambient temp.() temperature derating curve safe operating area (figure1) dimensions,recommendedfootprint&packaging (figure2)
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun hkseries 2013.10.09-a/3 page3of4 (figure3) note: 1.figure2appliestohk5s03b hk5s05b hk8s03b hk8sx3b hk8s05ib HK3S03B 2.figure3appliestohk5s03bv. testconfigurations inputreflected-ripplecurrenttestsetup inputreflected-ripplecurrentismeasuredwithaninductorlinandcapacitorcintosimulatesourceimpedance. dc cin lin dc load oscilloscope current probe lin(4.7 h) cin(220 f,esr<1.0 at100khz) designreference groundloopprobleminsignaltransmissionandgroundelectricpotentialdifference therearemanyreasonscausinggroundloopproblemininstrumentcircuit.whenthesignaltransmissionandreceivingdevicesconnectedtoa differentlocationorofdifferentpowersupplies,itwillleadtogroundloop,anditiscommoninlongcabletransmission.mostofthereasonisthat theequipmentofthemetalshellhadphysicalcontactwiththeground.groundloopproduceselectriccircuit,andformerrorsources. becausetheaccuracyofthesignalcannotbemeasuredthroughsimpleobservationinthereceivingendofthesignal.thelandcirculationfor differentgroundpotentialwillbringerrorthatcan'tbedetectedtosignalloop.thereisalsoasignalerrorproblemcausedbygroundloopinthe absenceoftwo-wiresignalisolationtransmission.signalslikelightningsignalandsurgesignalwillloadonthesignallinealongwithlongwire, anddamagemodulationanddetectiondevicesontheport.inanothercase,twocomponentsofthedifferentpotentialportmayleadtotheport voltageexceeding,anddamagethedeviceportsubsequently. signaltransmissionmodeofnon-isolatedtwo-wiresystem transducer adc mcu 3.3v 2.5v hart modulator voltage regulstor currentloop dac two wire instrument 4-20 ma 24v r l plc (figure4)
thecopyrightandauthorityfortheinterpretationoftheproductsarereservedby mornsun hkseries 2013.10.09-a/3 page4of4 note: 1.operationunderminimumloadwillnotdamagetheconverter;however,theymaynotmeetallspecifications. 2.max.capacitiveloadistestedatnominalinputvoltageandfullload. 3.unlessotherwisenoted,allspecificationsaremeasuredatta=25 c,humidity<75%,nominalinputvoltageandratedoutputload. 4.inthisdatasheet,alltestmethodsarebasedonourcorporatestandards. 5.allcharacteristicsareforlistedmodels,andnon-standardmodelsmayperformdifferently.pleasecontactourtechnicalsupportformoredetail. 6.pleasecontactourtechnicalsupportforanyspecificrequirement. 7.specificationsofthisproductaresubjecttochangeswithoutpriornotice. mornsunscience&technologyco.,ltd. address:no.5,kehuist.1,kehuidevelopmentcenter,scienceave.,guangzhousciencecity,luogangdistrict,guangzhou,p.r.china. tel:86-20-38601850 fax:86-20-38601272 e-mail: info@mornsun.cn http://www.mornsun-power.com inthecircuitoffigure4, sensorsignalisconvertedintodigitalsignalsthroughtheadc,thensenttothecurrentloopdacandhart modulatorthroughmcu,form4~20masignaloutput.currentloopdactakeselectricityfromtheplcbusofoutput4~20ma,output3.3vand 2.5vthroughthebuilt-involtageregulator,supplyasmallamountofpowerformcuandhartmodulator. inthetransmissionoffigure4,therearegroundelectricpotentialdifferencesbetweentwo-wiresysteminstrumentandplconthefarside, introducingthecommonmodeinterference.thedisturbancecausesthetransmissionerrorof4~20ma,andaffectsthenormalcommunication hartbus.ifthecommonmodeinterferenceistoolarge(overthevoltagerangeofthecomponentsinthecommon-mode),itmaycausedamage intheinternalinstrumentoftwowiredevices. signaltransmissionmodeofisolatedtwo-wiresystem (figure5) duetothepotentialrisksbasedonthedifferentground,youcanisolatethemcuandthecurrentloopdacandhartmodulatorbydigital isolation.currentloopdacandhartmodulatorisfloatingform.theymakethehighimpedanceformedtotwogroundpotentialbetweentwo- wireinstrumentandplcsystem,reducetheloopcurrentbetweenthegroundwire,andelectricalisolationbetweentwodevices,soastoeliminate thehiddentroubleofcommonmodeinterference. thetwo-wireinstrumentgoeswithoutadditionalpowersupplyport.thepowersupplytakespowerthroughthe4-20maloop.aftertheisolation mode,2.5vpowerofhartmodulatorisstillformedfromthebuilt-involtageregulatorofloopdacregulator,butthepowersupplyforthe3.3v mcusystemisadifficultproblem.abettersolutionistoconnectwithavoltagestabilizingdiodeinthe4-20macircuitasshowninfigure5.then youcanusehkmoduleofmornsuntoisolatedandoutput3.3vpowertothemcupowersystem.usingthehkmoduleanddigitalisolation circuitmadebymornsun,youcanrealizetheelectricalisolationoftwo-wireinstrumentandplcsystem.itavoidsthemeasuringerrorofthe systemanddamagingequipmentcausedbygroundpotential,anditfurtherenhancesthereliabilityofthesystem. transducer adc mcu 3.3v 2.5v hart modulator voltage regulstor currentloop dac two wire instrument 4-20 ma 24v r l plc digital isolation h k d
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