技术参数 | |
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品牌 | |
型号 | XVME-203/293 |
ThefunctionoftheINPUTinterfacecircuitofPLCistoinputthesignalsgeneratedbybuttons,travelswitchesorsensorsintotheCPU;ThefunctionofTHEOUTPUTinterfacecircuitofPLCistoconverttheCPUoutputsignalintothesignalthatcandrivetheexternalexecutivecomponent,inordertocontrolthecontactorcoilandotherelectricalapplianceson,off.TheINPUTandoutputinterfacecircuitofPLCgenerallyadoptsopticalcouplingisolationtechnology,whichcaneffectivelyprotecttheinternalcircuit.
Inputinterfacecircuit
TheINPUTinterfacecircuitofPLCcanbedividedintoDCinputcircuitandACinputcircuit.ThedelaytimeofDCinputcircuitisrelativelyshort,itcanbedirectlyconnectedwithproximityswitch,photoelectricswitchandotherelectronicinputdevices;Acinputcircuitissuitableforuseinharshenvironmentswithoilmistanddust.
TheACinputcircuitissimilartotheDCinputcircuit.Theexternalinputpowersupplyischangedto220VACpowersupply.
Outputinterfacecircuit
Thereareusuallythreetypesofoutputinterfacecircuits:relayoutput,transistoroutputandthyristoroutput.
Relayoutput,transistoroutput,andthyristoroutputaresimilartooutputcircuits,exceptthattransistorsorthyristorscontroltheexternalloadinsteadofrelays.