电感式接近开关工作原理Workingprincipleofinductiveproximityswitch目标LC震荡器开关级放大输出级ObjectLCoscillatorswitchingstagemagnifiedoutputstage电感式接近开关由三大部分组成：振荡器、开关电路及放大输出电路。振荡器产生一个变交磁场，并达到感应距离时，在金属目标内产生涡流，从而导致振荡衰减，以至停振。振荡器振荡及停振的变化被后级放大电路处理并转换成开关信号，触发驱动控制器件，从而达到非接触式之检测目的。目标离传感器越近，线圈内的阻尼就越大，阻尼越大，传感器振荡器的电流越小。Inductiveproximityswitchiscomposedofthreeparts:oscillator,switchcircuitandmagnifiedoutputcircuit.Theoscillatorwillgenerateanalternatingelectricfield.Whenthemetalobjectapproachesthiselectricfieldandreachestheinductiondistance,whirlpoolwillgenerateinmetalobject,resultinginattenuationofvibrationandthenstop.Thechangeofvibrationandstopofoscillatoristreatedbybehindstagemagnifiedcircuitandconvertedtoswitchingsign,triggeringdrivingcontrolfornon-contactdetection.温州施多德电气有限公司Tel:057767394811Fax:673000507Http://www.estord.com-1-接近开关型号说明ModelexplanationofproximityswitchLM18–3005NA□1234567编号构成代码及含义CodeanddefinitionNocomposition开关类别LM：电感式CM：电容式SM：霍尔式1SwitchcategoryAM：安全防爆式XM：模拟线性式HM：舌簧式2外形代号□：圆柱型□：角柱型及平面安装型Outwardappearancecode30：6-36VDC310：5-24DVC320：12-60VDC3工作电压20：90-250VAC210：24-250VAC220：380VACWorkingvoltage40：12-240VDC/24-240AC50：特殊电压：Specialvoltage4检测距离01:1mm05:5mm10:10mmDetectiondistance输出形式N:三线直流NPN负逻辑输出5OutputformP:三线直流PNP正逻辑输出L:二线直流输出□：交流二线输出W:交流三线输出ACtherr-wireoutputJ:继电器触点输出RelaycontactoutputNP:NPN+PNP双输出NPN+PNPdoubleoutput输出状态A:常开(NO)Normallyopen(NO)B:常闭NC)Normallyclose(NC)6OutputstateC:一开一闭(NO+NC)normallyopen+normallyclose(NO+NC)MU:模拟电压MimicvoltageMI模拟电流Mimicecurrent附属功能T:带航空插座withaviationconnectorY:防水，防油waterproof,oilproof7SubsidiaryfunctionsI:特殊要求specialrequirementH:耐高温hightempresistaneR:环型ringtype■主要特征■Mainfeatures◆体积小◆Compactvolume◆重复定位精度高◆Highprecisionofrepeatedlocation◆外形结构多样◆Diversifiedexterior◆抗干扰性能好◆Goodperformanceofanti-interference◆输出形式多◆Manyoutputforms◆开关频率高◆Highon-offfrequency◆电压范围宽◆Widevoltagerange◆防尘、防震、防水、防油◆Dustproof,vibrationproof,waterproofandoilproof◆具备短路保护，反击接保护◆Withshort-circuitprotect