1783-SFP1GSX1783-SFP1GSX1783-SFP1GSX1)由于PLC是通过输入电路接受开关量、模拟量等输入信号，因此输入电路的元器件质量的好坏和连接方式直接影响着控制系统的可靠性。比如：按钮、行程开关等输入开关量的触点接触是否良好、接线是否牢固等。设备上的机械限位开关是比较容易产生故障的元件。在设计时，应尽量选用可靠性高的接近开关代替机械限位开关。此外，按钮的常开和常闭触点的选择也会影响到系统的可靠性。现以一个简单的起动、停止控制线路为例，如图2和图3所示的是两个控制线路和它们的对应梯形图。这两个控制线路的控制功能完全一样，按下起动按钮，输出动作；按下停止按钮，输出断开；但它们的可靠性不一样。我们假设输出断开为安全状态，那么图3的可靠性要比图2的高。这是因为SB1、SB2都有发生故障的可能，而***常见的现象是输入电路开路。当采用图3电路时，不论SB1、SB2开关本身开路还是接线开路，输出都为安全状态，保证了系统的安全和可靠。【***】【诚信】【创新】【合作】【共赢】厦门泰尼电气有限公司【产品质量】原装进口***【检测标准】按原厂标准【产品质保】1年【快递时间】24小时到【联系我们】＆业务经理：小黄＆洽谈电话：0592-6809319/18950191386＆商务***：2917675397＆传真（FAX)：0592-6890859（请注明，01006收）＆公司全称：厦门泰尼电气有限公司＆公司地址：厦门市海沧区海沧街道滨湖一里1号楼Giddings&LewisACInputFaceplate502-03212-00Giddings&LewisPICO-PS05PiC0PowerSupply**LNC**Expeditedshipping***ailableGiddingsandLewis502-03178-00I/OJumperBoardGiddings&LewisOutputModule,502-03549-00R3WARRANTYOne-dayshipping***ailableGiddingsLewisParts330THorizBoringMillingManualOne-dayshipping***ailableGiddings&LewisSRPCBoard502-03016-00One-dayshipping***ailableGIDDINGS&LEWIS501-03273-01CR.REF.TIMEMODULE(595Setof8Giddings&Lewis220-5612-002JawsGIDDINGS&LEWISM.1302.8619NSFPM13028619Giddings&LewisSerialCommInterface502-03266-00502-02998-22GIDDINGS&LEWIS2KCMOS-1YEARWARRANTYOne-dayshipping***ailableGIDDINGS&LEWIS502-02960-01ACOutputModuleExpeditedshipping***ailableGIDDINGS&LEWISM.1016.9581USPPM10169581GIDDINGS&LEWIS502-02552-00USPP5020255200GIDDINGS&LEWIS502-02954-00USPP5020295400Giddings&LewisDCInputBoard502-02-814-16502-02972-16GIDDINGS&LEWISDCINPUT-1YEARWARANTYOne-dayshipping***ailableGiddings&LewisSSTPCICardMMC-PC-AnalogProfibusExpeditedshipping***ailableGiddingsLewis502-02844-01ServoInterfaceDiagnostic501-03438-00P#502-02959-00GIDDINGS&LEWISACINPUTBDExpeditedshipping***ailableGiddings&LewisG&LDCOutputInterface502-02954-01GIDDINGS&LEWISDYNAMICSHUNTSR100401-34308-00NIBGiddings&LewisPushbuttonC***ole501-02998-00Giddings&LewisDigitizingModule502-02822-00Giddings&LewisOperatingManualforGemini-DControlGiddings&LewisControlMaintenManualMM200/600,MM800Giddings&LewisControlOperatingManualforGemini-DGiddings&LewisControlMainten.ManualMM200/600,MM800GIDDINGS&LEWIS502-02825-00TRIACMOTHERBOARDNEWNIPGiddings&LewisControlBoard58002986NIBEK-965GIDDINGS&LEWISM221LSHEFFIELDMEASURMENTLOTEK-153GIDDINGS&LEWISSHEFFIELDMEASUREMENTLOTOF2GIDDINGS&LEWISOUTPUT24VDCSOURCE503-25908-01R1GIDDINGS&LEWIS502-02824-00PCBOARD/1YEARWARRANTYGIDDINGS&LEWIS502-02868-00PCBOARD/1YEARWARRANTYGIDDINGS&LEWIS502-02869-20NSPP5020286920Giddings&LewisRS232Interface502-02833-20-DI-GIDDINGS&LEWIS502-03214-00NSPP5020321400Giddings&Lewis502-02080-00DECADECounter-UsedGiddings&LewisPICO/PiC0CPUw/5SlotRack**LNC**Expeditedshipping***ailable(2)Giddings&Lewis502-02814-08CircuitBoardModuleG&LCNC8000GiddingsLewis8000BServiceManualExpeditedshipping***ailableGiddings&LewisInputModule,502-03550-00R2,WARRANTYOne-dayshipping***ailableGiddings&LewisInputModule,502-03550-02R0,WARRANTYOne-dayshipping***ailableGiddings&LewisInputModule,502-03548-00R2,WARRANTYOne-dayshipping***ailableGiddings&LewisInputModule,502-03550-00R1,WARRANTYOne-dayshipping***ailableGIDDINGS&LEWIS501-04218-00USPP5010421800GIDDINGS&LEWIS502-03700-10USPP5020370010G&LGiddingsLewisCNC800B&MControlSystemManualExpeditedshipping***ailableGiddings&LewisACInputBoard502-02959-00One-dayshipping***ailableGiddings&LewisTTLInterfaceBoard572-02869-00One-dayshipping***ailableGIDDINGS&LEWIS502-02869-20USPP5020286920GIDDINGS&LEWIS502-02460-00USPP5020246000GIDDINGS&LEWIS502-02461-00USPP5020246100G&LGiddingsLewisNumeriPath800-LManual532533535GIDDINGS&LEWISM.1016.9125NSFPM10169125Giddings&Lewis502-02621-06ServoResistorBoardGiddingsLewisInstructionPartsRadialDrillManualOne-dayshipping***ailable)