IC200SET001模块IC200SET001模块(4)来自信号线引入的干扰与PLC控制系统连接的各类信号传输线，除了传输有效的各类信号之外，总会有外部干扰信号***。此干扰主要有两种途径：一是通过变送器或共用信号仪表的供电电源串入的电网干扰，这往往被忽略；二是信号线受空间电磁辐射感应的干扰，即信号线上的外部感应干扰，这是很严重的。由信号引入干扰会引起I/O信号工作异常和测量精度大大降低，严重时将引起元器件损伤。对于隔离性能差的系统，还将导致信号间互相干扰，引起共地系统总线回流，造成逻辑数据变化、误动和死机。PLC控制系统因信号引入干扰造成I/O模件损坏数相当严重，由此引起系统故障的情况也很多。（5）来自接地系统混乱时的干扰接地是提高电子设备电磁兼容性（EMC）的有效手段之一。正确的接地，既能电磁干扰的影响，又能设备向外发出干扰；而错误的接地，反而会引入严重的干扰信号，使PLC系统将无法正常工作。PLC控制系统的地线包括系统地、地、交流地和保护地等。接地系统混乱对PLC系统的干扰主要是各个接地点电位分布不均，不同接地点间存在地电位差，引起地环路电流，影响系统正常工作。例如电缆层必须一点接地，如果电缆层两端A、B都接地，就存在地电位差，有电流流过层，当发生异常状态加雷击时，地线电流将更大。此外，层、接地线和大地有可能构成闭合环路，在变化磁场的作用下，层内有会出现感应电流，通过层与芯线之间的耦合，干扰信号回路。若系统地与其它接地处理混乱，所产生的地环流可能在地线上产生不等电位分布，影响PLC内逻辑电路和模拟电路的正常工作。PLC工作的逻辑电压干扰容限较低，逻辑地电位的分布干扰容易影响PLC的逻辑运算和数据存储，造成数据混乱、程序跑飞或死机。模拟地电位的分布将导致测量精度下降，引起对信号测控的严重失真和误动作QUARTECH9800-AC-MN-1-0USPP9800ACMN10TEXASINSTRUMENTSPLC500-5047AUSPP5005047ABOSCHB830-303074NSPPB830303074TexasInstruments5TI-1023PanasonicACServoMotorM***042A1GFreeShipTEXASINSTRUMENTSPLC131547-007USPP131547007FANUCA05B-2351-02NSPPA05B235102XYCOM3300ACTUSPP3300ACTExpeditedshippingailablePanasonicM***022A1AACServoMotorFreeShipGEFANUCIC600LX605NSPPIC600LX605TEXASINSTRUMENTSPLC505-4516NSPP5054516ASEABROWNBOVERIACH401603032A0​BE0000USPPACH401603032A0​B1TEXASINSTRUMENTSPLC2490092USPP2490092TEXASINSTRUMENTSPLC505-3516NSFP5053516ALLENBRADLEY1785-LT2NSFP1785LT2GETTYSM313A-B00-102USPPM313AB00102ASEABROWNBOVERI3HAB-2136-1/7USPP3HAB213617ALLENBRADLEY1326AB-B420H-2​1USPP1326ABB420H21EAGLESIGNALDP9400USPPDP9400LUCENTTECHNOLOGIESD-CI-B2USPPDCIB2GENERALELECTRICDS3800DMPC1F1EUSPPDS3800DMPC1F1ETEXASINSTRUMENTSPLC500-5052USPP5005052TEXASINSTRUMENTSPLC08-35546-000USPP0835546000ELECTROCRAFT9101-2161USPP91012161ASEABROWNBOVERIYB161102-BSUSPPYB161102BSPanasonicServoDriverMSDA453A1AFreeShipTEXASINSTRUMENTSPLC435-CPUUSPP435CPUTexasInstruments520C-1102Series500ControllerA++PanasonicACServoMotorM***02A1EFreeShipSIEMENSTI505-4908PLCNEWASEABROWNBOVERI29118337BUSPP29118337BSIEMENSTIPLCOUTPUTBOARD6ES5-453-7LA116ES54537LA11PanasonicACServoDriverDriverMSD043A1XXEFreeShip(AG01)PANASONICMQMZ022A1FACSERVOMOTORABLEVRKF-15C-200-ZWORKINGASEABROWNBOVERI57411490USPP57411490PERCEPTRONDROPTERMINATOR3100790ATLASCOPCO1051-01USPP105101PanasonicACServoMotorM***012A1EEFreeShipASEABROWNBOVERIDSQC-115USPPDSQC115PanasonicACServoMotorMHMD082P1UPanasonic/NaisServoDriverMCDHT3520NIB!OnePanasonicACServoDriverDV85018HA502PanasonicServoDriveMADR04311ANewinBoxFreeShipALLENBRADLEY1771-M1NSPP1771M1TEXASINSTRUMENTSPLC505-ATM-0440USPP505ATM0440TEXASINSTRUMENTS5TI-1034-2SEQUENCERMODULE***XLNT***MITSUBISHIFR-A540-3.7K-N​AUSPPFRA54037KNAASEABROWNBOVERISI4662708TUSPPSI4662708TSIEB&MEYER26.39.67USPP263967ASEABROWNBOVERI8R37-1041-31-3​101USPP8R371041313101KTRON9191-700810USPP9191700810ACCUSORT22NSPP22PanasonicACServoDriverDriverMSD043A1XXVFreeShipPanasonic2.5kWACServoDriverMSD253A1VKFreeShipTexasInstruments500-5056OutputModule20-132V!WOW!TEXASINSTRUMENTSPLC500-5021NSFP5005021SIEMENSA1-106-101-509USPPA1106101509NewPerceptron926-0127RepeaterAssembly46-650-1229EnclosureTexasInstrument560-2128PanasonicACServoMotorM***022ASBFreeShipPanasonicServoDriverMCDHT3520ENewinBoxFreeShipExpeditedshippingailableTEXASINSTRUMENTSPLC505-2571NSFP5052571ASEABROWNBOVERIACS6010095000B​1200000USPPACS6010095000B​12TERAOKATPB-1770-2USPPTPB17702Perceptron495-0294ReplacementCircuitBoardPANASONICACSERVODRIVEADKF50B5AN60W,80WPanasonicMSD083A1XKACServoDriverTEXASINSTRUMENTS500-4010**ASEABROWNBOVERI68463815-PFNFP68463815PALLENBRADLEY1336F-BRF10-AA​-EN-HAS2-L9EUSPP1336FBRF10AAEN​HA)