ABB PPC907BE101 3BHE024577R0101 控制器模块

ABB PPC907BE101 3BHE024577R0101 控制器模块

ABB PPC907BE101 3BHE024577R0101 控制器模块

ABB PPC907BE101 3BHE024577R0101 控制器模块与PLC控制器控制系统连接的各类信号传输线，除了传输有效的各类信息之外，总会有外部干扰信号侵入。

ABB PPC907BE101 3BHE024577R0101 控制器模块此干扰主要有两种途径:一是通过变送器供电电源或共用信号仪表的供电电源串入的电网干扰，这往往被忽视;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控制器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。

ABB PPC907BE101 3BHE024577R0101 控制器模块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。

ABB PPC907BE101 3BHE024577R0101 控制器模块的地线包括系统地、地、交流地和保护地等。接地系统混乱对PLC控制器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，当发生异常状态如雷击时，地线电流将更大。

ABB PPC907BE101 3BHE024577R0101 控制器模块

ABB PPC907BE101 3BHE024577R0101 Controller module and PLC controller control system connected to all kinds of signal transmission lines, in addition to the transmission of effective all kinds of information, there will always be external interference signal intrusion.

ABB PPC907BE101 3BHE024577R0101 Controller module This interference mainly has two ways: one is the power supply through the transmitter power supply or the power supply of the shared signal instrument into the grid interference, which is often ignored; Second, the signal line is interfered by electromagnetic radiation induction in space, that is, the external induction interference on the signal line, which is very serious. The interference introduced by the signal will cause the abnormal work of the I/O signal and the measurement accuracy will be greatly reduced, and the components will be damaged in serious cases. For the system with poor isolation performance, the signals will interfere with each other, causing the bus backflow of the common ground system, resulting in logical data changes, misoperation and crash. PLC controller control system due to signal interference caused by I/O module damage is quite serious, resulting in a lot of system failures.

ABB PPC907BE101 3BHE024577R0101 Controller module grounding is one of the effective means to improve electromagnetic compatibility (EMC) of electronic equipment. The correct grounding can not only affect the electromagnetic interference, but also the equipment can send out interference; The wrong grounding will introduce serious interference signals, so that the PLC system will not work normally.

ABB PPC907BE101 3BHE024577R0101 Ground cables of the controller module include system ground, ground, AC ground, and protection ground. The disturbance of the grounding system to the PLC controller system is mainly the uneven distribution of potential at each ground point, and the ground potential difference between different ground points, which causes the ground loop current and affects the normal operation of the system. For example, the cable layer must be grounded at one point. If A and B at both ends of the cable layer are grounded, there is a ground potential difference, and a current flows through the layer. When an abnormal state occurs, such as lightning strikes, the ground current will be larger.

ABB PPC907BE101 3BHE024577R0101 控制器模块

ABB DSAO120A 3BSE018293R1

ABB LM80.A

ABB PPC905AE101 3BHE014070R0101

ABB PPC907BE101 3BHE024577R0101

ABB UAC383AE01 HIEE300890R0001

ABB UAC389AE02 HIEE300888R0002

ABB DSCA190V 57310001-PK

ABB GFD563A102 3BHE046836R0102

ABB KSD211B 3BHE022455R1101

ABB 5SHY5055L0002 3BHE019719R0101 GVC736BE101

ABB AO2000 LS25

ABB DSMB-01C

ABB UFC762AE101 3BHE006412R0101

ABB XVC767AE105 3BHB007209R0105

ABB PP885 3BSE069276R1

ABB 07KT92 CS31

ABB ABB  5SHY3545L0016  3BHB019719R0101 GVC736BE101 5SXE06-0160

ABB ABB  07KT97 GJR5253000R4270

ABB ABB  07KT98 GJR5253100R4278

ABB ABB  07KT98 H2 GJR5253100R0278

ABB ABB  07KT98C GJR5253100R028

ABB ABB  KUC711AE 3BHB004661R0001

ABB ABB  KUC711AE01 3BHB004661R0001

ABB ABB  KUC711AE101 3BHB004661R0101

ABB ABB  PFTL101A 1.0KN 3BSE004166R1

ABB ABB 5SHX1445H0002 3BHL000387P0101

ABB ABB REF601 CE446BB1NH

ABB CI546 3BSE012545R1

ABB KUC720AE01 3BHB003431R0001 3BHB000652R0001

ABB PFTL101B 5.0KN 3BSE004191R1

ABB PPC380AE01 HIEE300885R0001

ABB TP854 3BSE025349R1

ABB UBC717BE101 3BHE021887R0101

ABB UFC718AE01 HIEE300936R0001

ABB UFC719AE01 3BHB003041R0001 3BHB000272R0001

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