IC694MDL660 GE

Interference introduced from signal lines:In addition to transmitting various types of effective information,there will always be external interference signals in various signal transmission lines connected to the DCS control system.There are two main ways for such interference:one is through transmission This kind of interference is often ignored;the second is that the signal line is interfered by space electromagnetic radiation induction,that is,the external inductive interference on the signal line,this kind of interference is often ignored.It is very serious.The interference introduced by the signal will cause the I/O signal to work abnormally and the measurement accuracy will be greatly reduced.In severe cases,it will cause component damage;for systems with poor isolation performance,it will also lead to mutual interference between signals and cause common ground.The system bus is backflowed,causing logical data changes,malfunctions and crashes.DCS control system due to the introduction of signal interference caused the number of I/O module damage is quite serious,which caused a lot of system failures.

来自信号线引入的干扰：与DCS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，此类干扰主要有两种途径：一是通过变送器供电电源或与电气系统共用信号仪表的供电电源串入的电网干扰，这种干扰往往被忽视；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，这种干扰是很严重的，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。DCS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。

Pfeiffer Kaltkathoden Messröhre IKR060 DN40-KF