IC694MDL754 GE

Interference from the chaos of the grounding system:Grounding is one of the effective means to improve the electromagnetic compatibility(EMC)of electronic equipment.Correct grounding can not only inhibit the influence of electromagnetic interference,but also inhibit the equipment from emitting external interference;while wrong grounding,but will introduce serious interference signals,so that the DCS system will not work properly.The ground wire of DCS control system includes:system ground,shield ground,AC ground and protection ground,etc.The disturbance of the grounding system to the DCS system is mainly due to the uneven potential distribution of each grounding point and the ground potential difference between different grounding points,which causes grounding loop current and affects the normal operation of the system.

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，既能抑制电磁干扰的影响，又能抑制设备向外发出干扰；而错误的接地，反而会引入严重的干扰信号，使DCS系统将无法正常工作。DCS控制系统的地线包括：系统地、屏蔽地、交流地和保护地等。接地系统混乱对DCS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，引起接地环路电流，影响系统正常工作。