Several suppression measures from outside the system are mainly considered.The main contents include:shielding the PLC system and the outer leads to prevent electromagnetic interference from space radiation;isolation and filtering of the outer leads,especially the principle power cables,layered arrangement to prevent the introduction of conducted electromagnetic interference through the outer leads;Location and grounding device,perfect grounding system.In addition,software means must be used to further improve the safety and reliability of the system.
主要考虑来自系统外部的几种抑制措施。主要内容包括:对PLC系统及外引线进行屏蔽,以防空间辐射电磁干扰;对外引线进行隔离、滤波,特别是原理动力电缆,分层布置,以防通过外引线引入传导电磁干扰;正确设计接地点和接地装置,完善接地系统。另外,还必须利用软件手段,进一步提高系统的安全可靠性。
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