1794-AENT
1794-AENT
1794-AENT
2.2 PLC 控制系统中电磁干扰的主要来源
2.2.1 来自空间的辐***干扰
空间的辐射电磁场（ EMI ）主要是由电力网络、电气设备的暂态过程、雷电、无线电广播、电视、雷达、高频感应加热设备等产生的，通常称为辐***扰，其分布极为复杂。若 PLC 系统置于所射频场内，就回收到辐***扰，其影响主要通过两条路径：一是直接对 PLC 内部的辐射，由电路感应产生干扰；而是对 PLC 通信内网络的辐射，由通信线路的感应引入干扰。辐***扰与现场设备布置及设备所产生的电磁场大小，特别是频率有关，一般通过设置屏蔽电缆和 PLC 局部屏蔽及高压泄放元件进行保护。
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厦门泰尼电气有限公司
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厦门泰尼电气有限公司（ Xiamen Thani Electric Co.,Ltd）***控制系统零部件解决方案。本着<<***>><< 诚信>><<创新>><<合作>><<共赢>>的经营理念
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Amray 3800L Scanning Electron Microscope SEM 904
Brand New Feeler 3.5 t*** DIESEL
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VARIAN TURBO-V 70 With Varian controller
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