描述
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,通常称为辐射干扰,其分布极为复杂。若PLC系统置于所射频场内,就回收到辐射干扰,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。辐射干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。
NetApp SP-611A Power Supply for FC9
NetApp X267_HKURO500SSX SP-267A-R5 500GB SATA Disk
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NetApp X267A-R5 500GB SATA Disk Drive for DS14MK2AT
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NetApp X267A-R5-C 500GB 7200 RPM SATA A,-C,R SATA
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NetApp X275A 144GB 15K FC DS14MK4 , X275A-R5
NetApp SAS Cable 2 Meters X6558-R6 (Used)