DS200TCDAH1BHE GE

3HAC14890-4 ABB []ABB
3HAC14950-1 ABB
3HAC15029-1 ABB
3HAC15156-1 ABB
3HAC1531-1 ABB
3HAC15377-1 ABB
3HAC15423-3 ABB
3HAC15449-1 ABB
3HAC15518-1 ABB

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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。

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