PLC should be far away from strong interference sources such as electric welding machines,high-power silicon rectifiers and large power equipment,and cannot be installed in the same switch cabinet with high-voltage electrical appliances.The PLC in the cabinet should be kept away from the power line(the distance between the two should be greater than 200mm).Inductive loads installed in the same cabinet as PLC,such as relays with higher power and coils of contactors,should be connected in parallel with RC arc suppression circuits.
PLC应远离强干扰源如电焊机、大功率硅整流装置和大型动力设备,不能与高压电器安装在同一个开关柜内。在柜内PLC应远离动力线(二者之间距离应大于200mm)。与PLC装在同一个柜子内的电感性负载,如功率较大的继电器、接触器的线圈,应并联RC消弧电路。
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