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PLC的良好接地是正常运行的前提。在设计时，PLC的接地应与动力设备的接地分开，采用专用接地；如不能分开接地时，应采用共用接地；绝对禁止采用共通接地方法。如图1所示，接地点应尽可能靠近PLC，接地线的线径应大于4mm2，接地电阻一般应小于10Ω。
FANUC A20B-0008-0430 PC BOARD CRTC PUNCHER
FANUC A20B-0008-0461 /04A RES/IND BOARD
New THK GUIDEC RAIL SHS55-C1SSC0+540L
Set of 3 CINCINNATI MILACRON AC OUTPUT 3-531-3839A
