首先比较重要的是静电的隔离。静电是无形的杀手，但可能因为不会对人造成生命危险，所以许多人常常忽视它。在中国的北方、干燥的场所，人体身上的静电都是造成静电损坏电子组件的因素。虽然你被静电打到的话，只不过是轻微的酥麻，但这对PLC和其它任何电子器件就足以致命了。要避免静电的冲击有下列三种方式：在进行维修或更换组件时，请先碰触接地的金属，以去除身上的静电；不要碰触电路板上的接头或是IC接脚；电子组件不使用时，请用有隔离静电的包装物，将组件放置在里面。想象PLC里的元器件是一个娇嫩的婴儿，而那些静电会导致这个婴儿死亡，你就会更容易以正确的态度对待这个问题了。
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插入卸下的CPU模块和填充模块
