系列90-30 PLC装置接地装置接地的建议和程序见下表.接地程序必须完全遵循系列90-30PLC系统安全和正确操作基板安全接地提供如下建议,但是用户区域应用安全标准或装置类型同样也需要考虑基板的金属背板必须使用单独的接地线接地.基板安装螺丝不用考虑本身的接地连接.使用小AWG #12 (3.3 mm2)金属线,在基板两个底部安装孔中的顶端下面配有环型端子和星型锁扣垫圈。
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