1747-L511模块1747-L511现货

1747-L511
1747-L511
1747-L511

①控制电路没有电压。

②控制线路中的熔断器FU5熔断。

③接触器KM1未吸合，按起动按钮SB2，接触器KM1若不动作，故障必定在控制电路，如按钮SB1、SB2的触头接触不良，接触器线圈断线，就会导致KM1不能通电动作。

当按SB2后，若接触器吸合，但主轴电动机不能起动，故障原因必定在主线路中，可依次检查接触器KM1主触点及三相电动机的接线端子等是否接触良好。

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