这些施耐德Schneider开关是通过输入轴带动执行器来监控物体的运动状况，通过电接触块驱动的独立可调节凸轮来确定位置。
常用于在不可能安装标准位置传感器而直接驱动物体运动。
主要应用：
B位置控制运动部件吊装或材料处理设备
（卷扬机，起重机，龙门起重机，起重机，旋转挖掘机等）。
用于抽水系统的B液位控制

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