abbr. LS
misc. limit switch
小型极限开关适配器可以安装。
极限开关：吊上吊下都有极限开关部件，防止链条超出确保安全。
Limit switch: using limit switch component in designation to protect chain and ensure and security.
有极限信号而没有上或下强减速信号，无法判定上或下极限信号； 上或下极限开关未接或开关故障；
Has utmost signal and has no up or down chiang slow down signal, lawlessness adjudgment up or lower pole limit signal ;
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