TP4-537A024M,直銷(xiāo)安士能開(kāi)關(guān)
在這種情況下，一個(gè)三階段啟用開(kāi)關(guān)是更好，是特別
在要求許多C標(biāo)準(zhǔn)。此開(kāi)關(guān)有三個(gè)開(kāi)關(guān)位置
OFF-ON-OFF）和，如果操作者握緊開(kāi)關(guān)，它是致動(dòng)
出允許位置（中間位置）和機(jī)被關(guān)閉
如果使用2級(jí)的按鈕，它也必須確保的是，在一個(gè)
緊急情況下，操作者是在一個(gè)位置，以激活緊急停止
enabling device and keeps it in the actuated position. The movement is
stopped again when the switch is released. This two-stage function (OFFON)
is provided by all pushbuttons and all three-stage enabling switches.
However, experience shows that the operator often clenches the enabling
device in an emergency.
In this case a three-stage enabling switch is better and is specifically
requested in many C standards. This switch has three switch positions
OFF-ON-OFF) and, if the operator clenches the switch, it is actuated
然如在圖中可以清楚地看出，啟用功能只能是
階段2實(shí)現(xiàn)這個(gè)功能是通過(guò)的閉幕提供
常開(kāi)觸點(diǎn)（NO= E1和E2）。
如果按鈕被釋放，也就是從第2階段恢復(fù)階段1，
常開(kāi)觸點(diǎn)再次打開(kāi)。 2級(jí)的按鈕和
3階段啟用開(kāi)關(guān)在這個(gè)功能相同。
如果，在這個(gè)例子中，3級(jí)啟用開(kāi)關(guān)的按鈕被壓而
TP4-537A024M,直銷(xiāo)安士能開(kāi)關(guān)
