聯(lián)系人；羅林烽
電話；15080036302
QQ；1741511549
限位開關就是用以限定機械設備的運動極限位置的電氣開關。限位開關有接觸式的和非接觸式的。接觸式的比較直觀，機械設備的運動部件上，安裝上行程開關，與其相對運動的固定點上安裝極限位置的擋塊，或者是相反安裝位置。當行程開關的機械觸頭碰上擋塊時，切斷了（或改變了）控制電路，機械就停止運行或改變運行。由于機械的慣性運動，這種行程開關有一定的“超行程”以保護開關不受損壞。非接觸式的形式很多，常見的有干簧管、光電式、感應式等，這幾種形式在電梯中都能夠見到。當然還有更多的先進形式。
限位開關是一種常用的小電流主令電器。利用生產機械運動部件的碰撞使其觸頭動作來實現(xiàn)接通或分斷控制電路，達到一定的控制目的。通常，這類開關被用來限制機械運動的位置或行程，使運動機械按一定位置或行程自動停止、反向運動、變速運動或自動往返運動等。
在電氣控制系統(tǒng)中，限位開關的作用是實現(xiàn)順序控制、定位控制和位置狀態(tài)的檢測。用于控制機械設備的行程及限位保護。構造：由操作頭、觸點系統(tǒng)和外殼組成。
在實際生產中，將限位開關安裝在預先安排的位置，當裝于生產機械運動部件上的模塊撞擊行程開關時，限位開關的觸點動作，實現(xiàn)電路的切換。因此，行程開關是一種根據運動部件的行程位置而切換電路的電器，它的作用原理與按鈕類似。
限位開關廣泛用于各類機床和起重機械，用以控制其行程、進行終端限位保護。在電梯的控制電路中，還利用行程開關來控制開關轎門的速度、自動開關門的限位，轎廂的上、下限位保護
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CUTLER HAMMER E51CNC1 NSFP E51CNC1
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Cutler Hammer E51CLP1
CUTLER HAMMER E51CLP1 PHOTOELECTRIC SENSOR
CUTLER HAMMER E51-CLP1 NSFP E51CLP1
CUTLER HAMMER E51CLF3 PHOTOELECTRIC SENSOR DARK
CUTLER HAMMER E51CLF3 PHOTOELECTRIC SENSOR DARK
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CUTLER HAMMER E51BLT5 PROXIMITY SWITCH SENSOR LIMIT
CUTLER HAMMER E51BLT1 PROXIMITY SENSOR INDUCTIVE NO OR NC E51 E51L
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Cutler Hammer E51ALT1
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Cutler Hammer E51ALP1
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CUTLER HAMMER E50TD1 LIMIT SWITCH
Cutler Hammer E50SN E50DN1 Limit Switch
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Cutler Hammer E50
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Cutler Hammer E50DS1 Pack of 6 Limit Switch Head Ser A1 - No Box
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Cutler Hammer E50BT3 Limit Switch With Roller
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Cutler Hammer E50AT5 Limit Switch
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Cutler Hammer E50AT3 Limit Switch Series A2 600V Eaton E50RA20 A1
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CUTLER HAMMER E50AS3 NSFP E50AS3
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Cutler Hammer E50ANT3 Limit Switch With Roller
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CUTLER HAMMER E34-N2 NSFP E34N2
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CUTLER HAMMER E34GDB97LRD2A-?1X NSFP E34GDB97LRD2A1
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CUTLER HAMMER E30-KP11 NSFP E30KP11
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Cutler Hammer E30JN Pushbutton Operator E30-JN
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CUTLER HAMMER E30JF USPP E30JF
CUTLER HAMMER E30-JA USPP E30JA
