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VT3□□系列直流（DC）型電磁閥配線時,，有極性嗎？

電磁閥的電源線為紅色與黑色時,，紅色接正（+）,、黑色接負（-）。DIN型端子以及插座型端子等沒有電源線的情況下,，1號端子接正（+）,、2號端子接負（-）。除此之外,，不分極性,。

SMC電磁閥通過控制器切換脈沖的電極觸點來改變電磁閥的開關(guān)狀態(tài)，當控制器發(fā)出電脈沖時,，驅(qū)動閥芯克服永磁力產(chǎn)生上下移,，閥瓣到位后在永磁作用下處于自保持狀態(tài)，同時用屏蔽技術(shù)，防止外界干擾,。

日本SMC電磁閥線圈通電,。此時，電磁閥鐵芯在電磁力的作用下克服回復(fù)彈簧作用力移到單管端,，關(guān)閉單管端出口,，雙管端出口處于開啟狀態(tài)，制冷劑從電磁閥雙管端出口管流向冷凍室蒸發(fā)器流回壓縮機,，實現(xiàn)制冷循環(huán),。

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