XYCOM 9450-27B1319010000

XYCOM 9450-27B1319010000有源三線(xiàn)傳感器（電感接近開(kāi)關(guān)、電容接近開(kāi)關(guān)、霍爾接近開(kāi)關(guān)、光電開(kāi)關(guān)等）直流有源三制線(xiàn)接近開(kāi)關(guān)與光電開(kāi)關(guān)輸出管使用三極管輸出，因此傳感器分NPN和PNP輸出，有的產(chǎn)品是四線(xiàn)制，有雙NPN或雙PNP，只是狀態(tài)剛好相反，也有NPN和PNP結(jié)合的四線(xiàn)輸出。

NPN型當(dāng)傳感器有檢測(cè)信號(hào)VT導(dǎo)通，輸出端OUT的電流流向負(fù)極，輸出端OUT電位接近負(fù)極，通常說(shuō)的高電平翻轉(zhuǎn)成低電平。

PNP型當(dāng)傳感器有檢測(cè)信號(hào)VT導(dǎo)通，正極的電流流向輸出端OUT,輸出端OUT電位接近正極，通常說(shuō)的低電平翻轉(zhuǎn)成高電平。

電路中三極管的發(fā)射極上的電阻為短路保護(hù)采樣電阻2-3Ω不影響輸出電流。 三極管的集電極的電阻為上拉與下拉電阻，提供輸出電位，方便電平接口的電路，另一種輸出的三極管集電極開(kāi)路輸出不接上拉與下拉電阻。

XYCOM 9450-27B1319010000 

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