接近開關(guān)、PR18-5DN、PR18-5DP
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產(chǎn)品名稱: 接近開關(guān)、PR18-5DN、PR18-5DP
產(chǎn)品型號: PR18-5DN、PR18-5DP
產(chǎn)品展商: 其他品牌
產(chǎn)品文檔: 無相關(guān)文檔
簡單介紹
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接近開關(guān)、PR18-5DN、PR18-5DP
的詳細介紹
接近開關(guān)、PR18-5DN、PR18-5DP接近開關(guān)現(xiàn)貨供應(yīng)
接近開關(guān)是一種具有開關(guān)量輸出的位置傳感器，它既有行程開關(guān)、微動開關(guān)的特性，同時又具有傳感性能， 接近開關(guān)重復(fù)定位精度高、瞬變過程短、輸出功率大、急電特性好、工作穩(wěn)定可靠、使用壽命長，被廣泛用于礦山、冶金、電力、煤巖、鋼鐵、石油、化工等行業(yè)。
接近開關(guān)說明：
1.接近開關(guān)有兩線制和三線制之區(qū)別，三線制接近開關(guān)又分為NPN和PNP型，它們的接線是不同的，見下圖
2.兩級制接近開關(guān)的接線比較簡單，接近開關(guān)與負載串聯(lián)后接到電源即可
3.三線制接近開關(guān)的接線：紅（棕）線接電源正端；藍線接電源OV端；黃（黑）線為信號，應(yīng)接負載，而負載的另一端是這樣接的：對于NPN型接近開關(guān)，應(yīng)接到電源正端；對于PNP型接近開關(guān)，則應(yīng)接到電源OV端。
4.接近開關(guān)的負載可以是信號燈、繼電器線圈或可編程控制器PLC的數(shù)字量輸入模塊。
5.需要特別注意接到PLC數(shù)字輸入模塊的三線制接近開關(guān)的形式選擇。PLC數(shù)字量輸入模塊一般可分為兩類，一類的公共輸入端為電源OV，電流從輸入模塊流出（日本模式），此時，一定要選用NPN型接近開關(guān)；另一類的公共輸入端為電源正端，電流流入輸入模塊，即阱式輸入（歐洲模式），此時，一定要選用PNP型接近開關(guān)，千萬不要選錯了
6.兩線制接近開關(guān)受工作條件的限制，導(dǎo)通時開關(guān)本身產(chǎn)生一定壓降，截止時又有一定的剩余電流流過，選用時應(yīng)予考慮。三線制接近開關(guān)雖多了一根線，但不受剩余電流之類不利因素的困擾，工作更為可靠。
7.有的廠商將接近開關(guān)的“常開”和“常閉”信號同時引出，或增加其它功能，此種情況，請按產(chǎn)品說明書具體接線。
麻城麻城**廠家，供應(yīng)接近開關(guān)、接近傳感器
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