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cyh1986
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樓主  發(fā)表于: 2018-05-19 18:02
最近有個(gè)項目上面要幾個(gè)接近開(kāi)關(guān)同時(shí)碰到之后才能動(dòng)作。我想有沒(méi)有這樣一個(gè)東西,類(lèi)似于安全繼電器,但是價(jià)格便宜一點(diǎn)的。用接近開(kāi)關(guān)驅動(dòng)繼電器然后串并聯(lián),接線(xiàn)麻煩了點(diǎn)。
ranbin
學(xué)無(wú)止境!
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1樓  發(fā)表于: 2018-05-20 08:25
一:如果有PLC就不會(huì )這么麻煩!直接程序里面可以解決;
二:沒(méi)有PLC可以實(shí)現好幾個(gè)接近開(kāi)關(guān)(三線(xiàn)制)的直接串聯(lián)(看直流穩壓電源的輸出功率要大于傳感器總電流的總和),輸出接另外一個(gè)的電源(0V共用)------我用過(guò)這種很好用,并聯(lián)的話(huà)就沒(méi)有必要了;
三:接近開(kāi)關(guān)直接驅動(dòng)普通繼電器(前提是看看繼電器的電流是否在接近開(kāi)關(guān)輸出電流的范圍內),然后實(shí)現繼電器串并聯(lián);

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