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kingfeng1983
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樓主  發(fā)表于: 2008-12-20 15:26
首先得說(shuō)   我的應用經(jīng)驗不不多,而且僅限于繼電器輸出型的。
我知道需要驅動(dòng)步進(jìn)電機時(shí),要用晶體管性的
但是,三菱的晶體管輸出型的輸出全是晶體管輸出,1個(gè)點(diǎn)給步進(jìn)電機發(fā)脈沖,其余的不都浪費了嗎?
而且我看資料,晶體管輸出的額定電流很小,只有零點(diǎn)幾安。它能驅動(dòng)咱們常用的用來(lái)做隔離的中間繼電器嗎?或者其他負載?
我還用過(guò)日本的一個(gè)小牌子IDEC,他的超薄型的PLC就只有幾個(gè)是晶體管輸出,而其他的輸出點(diǎn)都是繼電器型的輸出。并不是單一的一種輸出形式!
請高手指點(diǎn)!
另外咱用繼電器輸出時(shí),比如帶動(dòng)一個(gè)DC24V的中間繼電器,電流約為多大?
是不是超過(guò)晶體管的額定電流
wayu
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1樓  發(fā)表于: 2008-12-21 07:22
DC24V的中間繼電器電流約50mA.

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