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樓主  發(fā)表于: 2017-11-14 09:24
我從舊設備上拆下了三個(gè)舊的em232模塊,在之前設備上一直用的是第一通道輸出,第二通道沒(méi)有使用,在舊設備上是可以正常使用的,但是我拆下來(lái)后,接到了一個(gè)剛買(mǎi)的cpu226上,在程序中給它一個(gè)16000的數字量后,發(fā)現第一通道輸出的電壓都不正常,輸出的是16.75v左右,第二通道正常,輸出的是5v左右,請問(wèn)這個(gè)是第一通道輸出口壞了?這么巧三個(gè)都壞了?但是之前是正常使用的,讓我很是費解,有大神知道的嗎懇請解答一下!

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