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hnyyhym
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樓主  發(fā)表于: 2014-11-11 19:58
在網(wǎng)上買(mǎi)了幾個(gè)變頻器，但它的485接口二線(xiàn)電壓只有0.68v左右，幾臺都是這樣，但是又能夠通信，我量其它變頻器，plc都是4v左右電壓，這正常嗎？
修緣168
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1樓  發(fā)表于: 2015-07-07 05:14
這個(gè)電壓真沒(méi)有注意過(guò)。有時(shí)間量一下看看。

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