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iamjww48
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樓主  發(fā)表于: 2009-05-13 17:00

請問(wèn)這里的U2是什么芯片？？？有用的的朋友嗎？？？急用，謝謝了
1075861413
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1樓  發(fā)表于: 2009-05-13 19:59
max202是專(zhuān)為RS-232通信接口設計的收發(fā)器,用MA232代替時(shí)外接電容值不同,具體可上網(wǎng)查下.FX2N同電腦9針串口數據線(xiàn)其實(shí)是RS422(PLC)轉RS232(電腦)數據線(xiàn),我聽(tīng)同行講過(guò)自制的數據線(xiàn)比原裝的SC-09傳輸速度慢很多,區別就是MAX232外接電容不同.現SC-09才賣(mài)30元,買(mǎi)條拆開(kāi)看看.

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