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廈門泰尼電氣有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
會(huì)員1.png)
![]() |
廈門泰尼電氣有限公司
主營(yíng)產(chǎn)品: AB模塊PLC |
參考價(jià) | 面議 |
聯(lián)系方式:張亮查看聯(lián)系方式
更新時(shí)間:2018-04-23 04:54:25瀏覽次數(shù):205
聯(lián)系我們時(shí)請(qǐng)說明是泵閥商務(wù)網(wǎng)上看到的信息,謝謝!
P0700HU*-*P0700HU
P0700HU*-*P0700HU 在進(jìn)行RS-485通信時(shí),發(fā)送和接收使用同一對(duì)信號(hào)線,器件與微處理器的連接信號(hào)除了發(fā)送信號(hào)、接收信號(hào)外,還包含發(fā)送和接收的控制信號(hào),由接收和發(fā)送控制端決定器件處于接收或發(fā)送狀態(tài),并決定信號(hào)的流向。圖3(a)所示的MAXIM公司的MAX485即屬于此類器件,除了發(fā)送和接收信號(hào)DI、RO外,還具有發(fā)送允許控制信號(hào)DE和接收允許控制信號(hào)-RE。此器件的發(fā)送允許信號(hào)和接收允許信號(hào)不能同時(shí)有效,當(dāng)發(fā)送允許信號(hào)DE有效、-RE無效時(shí),輸出發(fā)送器有效,在A、B端輸出差分信號(hào),當(dāng)DE無效、-RE有效時(shí),輸入接收器有效,在RO端輸出與A、B信號(hào)相關(guān)的邏輯高電平或低電平。控制DE、-RE信號(hào),可實(shí)現(xiàn)如圖3(b)所示的點(diǎn)對(duì)點(diǎn)的半雙工方式。公司 名稱:廈門泰尼電氣有限公司
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公司地址:廈門市海滄區(qū)海滄街道濱湖一里7號(hào)2008室
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