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SIMATIC S7-200西門子模塊6ES7292-2AA00-0XA0
SIMATIC S7-200西門子模塊6ES7292-2AA00-0XA0 價格:1688  元(人民幣) 產(chǎn)地:本地
最少起訂量:1 發(fā)貨地:福建廈門市
上架時間:2023-06-08 10:09:39 瀏覽量:47
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SIMATIC S7-200西門子模塊6ES7292-2AA00-0XA0

SIMATIC S7-200西門子模塊6ES7292-2AA00-0XA0

SIMATIC S7-200西門子模塊6ES7292-2AA00-0XA0

調(diào)制輸入時,需要一個低通濾波器(LPF)將高頻載波從實際數(shù)據(jù)中除掉,然后再到達(dá)
輸出多路器。圖2和圖3給出了高頻通道和低頻通道及相應(yīng)的代表性波形。
將單端輸入信號分離成微分信號分量A和/A。每個信號分量然后再微分成瞬變B和/B。
跟隨的比較器對瞬變進(jìn)行比較。只要比較器正輸入的電位高于負(fù)輸入端電位,比較器輸出即為
邏輯高,這樣就將輸入瞬變轉(zhuǎn)換成了短輸出脈沖了。

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輸出脈沖置位及復(fù)位‘或非'門跳轉(zhuǎn)。我們可以從真值表看出,‘或非’門配置有 一個反向跳
轉(zhuǎn),即輸入C的高電平將輸出/D置為高,而/C為高電平則將D置為高。因為比較器輸出脈沖
持續(xù)時間短,就可能出現(xiàn)兩個輸出都為低的情況。這時,跳轉(zhuǎn)將其之前的輸出狀態(tài)存儲了下
來。由于/D的信號與輸入信號在形狀和相位上都相同,/D就成為了高速通道的輸出而與輸出
多路器相連。
隔離工業(yè)接口時,需要區(qū)分過程控制和工廠自動化應(yīng)用。這是因為兩者之間的差別會影響
到數(shù)字接口設(shè)計的隔離工作。過程控制一般涉及到檢測某些設(shè)備、系統(tǒng)或過程的不同物理量
(如壓力“與”溫度)。每一個物理量都用--特定類型的傳感器或變換器,其輸出信號需要特定
的信號調(diào)理。
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