廈門莫格電氣自動化有限公司

GE IC660BBA020

咨詢熱線--17750626260

輸入接線
PLC一般接受行程開關(guān)、限位開關(guān)等輸入的開關(guān)量信號。輸入接線端子是PLC與外部傳感器負(fù)載轉(zhuǎn)換信號的端口。輸入接線，一般指外部傳感器與輸入端口的接線。
輸入器件可以是任何無源的觸點或集電極開路的NPN管。輸入器件接通時，輸入端接通，輸入線路閉合，同時輸入指示的發(fā)光二極管亮。
輸入端的一次電路與二次電路之間，采用光電耦合隔離。二次電路帶RC濾波器，以防止由于輸入觸點抖動或從輸入線路串入的電噪聲引起PLC誤動作。
若在輸入觸點電路串聯(lián)二極管，在串聯(lián)二極管上的電壓應(yīng)小于4V。若使用帶發(fā)光二極管的舌簧開關(guān)，串聯(lián)二極管的數(shù)目不能超過兩只。
另外，輸入接線還應(yīng)特別注意以下幾點：
(1)輸入接線一般不要超過30m。但如果環(huán)境干擾較小，電壓降不大時，輸入接線可適當(dāng)長些。
(2)輸入、輸出線不能用同一根電纜，輸入、輸出線要分開。
(3)可編程控制器所能接受的脈沖信號的寬度，應(yīng)大于掃描周期的時間。

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廈門莫格電氣自動化有限公司     
聯(lián)系人：張芳（銷售工程師）                                         
手   機：17750626260
Q     Q：177763184                        
郵    箱：177763184@qq.com
傳    真：0596-6514751（請備注張工收）  
網(wǎng)    址：http://www.mogget.cn/
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