di801模塊
di801 大多數機器控制設備都會產生感應噪聲,這些噪聲可能會導致故障,借助光耦合器,我們可以將這種噪聲隔離在輸入信號中。大多數光隔離器用於防止電路一側的高壓或快速變化的電壓損壞元件或使另一側的傳輸失真。
光隔離器工作原理
光隔離器所需的兩個主要重要元件是光發射器和光檢測器。光隔離器有一個光源,它幾乎總是一個近紅外發光二極管,可以將電輸入信號轉換為光。光電傳感器和光通道可以檢測光並可以直接產生電能,也可以調制從外部電源流出的電流。使用的傳感器可以是光敏電阻、光電二極管或光電晶體管。LED可以感應光,也可以發光。光電二極管光隔離器用於光電耦合固態繼電器,用於驅動電源開關。光源和傳感器存在於開槽光學開關中,其光通道是開放的,這允許外部物體調制光,從而阻礙光的路徑或將光反射到傳感器中。
di801
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