di801模块
di801 大多数机器控制设备都会产生感应噪声,这些噪声可能会导致故障,借助光耦合器,我们可以将这种噪声隔离在输入信号中。大多数光隔离器用于防止电路一侧的高压或快速变化的电压损坏元件或使另一侧的传输失真。
光隔离器工作原理
光隔离器所需的两个主要重要元件是光发射器和光检测器。光隔离器有一个光源,它几乎总是一个近红外发光二极管,可以将电输入信号转换为光。光电传感器和光通道可以检测光并可以直接产生电能,也可以调制从外部电源流出的电流。使用的传感器可以是光敏电阻、光电二极管或光电晶体管。LED可以感应光,也可以发光。光电二极管光隔离器用于光电耦合固态继电器,用于驱动电源开关。光源和传感器存在于开槽光学开关中,其光通道是开放的,这允许外部物体调制光,从而阻碍光的路径或将光反射到传感器中。
di801
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