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DONGKER Optocoupler Isolation Board,AC 110V 220V 8 Channel Optical Control Module PLC NPN Low Level Output Module bee and very secure due toDONGKER Optocoupler Isolation Board,AC 110V 220V 8 Channel Optical Control Module PLC NPN Low Level Output Module Description: It is a AC 110V 220V 8 Channel Optocoupler Isolation Module. It can detect 8 Channel AC input power sources and output DC voltage according to the detection results. The output results can be applied to PLC system and other control equipment. It can detect whether there is input power. The output status will change when the