4 channels high speed PLC signal conversion board differential to single-ended converter 1MHz optocoupler isolation 5V NPN PNP
![4 channels high speed PLC signal conversion board differential to single-ended converter 1MHz optocoupler isolation 5V NPN PNP](http://ae01.alicdn.com/kf/HTB10LUhKgaTBuNjSszfq6xgfpXaX/4-channels-high-speed-PLC-signal-conversion-board-differential-to-single-ended-converter-1MHz-optocoupler-isolation.jpg_350x350.jpg)
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