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4 CH 12V to 12V Digital Logic Level Conversion Photoelectric Isolation PNP NPN

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4 CH 24V to 3.3V Digital Logic Level Conversion photoelectric Isolation PNP NPN

4 CH 24V to 24V Digital Logic Level Conversion Photoelectric Isolation PNP NPN

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10X 4ch 24V to 3.3V 5V 12V 24V Digital logic level conversion module in PNP/NPN out NPN OUT Optical Isolation Board

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