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PC817 2 4 8 Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module

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Optical Isolation Module Limit Switching Frequency 20KHZ 12V To 3.3V 8 Channel Optocoupler PLC Signal Converter Board

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PC817 Optocoupler Isolation Board Voltage Converter Adapter Module 2/4/8 Channel Optocoupler Isolation Module DIY Kits

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Optical Isolation Module 24V To 5V 8 Channel Optocoupler PLC Signal Converter Board