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220V 1 Channel PLC Optocoupler Isolation Module Isolated Board with Din Rail Holder PLC Processors TTL level Output 3-5V

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5V 12V 24V One 1 Channel Relay Module 30A with Optocoupler Isolation Supports High/Low Level Trigger with Guide Rail

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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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1

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