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2 Channel DC 5V 12V 24V 30A Relay Module with Optocoupler Isolation High Low Trigger Switch for Smart Home PLC Control|Integrated Circuits| - AliExpress
4-Channel DC 12V 30A Relay Module Control Board Optocoupler Isolation High/Low Trigger
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4-Channel DC 12V 30A Relay Module Control Board Optocoupler Isolation High/Low Trigger
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