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2 Channel Relay Module 5V 12V 24V Control Board with Optocoupler Isolation High and Low Level Trigger 50x41x18.5mm (24V): Amazon.com: Industrial & Scientific
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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 - AliExpress
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