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

4pcs 1 Channel DC 24V Relay Module with Optocoupler - High/Low Signal Support

5V 1 Channel Relay Module Optocoupler Isolation High Low Level Trigger 250V 10A

2Pcs DC 24V 1 Channel Relay Module with OPTO Isolation Support High or Low Level

4pcs DC 5V Relay Module 1 Channel Optocoupler Isolation

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2 Channel 24V Relay Module Board, Optocoupler Isolation, High Low Level Trigger