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1 to 10 channel relay module with optocoupler isolation, this specification is 5VDC 2 channel version. It supports both high and low level trigger modes, convenient for various single-chip microcomputer and PLC control projects. Isolation design greatly reduces circuit interference and improves system stability. Each channel features 1NO+1NC contact with 10A heavy load capacity, suitable for switching control of lights, motors, electrical equipment and intelligent automation projects. Multiple voltage and channel options available for flexible matching of different application scenarios.