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This DC 24V 2-channel relay module adopts optocoupler isolation technology to isolate control circuit and load circuit, greatly improving system stability and anti-interference capability. It supports high and low level dual trigger modes to meet different signal control demands. Two channels work independently without mutual interference, featuring sensitive response and reliable switching performance. Ideal for industrial control equipment, smart home automation, PLC expansion, Arduino electronic DIY and 24V circuit on-off control projects.