Input part
DC +: connected to positive power source (supply power according to the relay voltage)
DC -: connected to negative power source
CH1: 1-channel relay module signal triggering end (effective at low level)
CH2: 2-channel relay module signal triggering end (effective at low level)
CH3: 3-channel relay module signal triggering end (effective at low level)
CH4: 4-channel relay module signal triggering end (effective at low level)

(SU-5V4ChannelSolidStateRe)

SKU SU-5V4ChannelSolidStateRe
Brand Sunfounder

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