1CH/2CH/4CH Relay Module Board With Optocoupler H/L Level Triger 5/9/12/24V

Using SMD optocoupler isolation, driving ability, stable performance; trigger current 5mA;. It is low level triger if COM pin connect to LOW pin; It is high level triger if COM connect to High. Using SMD OPTOCOUPLER isolation, the trigger current only 5mA.

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