1.Input power supply:5V DC (160MA).
2.Specification :”State of 0-2.5V low level relay ON;
State of 3-5V high level relay OFF”.
3.Interface:”DC+:connect to positive(according to the relay voltage supply)DC-:connect to negative CH relay module signal triggering side (high level trigger active)”.
4.Trigger voltage:low level 0-2.5V, high default 3.5-5V (in the case of voltage 12V trigger, you need a series resistance of a 5.1-6.8K before the trigger;24V voltage trigger, you need a 15-22K resistors in series before the trigger, otherwise it will burn the chip).