Low level trigger refers to the signal triggering voltage between the end and the negative electrode of the power supply is OV, or trigger terminal voltage lower voltage than the positive power supply voltage, low to can trigger, make the relay, is usually the cathode of the power supply and the triggering end of a trigger mode connection, so that the relay is attracted.

PWM DC 6V 12V 24V 28V 3A Motor Speed Control Switch Controller

SKU: 1602-151800116868-CHI