Features: This time delay relay can be powered with low voltage, minimum to 3V. Output optical coupling isolation improves anti-interference ability. The timer switch module is widely used to control motors, light bulbs, LED belts, DC motor, small pumps, etc. Commonly-used 3.7V lithium batteries, 5V power banks, switching power supply can be used to power this board. The timer relay module uses industrial level circuit board, and set parameters will be saved after power failure. Specification: Working current: DC 3V~7V Voltage range with jumper: 3 V~5.5V Voltage range without jumper: 3.8V~7V Signal source: DC 3V~12V (commonly use power supply positive trigger, button, PNP sensor, PLC signals, etc.) Output capacity: Can control equipment within DC 30V3A or AC 220V3A Quiescent current: 15mA Working current: 30mA Service life: ;100,000 times Operating temperature: -40℃~85℃ Size: 64.2*34.8*15mm / 2.5*1.4*0.6in Weight: 22g / 0.8oz (approx.) Package list: 1 * Module Function: Delay time range:Minimum 0.1 seconds, maximum 999 minutes, adjustable. P-1: Signal trigger relay is energized, and when time is over, relay is de-energized; during the period of delay: A: Trigger again is invalid B:Trigger again can start a new timing C:Trigger again will cause relay to reset and end timing P-2: Signal trigger starts timing for T1, when time is over, relay is energized for T2 then de-energized (reset) P-3: Cycle:Energized for T1, de-energized for T2, infinite cycle.Time of T1 and T2 are both adjustable. A: After powered on, relay is first energized then de-energized for a infinite cycle B:After powered on, relay is first de-energized then energized for a infinite cycle P-4: When there is signal, relay is energized; when signal disappears, it start timing, and relay is de-energized when time is over. During the period of delay, This time delay relay can be powered with low voltage, minimum to 3V. Output optical coupling isolation improves anti-interference ability. The timer switch module is widely used to control motors, light bulbs, LED belts, DC motor, small pumps, etc. Commonly-used 3.7V lithium batteries, 5V power banks, switching power supply can be used to power this board. The timer relay module uses industrial level circuit board, and set parameters will be saved after power failure.