Feature:
It is a high-precision, stable and reliable timer relay module.
Supports 2 modes, single mode (one time) and loop mode, you can easily switch modes by adjusting the jumpers.
There are a variety of voltage and time ranges to choose from, both "on" and "off" times are adjustable.
Equipment and product burn-in tests can control reciprocating strokes or repeated power switches.
Widely used in timer operating equipment, machine repeat test circuits, fish tank intermittent pumps, etc.

Specifications:
Maximum Load Capacity: 10A250VAC, 10A30VDC
Size: 70 * 20mm / 2.75 * 0.78"
Time error: <2%

T1 (relay open delay time), T2 (relay off delay time)

Once the mode (jumper OP3):
1. The module is powered on, the relay is turned on when triggered, the delay is T1, and the relay is disconnected.
2. When the delay process is triggered, it triggers again and it immediately interrupts the delay.

Loop mode (jumper OP4):
1. The module is powered on, the relay is turned on when triggered, the delay is T1, the relay is turned off, the delay is T2, and the relay is turned on again. Such a loop. T1 and T2 are respectively set by two adjustable resistors.
2. When the delay process is triggered, it triggers again and it immediately interrupts the delay.

How to set the time quickly:
The time can be set quickly by measuring the voltage (Uc) of the resistor. Take the 5V 15min module as an example. If Uc = 2V, time = 2V / 5V * 15min = 6min.