12V 10A 1-Channel Relay Module with Timer - Triggered by Impulse - LED

Module with a relay and a timer, triggered by an impulse. The time for which the relay will be turned on is displayed on the LED display. The time after which the relay is to turn off is set using the buttons in the range of 1-999s.

The principle of operation of the module with a relay:

After connecting the power supply, the relay remains turned off, the relay is turned on by providing high level to the input pin marked TRIG. Time remaining until the relay is switched off is counted from the first high level detected at the input, providing with subsequent pulses has no effect on the countdown.

After turning on the power, the display shows the set time, after activating the relay, the remaining time is displayed.

Connecting the momentary button between the supply voltage plus and the triggering input will enable the relay to be switched on with the button.

A permanent short-circuit of the control input with the positive power supply will cause the relay to be activated after the module power supply is turned on, but only once.

Module specification:

Supply voltage: 12V DC
Current consumption: 20mA \ 50mA with the relay on
Permissible voltage on the control input: 5-12V DC
The TRIG control input has been isolated from the rest of the circuit by an optocoupler.
Module dimensions: 63.6mm × 33.1mm
The module has LEDs that indicate the supply voltage and the status of the relay.
Relay with a maximum load capacity of 10A

Time setting method:

Press button A to change the position that we want to set, first set hundreds, after pressing the next tens, then unity of time, another pressing switches us back to hundreds. Use the B button to set the value in a given position

Pinout:

VCC - positive power supply
GND - negative power supply
IN - trigger input
CB, COM, CK - relay contacts