Relay module with adjustable timer from 0 to about 60 seconds. The circuit works on a simple principle: when 12V power is supplied to the input VCC, GND it turns on the relay and starts measuring the set time and when this time is over the module turns off the relay.
The circuit can also be excited by applying a voltage to the SVCC input as the plus of the power supply and SIG as the minus of the power supply. The signal voltage range is from 3 to 20V. The circuit starts counting down from the disconnection of the signal voltage, so the signal must be a pulse.
The module has a control relay at its output, which, depending on the operating state, opens or closes its contacts, thus controlling any working circuit, which can be roughly compared to the operation of an ordinary ON/OFF switch.
Relay does not output voltage.
Example application :
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