XY-LJ02 Modulo Relè Ritardo Temporizzatore Controllo Interruttore 6-30V Trigger Loop Timing

P7: Signal hold function If there is a trigger signal, the timing is cleared and the relay is kept on; when the signal disappears, the relay is disconnected after the timing OP; during the timing period, there is a signal again, the timing is cleared.

eBay