Adjustable Time Delay Cycle Relay Module Timer Circuit Trigger Switch 5-30V
4,47 €
(2):Trigger signal source: high level trigger (3.0V-24V) signal ground and system ground not common ground to improve the system's anti-interference ability (can also be shorted to common ground). P4.1: Signal hold function: if there is a trigger signal, the timing is cleared and the relay remains on; when the signal disappears, the relay is disconnected after the timing OP; during the timing period, when there is a signal again, the timing is cleared;.
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