Aver SF2111H-DVR user manual Manuel d'utilisateur télécharger pdf (Page 13)

4. I/O Interface

I/O Connection

a. Please connect the GND & DO pin to the external relay (buzzer) device.

b. Please connect the GND & DI pin to the external trigger device.

c. I/O PIN definition

 GND (Ground): Initial state is LOW

 DO (Digital Output): DC 5V

 DI (Digital Input): Max. 50mA, DC 5V

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Aver SF2111H-DVR user manual Manuel d'utilisateur Page 13