AVer SD1306 user manual - Manual (Page 13)

9
4. I/O Configuration

I/O Connection
a. Please connect the G & AO pin to the external relay (buzzer) device.
b. Please connect the G & A-I pin to the external trigger device.
c. I/O PIN definition.
 G (Ground, GND)
 AO (Digital Output, DO): DC 5V, initial state is High
 A-I (Digital Input, DI): Max. 50mA, DC 5V, initial state is High
 A-O Audio Output
 M-I Microphone Input
When no event happens, DO output is 5V (DO and GND are disconnected). When the camera
detects event happening and triggers external alarm, DO output is 0V (DO and GND are
connected).
If you select "N.O" in "Input sensor setting", when external device or circuit makes DI and GND
pin connected, the camera input alarm is triggered, and then camera will execute the action
user has set, for example, send snapshot to E-mail address.