AVer FC1320-P&PW user manual - Manual (Page 14)

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2. Connector Instruction
The camera connectors are as below. Connect the power and the Ethernet cable with the camera,
and set it according to your network environment.
3. I/O Configuration
I/O Connection
a. Please connect the G & DO pin to the external relay (buzzer) device
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).