2.5 Digital I/O Connector Block
The I/O connector on the back of the camera provides a central interface between your home security system and various input devices.
The two digital inputs are normally used with security sensors. They work by detecting a change in the state of an open or closed circuit. You can check the status of the circuit in [Setup] > [Event Setup] > [I/O Status]
The output port is normally used to trigger external audio or visual indicators, like sirens or strobe lights.
