Use the General I/O Interface (GPIO) on the front end of main unit to access an external wired alarm devices like PIR sensor, Gas Detector, Infra-red pool alarm and etc.
The terminal definitions are described below :
POWER: This terminal can provide DC power to a wired alarm devices. The max power for external device is 12VDC ± 5%, 0.5A.
This is a optional, you can use the alarm device with an external power supply.
WARNING: The maximum rating voltage of alarm device CAN NOT less than 12VDC, or you will damage the alarm device.
DO: With a maximum load of 400mA and a maximum voltage of 40V DC, This terminal has an open-collector NPN Darlington transistor with the emitter connected to the GND terminal.
If used with an external relay, a diode must be connected parallel with the load, for protecting against voltage transients.
Please refer to the following diagram for the connection method.
Be careful about choosing Open or Grounded when connecting to an alarm or other device, you need to make the relevant settings to the camera as the picture below:
(Login web application –> Task –> Digital I/O Setup )
The Grounded means that DO short to GND inside the camera.
The Open means that DO is floating inside the camera.
DI: This terminal which is used to connect the relay output of wired alarm device like PIR sensor, Gas Detector, Infra-red pool alarm and etc.
Be careful about choosing Open or Grounded when connecting to the terminal of alarm output, you need to make the relevant settings to the camera, do it like this: setting–> Task–> Digital I/O Setup–> you can do it as the picture below:
The Grounded means that DI is shorted to GND. In this way, DI should be connected to N.O(Normal Open) terminal.
The Open means that DI is floating from GND. In this way, DI should be connected to N.C (Normal Close) terminal.
GND: This terminal used to COM terminal for Relay output of alarm device. When Terminal 1 connect +DC terminal of alarm device, please connect this terminal to GND or –DC terminal of the device.
This is an optional, you can use the alarm device with an external power supply.