Many Wisenet cameras offers alarm inputs and outputs, these are TTL outputs and are not volt free, a transistorised relay is required to obtain a volt free output.
A separate power supply is needed to power the transistorised relay.
- In the below example we are using a 12V transistorised relay connected to the alarm out (orange) wire and the ground (black) wire of the camera.
Note - The jumper must be set to L for proper operation.
The above example would be ideal for releasing a door lock or carpark barrier.