To connect your receiver to your main unit, all you need to do is to follow the steps below:

1) Type in the base code (1234). If you have changed it, type your chosen code;
2) Then press the "microphone" key on the main unit, effectively setting it to "learn" mode;
3) Within 30 seconds, activate your receiver/sensor without it being put in place, so as not to trigger the anti-stop contact at the rear;
4) The main unit will emit a confirmation "beep". Once this happens, your receiver/sensor is configured.

Take care not to be in the detection field of a motion sensor that has already been configured.