
When the sound wave is returned at a different frequency the sensor knows that there is a moving object within the detection zone. A signal is sent to the internal relay, which is wired to the door control’s activation input. FACTORY DEFAULT SETTINGS The Herkules has been pre-programmed to the following settings to make the installation easier and user friendly. If settings need to be changed refer to manufacturer’s instructions. Mounting Height..............13' to 16' above the ground Rela