How to properly connect the internal and external photocells in a swing gate automation system?
Photocells in the automation system
In a swing gate automation system, photocells play a crucial role in ensuring safety and proper operation of the system. Usually, two pairs of photocells are used: one internal pair and one external pair.
Connecting the external photocells
External photocells must be connected to the safety photocell contact dedicated to closing. This is important so that, during gate opening, the intervention of the external photocells does not block the movement when a vehicle is entering. In this way, the gate can open without interference:
- Contact name: safety photocells only for closing
- Function: intervene only during the gate closing phase
- Behavior: block the gate if it is closing and reopen it to allow passage
Connecting the internal photocells
The internal photocells, located at the end of the gate opening zone, serve a different function. These must be connected to opening photocells, as they intervene when the gate is opening and there is no free space:
- Contact name: opening photocells
- Function: stop the gate if an obstacle is detected during opening
- Behavior: resume opening only when the area is again free
Conclusion
Properly connecting the internal and external photocells in a swing gate automation system is essential to ensure maximum safety. External photocells should be connected for the closing phase, while internal ones monitor the opening, ensuring smooth operation and accident prevention.