Video door phones in 4.3 and 7 inch have their own supply. The door panel and the flat screen are not the same fault. If there is KNX I do not touch the program. I only measure the line.
Bticino
Diyafon
Video door phones in 4.3 and 7 inch have their own supply.
Questions
Is this page that company's catalog?
No. I describe the families I meet on site. The order code is read off the label. The price is written after measurement.