Self design simple conventional fire alarm control panel. It has 3 zones IDC-expandable with pre-alarm features. Detects open and short circuit fault monitoring for IDC zones and NAC devices such as fire alarm bell. Automatic backup battery nonstop power if mains failure with battery disconnect monitoring. This design has the same features like the ones available conventional FACP panel with class b type wiring for IDC devices.. However subject for continuous improvements in the future...