The fire bus is composed of main and backup power and charge and discharge control circuit. The bus driver unit is responsible for providing power supply to field devices such as detectors connected to the controller, communicating with field devices such as detectors, and completing state monitoring and control of the status of field devices such as detectors.
The bus driver unit receives and processes the detector and other field device signals to achieve fault monitoring and fire alarm. The display key operation processing circuit processes the keyboard input signal and outputs the status information to the display. The input and output interface unit realizes the output of alarm signals such as fire alarm fault.