Abstract
This article describes the distribution of the disk FT8411 broadcasting , it is a matching products of fire Emergency Broadcast System. First,we introduce its system architecture and system description. Its linkage with the Fire Services Controller, cd Road release site, audio amplifier, radio control module and other equipment composition of the emergency broadcasting system. Fire emergency radio that also takes care of the needs of radio broadcasting background, can freely switch between the two. With automatic, manual control mode two ways. Automatic mode, manual priority; manual mode, need manually control for the realization of external broadcasting.
In this paper, we have detailed analysis of its internal circuit, functions and methods of operation. It connected with the fire services as well as cd playback disk controller by RS485 serial bus,completion of the Fire Services Joint Control. In addition, according to the needs of the scene, you can add two expansion plates, increasing the number of the control region, and it can access up to two-way amplifier to meet the maximum needs of engineering. This article also describes the input and output characteristics, key principles, setting description , the external wiring description, terminal description as well as instructions and data transmission format.
Keywords:Fire emergency systems;Broadcasting allocation of disk; RS485 bus