(HSV home intelligent community security system is a set of advanced fieldbus alarm system, which, together with v-home security monitoring software based on windows98/2000/xp operating platform, can be applied to anti-theft alarm and perimeter alarm of all residential communities and buildings, and has alarm linkage, map display and other functions.?? The security system of HSV home intelligent community is composed of monitoring software, central controller, system distributor, alarm input keyboard, alarm input module and alarm linkage output module, which can monitor up to 24000 alarm devices. Among them, the central controller is the most important component. It completes the key functions such as data acquisition, data preprocessing, data backup, bus control, protocol conversion and so on. It is the central link connecting the computer operating platform and the fieldbus.?? The security system of HSV home intelligent community is equipped with a home alarm host, including the six / eight zone alarm host applicable to the home, the general four zone and six zone alarm modules, etc. The flexible configuration makes it also applicable to shopping malls, office buildings, factories, schools and other occasions that need alarm monitoring.?? HSV home intelligent community security system is a field bus controller based on control area network (can). Compared with the traditional bus type professional area alarm system based on RS485 bus control system, it solves the contradiction between large control range and system reliability, and has strong practicability and operability.)