PERIMETRE SECURITY SYSTEM AND CENTRAL CONTROLLER THEREFOR Russian patent published in 2014 - IPC G06F9/00 G08B13/12 

FIELD: information technology.

SUBSTANCE: in the perimetre security system, an active central controller and a backup central controller are connected to each other in series through RS-485 ports (the second port of the active central controller is connected to the first port of the backup central controller) and RS-232 ports. The active and backup central controllers are completely identical and their operating modes (active/backup) are set by programming. The active central controller is capable of querying the state of perimeter alarm modules through their first or second RS-485 port. The backup central controller is capable of transmitting data between their first and second RS-485 ports. The active and backup central controllers are capable of transmitting through RS-232 ports data for synchronising the event log of the backup central controller and its current state which, after synchronisation, completely matches the current state of the active central controller.

EFFECT: securing a larger perimetre, controlling perimeter alarm modules upon loss of communication with the server, providing hot backup of the central controller with series connection, thereby simplifying the circuit for connecting the active and backup central controllers.

4 cl, 2 dwg