These days, security/surveillance systems are networked together. More importantly, they feature “distributed architectures.” This basically means that instead of having all processing capabilities residing at the head end (PC), processing is “distributed” at many points throughout the network. Field controllers provide this additional processing.
A field controller contains: a CPU (central processing unit), Network communications capability, I/O (input/output) modules (printed circuit boards), card reader modules (printed circuit boards).
Field controllers allow the system to continue to function when the head end (PC) is temporarily unavailable or if another section in the system is down. If this happens, the field controllers store all event activity in order to upload later to the head end (PC) once the system is functional again. If a field controller has requirement for additional information to process a command, it can request information from the head end (PC). Additionally, scheduled exchanges of required data between the head end (PC) and the field controllers allow tracking for events to be logged into history and the current information made available to the field controllers. Also note, our security networks are custom designed to use the industry standard communications protocols. This ensures high level of reliability and minimum down time in the event of component failures.
Access Control System Installations Sacramento california