A fire alarm system is a device designed to alert people from visual and audio alarms when smoke/fire is present. These alarms may be activated from smoke detectors, heat detectors, or from a fire alarm pull station.An automatic fire alarm system is designed to detect the presence of fire by monitoring environmental changes associated with combustion. Fire alarm systems are used to notify people to evacuate in the event of a fire or other emergen
Conventional Fire Alarm System
Conventional systems are so called because they are the older type of fire alarm systems. The detector communicates with the fire alarm control panel simply by changing state from high impedance to low impedance when smoke is detected. Smoke detectors are typically wired together up to 32 detectors on each zone and a single fire alarm control panel can usually monitor a number of zones which can be arranged to correspond to different areas of a building. In the event of a fire, the fire alarm control panel is able to identify which zone contains the detector or detectors in alarm, but it’s not able to identify which individual detector or detectors is in an alarm state.
Analog Addressable Fire Alarm System
This type of installation gives each detector on a system an individual number, or address. Thus, analog addressable detectors allow a fire alarm control panel,and therefore fire fighters, to know the exact location of an alarm. In certain systems, a graphical representation of the building is provided and the exact location of the alarmcan indicated on the diagram.Analog addressable systems are usually more expensive than conventional non-addressable systems, and offer extra options, such as a custom level of sensitivity(sometimes called Day/Night mode) and contamination detection from the main panel that allows determination of a wide range of faults. Panels can also be interconnected to control a very large number of detectors in many other buildings commonly used in hospitals, universities, resorts and similar large centers.