Fire Alarm

A fire alarm system has a number of devices working together to detect and warn people through visual and audio appliances when smoke, fire, carbon monoxide or other emergencies are present. These alarms may be activated automatically from smoke detectors, and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Alarms can be either motorized bells or wall mountable sounders or horns. They can also be speaker strobes which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators.

We have three types of fire alarm system

ConventionalAddressableWireless

Conventional

A conventional system employs one or more initiating circuits, connected to sensors (initiating devices) wired in parallel. These sensors are devised to decrease the circuit’s resistance when the environmental influence on any sensor exceeds a predetermined threshold. In a conventional system, the information density is limited to the number of such circuits used. At times, a floor plan of the building is often placed near the main entrance with the defined zones drawn up, and LEDs indicating whether a particular circuit/zone has been activated. Another common method is to have the different zones listed in a column, with an LED to the left of each zone name.

Addressable

An addressable fire alarm system is made up of a series of fire detectors and devices that are connected back to a central control panel.

With addressable systems, each device has an address or location, enabling the exact detector that was triggered to be quickly identified. This makes the addressable alarm systems ideal for large buildings, particularly commercial premises spread over a wide area.

One of the biggest advantages of addressable fire alarm systems is that they can be configured so that a specific action triggers a specific response.

Conventional

A conventional system employs one or more initiating circuits, connected to sensors (initiating devices) wired in parallel. These sensors are devised to decrease the circuit’s resistance when the environmental influence on any sensor exceeds a predetermined threshold. In a conventional system, the information density is limited to the number of such circuits used. At times, a floor plan of the building is often placed near the main entrance with the defined zones drawn up, and LEDs indicating whether a particular circuit/zone has been activated. Another common method is to have the different zones listed in a column, with an LED to the left of each zone name.

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