At the beginning of any detect fire and security project any fire alarm system designer should choose and decide which system he should implement.
There are two worldwide known fire alarm systems to choose:
1- Conventional fire alarm system
2- Addressable fire alarm system
This is the most important and crucial step in fire alarm system design that is which system to chose between Conventional and addressable fire alarm systems
Let’s talk about the advantages & disadvantages of both systems and what is the key choice for both systems:
- Fire alarm system diagram:
Fire alarm system circuit is different for both systems.
In conventional fire alarm each zone (a lot of smoke detectors and manual call points) is connected to one contact in the main fire alarm control panel (two wires contact), so any detector sense a fire it gives the fire alarm control panel an indication of fire case in the whole zone.
The fire alarm control panel is a limited zone panel.
It could be 2 zones, 4 zones, 8 zones, 16 zones and 32 zones.
When I say the whole zone I mean that all detectors are seen as a one detector by the fire alarm control panel.
No individual addressing for each detector.
So the Conventional fire alarm system is applicable for small applications that has a few zones
But in addressable fire alarm system one can give an address to each individual fire alarm detector
The Fire alarm system diagram of conventional fire alarm system is as follows:
The Fire alarm system diagram of Addressable fire alarm system is as follows:
So the connection is a loop connection
Every point is connected to the fire alarm control panel through the loop connection which can be up to 250 point or detector
So the Addressable fire alarm system is applicable for large applications that has a lot of zones and need more details
Another thing you have to consider if you are designing commercial fire alarm system or residential fire alarm system?
Because an important factor is the fire alarm system cost
The commercial fire alarm system cost is very expensive compared to the conventional fire alarm system cost when applied to same application.
I will give you n example to let you understand how to choose the suitable fire alarm system for you application.
- Suppose you have an house of two floors and each floor has two rooms:
Total four rooms; what fire alarm system would you implement?
Of course a conventional fire alarm system because it is just 4 zones and you need a cheap system.
- Suppose you are in charge of control room that monitors all the apartments and buildings in a large residential compound that has more than 200 point to monitor; what fire alarm system would you implement?
Of course an addressable fire alarm system because it is more than 200 points and it is a large application fire alarm system.
If you are searching for a fire alarm training course and need more information about fire alarm system design types, here is your guide:
How to design a fire alarm system
How to install a fire alarm system
How to test and maintain a fire alarm system