What is a fire alarm system?
A fire alarm system is a collection of devices and equipment that is designed to cause a response by people.
A person's chance of surviving a fire really depends on time. We need to have enough time to escape a fire. It really depends on two things, one is the point in time where we recognize that there is a fire, and two is a point in time which we cannot escape a building. This is the tenable period during a fire development.
A fire alarm system usually cannot help us with the latter point. Sprinkler systems and smoke control systems help a building maintain tenability longer, but a fire alarm systems are designed to address the first point, that period of time where we're able to recognize to detect a fire. Fire alarm systems move up the timeline on when that recognition point occurs.
Fire alarm systems monitor conditions within the structure, and when the right indicators happen, the fire alarm system alerts the correct people.
To achieve this, there are basically three components they go into a fire alarm system.
We have initiation devices, notification appliances, and control equipment. Let's talk about each of these in more detail.
Initiation devices is it part of the system that is looking for a change of state on some portion of the building. If we have an input output machine, initiation devices are on the input side. They're constantly monitoring to see if something in the building is in an abnormal condition.
Initiation devices can include smoke detectors, manual pull stations, heat detectors, video flame detectors, carbon monoxide detectors, or monitor modules that keep an eye out on other systems like kitchen hood suppression or clean agent or sprinkler systems.
These can be automatic, like a smoke detector, where no human intervention is needed in order to pick up a signal. Or they can be manual, like a pull station, or you need a human interaction in order to make something happen.
NOTIFICATION APPLIANCES .
In our input output machine analogy, notification appliances would be the output.
Notification appliances is the second main category of the fire alarm system.
They are the warning beacon that is an attempt to make people aware of a certain condition. Notification appliances can include strobes, horns, speakers, bells, chimes, buzzers, sirens, text boards, or other features.
The goal is to produce a visual and audible encouragement shall we say to get people to evacuate or relocate within a building.
Systems can get fairly advanced on the notification side. Fire alarm systems are sometimes combined with mass notification systems and can include messaging that goes far beyond just fire conditions. They can alert to severe weather, active shooter situations, bomb threats, have live voice messaging, and a whole host of other site-specific messages.
Last is CONTROL EQUIPMENT.
This is the brain of the system.
Control equipment takes the circuitry from initiation devices, applies the logic that we have programmed in and then outputs our desired notification. Fire alarm control equipment can range quite a bit in its technology. There are small conventional type panels that have limited capabilities all the way up through addressable control panels that have texts displays that read out the locations of where device is activated all the way through graphic display workstations that show floor plans and actual locations of devices.
What is a fire alarm system? A fire alarm system is a collection of devices and equipment that monitors a structure for a variety of different conditions, and when necessary, triggers notification that is designed to create a human response.
A whole lot more detail on these systems to follow.
I'm Joe Meyer, this is MeyerFire University.
Sentry Page Protection