B. ADDRESSABLE OR “ INTELLIGENT ” FIRE ALARM SYSTEM (Cont.)

Addressable Fire Alarm Panel

Allows security staff to determine exactly from where the alarm is coming without searching the entire building. Being intelligent implies that each detector can “think” independently, determining when and where there is a fire. The panel provides the information about the sensor’s performance, event log, indication when the sensor needs servicing.
Unlike conventional alarm methods, these systems monitor and control the capabilities of each alarm initiating and signaling device through microprocessors and system software.

A. CONVENTIONAL FIRE ALARM SYSTEM

 A.K.A  “point wired” fire alarm system. One or more circuits are routed through the protected spaces or building. Along each circuit one or more detection devices are placed
System is often the natural choice for smaller system. Conventional type monitors the condition of each circuit by sending a small current through the wire. Should a fault occur, such as due to wire break, this current can not proceed and is registered as “trouble” condition.

Fundemantal of Fire Alarm System

In order to undertake the process of designing a fire Alarm and Detection system for a building it is essentially  necessary to have a full understanding, if not, the fundamentals of the relevant design standards, codes, ordinances, the legal framework surrounding building safety legislation and a sound working knowledge of product application theory. The following system design process is intended to give a reasonable overview of all the areas of knowledge required for the successful design of a fire alarm system. Due to the complex nature of legislation and design standards relating to fire alarm system design, this chapter will somehow serve as  a very useful source of background information to which further application specific detailed information can be added from other sources as required.

            Basically, a fire is a chemical reaction in which a carbon based material (fuel), mixes with oxygen (usually as a component of air), and is heated to a point where flammable vapors are produced. These vapors can then come in contact with something that is hot enough to cause vapor ignition, and a resulting fire. In simple terms, something that can be burn touches something that is hot, and a fire is produced.