BS EN 54-1:2011 pdf download – Fire detection and fire alarm systems Part 1 : Introduction
1 Scope
This part of EN 54 defines the terms and definitions that are used throughout EN 54. It gives the principles on which each part of the standard has been based and describes the functions carried out by the components of a fire detection and fire alarm system. This European Standard applies to fire detection and fire alarm systems in and around buildings. This European Standard does not apply to smoke alarm devices which are covered by EN 14604.
2 General
2.1 Standardization series EN 54 specifies:
requirements, test methods and performance criteria against which the effectiveness and reliability of the component parts of fire detection and fire alarm systems can be assessed;
requirements and test methods against which the ability of components to be combined into an effective system can be assessed;
guidelines for the incorporation and use of fire detection and fire alarm systems into buildings or other construction works.
2.2 General principles The function of a fire detection and fire alarm system is:  to detect fire at the earliest practicable moment, and to give signals and indications so that appropriate action can be taken;
to give audible and/or visible signals to the occupants of the building who may be at risk from a fire. The functions of a fire detection and fire alarm system may be grouped to form subsystems such as a fire detection subsystem and a voice alarm subsystem. As the system is required to function satisfactorily, not only under fire conditions, but also when exposed to conditions likely to be met in practice, the tests specified in the EN 54 series are intended to assess the performance of the components and the system under such conditions.
The performance of components is assessed from the results obtained in the specified tests and from their ability to perform the required functions.
This standard is not intended to place restrictions on the design or construction of components other than those necessary for the performance of desired functions.
The compliance of a component with the relevant part of EN 54 does not ensure that this component will necessarily function correctly when connected with another component also conforming to the relevant part of EN 54 (e.g. control and indicating equipment with a fire detector), unless both components have been assessed together as conforming to the requirements for a system.
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE 1 The list of components of fire detection and fire alarm systems is not intended to be exclusive.
NOTE 2 Definitions for other components may be added in later revisions of this European Standard or by amendment when such components are produced.
NOTE 3 Additional definitions specific to individual parts are included in those parts.
fire alarm and fault warning transmission system
system used for routing fire alarm and fault warning signals from fire detection and alarm systems in buildings to fire alarm and/or fault warning receiving centres
NOTE Alarm and fault transmission system comprises fire alarm routing equipment, fault warning routing equipment, receiving equipment and a communication network.
ancillary equipment
equipment which support fire related functions not currently defined in EN 54
aspirating smoke detector
smoke detector, in which air and aerosols are drawn through a sampling device and carried to one or more smoke sensing elements by an integral aspirator (e.g. fan or pump)
NOTE Each smoke-sensing element may contain more than one sensor exposed to the same smoke sample.
building management system
facilities used to monitor, control and manage equipment installed in a building for comfort, safety and/or security purposes
combustion gas detector
fire detector sensitive to gaseous products of combustion and/or thermal decomposition EXAMPLE Carbon monoxide fire detector.
process by which it is verified that the installed system meets the defined requirements