BS EN 54-1:2021 pdf free download – Fire detection and fire alarm systems Part 1: Introduction.
3.43
line type heat detector
detector which responds to heat sensed in the vicinity of a continuous line
EXAMPLE Linear heat detectors, multipoint heat detectors.
3.44
linear heat detector
detector which responds to heat applied to any point along the length of the sensing element
3.45
manual call point
component of a fire detection and fire alarm system which is used for the manual initiation of an alarm
3.46
manual call point type A: direct operation
manual call point in which the change to the alarm condition is automatic (i.e. without the need for further manual action) when the frangible element is broken or displaced
3.47
manual call point type B: Indirect operation
manual call point in which the change to the alarm condition necessitates a separate manual operation of the operating element by the user after the frangible element is broken or displaced
3.48
multi-band flame detector
flame detector having two or more sensing elements each responding to radiation in a distinct wavelength range and each of whose outputs may contribute to the alarm decision
3.49
multi-sensor detector
detector using more than one sensor to respond to one or more phenomena of fire
3.50
network of CIEs
more than one CIE (function B) or more than one VACIE (function M) or a combination of both function
B and M, which are interconnected for transmitting information
Note 1 to entry: The requirements for a network of CIEs are given in EN 54-13. Note 2 to entry: See Annex 13 for examples.
3.51
non-detachable detector
detector which is designed to be mounted directly to a surface without the use of a mounting base
3.52
optical smoke detector
detector sensitive to combustion products capable of affecting the absorption or scattering of radiation in the infra-red, visible and/or ultraviolet regions of the electromagnetic spectrum
3.53
point detector
detector which responds to the phenomenon sensed in the vicinity of a fixed point
3.54
power supply equipment
PSE
component of a fire detection and fire alarm system which supplies power for the CIE or VACIE and/or for other components, including those fed with power from the CIE or VACIE
3.55
smoke detector
detector sensitive to particulate products of combustion and/or pyrolysis suspended in the atmosphere (aerosols)
EXAMPLE Point smoke detectors, aspirating smoke detectors, duct smoke detectors, line smoke detectors using an optical beam.
3.56
tactile alarm device
device able to generate a tactile sensation for warning person(s)
3.57
transmission path
connection between components used for the transmission of information and/or power
EXAMPLE Cables, radio links.
3.58
transmission path isolator short-circuit Isolator
device, which may be inserted into a transmission path of a fire detection and fire alarm system, to limit the consequences of low parallel resistance faults between the lines of this transmission path
Note 1 to entry: This device can be a physically separate device or it can be incorporated into another device (e.g. integrated into a smoke detector or detector base).
3.59
transmission path monitoring device end of line device
active or passive device, which may be inserted into a transmission path of a fire detection and fire alarm system, to facilitate the monitoring of a transmission path
Note 1 to entry: A transmission path monitoring device can be a physically separate device or it can be incorporated into another device (e.g. end sounder on the line, detector or loudspeaker).
Note 2 to entry: Transmission path monitoring is an inherent requirement in standards for components such as ClEf VACIE.