BS EN 54-1:2021 pdf download.Fire detection and fire alarm systems Part 1: Introduction.
3.17 earth fault unwanted connection between earth potential and any part of the CIE or VACIE, transmission paths to the CIE or VACIE, or transmission paths between parts of the CIE or VACIE
3.18 emergency microphone microphone for use by the fire service or trained operators as part of a voice alarm system
3.19 fault warning receiving centre centre from which the necessary corrective measures can be initiated on receipt of fault signals
3.20 fault warning routing equipment equipment which routes a fault warning signal to a fault warning receiving centre
3.21 fire alarm device component of a fire alarm system, not incorporated in the control and indicating equipment, which is used for warning persons EXAMPLE Fire alarm sounders, visual alarm devices, voice alarm loudspeakers, tactile alarm devices.
3.22 fire alarm receiving centre centre from which the necessary fire protection or fire-fighting measures can be initiated on receipt of a fire alarm signal
3.23 fire alarm routing equipment equipment which routes an alarm signal from a control and indicating equipment to a fire alarm receiving centre
3.24 fire alarm sounder sounder device able to generate an audible fire alarm signal for warning persons
3.25 fire brigade panel device connected to the CIE specifically designed for use by the fire brigade EXAMPLE Fire brigade control panel, fire brigade indicator panel.
3.26 fire detection and fire alarm system FDAS group of components including the control and indicating equipment which when arranged in (a) specific configuration(s) is capable of detecting and indicating a fire, and giving signals for appropriate action
3.62 visual alarm device device able to generate a flashing light for warning persons
3.63 visualization system additional equipment used to visualize the information provided by a fire detection and fire alarm system
3.64 voice alarm control and indicating equipment VACIE component of a voice alarm system that generates and transmits emergency messages or alarm signals to loudspeaker(s) when it receives alarm signal(s) from CIE and/or from manual controls Note 1 to entry: VACIE can vary in size and complexity from a single cabinet through to many cabinets distributed throughout a building or site.
3.65 voice alarm loudspeaker device able to generate a voice message and an alert signal from an electrical signal sent by the VACIE
3.66 voice alarm system group of components, including VACIE and loudspeakers, which broadcasts speech messages and/or warning signals in an emergency BS EN 54-1 pdf download.