PRAESENSA
About | en
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Bosch Security Systems B.V.
Underwriters Laboratories Listing Document (ULLD)
2021.12.21 | V0.15b | F.01U.402.882
1
About
This Underwriter’s Laboratory Listing Document (ULLD) describes the design and operation of
the Bosch PRAESENSA Public Address and Voice Alarm system, including the individual
PRAESENSA devices that may be used in standalone or networked configurations.
PRAESENSA provides the following main features:
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Networked system devices using a secure IP‑infrastructure
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Multi‑channel amplifiers with effective power utilization
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Fail‑safe redundancy for highest system availability
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Call station with touch screen for optimized user experience
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Scalable and flexible system for small to large applications
i
Notice!
When PRAESENSA is installed according this ULLD, PRAESENSA is compliant with the
Standards, page 10.
1.1
Nomenclature
Throughout this manual, a term like “fault” is used. Instead, a similar meaning/description can
be read.
Original description
Similar meaning/description
Fault
Trouble
1.2
System limitations
An automatic fire alarm system
- typically made up of smoke detectors, heat detectors,
manual pull stations, audible warning devices, and a fire alarm control panel (FACP) with
remote notification capability - can provide early warning of a developing fire. Such a system,
however, does not assure protection against property damage or loss of life resulting from a
fire.
An emergency communication system -
typically made up of an automatic fire alarm system
(as described above) and a life safety communication system that may include an autonomous
control unit (ACU), local operating console (LOC), voice communication, and other various
interoperable communication methods - can broadcast a mass notification message. Such a
system, however, does not assure protection against property damage or loss of life resulting
from a fire or life safety event.
Audible warning devices such as bells, horns, strobes, speakers and displays
may not alert
people if these devices are located on the other side of closed or partly open doors or are
located on
another floor of a building. Any warning device may fail to alert people with a disability or
those who have recently consumed drugs, alcohol, or medication. Please note that:
–
An emergency communication system may take priority over a fire alarm system in the
event of a life safety emergency.
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Voice messaging systems must be designed to meet intelligibility requirements as defined
by NFPA, local codes, and Authorities Having Jurisdiction (AHJ).
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Language and instructional requirements must be clearly disseminated on any local
displays.
