Bosch Security Systems | 2004-06 | 9922 141 10371en
Plena Voice Alarm System | Installation and User Instructions | Application examples en | 18
2.5 Application: Hotel
2.5.1 Introduction
Smaller hotels are typical examples of applications with
relatively few zones, each with a medium to high output
power requirement. The priorities are speech
intelligibility and compliance with IEC60849 standard.
2.5.2 Requirements
In addition to mandatory voice alarm functionality for
evacuating guests and staff, an Econtroller system for a
hotel should also include BGM in the restaurant, bar
and lobby, plus public address functionality for general
paging. To ensure that all guests hear an emergency
message, the power output per zone is relatively high.
Outside areas such as car parking garages, require
weatherproof horn loudspeakers.
2.5.3 Solution
A Plena voice alarm controller handles routing to up to
6 zones, the additional 6 zones require a router. Both
the reception and office are equipped with call stations
plus keypads for individually addressing zones, while a
fireman’s panel (with overall priority) is built in by the
emergency exit. The Plena Voice Alarm System is a
two-channel system, so BGM can still be provided in
zones not receiving a call.
2.5.4 Power requirements
The system controller features a built-in 240 W booster
amplifier, able to drive up to 40 loudspeakers (6 W).
Additional Plena booster amplifiers are incorporated to
provide additional power, two-channel operation and
spare amplification. To facilitate phased evacuation
from different floors of the hotel, guest areas are divided
into separate zones, each fitted with 13 ceiling
loudspeakers in the corridors. The bar uses cabinet
loudspeakers, while the parking garage uses
weatherproof horn loudspeakers. The zones are defined
as shown in the table opposite.
2.5.5 System configuration
The Plena units, needed to build the application, are
listed in table 2.12. The interconnections are shown in
figure 2.4.
table 2.10: Summary of requirements
Requirements
12 zones (typically 10 to 20 zones in small hotels)
Speech intelligibility is the main priority
High power requirement (multiple loudspeakers)
per floor
Fireman’s panel by fire exit
Call stations in reception and office
Additional public address functions for paging
guests
BGM in lobby and restaurant
table 2.11: Power requirements per zone
Zone Description Power
1 Bar 3x6W cabinet
2 Restaurant 6x6W ceiling
3 Lobby 2x6W ceiling
4 Office 1x6W cabinet
5 Kitchens 2x6W cabinet
6 Parking garage 3x10W horn
7-12 Floors 1 to 6 78x6W ceiling
Total 582W
table 2.12: Used Plena units
Unit Description Number
LBB1990/00 Voice alarm controller 1x
LBB1992/00 Router 1x
LBB1996/00 Remote control panel 1x
LBB1997/00 RCP extension 1x
LBB1956/00 Call station 2x
LBB1957/00 CS extension keypad 3x
LBB1938/00 480 booster 2x
LBB1935/00 240W booster 1x
LBB1961/00 BGM source 1x
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