Bosch Security Systems | 2004-06 | 9922 141 10371en
Plena Voice Alarm System | Installation and User Instructions | Application examples en | 14
2.3 Application: Swimming pool
2.3.1 Introduction
Swimming pools and other indoor sports and
recreational facilities are typical examples of smaller
applications with few zones. The main priorities are
excellent speech intelligibility and compliance with
IEC60849 standard (and its national equivalents),
although music in different areas is optional.
2.3.2 Requirements
An Econtroller system for a swimming pool requires
voice alarm functionality with public address
functionality for regular announcements and
background music (optional). To ensure that all visitors
in the relatively noisy pool area hear emergency
messages, the power output for that zone is relatively
high. Other areas, such as the changing rooms and
offices, have lower power requirements.
2.3.3 Solution
The Plena voice alarm controller handles routing to up
to 6 zones, so no additional routers are required. The
office/reception is equipped with a call station plus
keypad 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.
2.3.4 Power requirements
The voice alarm controller has a built-in 240 W booster
amplifier, making it possible to drive up to 40
loudspeakers with a power handling capacity of 6 W
each. The pool area requires highpower music horn
loudspeakers qualified for use in a high humidity
atmosphere. The snack bar uses cabinet loudspeakers
for music reproduction. The zones are defined as
indicated in the table. An additional Plena booster
amplifier is used for two-channel operation and as a
spare amplifier.
2.3.5 System configuration
The Plena units, needed to build the application, are
listed in table 2.6. The interconnections are shown in
figure 2.2.
table 2.4: Summary of requirements
Requirements
5 zones (typically up to 6 zones)
Speech intelligibility is the main priority
High power requirement in the noisy pool area
Fireman’s panel by fire exit
Call station in office/reception
Additional public address functions for
announcements
BGM
table 2.5: Power requirements per zone
Zone Description Power
1 Indoor pool area 5x30W horn
2 Children’s pool area 2x10W horn
3 Changing rooms 4x6W ceiling
4 Snack bar 4x6W cabinet
5 Office 2x6W cabinet
To t al 2 3 0 W
table 2.6: Used Plena units
Unit Description Number
LBB1990/00 Voice alarm controller 1x
LBB1996/00 Remote control panel 1x
LBB1956/00 Call station 1x
LBB1957/00 CS extension keypad 1x
LBB1935/00 240W booster 1x
LBB1961/00 BGM source 1x
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