32 en | System overview Plena Voice Alarm System
9922 141 1037x (V2.16) | V0.6 | 2011.09 Installation and Operation manual Bosch Security Systems B.V.
Power requirements
The system controller features a built-in 240 W power amplifier, making it possible to drive up
to 40 loudspeakers with a power handling capacity of 6 W each. This is sufficient for a
medium-sized high school with 24 classrooms, 4 toilets/changing rooms, a staff meeting room
and 2 offices, each requiring a single loudspeaker. The canteen, assembly hall, playing fields
and corridors typically require more loudspeakers per zone. An additional Plena Power
Amplifier is used as a spare amplifier.
Layout
See Figure 3.14, Table 3.1 and Table 3.2.
Table 3.1 Zones
Table 3.2 Units
Figure 3.14 Example of a school
Zone Description Power
Z1-22 Classrooms 22 x 6 W
Z23 Toilets/changing rooms 4 x 6 W
Z24 Staff meeting room 1 x 6 W
Z25-26 Offices 2 x 6 W
Z27 Corridors 4 x 6 W
Z28 Assembly hall 2 x 6 W
Z29 Lunch canteen 2 x 6 W
Z30 Playing fields 1 x 10 W
Total 232 W
Unit Description No.
LBB1990/00 Controller 1 x
LBB1992/00 Router 4 x
LBB1996/00 Remote control 1 x
LBB1997/00 Remote control extension 4 x
LBB1956/00 Call station 1 x
LBB1957/00 Call station keypad 4 x
LBB1935/00 Power Amplifier (240 W) 1 x
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