Bosch Security Systems | 2008-09 | 9922 141 50762 en
Plena All-in-One 120 Watt
| Installation and User Instructions | Equipment
en
| 16
3.4.8
Loudspeakers
Loudspeakers are connected via screw terminals,
behind a removable plastic cover for safety. This Plena
System Amplifier has a very flexible output
configuration, allowing for different groups of
loudspeakers.
•
Connect 100 V-loudspeakers for zone 1 to the
100 V-/0-terminals of zone 1. The selection button
and the output attenuator for zone 1 (both on the
front panel) control this output. If a low impedance
loudspeaker is used for zone 1, connect it to the 8
Ohm- / 0-terminals of zone 1, but now the output
level will not be affected by the attenuator.
•
Proceed in the same way for zone 2.
•
Connect 100 V-loudspeakers that should receive
only priority announcements from microphone 1 to
the Call Only 100 V- /0-terminals. For this, the
priority mode must be enabled (see section 3.4.6).
The Call Active terminals provide voltage free relay
contacts. This contact is closed as long as a priority call
is active. This contact may be used for overriding
remote volume controls or other purposes. It is switched
together with the Call Only loudspeaker zone.
figure 3.10: Connecting loudspeakers
figure 3.11: Connecting loudspeakers
115/230V
F1
F2
+B
15L
T2.5L250V(230V~)
T5L250V(115V~)
LED
100V
70V
50V
35V
25V
18V
VU
8Ohm
8Ohm
8Ohm
Call/music
Call active
Call active
Call only
0
0
0
0
0
Call/music
0
0
0
0
8Ohm
0
0
Zone 1
Zone 2
0
0
0
100V
100V
100V
0V
100V
100V
70V
50V
35V
25V
18V
Switch
1
2
3
4
5
6
7
Off(0)
Mix
Mix
Chime
off
Speec
h filter
Phanto
m off
Phantom
off
Phanto
m off
Mic.
1 rear
1 front
1 rear
1
1 rear
2
3
On(1)
Priority
Vox
Chime
active
Flat
Phantom
on
Phantom
on
Phantom
on
100V
0 100V
0
100V
0
0
8
0
8
Call Onl
y
Zone 1
Call/BG
M
Zone 2
Call/BG
M
Call Act
ive
Warnin
g
Aux In
FM
Anten
na
Chime
Ducking
1 2 3 45
6 7
2
1
+
-
GND
3
1-
4
3
5
1
2
115V~
230V~
Apparatus
delivered
connecte
d for 230V
~
This app
aratus mu
st be earthe
d
Rated input
power: 400V
A
Line fuse
T2.5L250V
(230V~)
T5L250V(11
5V~)
3
CVBS
SDDI
F
Video output
B-Y
Y/C
Yc
R-Y
Call Only
100V
100V
0
0
0
0
0
8
W
8
W
8W
100V
100V
100V
0
0
0
0
0
8
W
8
W
Call Active
Zone 1 Call/BGM
Zone Call Only
Zone 1
Zone 2
100V
Zone 2 Call/BGM
Call Only
Call Active
Zone 1 Call/BGM
Zone 2 Call/BGM
Zone 1
Zone 2
Note
Ensure that the loudspeakers are wired in phase
by connecting the 0-terminals of the
loudspeakers in the same zone together to the
amplifier 0-terminall.
Caution
Connect 100 V-loudspeakers in the same zone
just in parallel, but take care that the total power
of the
loudspeakers, i.e. the load, does not exceed the
120 W power rating of this Plena unit.
Caution
It is not recommended to use both low
impedance loudspeakers and 100 V-
loudspeakers simultaneously. Multiple low
impedance loudspeakers should be connected
in series or parallel so that the total impedance
is more than 8 Ohms.
