Bosch Plena Power Amplifier - Priority Input and Control Terminals

Bosch Security Systems | 2006-11 | 9922 141 50751en
Plena Power Amplifier | Installation and User Instructions | Amplifiers en | 14
3.5.3 Connecting the priority input and
using the control terminals
The power amplifier is provided with a balanced
priority input (Input 1-Priority) to connect to another
pre-amplifier or mixer.
Apply a control voltage of 2...24 V to the input 1
priority control terminals (20) to switch ON the priority
input (1) and mute the program input (4). A local music
source can be connected to the program input and a
remote emergency system to the priority input. The
emergency source must be able to supply the 2…24 V
control voltage to override the local music source. The
program input can be remotely controlled by using a
switch that is connected to the input 2 enable control
terminals (19).
Application example for use of the power amplifier
control terminals (see figure 3.8)
You can use up to 6 power amplifiers in combination
with the Plena LBB1925/10 System Pre-amplifier to
build a powerful multi-zone sound system. Zone
switching of BGM and calls is done via the LBB1925/10
zone relays in combination with the power amplifier
control terminals. The LBB1925/10 controls the
background music by distributing 24 Vdc via the music
zone relays to the input 2 enable control terminals (19).
The LBB1925/10 controls the calls by distributing 24
Vdc via the call zone relays to the input 1 priority
control terminals (20). Each power amplifier serves one
loudspeaker zone. Each zone can be OFF, or receive
music or a call.
figure 3.8: Priority input and control terminals
Priority Only No Priority
100 V 0 1 00 V 0
Priority Controlled Output
Off On
24V DCIn
Apparatus delivered
connectored for 230V~
Main Power
BatteryInput
Fault Relays' Output
NOCOM NC
Off On
NOCOM NC NO COM NC
Input1Priority
Loopthrough1
Input2Program
Loopthrough2
Input1Priority
2...24V - Input 1
0V- Input 2
Input2Enable
2..24V- E nable
0V- Mute
100V
0
Slav eI nput 100V
+
+
-
-
100V
0
70V
0
8ohm
100V/70V
Selection(12A)
PriorityOnly
0
0
NoPriority
Priority
F701
F702
Battery
Power
Detection
Pilot-tone
Detector
230V~ 240V~
Design& Quality
TheNe therlands
LBB1938/10
NL-4827HG-10
Plena480W PowerAmplifier
Max.o utput power 720W
Ratedoutput power 180W
230V~,50/60Hz
S/N.
8900 193 81001
A035413
Madein China
N663
Rated input
Power : 1600VA
Input1
Priority
SlaveInput
100V
Input2
Enable
100V 0
100V 70V008
Direct O utput
InputInput
Input2-P rogramInput1-P riority
2..24V
DefaultOff
GND 2..24V
DefaultOn
GND
Priority Only No Priority
100 V 0 1 00 V 0
Priority Controlled Output
Off On
24V DCIn
Apparatus delivered
connectored for 230V~
Main Power
BatteryInput
Fault Relays' Output
NOCOM NC
Off On
NOCOM NC NO COM NC
Input1Priority
Loopthrough1
Input2Program
Loopthrough2
Input1Priority
2...24V-Input1
0V- Input 2
Input2Enable
2..24V-Enable
0V- Mute
100V
0
Slav eI nput 100V
+
+
-
-
100V
0
70V
0
8ohm
100V/70V
Selection(12A)
PriorityOnly
0
0
NoPriority
Priority
F701
F702
Battery
Power
Detection
Pilot-tone
Detector
230V~ 240V~
Design& Quality
TheNetherlands
LBB1938/10
NL-4827HG-10
Plena480W PowerAmplifier
Max. output power 720W
Ratedoutput power 180W
230V~,50/60Hz
S/N.
8900 193 81001
A035413
Madein China
N663
Rated input
Power : 1600VA
Input1
Priority
SlaveInput
100V
Input2
Enable
100V 0
100V 70V008
Direct O utput
InputInput
Input2-P rogramInput1-P riority
2..24V
Defa ult O ff
GND 2..24V
DefaultOn
GND
3
Tel/EMG
0
L
R
1-
45
/Line
/Line
Trigger 1 Trigger 2
PCAudoln
1. Audio+
2.0V
3.Audio-
4.24Vd.c.
5. Allcall
6.Data-
7.Data+
8.Chs.GND
RS232
CD Aux
MasterOut Out
100V 0100V 0 100V 0 100V 0
100 V
115V 230V
Rated Input
Power : 50VA
T0.5L 250V
Apparatus delivered
connected for 230V-
0 100V 0 100V 0 100V 0
+24V- +24V-
This apparatus must be earthed
Warning
3
7
8
6
1
5
2
4
3 1
5
2
4
LBB1925/10
890019251005
115/230V~,50/60Hz
No.
3
1
+
-
2
GND
3
2
+
-
1
GND
LBB1925/10
1 4
20
19
20
19
Zone 1 output Zone 2 output
to next zones
1 4