Operating instructions
Bosch Security Systems | 2003-09 | 9922 141 50502en
Plena Message Manager | Installation and Operating Manual | en | 14
The message manager can be used with all Plena amplifiers via the Cinch output (4) or the XLR Output (6). The
level of the messages can be set via the message volume control (2).
To fully benefit from the features of the message manager in the overall Plena system (e.g. to distribute pre-recorded
messages to pre-programmed zones) the unit must be connected via the system pre-amplifier LBB1925. To do this,
use the RS232 cable and the audio cable supplied.
There are several ways to connect the message manager to the system pre-amplifier:
- Connecting the Cinch output (4) of the message manager to the Cinch PC Audio In (R) line input of the sys-
tem pre-amplifier, as shown in figure 3.2 (in which the LBB1961 functions as a BGM source).
- Connecting the XLR output (6) of the message manager to the points 1 and 3 of the 8-pole DIN socket of the
system pre-amplifier.
3.3 Loopthrough audio connections
Figure 3.3
It is possible to connect the LBB1965 message manager between a mixer pre-amplifier and a power amplifier.
When the message manager is not active, the mixer pre-amplifier is routed to the power amplifier. However, when
the message manager becomes active, this loopthrough connection is interrupted and the message manager is
switched to the power amplifier.
Figure 3.3 shows this configuration example in which the Plena Mixer Pre-amplifier LBB1920 is used with a Plena
Power Amplifier LBB1938. This is a high priority application, as the message manager has absolute priority.
External settings and connections
LB B1920
3
1-
45
3
1/Line 2/Line
3/Line
1-
45
115V 230V
Apparatus delivired
connected for 230V-
This apparatus must be earthed
Warning
3
1
+
-
2
GND
3
2
+
-
1
GND
Dir.Out1 Dir.Out2 Dir.Out3 Dir.Out4 Ins/ Casc / Emgln Ins/ Casc Out Master Line Out Master Mic. Out
Rated input
power: 25VA
T0,5AL250V
4/Line
3
1-
4
Ins/Casc
5
EMG Out
3
1-
45
3
1-
L
R
+24V- +24V-
45
LBB 1 920/00
8900 192 00005
115/230V~,50/60Hz
No.
DC In DC Out
3 1
5
2
4
LBB1965
+
Pilot Message
Tone
Loop through
Supervision
Pilottone
Msg Active Trigger Input
RS232 to LBB1925
Rated Input
Power:50VA
To.5L250V
RS232 to PC
WK
S/N
Mains
OFF
NC NO
NO123456 891011127CNC24V
Fault GND
C
ON
Trigger Input 1-6
12345678
In
In
Out
Out
LBB 1965/00
8900 196 5005
230V~ 50/60Hz
Apparatus delivered connected for
230V~
This apparatus must be earthed
Warning
This apparatus must be earthed
Warning
LBB1938
Input 1
Priority
Slave Input
100V
Input 2
Enable
100V 0
Priority O nly N o Priority
100V 70V008
100V 100V00
Direct O utput
Input
Loopthrough Loopthrough
Input
Input 2-ProgramInput 1-Priority
2..24V
Default Off
GND 2..24V
Default On
GND
100V
0
70V
0
8ohm
100V/70V
Priority O nly
0
0
No Priority
Priority
Input1 Priority
Loopthrough 1
Input2 Program
Loopthrough 2
Input1 Priority
2..24V-Input1
0V-Input 2
Input2 Enable
2..24V-Enable
0V-Mute
100V
0
SlaveInput 100V
+
-
+
-
Priority Controlled O utput