Line Output - Bosch Plena LBB1990/00 System Manual

Plena Voice Alarm System | Basic System Manual | Installation
To create a 3-wire volume override, see figure 3.11:
Note
It is not possible to use 3-wire volume override
in a basic system, because it must be enabled
using the configuration software. See the
Installation and User Instructions
(9922 141 1037x) and the Configuration
Software Manual (9922 141 1038x) for more
information.
Note
It is not possible to use 3-wire volume override
in combination with redundant loudspeaker lines
(line A and B, see figure 3.7). If redundant
loudspeaker lines are needed, use 4-wire
volume override (see figure 3. 1 0).
• Connect the 100V output of loudspeaker line A to
the 100 V input of the volume control.
• Connect the 100 V/0 V (CALL/RTN) of the
transformer to the 100V output of loudspeaker line
B.
• Connect the 0 output of loudspeaker line A to the
0 V of the loudspeaker.
• Enable 3-wire volume override in the configuration
software.
Caution
Make sure that the correct connections have
been made and the system is correctly
configured.
100V
A
100V
B
0V
A
figure 3. 1 1: 3-wire volume override
Bosch Security Systems | 2005-04 | 9922 141 10364en
3. 1 2

Line output

The voice alarm controller has one line output (see
figure 3.12). This output has a double cinch socket. Both
cinch sockets contain the same, mono signal, which
consists of the current BGM and calls. The line output
can be used to connect the voice alarm controller to a
recording device (e.g. a tape-deck).
LBB1990/00
Booster
figure 3. 1 2: Line output
en | 23
In
CD/Tuner