Bosch Plena Installation And User Instructions Manual page 36

Plena Voice Alarm System | Installation and User Instructions | Equipment
5.3.9 Mic/line input with VOX
functionality
The voice alarm controller has 1 mic/line input with
voice-activated (VOX) functionality (see figure 5.14).
This input has 2 sockets; a balanced XLR socket and a
balanced 6.3 mm jack socket. The signals from both
sockets are mixed to form a single input signal.
L
R
PC
figure 5. 1 4: Mic/line input with VOX functionality
Bosch Security Systems | 2006-06 | 9922 141 10377 en
The input automatically starts a business or emergency
call if the input is higher than -20 dB (100 mV for line
and 100 µV for microphone inputs) or if the VOX
switch is closed (see figure 5.15). The input must be
configured with the configuration software.
p
Calibration
GND
Mic/Lin
figure 5. 1 5: Connecting a VOX switch
For example, the mic/line input with VOX functionality
can be used to create a supervised link to another
emergency sound system (e.g. a Praesideo system).
Note
See the Configuration Software Manual
(9922 141 1038x) for more information about
the configuration software.
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24V
6
DC out
6
VOX Switch