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Plena Mixer Amplifier | Installation and User Instructions | Description
An LED meter monitors the master output before the
zone selection. This signal is also present on the
headphone connector below the output meter. For
total reliability and ease of use, a limiter is integrated
into the output stage to restrict output if the user
applies too much signal.
The unit has 24 VDC backup input with built in
24 VDC battery charger. A separate battery charger is,
therefore, not required. The charger charges the battery
with a 0.5 A constant current until the battery voltage
reaches 27.4 VDC. The charger then switches over to
constant voltage charging (also known as float charging).
CALL STATION
PTT
0
P hantom
Power
/
LINE
MIC
/
LINE
MIC
/
LINE
MIC
/
LINE
MIC
figure 2. 1 : Schematic overview of the Plena Mixer Amplifier
Bosch Security Systems | 2007-10 | PLE-2MA120-US, PLE-2MA240-US en
Note
When using the unit with backup power of 24 V,
make sure that the unit is always powered ON.
When the unit is switched OFF, the batteries will
be drained as this will be regarded as a power
source. Consequently the unit will revert to
24 VDC power from the 24 V input
Call Station Control
70 V
Amplifier
8 Ohm
IN
S
INS
O ut
In
C lic k
0
s uppressi
on
Bal. input
Zone 2
Music only / Line out
1
15 V,2 3 0 V
D.C.supply
CUSL
en | 8
C all O nly
0
0
0
0
Zone 1
0
Zone 1
2 01
Wall Panel input micro controller
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