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Bosch Security Systems | 2007-10 | PLE-2MA120-US, PLE-2MA240-US en
Plena Mixer Amplifier | Installation and User Instructions | Description en | 8
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).
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
figure 2.1: Schematic overview of the Plena Mixer Amplifier
INS
In
IN
Click
suppressi
Zone 2
on
S
Out
8Ohm
70 V
CallOnly
00
0
0
Bal. input
Music only / Line out
Amplifier
Zone 1
0
Zone 1
0
201
1
D.C.supply
15V,230V
CUSL
Wall Panel input micro controller
LINE
/
MIC
LINE
/
MIC
PTT
0
LINE/MIC
LINE/MIC
Phantom
Power
CALL STATION
Call Station Control