Plena Mixer Amplifier | Installation and User Instructions | Important safeguards en | 2
Important safeguards
Before installing or operating this product, always read
the Safety Instructions, which are available as a separate
document (9922 141 7014x). These instructions are
supplied together with all equipment that can be
connected to the mains.
Thank you for choosing a Bosch Security Systems
product!
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
Plena Mixer Amplifier | Installation and User Instructions | Table of contents en | 3
Table of contents
Important safeguards ...................................................................................................................................................2
Table of contents ...........................................................................................................................................................3
2.1The Plena product range .......................................................................................................................................................7
2.2Contents of box .......................................................................................................................................................................7
2.4Controls, connectors and indicators ..................................................................................................................................9
3.1Unpack unit ............................................................................................................................................................................13
3.2Install unit in rack (optional) ............................................................................................................................................... 13
3.4Connect unit to mains ......................................................................................................................................................... 13
4. Connections and settings ........................................................................................................................................ 15
4.2.1Zone 1 and 2 ...................................................................................................................................................................21
4.2.2Call only ............................................................................................................................................................................ 21
4.2.3Music only ........................................................................................................................................................................21
4.2.4Line out/ loop through ...................................................................................................................................................21
4.3.2Pin settings and labelling ..............................................................................................................................................25
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
Plena Mixer Amplifier | Installation and User Instructions | Table of contents en | 4
5.1Switch on and off ................................................................................................................................................................. 27
5.1.1Switch on .........................................................................................................................................................................27
5.1.2Switch off .........................................................................................................................................................................27
5.3.2Volume control ................................................................................................................................................................ 28
5.4Tone control ..........................................................................................................................................................................28
5.4.2Microphone/line tone control ....................................................................................................................................... 28
5.4.3Music tone control .......................................................................................................................................................... 28
5.5.2Master volume control ...................................................................................................................................................29
6. Technical data ............................................................................................................................................................. 31
6.1.1Mains power supply .......................................................................................................................................................31
6.1.2Battery power supply .....................................................................................................................................................31
6.1.5RJ-45 input 2 x ................................................................................................................................................................31
6.1.6Mic/line input 6 x ............................................................................................................................................................. 31
6.1.8Emergency / telephone 1 x ..........................................................................................................................................32
6.1.9Loop through insert 1 x .................................................................................................................................................32
6.1.10 Master/music output 1 x ...............................................................................................................................................32
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
Plena Mixer Amplifier | Installation and User Instructions | Introduction en | 5
1Introduction
1.1 Purpose
The purpose of these Installation and User Instructions
is to provide information required for installing,
configuring and operating a Plena Mixer Amplifier.
1.2 Digital document
These Installation and User Instructions are also
available as a digital document in the Adobe Portable
Document Format (PDF).
1.3 Intended audience
These Installation and User Instructions are intended
for installers and users of a Plena system.
1.4 Related documentation
Safety Instructions (9922 141 1036x).
1.5 Alerts
Four types of alerts are used in this manual. The alert
type is closely related to the effect that may be caused if
it is not observed. These alerts - from least severe effect
to most severe effect - are:
• Note
Alert containing additional information. Usually, not
observing a note alert does not result in damage to
the equipment or personal injuries.
• Caution
The equipment can be damaged if the alert is not
observed.
• Warning
Persons can be (severely) injured, or the equipment
can be seriously damaged, if the alert is not
observed.
• Danger
Not observing the alert can result in death.
1.6 Icons
1.6.1Note icons
The icons used in combination with Notes provide extra
information about the Note. See the following
examples:
Note
General icon for notes.
Note
Consult the indicated source of information.
1.6.2Caution, Warning, and Danger
icons
The icons used in combination with Caution, Warnings,
and Dangers indicate the type of hazard present. See the
following examples:
Caution, Warning, Danger
General icon for Cautions, Warnings and
Dangers.
Caution, Warning, Danger
Icon for risk of electric shock.
Caution, Warning, Danger
Icon for risk of electrostatic discharge.
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
Plena Mixer Amplifier | Installation and User Instructions | Introduction en | 6
1.7 Conversion tables
In this manual, SI units are used to express lengths,
masses, temperatures etc. These can be converted to
non-metric units using the following information.
table 1.1: Conversion of units of length
1 in =25.4 mm1 mm =0.03937 in
1 in =2.54 cm1 cm =0.3937 in
1 ft =0.3048 m1 m =3.281 ft
1 mi =1.609 km1 km =0.622 mi
table 1.2: Conversion of units of mass
1 lb =0.4536 kg1 kg =2,2046 lb
table 1.3: Conversion of units of pressure
1 psi =68.95 hPa1 hPa =0.0145 psi
Note
1 hPa = 1 mbar.
table 1.4: Conversion of units of temperature
° F = 9 . ( ° C + 32)° C = 5 . ( ° F 32)
° F = 5° C = 9
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
Plena Mixer Amplifier | Installation and User Instructions | Description en | 7
2Description
2.1 The Plena product range
The Plena Mixer Amplifier is part of the Plena product
range. Plena provides public address solutions for places
where people gather to work, worship, trade, or relax. It
is a family of system elements that are combined to
create public address systems tailored for virtually any
application
The Plena product range includes:
•mixers
• preamplifiers
• power amplifiers
• a music source unit
• a digital message manager
• a feedback suppressor
• call stations
• an All-in-One system
• a voice alarm system
•a timer
• a charger
• a loop amplifier
The various elements are designed to complement each
other thanks to matched acoustical, electrical and
mechanical specifications.
The volume of each microphone/line signal can be
individually adjusted to obtain the required mix; the
mixed output is controlled via the master volume
control and separate high/low tone controls.
The unit is easy to use, and provides a crisp call or clear
music. The amplifier also has enhanced features such as
ducking level control, priority, labelling, and setting
indicators.
All Microphone/line inputs can be switched between
microphone level and line level sensitivity. The inputs
are balanced but can also be used unbalanced. Phantom
power can be selected via a DIP switch to provide
power to condenser microphones. Input channels 1 and
2 can take priority over all other microphone and music
inputs:
• Input 1 can be activated by contact closure on a PTT
(push to talk). A chime can be configured to precede
an announcement.
• Input 2 can be switched automatically if a signal is
available at the input, for example. if someone
speaks into the microphone (VOX activation).
A telephone/100 V emergency input with VOX
activation is also provided for easy integration with
another PA system or a telephone paging system. It has
its own volume control and overrides all other inputs,
including the call station and inputs 1 and 2.
2.2 Contents of box
The packaging box contains the following contents:
• PLE-2MA120-EU, or PLE-2MA240-EU
• Labels and colored pins for indicating favorite
settings
•Power cord
• Plena Bonus CD
• Mounting brackets (LBC 1901/00)
2.3 The Plena Mixer Amplifier
The Plena Mixer Amplifier is a high performance,
professional public address unit for mixing up to six
separate microphone/line signals, and any one of three
separate music signals. For a schematic overview of the
Plena Mixer Amplifier, see figure 2.1 on the next page.
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
The unit also has a line output to add amplifiers for
larger systems that require more output power. This
output can be switched to music only, for example, so
that music on hold can be provided for the telephone
system. Loop through input and output connections
enable external sound processing equipment (for
example, an equalizer or Plena feedback suppressor) to
be connected between the preamplifier and the power
amplifier stages. A feedback suppressor can ensure
feedback-free, clear speech for all microphones.
Users can create custom labels for inputs, music sources,
and output zones. These labels can be attached to the
special holders at the front of the mixer amplifier.
Colored pins can also be inserted at various positions
around the volume and tone dial controls to indicate
favorite settings for a particular application.
Plena Mixer Amplifier | Installation and User Instructions | Description en | 8
y
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.
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
The unit has 24 VDC backup input with built in
24 VDC battery charger. A separate battery charger is,
source. Consequently the unit will revert to
24 VDC power from the 24 V input
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
XLR+Ph
LINE/MIC
LINE/MIC
LINE
Powe r
/MIC
Phantom
Call Station Control
INSInIN
S
Out
Music only / Line out
Bal. input
D.C.supply
Amplifier
Click
suppressi
CUSL
0
100 V
8Ohm
Zone 2
1
15V, 230 V
0
Wall Panel input micro controller
on
Call Onl
00
0
Zone 1
0
Zone 1
201
figure 2.1: Schematic overview of the Plena Mixer Amplifier
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
Plena Mixer Amplifier | Installation and User Instructions | Description en | 9
2.4 Controls, connectors and
indicators
2.4.1Front panel
See figure 2.2 for an overview of the controls and
indicators.
1 Power button.
2 Label holder for user-defined description of
microphone/line inputs - custom labels can be
created by user.
3 Master high tone control for microphone/line inputs.
4 Label holder for user-defined description of music
sources - custom labels can be created by user.
5 Master high tone control for music inputs.
6 Label holder for user-defined description of zone
names - custom labels can be created by user.
7 Master volume control - controls all inputs except
10 Master low tone control for microphone/line inputs.
11 Music source selector (for music inputs 1, 2, and 3).
12 Music source volume control.
13 Master low tone control for music inputs.
14 Zone 1 selection button.
15 Zone 2 selection button
16 Air inlet holes.
Note
Do not obstruct the airflow into the unit.
17 Headphone socket.
Note
Users can create custom labels for the:
microphone/line inputs, description of the music
sources, and audio output zones 1 and 2. These
labels can be attached to the mixer amplifier at
position numbers 2, 4, and 6 (see figure 2.2).
Colored pins can also be inserted at various
positions around the dial controls to indicate the
favorite settings for a particular application. For
more information on inserting and removing
pins, see section 4.3.2.
2.4.2Plena PLE-WP2Z3S wall panel
The optional Plena PLE-WP2Z3S wall panel can be
used to remotely control the unit from a maximum of
four remote locations. The appearance of the wall panel
is matched to the Bosch loudspeaker volume controls.
The zone can be activated or deactivated, and the music
source can be easily changed. The status of each zone
and music source is indicated by an LED.
A standard CAT 5 cable is used to connect the wall
panel to the mixer-amplifier. The maximum distance is
200 m. Please refer to the relevant datasheet for more
information.
1
91110121314151716
2354
figure 2.2: Front panel
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
678
B
Plena Mixer Amplifier | Installation and User Instructions | Description en | 10
2.4.3Rear panel
See figure 2.3 for an overview of the connectors and
switches:
1 Cooling fan.
Note
Always allow adequate space at the rear of the
unit for ventilation.
2 Microphone/line 1 input, XLR connector - DIP
switch settings for: chime, PTT (push to talk),
mic/line, speech filter, and phantom power (see
number 4). Input is wired in parallel with
microphone/line 1, Euro style pluggable screw
terminal connector (see number 3).
3 Microphone/line 1 input with trigger, Euro style
pluggable screw terminal connector - DIP switch
settings for: chime, PTT (push to talk), mic/line,
speech filter, and phantom power (see number 4).
Input is wired in parallel with microphone/line 1,
XLR connector (see number 2).
4 DIP switch for microphone/line 1 and microphone/
line 2 (see numbers 2 and 3, and 5 respectively).
5 Microphone/line 2 input, XLR connector - DIP
switch settings for speech filter, mic/line, VOX, and
phantom power (see number 4).
6 Microphone/line 3 input, XLR connector - DIP
switch settings for mic/line, and phantom power
(see number 7).
7 DIP switch for microphone/line 3 and microphone/
line 4 (see numbers 6 and 8 respectively).
8 Microphone/line 4 input, XLR connector - DIP
switch settings for mic/line, and phantom power
(see number 7).
9 Microphone/line 5 input, XLR connector - DIP
switch settings for mic/line, and phantom power
(see number 10).
10 DIP switch for microphone/line 5 and microphone/
line 6 (see numbers 9 and 11 respectively).
11 Microphone/line 6 input, XLR connector - DIP
switch settings for mic/line, and phantom power
(see number 10).
12 Mains voltage switch, C13 - 115/230
VAC 50/60 Hz.
13 Tel. emergency/100V input, Euro style pluggable
screw terminal connector - VOX function. This input
has highest priority.
14 Call station input, RJ-45 connector - PLE-2CS or
PLE-2CS-MM, chimes are in call station. This input
has second highest priority.
15 Remote control wall-panel-input, RJ-45 connector.
Wall panel incorporates: BGM source selection, and
zone on/off control.
16 Telephone emergency/100V input volume control -
control range -25 dB to 0dB (see number 13).
17 Chime volume control for microphone/line input 1
(see numbers 2 and 3).
18 Ducking level control for microphone/line inputs 1
and 2 and call stations.
19 Music input (number 1 disc), 2x RCA/cinch
connectors. Stereo, summed mono.
20 Music input (number 2 radio), 2x RCA/cinch
connectors. Stereo, summed mono.
21 Music input (number 3 auxiliary), 2x RCA/cinch
connectors. Stereo, summed mono.
22 Pre-out, amp in insert, 2x RCA/cinch connector -
can be used for EQ or feedback suppressor.
23 Master switch for line out or music (see number 24).
24 Music master output, XLR connector - switch setting
for line out, or music only (see number 23).
25 Outputs and 24 VDC in/out:
•Zone 1 output, Euro style pluggable screw terminal
connector - 100 V, and 8 Ohm.
•Zone 2 output, Euro style pluggable screw terminal
connector - 100 V, and 8 Ohm.
• Call only, Euro style pluggable screw terminal
connector 100 V.
• 24 VDC in/out:
• Input: 24 VDC backup power.
• Output: built in charger, maximum 0.5 A.
regulated output current. If battery charging is
not required, output can be used for volume
overrides or other purposes.
26 Mains fuse.
27 Earth connection screw.
Note
The unit must be earthed.
28 Mains connector (3-pole).
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
Plena Mixer Amplifier | Installation and User Instructions | Description en | 11
125689111210743
28272625222120191817161513142423
figure 2.3: Rear panel
Bosch Security Systems | 2007-10 | PLE-2MA120-EU, PLE-2MA240-EU en
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