Bosch Appliances Car Amplifier PLE 2MA240 US User Manual

Plena Mixer Amplifier  
Installation and User Instructions  
en PLE-2MA120-US  
PLE-2MA240-US  
Plena Mixer Amplifier | Installation and User Instructions | Important safeguards  
en | 3  
outlet, contact your electrician to replace your  
obsolete outlet. Do not defeat the safety purpose of  
the grounding-type lug.  
perform safety checks to determine that the unit is in  
proper operating condition.  
21 Lightning - For added protection of the units during  
a lightning storm, or when it is left unattended and  
unused for long periods of time, unplug it from the  
wall outlet and disconnect the cable system. This will  
prevent damage to the unit due to lightning and  
power-line surges.  
22 Disconnection - To completely disconnect this unit  
from the AC mains, disconnect the power supply  
cord plug from the AC receptacle. The mains plug of  
the power supply cord shall remain readily operable  
to be able to disconnect power from the unit.  
23 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.  
14 Power-Cord Protection - Power supply cords should  
be routed so that they are not likely to be walked on  
or pinched by items placed upon or against them,  
paying particular attention to cords and plugs,  
convenience receptacles, and the point where they  
exit from the appliance.  
15 Overloading - Do not overload outlets and extension  
cords as this can result in a risk of fire or electrical  
shock.  
16 Object and Liquid Entry - Never push objects of any  
kind into this unit through openings as they may  
touch dangerous voltage points or short-out parts  
that could result in a fire or electric shock. Never  
spill liquid of any kind on the unit.  
17 Servicing - Do not attempt to service this unit  
yourself as opening or removing covers may expose  
to dangerous voltage or other hazards. Refer all  
servicing to qualified service personnel.  
18 Damage Requiring Service - Unplug the unit from  
the outlet and refer servicing to qualified service  
personnel under the following conditions:  
When the power-supply cord or plug is damaged.  
If liquid has been spilled, or objects have fallen  
into the unit.  
If the unit has been exposed to rain or water.  
If the unit does not operate normally by following  
the instructions for use. Adjust only those  
controls that are covered by the instructions for  
use, as an improper adjustment of other controls  
may result in damage and will often require  
extensive work by a qualified technician to  
restore the units to their normal operation.  
If the unit has been dropped or the unit has been  
damaged.  
When the unit exhibits a distinct change in  
performance; this indicates a need for service.  
19 Replacement Parts - When replacement parts are  
required be sure the service technician has used  
replacement parts specified by the manufacturer or  
parts which have the same characteristics as the  
original part. Unauthorised substitutions may result  
in fire, electric shock or other hazards.  
20 Safety Check - Upon completion of any service or  
repairs to the units, ask the service technician to  
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Plena Mixer Amplifier | Installation and User Instructions | Important safeguards  
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American Users  
Canadian Users  
Note  
Note  
This equipment has been tested and found to  
comply with the limits for a Class B digital  
device, pursuant to part 15 of the FCC rules.  
These limits are designed to provide reasonable  
protection against harmful interference in a  
residential installation.  
This equipment generates, uses, and can  
radiate radio frequency energy and, if not  
installed and used in accordance with the  
instructions, may cause harmful interference to  
radio communications. However, there is no  
guarantee that interference will not occur in a  
particular installation. If this equipment does  
cause harmful interference to radio or television  
reception, which can be determined by turning  
the equipment OFF and ON, the user is  
encouraged to try to correct the interference by  
one or more of the following measures:  
This Class B digital device complies with  
Canadian ICES-003.  
Cet appareil numérique de classe B est  
conforme à la norme NMB-003 du Canada.  
Thank you for choosing a Bosch Security Systems  
product!  
Reorient or relocate the receiving antenna.  
Increase the separation between the  
equipment and the receiver.  
Connect the equipment into an outlet on a  
circuit different from that to which the  
receiver is connected.  
Consult the dealer or an experienced  
radio/TV technician for help.  
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Plena Mixer Amplifier | Installation and User Instructions | Table of contents  
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Table of contents  
Important safeguards...................................................................................................................................................2  
Table of contents...........................................................................................................................................................3  
1. Introduction ....................................................................................................................................................................5  
1.1 Purpose .....................................................................................................................................................................................5  
1.2 Digital document .....................................................................................................................................................................5  
1.3 Intended audience ..................................................................................................................................................................5  
1.4 Related documentation ..........................................................................................................................................................5  
1.5 Alerts ..........................................................................................................................................................................................5  
1.6 Icons ...........................................................................................................................................................................................5  
1.6.1 Note icons ...........................................................................................................................................................................5  
1.6.2 Caution, Warning, and Danger icons ...........................................................................................................................5  
1.7 Conversion tables ...................................................................................................................................................................6  
2. Description .....................................................................................................................................................................7  
2.1 The Plena product range .......................................................................................................................................................7  
2.2 Contents of box .......................................................................................................................................................................7  
2.3 The Plena Mixer Amplifier ......................................................................................................................................................7  
2.4 Controls, connectors and indicators ..................................................................................................................................9  
2.4.1 Front panel ..........................................................................................................................................................................9  
2.4.2 Plena PLE-WP2Z3S wall panel .....................................................................................................................................9  
2.4.3 Rear panel ........................................................................................................................................................................ 10  
3. Installation ................................................................................................................................................................... 13  
3.1 Unpack unit ............................................................................................................................................................................ 13  
3.2 Install unit in rack (optional) ............................................................................................................................................... 13  
3.3 Check settings/connections .............................................................................................................................................. 13  
3.4 Connect unit to mains ......................................................................................................................................................... 13  
4. Connections and settings ........................................................................................................................................ 15  
4.1 Connecting inputs ................................................................................................................................................................ 15  
4.1.1 DC supply (battery) ........................................................................................................................................................ 15  
4.1.2 Priority microphone (input 1) ....................................................................................................................................... 16  
4.1.3 Secondary microphone (input 2) ................................................................................................................................ 17  
4.1.4 Additional microphones (inputs 3 through 6) .......................................................................................................... 17  
4.1.5 Emergency inputs ........................................................................................................................................................... 18  
4.1.6 Music source inputs ....................................................................................................................................................... 20  
4.2 Connecting outputs ............................................................................................................................................................. 21  
4.2.1 Zone 1 and 2 ................................................................................................................................................................... 21  
4.2.2 Call only ............................................................................................................................................................................ 21  
4.2.3 Music only ........................................................................................................................................................................ 21  
4.2.4 Line out/ loop through ................................................................................................................................................... 21  
4.2.5 Connecting speakers ..................................................................................................................................................... 22  
4.3 Unit settings .......................................................................................................................................................................... 23  
4.3.1 Rear panel settings ........................................................................................................................................................ 23  
4.3.2 Pin settings and labelling .............................................................................................................................................. 25  
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Plena Mixer Amplifier | Installation and User Instructions | Table of contents  
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5. Operation ..................................................................................................................................................................... 27  
5.1 Switch on and off ................................................................................................................................................................. 27  
5.1.1 Switch on ......................................................................................................................................................................... 27  
5.1.2 Switch off ......................................................................................................................................................................... 27  
5.2 Microphone/line controls .................................................................................................................................................... 28  
5.3 Music controls ....................................................................................................................................................................... 28  
5.3.1 Source selection ............................................................................................................................................................. 28  
5.3.2 Volume control ................................................................................................................................................................ 28  
5.4 Tone control .......................................................................................................................................................................... 28  
5.4.1 Introduction ...................................................................................................................................................................... 28  
5.4.2 Microphone/line tone control ....................................................................................................................................... 28  
5.4.3 Music tone control .......................................................................................................................................................... 28  
5.5 Output controls ..................................................................................................................................................................... 29  
5.5.1 Zone selection ................................................................................................................................................................. 29  
5.5.2 Master volume control ................................................................................................................................................... 29  
6. Technical data ............................................................................................................................................................. 31  
6.1 Electrical ................................................................................................................................................................................. 31  
6.1.1 Mains power supply ....................................................................................................................................................... 31  
6.1.2 Battery power supply ..................................................................................................................................................... 31  
6.1.3 Power consumption ....................................................................................................................................................... 31  
6.1.4 Performance .................................................................................................................................................................... 31  
6.1.5 RJ-45 input 2 x ................................................................................................................................................................ 31  
6.1.6 Mic/line input 6 x ............................................................................................................................................................. 31  
6.1.7 Music inputs 3x ............................................................................................................................................................... 32  
6.1.8 Emergency / telephone 1 x .......................................................................................................................................... 32  
6.1.9 Loop through insert 1 x ................................................................................................................................................. 32  
6.1.10 Master/music output 1 x ............................................................................................................................................... 32  
6.1.11 Loudspeaker outputs 70 V, 25 V* .............................................................................................................................. 32  
6.1.12 Loudspeaker output 4 Ohm* ....................................................................................................................................... 32  
6.2 Mechanical ............................................................................................................................................................................. 32  
6.3 Environmental ........................................................................................................................................................................ 32  
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Plena Mixer Amplifier | Installation and User Instructions | Introduction  
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1
Introduction  
1.6  
Icons  
1.6.1 Note icons  
1.1  
Purpose  
The icons used in combination with Notes provide extra  
information about the Note. See the following  
examples:  
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  
Note  
These Installation and User Instructions are also  
available as a digital document in the Adobe Portable  
Document Format (PDF).  
General icon for notes.  
1.3  
Intended audience  
Note  
These Installation and User Instructions are intended  
for installers and users of a Plena system.  
Consult the indicated source of information.  
1.4  
Related documentation  
1.6.2 Caution, Warning, and Danger  
icons  
Safety Instructions (9922 141 1036x).  
The icons used in combination with Caution, Warnings,  
and Dangers indicate the type of hazard present. See the  
following examples:  
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:  
Caution, Warning, Danger  
General icon for Cautions, Warnings and  
Dangers.  
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.  
Caution, Warning, Danger  
Icon for risk of electric shock.  
Warning  
Persons can be (severely) injured, or the equipment  
can be seriously damaged, if the alert is not  
observed.  
Caution, Warning, Danger  
Icon for risk of electrostatic discharge.  
Danger  
Not observing the alert can result in death.  
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Plena Mixer Amplifier | Installation and User Instructions | Introduction  
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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 =  
1 in =  
1 ft =  
1 mi =  
25.4 mm  
2.54 cm  
0.3048 m  
1.609 km  
1 mm =  
1 cm =  
1 m =  
0.03937 in  
0.3937 in  
3.281 ft  
1 km =  
0.622 mi  
table 1.2: Conversion of units of mass  
1 lb = 0.4536 kg 1 kg =  
2,2046 lb  
0.0145 psi  
table 1.3: Conversion of units of pressure  
1 psi = 68.95 hPa 1 hPa =  
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  
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Plena Mixer Amplifier | Installation and User Instructions | Description  
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2
Description  
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.  
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.  
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:  
The Plena product range includes:  
mixers  
power amplifiers  
a music source unit  
a digital message manager  
a feedback suppressor  
call stations  
Input 1 can be activated by contact closure on a PTT  
(push to talk). A chime can be configured to precede  
an announcement.  
an All-in-One system  
a timer  
Input 2 can be switched automatically if a signal is  
available at the input, for example. if someone  
speaks into the microphone (VOX activation).  
The various elements are designed to complement each  
other thanks to matched acoustical, electrical and  
mechanical specifications.  
A telephone/70 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-US, or PLE-2MA240-US  
Labels and colored pins for indicating favorite  
settings  
Power cord  
Plena Bonus CD  
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.  
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.  
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.  
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Plena Mixer Amplifier | Installation and User Instructions | Description  
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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  
source. Consequently the unit will revert to  
24 VDC power from the 24 V input  
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 Control  
CALL STATION  
C all O nly  
0
0
0
0
PTT  
0
Zone  
1
1
70 V  
Amplifier  
0
INS INS  
O ut In  
8
Ohm  
0
Zone  
C lick  
s uppressi on  
LINE /MIC  
Bal. input  
Zone  
2
Music only / Line out  
LINE /MIC  
LINE /MIC  
201  
115V,23 0V  
LINE /MIC  
D.C.supply  
CUSL  
Wall Panel input micro controller  
figure 2.1: Schematic overview of the Plena Mixer Amplifier  
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Plena Mixer Amplifier | Installation and User Instructions | Description  
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2.4  
Controls, connectors and  
indicators  
16 Air inlet holes.  
2.4.1 Front panel  
Note  
See figure 2.2 for an overview of the controls and  
Do not obstruct the airflow into the unit.  
indicators.  
1 Power button.  
17 Headphone socket.  
2 Label holder for user-defined description of  
microphone/line inputs - custom labels can be  
created by user.  
Note  
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  
emergency and call station.  
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.  
8 Output level meter (-18 db, 0 db)  
9 Input level control:  
microphone/line 1  
microphone/line 2  
microphone/line 3  
microphone/line 4  
microphone/line 5  
microphone/line 6  
2.4.2 Plena 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.  
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.  
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.  
15 Zone 2 selection button.  
1
2
3
4
5
6
7
8
B
9
10  
11  
12  
13  
14  
15  
16  
17  
figure 2.2: Front panel  
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Plena Mixer Amplifier | Installation and User Instructions | Description  
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2.4.3 Rear panel  
See figure 2.3 for an overview of the connectors and  
14 Remote control wall-panel-input, RJ-45 connector.  
switches:  
Wall panel incorporates: BGM source selection, and  
zone on/off control.  
1 Cooling fan.  
15 Telephone emergency/70V input volume control -  
control range -25 dB to 0dB (see number 12).  
16 Chime volume control for microphone/line input 1  
(see number 2).  
Note  
17 Ducking level control for microphone/line inputs 1  
and 2 and call stations.  
Always allow adequate space at the rear of the  
unit for ventilation.  
18 Music input (number 1 disc), 2x RCA/cinch  
connectors. Stereo, summed mono.  
19 Music input (number 2 radio), 2x RCA/cinch  
connectors. Stereo, summed mono.  
20 Music input (number 3 auxiliary), 2x RCA/cinch  
connectors. Stereo, summed mono.  
21 Pre-out, amp in insert, 2x RCA/cinch connector -  
can be used for EQ or feedback suppressor.  
22 Master switch for line out or music (see number 23).  
23 Music master output, XLR connector - switch setting  
for line out, or music only (see number 22).  
24 Outputs and 24 VDC in/out:  
2 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 3).  
3 DIP switch for microphone/line 1 and microphone/  
line 2 (see numbers 2 and 4 respectively).  
4 Microphone/line 2 input, 3 pin Euro style pluggable  
screw terminal connector - DIP switch settings for  
speech filter, mic/line, VOX, and phantom power  
(see number 3).  
5 Microphone/line 3 input, 3 pin Euro style pluggable  
screw terminal connector - DIP switch settings for  
mic/line, and phantom power (see number 6).  
6 DIP switch for microphone/line 3 and microphone/  
line 4 (see numbers 5 and 7 respectively).  
7 Microphone/line 4 input, 3 pin Euro style pluggable  
screw terminal connector - DIP switch settings for  
mic/line, and phantom power (see number 6).  
8 Microphone/line 5 input, 3 pin Euro style pluggable  
screw terminal connector - DIP switch settings for  
mic/line, and phantom power (see number 9).  
9 DIP switch for microphone/line 5 and microphone/  
line 6 (see numbers 8 and 10 respectively).  
10 Microphone/line 6 input, 3 pin Euro style pluggable  
screw terminal connector - DIP switch settings for  
mic/line, and phantom power (see number 9).  
11 Mains voltage switch, C13 - 115/230  
Zone 1 output, Euro style pluggable screw terminal  
connector - 70 V, 25 V and 4 Ohm.  
Zone 2 output, Euro style pluggable screw terminal  
connector - 70 V, 25 V and 4 Ohm.  
Call only, Euro style pluggable screw terminal  
connector 70 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.  
25 Mains fuse.  
26 Ground connection screw.  
VAC 50/60 Hz.  
Note  
The unit must be earthed.  
12 Tel. emergency/70V input, Euro style pluggable  
screw terminal connector - VOX function. This input  
has highest priority.  
27 Mains connector (3-pole).  
13 Call station input, RJ-45 connector - PLE-2CS or  
PLE-2CS-MM, chimes are in call station. This input  
has second highest priority.  
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Plena Mixer Amplifier | Installation and User Instructions | Description  
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1
2
3
4
5
6
7
8
9
10  
11  
F01U.066.938  
Rated input  
power: 40VA  
PLE-10M2-EU  
Channel Mixer  
115/230V~, 50/60Hz  
S/N  
8900 192 21001  
2
Apparatus delivered  
connected for 230V~  
Call  
Trigger  
Line fuse  
Gnd  
T1L250V for 230V  
T1.6L250V for 115V  
Design Quality  
&
The Netherlands  
PLE-2CS  
In  
Chime  
Ducking  
Telephone/Emergency Input  
100V  
0
Gnd  
Line Music  
Out Only  
Mix  
Mute  
Out  
Insert  
Wall Panel  
Zone 1 Out  
Zone 2 Out  
Output  
1(disc)  
2(radio)  
3(aux)  
12  
13 14 15 16 17 18 19 20 21 22  
23  
24  
25  
26  
27 28 29  
figure 2.3: Rear panel  
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Plena Mixer Amplifier | Installation and User Instructions | Description  
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Intentionally left blank  
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Plena Mixer Amplifier | Installation and User Instructions | Installation  
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3
Installation  
3.3  
Check settings/connections  
1 Connect any additional equipment (see section 4.1  
and 4.2).  
3.1  
Unpack unit  
2 Check the settings (see section 4.3).  
1 Remove the unit from the box, and discard the  
packaging material according to local regulations.  
2 Use your fingernails to carefully peel off the  
protective plastic film from the label holders. Do not  
use sharp or pointed objects.  
3.4  
Connect unit to mains  
Caution  
Potential equipment damage. Before  
connecting power, always check the voltage  
selector on the rear panel of the unit.  
3.2  
Install unit in rack (optional)  
The Plena Mixer Amplifier is intended for tabletop use,  
but you can also mount the unit in a 19" rack  
(see figure 3.1).  
1 Make sure the voltage selector (115V/ 230V) is  
correctly set for the country’s main voltage (see  
figure 3.2).  
2 Make sure the power switch on the front of the unit  
is set to Off.  
If you mount the unit in a rack, you must:  
ensure that it does not exceed the overheating  
temperature (55 °C ambient).  
use the included Bosch mounting brackets  
(LBC 1901/00).  
3 Connect the power cord to the mains connector and  
plug it into the mains outlet.  
remove the 4 feet from the bottom of the unit.  
1
B
figure 3.1: Installing the unit in a rack  
figure 3.2: Power connection and voltage selector  
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4
Connections and settings The Plena Mixer Amplifier has as a built in charger,  
which charges the connected battery (or batteries if  
connected in series). 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).  
This means that a battery can be charged at the same  
rate it is discharging, and thus full capacity battery can  
be assured.  
4.1  
Connecting inputs  
4.1.1 DC supply (battery)  
Caution  
The connection cable must have an in-line fuse.  
Use the type of fuse shown in the following  
figure.  
This type of charging is suited for low duty-cycle  
applications where a relatively high current or power is  
infrequently required.  
Caution  
Make sure the unit is grounded.  
Note  
If battery charging is not required, the 0.5 A  
maximum output current can be used for volume  
overrides or other purposes instead.  
The Plena Mixer Amplifier has a 24 VDC input  
(terminal screw). This input can be used in mobile  
applications, such as boats where 120 or 230 VAC is not  
available or in applications that must continue to  
operate in case of a power failure.  
When a 24 VDC battery is connected (typically  
consisting of two 12 VDC lead-acid batteries in series),  
the unit will operate on the supplied DC voltage.  
-
+
FUSE  
-
1
2
+
VD  
C
1
2
VD  
C
figure 4.1: Connecting a DC power supply  
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4.1.2 Priority microphone (input 1)  
The priority microphone (or a generic call station) that  
can be used with push to talk (PTT) should be  
connected to “microphone/line 1 input with trigger”.  
The PTT mode can be activated by setting the DIP  
switch (3) at the rear of the unit.  
Microphone/line 1 input with trigger has priority over  
all other microphone/line inputs. If, however, the “Tel.  
emergency/70V input” receives a signal, all inputs  
including microphone/line 1 input with trigger will be  
overruled.  
The microphone/line 1 input with trigger has a Euro  
style pluggable screw terminal connector. This Euro  
style pluggable screw terminal connector has a trigger  
input which can be used in combination with the Euro  
connector.  
The priority microphone can be connected to the  
microphone/line 1 input with trigger as follows:  
Euro connector with trigger. See figure 4.2.  
Euro connector only (without trigger).  
Set the DIP switch settings for microphone/line 1 with  
trigger, as required. See section 4.3.  
Note  
When connecting an unbalanced line level  
(200 mV) signal to the microphone/line input,  
connect it as follows: Signal to +, connect to -  
and GND to ground.  
figure 4.2: Euro connector with trigger  
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4.1.3 Secondary microphone (input 2)  
Connect a secondary microphone to “microphone/line  
input 2”. See figure 4.3.  
4.1.4 Additional microphones  
(inputs 3 through 6)  
Connect additional microphones to microphone/line  
inputs 3 through 6, as required. See figure 4.3. These  
microphones will mix with the background music.  
Microphone/line input 2 has a DIP switch (3) at the rear  
of the unit for setting the VOX mode. If the DIP switch  
is set to VOX, the microphone/line input will  
automatically be switched when a signal is sensed at the  
microphone/line 2 input. For example, when someone  
speaks into the microphone, other sound will either be  
muted or ducked, depending on the setting of the  
ducking level control at the rear of the unit.  
See section 4.3.  
Set the DIP switch settings for microphone/lines 3  
through 6, as required. See section 4.3.  
The Tel. emergency/70V input, Call station input, and  
Microphone/line input 1 with trigger all have priority  
over the Microphone/line input 2. Therefore, any signal  
received on any one of these inputs will always be heard  
regardless of the ducking level control setting for  
Microphone/line input 2.  
Set the DIP switch settings for microphone/line input 2  
as required. See section 4.3.  
figure 4.3: Connecting microphone inputs  
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4.1.5 Emergency inputs  
The Tel. emergency/70V input, with VOX functionality,  
is used for receiving emergency announcements or  
signals (such as a fire alarm). This input has absolute  
priority, and will overrule all inputs when an emergency  
announcement or signal is received.  
Note  
Tel. emergency input does not mute the  
incoming signal so that an incoming pilot tone  
will be fed to the zone outputs. With this feature  
it is possible to use the mixer amplifier in a  
Bosch Voice Alarm System when using end of  
line boards (PLN-1EOL).  
The signal that is delivered to the unit should be  
quiet when a call is not made. The pilot tone and  
frequencies below 300 Hz are filtered from the  
trigger signal so that the input will not trigger  
from a pilot tone or low frequency rumble.  
Either a telephone line or a 70 V input signal can be  
connected to the Euro style pluggable screw terminal  
connector (12) at the rear of the unit. See section 4.1.5.1  
and section 4.1.5.2.  
Caution  
Never connect telephone lines and a 70 V signal  
to the Euro style connector at the same time.  
4.1.5.1  
Connecting 70 Volt input signal  
To adjust the volume of the emergency announcement  
or signal, turn the rotary dial (15) at the rear of the unit.  
For safety reasons, the volume of the emergency  
announcement or signal cannot be set to zero.  
Connect the 70 Volt input signal as shown in figure 4.4.  
The master volume control setting (7) does not influence  
the volume setting of the emergency announcement or  
signal.  
figure 4.4: Connecting 70 Volt input signal  
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4.1.5.2  
Connecting telephone lines  
Connect the telephone lines as shown in figure 4.5.  
Caution  
A connection to a telephone network must  
always be made via a telephone coupler that  
provides adequate isolation between the  
telephone network (PBX) and the Plena system.  
The telephone coupler must also meet all  
relevant requirements for this type of  
communication equipment as imposed by law  
and/or responsible telecommunication  
organizations in the country of use. Never try to  
make a direct connection between the telephone  
network and the mixer amplifier.  
figure 4.5: Connecting emergency telephone lines  
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4.1.6 Music source inputs  
When using a CD player, tuner or other auxiliary  
device for background music, connect the line-out  
connectors of the music source to the appropriate line-in  
connectors of the mixer amplifier.  
figure 4.6: Connecting music source inputs  
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4.2  
Connecting outputs  
4.2.3 Music only  
Use the music master output connector (23) to provide a  
dedicated music out source for another device. For  
example, the music master output can be connected to a  
telephone coupler, so that callers can listen to music  
when they are put on hold (see figure 4.7).  
4.2.1 Zone 1 and 2  
Connect speakers to the 70 V, 25 V or 4 Ohm terminal  
on the Euro style pluggable screw terminal connector  
(24) at the rear of the unit.  
Also see section 4.2.5 “Connecting speakers”.  
To select the dedicated music out source, set the master  
switch for “line out or music only” (22) to “music only”.  
Only the music inputs (18, 19, and 20) will be audible.  
All other inputs, including the Tel. emergency/70V  
input will not be sent to this output.  
4.2.2 Call only  
Connect speakers to the 70 V terminal on the Euro style  
pluggable screw terminal connector (24) at the rear of  
the unit.  
To hear all mixed inputs (microphone/line, emergency,  
and music) set the master switch for “line out or music  
only” (22) to “line out”.  
Also see section 4.2.5 “Connecting speakers”.  
4.2.4 Line out/ loop through  
Use the Pre-out, amp in insert (21) external sound  
processing equipment (e.g. an equalizer or Plena  
feedback suppressor) to be connected between the  
preamplifier and the power amplifier stages. See figure  
4.7.  
figure 4.7: Connecting music source inputs  
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4.2.5 Connecting speakers  
4.2.5.2 Low impedance loudspeakers  
4.2.5.1 Constant voltage loudspeakers  
figure 4.9: Connecting speakers  
figure 4.8: Connecting speakers  
Connect low impedance loudspeakers to the 4 Ohm/0  
terminals. This output can deliver the rated output  
power into an 4 Ohm load. Connect multiple  
loudspeakers in a series/parallel-arrangement to make  
the combined impedance 4 Ohm or higher. Check the  
loudspeaker polarity for in-phase connection.  
The mixer amplifier can drive 70 V constant voltage  
loudspeakers.  
Connect the loudspeakers in parallel and check the  
loudspeaker polarity for in-phase connection. The  
summed loudspeaker power should not exceed the  
rated amplifier output power.  
You can use the Call Only output for 3-wire remote  
volume control override. You can also use this output as  
an extra zone where announcements can be heard, but  
not music.  
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4.3  
Unit settings  
4.3.1 Rear panel settings  
The unit can be quickly set-up for operation by setting  
the following controls at the rear of the unit:  
DIP switches  
Rotary dials  
Master switch for line out or music only.  
See the following tables for an overview of the settings  
and typical examples of their use.  
table 4.1: DIP switch settings  
DIP switch  
Chime  
(mic/line 1)  
On  
Off  
Typical example (On)  
Chime will be sounded at the  
beginning of an announcement.  
Chime will not be sounded Announcement of train  
at the beginning of an  
announcement.  
departure time.  
PTT “Push to talk”  
(mic/line 1 only)  
This input is muted when the push Push to talk off. The signal  
Users can have private  
to talk contact is open. When the  
push to talk contact is closed:  
will be mixed with the other conversations during live  
mic/line signals. broadcasts (for example,  
Microphone 1 will mix with with an all call call-  
this input is available for  
speech.  
the background music or  
station, such as the  
PLE-1CS).  
a chime will sound, if selected. the other microphones in  
the music and other mic/line  
inputs will be reduced in  
the selected zones.  
volume to the level set by the  
ducking level control knob.  
Line  
Input signal from line.  
Input signal from  
microphone.  
Depends on set-up.  
Speech filter  
Enhances clarity of speech, by  
cutting-off the lower frequencies  
of the signal.  
Speech filter inactive.  
Use for announcements  
Phantom power  
Provides power to condenser  
microphones.  
Phantom power  
unavailable.  
Enable phantom power if  
you use electret or  
condenser microphones.  
Use to make casual  
announcements (such as  
announcing the winner of  
a competition) while  
temporarily suppressing  
the background music to  
an adjustable ducking  
level.  
VOX  
(mic/line 2 only)  
Temporarily suppresses the  
background music to an  
adjustable “ducking level” (see  
VOX inactive. Microphone  
2 will mix with the  
background music or the  
table 4.2) while you speak into the other microphones in the  
microphone. The VOX mode is  
normally used with hand-held  
microphones such as the  
LBC 2900/15. Background music  
and announcements will be heard  
in the selected zones. A chime is  
not available in this mode.  
selected zones.  
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table 4.2: Rotary controls  
Rotary control  
Effect  
Typical example  
Ducking level control Sets the required ducking level when VOX and/or  
push to talk is active (see table 4.1). When the  
Set the ducking level control to  
mute if you want the  
ducking level is set to mute, the music volume will be announcement to be heard without  
fully attenuated; when the ducking level is set to mix, background music.  
both music and speech inputs can be heard - music  
and speech will be mixed. When ducking the music  
input is ducked (attenuated), the microphone/line  
inputs are always muted when a call is made.  
Chime volume  
control  
Alters the chime volume. The mid range is -8 dB  
(40 V), which should be sufficient for most  
applications. Test the chime by switching on  
microphone 1. Remove the microphone after testing  
if it is not further required.  
Set the volume of the chime to a  
higher level when the system is  
being used in large open areas or  
when important announcements  
have to made.  
Telephone  
emergency/70V  
volume control  
Attenuates the emergency announcement or signal.  
Control range from -25 dB to 0 dB. For safety  
reasons, the volume of the emergency  
Set the volume of the emergency  
announcement to a higher level  
when the system is being used in  
large open areas.  
announcement or signal cannot be fully set to zero.  
Note  
When PTT or VOX are selected, the ducking  
control controls between 3 dB attenuation (very  
little ducking) to –dB (muted).  
When ducking, the music is also present on the  
Call only output. If you do not want this, set the  
ducking control to mute.  
When ducking, music in a non-selected zone is  
also affected.  
table 4.3: Master switch for line out or music only  
Slide switch setting Effect  
Typical example  
Line out  
All mixed inputs (microphone/line, emergency, and  
music) are available.  
A dedicated music out source is available for another The “music master output” can be  
Various set-ups are possible.  
Music only  
external device. Only the music inputs (18, 19, and  
20) are available. All other inputs, including the  
Tel. emergency/70V input will be overridden.  
connected to a telephone system,  
so that callers can listen to music  
when they are put on hold.  
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4.3.2 Pin settings and labelling  
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.  
The pins are engineered in such a way that they cannot  
be taken out by hand. This is to prevent tampering. The  
pins are intended to be inserted once, during installation  
of the unit. The silver pins should be used to indicate  
the preferred settings of the unit. The red pins can  
optionally be used to indicate the maximum setting of a  
knob.  
If these settings have to be changed, use a pair of soft-  
tipped pliers to carefully remove the pins. If you do not  
have a pair of soft-tipped pliers, you can use ordinary  
pliers instead, but first place some plastic tape on the  
tips of the pliers to prevent damaging the front of the  
unit.  
To remove the clear plastic covers in front of the labels:  
1 Carefully insert a small screwdriver into the cut-out  
at the bottom of the plastic cover.  
2 Gently lift the cover, and bend it in the middle. Take  
care not to force the cover or the front panel.  
To reattach the plastic covers with paper labels:  
1 Insert the paper label into the holder at the front of  
the unit.  
2 Pick up the cover, and then bend it slightly in the  
middle by hand.  
3 Fit the cover into the slot at the front of the unit, and  
then gently release the cover, making sure that the  
paper label stays in place.  
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5
Operation  
5.1.2 Switch off  
Set the power button (1) on the front of the unit to  
Off - popped out (see figure 5.2).  
5.1  
Switch on and off  
5.1.1 Switch on  
Caution  
Potential equipment damage. Before applying  
power, always check the voltage selector at the  
rear of the unit.  
1 Make sure the voltage selector (115V/ 230V) is  
correctly set for the country’s main voltage  
(see figure 5.1).  
2 Set the power button (1) on the front of the unit to  
On - pushed in (see figure 5.2).  
figure 5.1: Voltage selector  
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5.2  
Microphone/line controls  
The tone controls are not standard bass and  
Use the volume controls (9) to individually control the  
sound level of microphone/line inputs 1 through 6.  
treble controls: they can be used as a traditional tone  
control with high and low control, but also have a  
powerful contour that addresses problems found in real  
situations.  
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 5.2).  
Colored pins can also be inserted at various  
positions around the dial controls to indicate the  
favorite settings for a particular application.  
5.4.2 Microphone/line tone control  
The tone control for the microphone and line inputs  
boosts warmth in voices without boosting rumble, and  
cuts rumble without loosing warmth in the low  
frequencies. In the high frequencies, the tone control  
boosts sparkle without adding sharpness, but when  
cutting is first, cuts harshness and sharpness without  
reducing clarity.  
Use the Hi (high) and Lo (low) tone controls (see  
figure 5.2, numbers 3 and 10) to collectively change the  
tone of microphone/line inputs 1 through 6.  
5.3  
Music controls  
5.3.1 Source selection  
Use the music source selector (11) to select one of the  
connected music sources.  
5.4.3 Music tone control  
The tone control for the music inputs boosts deep bass  
first without making the sound boomy, and cuts rumble  
without loosing warmth in the low frequencies. In the  
high frequencies, the tone control is similar to the  
microphone inputs, with slightly different frequencies to  
suit music reproduction.  
5.3.2 Volume control  
Use the music source volume control (12) to control the  
sound level of the selected music source.  
5.4  
Tone control  
Use the Hi (high) and Lo (low) tone controls (see  
figure 5.2, numbers 5 and 13) to change the tone of the  
selected music source.  
5.4.1 Introduction  
The unique tone controls provide separate control for  
mic/line inputs and music inputs so that the voice on  
the microphones can be specifically optimized for  
excellent speech or singing. Correspondingly, the tone  
controls for background music provide the most  
appropriate music reproduction.  
1
2
3
4
5
6
7
8
B
9
10  
11  
12  
13  
14  
15  
16  
17  
figure 5.2: Front panel  
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5.5  
Output controls  
5.5.1 Zone selection  
Use the zone selection buttons (14 and 15) to route the  
music/microphone, line mix from the amplifier output  
to loudspeaker zone 1 and/or loudspeaker zone 2.  
Announcements, however, are always routed to both  
zones, irrespective of the position of the zone selection  
buttons.  
5.5.2 Master volume control  
Use the master volume control dial (7) to collectively  
control the sound level of all outputs, except the  
emergency announcement/signal.  
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6
Technical data  
6.1.5 RJ-45 input 2 x  
Call station input  
For PLE-2CS(MM)  
Wall panel input  
For PLE-WP3S2Z  
6.1  
Electrical  
6.1.1 Mains power supply  
Voltage  
115 - 230 VAC, 10%, 50/60 Hz  
Inrush Current PLE-2MA120-US  
8/16 A (230/115 VAC)  
Inrush Current PLE-2MA240-US  
9/19 A (230/115 VAC)  
6.1.6 Mic/line input 6 x  
Input 1 (Push-to-talk contact with ducking  
functionality)  
5-pin Euro style, balanced, phantom  
Input 2-6 (VOX with ducking functionality on  
input 2)  
5-pin Euro style, balanced, phantom  
Sensitivity  
1 mV (mic); 200 mV (line)  
Impedance  
>1 kohm (mic); >5 kohm (line)  
S/N (flat at max volume)  
63 dB  
S/N (flat at min volume/muted)  
>5 dB  
6.1.2 Battery power supply  
Voltage  
24 VDC, 15%  
Current PLE-2MA120-US  
6 A  
Current PLE-2MA240-US  
12 A  
Charge current  
0.5 ADC  
Dynamic range  
Charge float voltage  
27.4 VDC  
100 dB  
S/N (flat at max volume)  
>63 dB (mic); >70 dB (line)  
S/N (flat at min volume/muted)  
>75 dB  
6.1.3 Power consumption  
PLE-2MA120-US (mains)  
400 VA  
PLE-2MA240-US (mains)  
800 VA  
CMRR  
>40 dB (50 Hz to 20 kHz)  
Headroom  
>25 dB  
Speech filter  
-3 dB @ 315 Hz, high-pass, 6 dB/oct  
Phantom power supply  
16 V via 1.2 kohm (mic)  
Speech filter  
-3 dB @ 315 Hz, high-pass,  
6 dB/oct  
6.1.4 Performance  
Frequency response  
50 Hz to 20 kHz (+1/-3 dB @ -10 dB ref. rated  
output)  
Distortion  
VOX (input 1 & 2)  
attack time 150 ms; release time 2 s  
<1% @ rated output power, 1 kHz  
Low Control  
Max -12/+12 dB (frequency is level dependent)  
Hi Control  
Max -12/+12 dB (frequency is level dependent)  
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6.1.7 Music inputs 3x  
6.1.11 Loudspeaker outputs 70 V, 25 V*  
Connector  
Connector  
Cinch, stereo converted to mono  
Sensitivity  
200 mV  
Screw, floating  
Max / rated PLE-2MA120-US  
180 W / 120 W  
Impedance  
22 kohm  
Max / rated PLE-1906/10  
360 W / 240 W  
S/N (flat at max volume)  
>70 dB  
6.1.12 Loudspeaker output 4 Ohm*  
Connector  
S/N (flat at min volume/muted)  
>75 dB  
Headroom  
>25 dB  
Euro style pluggable screw terminal, floating  
PLE-2MA120-US  
22 V (120 W)  
PLE-2MA240-US  
31 V (240 W)  
6.1.8 Emergency / telephone 1 x  
Connector  
7-pin, Euro style pluggable screw terminal  
* Subtract 1 dB for 24 V battery operation.  
Sensitivity tel  
100 mV – 1 V adjustable  
Sensitivity 70V  
6.2  
Mechanical  
Dimensions (H x W x D)  
100 x 430 x 270 mm (19" wide, 2U high)  
Mounting  
Stand-alone, 19" rack  
Color  
Charcoal  
Weight (PLE-2MA120-US)  
Approx. 10.5 kg  
7 V – 70 V adjustable  
Impedance  
>10 kohm  
S/N (flat at max volume)  
>65 dB  
VOX  
threshold 50 mV; attack time 150 ms; release time 2 s  
Weight (PLE-2MA240-US)  
Approx. 12.5 kg  
6.1.9 Loop through insert 1 x  
Connector  
Cinch  
Nominal level  
1 V  
6.3  
Environmental  
Operating temperature  
-10 to +55 ºC  
Storage temperature  
-40 to +70 ºC  
Impedance  
>10 kohm  
Relative humidity  
<95%  
6.1.10 Master/music output 1 x  
Acoustic noise level of fan  
<33 dB SPL @ 1 m temperature control  
Connector  
3-pin XLR, balanced  
Nominal level  
1 V  
Impedance  
<100 ohm  
Bosch Security Systems | 2007-10 | PLE-2MA120-US, PLE-2MA240-US en  
© Bosch Security Systems B.V.  
Data subject to change without notice  
2007-10 | PLE-2MA120-US, PLE-2MA240-US en  

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