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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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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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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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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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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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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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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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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Intentionally left blank
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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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Intentionally left blank
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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
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