Bosch PLE‑4MA240‑CN Operation Manual
PLENA Mixer amplifier, 4‑zone, 240W
PLE‑4MA240‑CN
en
Operation manual
PLENA Mixer amplifier, 4-zone, 240W Table of contents | en 3
Table of contents
1
2
2.1 Manual purpose 5
2.2 Digital document 5
2.3 Intended audience 5
2.4 Alerts and notice signs 5
2.5 Conversion tables 5
2.6 Copyright and disclaimer 6
2.7 Document history 6
3
3.1 The PLENA product range 7
3.2 Parts included 7
3.3 The PLENA Mixer amplifier 7
3.4 Controls, connectors and indicators 9
3.4.1 Front panel 9
3.4.2 Rear panel 10
4
4.1 Unpack unit 11
4.2 Install unit in 19" rack (optional) 11
4.3 Check settings/configurations 11
4.4 Connect unit to mains 11
5
5.1 Connecting inputs 12
5.1.1 Priority microphone (input 1) 12
5.1.2 Additional microphones (inputs 2 and 3) 12
5.1.3 Emergency inputs 12
5.1.4 Music source inputs 13
5.2 Connecting outputs 13
5.2.1 Connecting loudspeakers 13
6
6.1 Unit settings 14
6.1.1 Rear panel settings 14
6.1.2 Pin settings and labeling 15
7
7.1 Switching on and off 17
7.2 Microphone control 17
7.3 Music control 17
7.3.1 Source selection 17
7.3.2 Volume control 17
7.4 Tone control 17
7.5 Output control 17
7.5.1 Zone selection 17
7.5.2 Master volume control 18
8
8.1 Customer service 19
9
10
Safety 4
About this manual 5
Introduction 7
Installation 11
Connections 12
Configuration 14
Operation 17
Troubleshooting 19
Maintenance 20
Technical data 21
Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |
4 en | Safety PLENA Mixer amplifier, 4-zone, 240W
!
1 Safety
Prior to installing or operating products, always read the Important Safety Instructions which
are available as a separate multilingual document: Important Safety Instructions (Safety_ML).
These instructions are supplied together with all equipment that can be connected to the
mains supply.
Safety precautions
The PLENA Mixer amplifier is designed to be connected to the public distribution network.
– To avoid any risk of electric shock, all interventions must be carried out with
disconnected mains supply.
– The ventilation should not be impeded by covering the ventilation openings with items
such as newspapers, table cloths or curtains.
– Connection of external wiring to this equipment requires installation by qualified
personnel only.
– The operation must only be performed by qualified personnel.
– Use the apparatus in moderate climate.
Caution!
These service instructions are for use by qualified service personnel only.
To reduce the risk of electric shock, do not perform any servicing other than that contained in
the operating instructions unless you are qualified to do so.
2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.
PLENA Mixer amplifier, 4-zone, 240W About this manual | en 5
!
!
2 About this manual
Please read this manual carefully before installing and operating the PLENA Mixer amplifier
and retain it for future reference.
2.1 Manual purpose
The purpose of this manual is to provide information required for installing, configuring and
operating a PLENA Mixer amplifier.
2.2 Digital document
This manual is available as a digital document in the Adobe Portable Document Format (PDF).
Refer to the product related information at: www.boschsecurity.com.
2.3 Intended audience
This manual is intended for installers and users of a PLENA system.
2.4 Alerts and notice signs
Four types of signs can be used in this manual. The type is closely related to the effect that
may be caused if it is not observed. These signs - from least severe effect to most severe
effect - are:
Notice!
Containing additional information. Usually, not observing a ‘notice’ does not result in damage
to the equipment or personal injuries.
Caution!
The equipment or the property can be damaged, or persons can be lightly injured if the alert
is not observed.
Warning!
The equipment or the property can be seriously damaged, or persons can be severely injured
if the alert is not observed.
Danger!
Not observing the alert can lead to severe injuries or death.
2.5 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 information provided below.
1 in = 25.4 mm 1 mm = 0.03937 in
1 in = 2.54 cm 1 cm = 0.3937 in
1 ft = 0.3048 m 1 m = 3.281 ft
1 mi = 1.609 km 1 km = 0.622 mi
Tab.2.1: Conversion of units of length
Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |
6 en | About this manual PLENA Mixer amplifier, 4-zone, 240W
°F = _ . °C + 32
9
5
°C = _ . (°F - 32)
5
9
1 lb = 0.4536 kg 1 kg = 2.2046 lb
Tab.2.2: Conversion of units of mass
1 psi = 68.95 hPa 1 hPa = 0.0145 psi
Tab.2.3: Conversion of units of pressure
Notice!
1 hPa = 1 mbar
°F = 9/5 (°C + 32) °C = 5/9 (°F - 32)
Tab.2.4: Conversion of units of temperature
2.6 Copyright and disclaimer
All rights reserved. No part of this document may be reproduced or transmitted in any form by
any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior
written permission of the publisher. For information on getting permission for reprints and
excerpts, contact Bosch Security Systems B.V..
The content and illustrations are subject to change without prior notice.
2.7 Document history
Release date Documentation version Reason
2018.11 V1.0 1st edition.
2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.
PLENA Mixer amplifier, 4-zone, 240W Introduction | en 7
3 Introduction
3.1 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 commercial audio systems tailored for virtually
any application.
The PLENA product range includes:
– mixers
– preamplifiers
– power amplifiers
– a music source unit
– digital message manager
– a feedback suppressor
– call stations
– an All-in-One system
– a voice alarm system
– a timer
– a charger
– a loop amplifier.
The various elements are designed to complement each other thanks to matched acoustical,
electrical and mechanical specifications.
3.2 Parts included
Quantity Component
1 PLE-4MA240-CN PLENA Mixer amplifier
1 Power cord
1 Set of 19”mounting brackets
1 Manual
1 Important safety instructions
3.3 The PLENA Mixer amplifier
The PLENA Mixer amplifier is a high performance 4-zone mixer amplifier, built on energy
efficient class-D technology. Three selectable music sources, including a front panel 3.5mm
input for hand-held device connection, provide flexibility for background music source.
Multiple levels of priorities and ducking of music make this amplifier an excellent choice for
background music and business paging.
One microphone input (Input 1) can be switched between microphone level and line level
sensitivity. The other two microphone inputs can be connected with XLR or TRS type
connectors. Phantom power can be switched on to provide power to condenser microphones.
Bosch Security Systems B.V. Operation manual 2019-03 | V1.1 |
8 en | Introduction PLENA Mixer amplifier, 4-zone, 240W
EMERGENCY
+
VOX
+
PTT DETECT
24V
PH-24V
MIC/LINE1
EMG-VOX
GAIN
MIC1-TR
PH SWITCH
+
MIC2
SOURCE-SELECT
AUX 1
+
MIC3
GAIN
DUCKING
CLASS D
LIMITER
CLASS D CTRL
B+
+
CHIME
LINE OUT
ZONE 1~4
MONITOR
VU-METER
MUTE
AUX 2
RELAY
I2C
100V
MIC1/LINE
MIC2
MIC3
AUX
BASS
TREBLE
MASTER VR
Micro
controller
TEL-EMG/MIX
SELECT
LINE-OUT
MUTE
ZONE1~4
AUX1~3
PRIO
CHIME ON/OFF
B+ (50VDC/6A)
+5VDC/1A
+28VDC/1A
SMPS
B+ ON/OFF
+24VDC/500mA
+28VDC
LDO
+3V3/250mA
+5VDC
LDO
+9VDC/100mA
230VAC
EMC
24VDC/100mA
SUPPLY
24V-PRIO
+24VDC
+24VDC
ZONE1~4 BUTTON
SOURCE BUTTON
FILTER
MIC/LINE
SWITCH
DUCKING
GAIN
ZONE CONTROL
TONE
CONTROL
BASS
TREBLE
MASTER
GAIN
SPI
I2C
EEPROM
-
+
ADC
ATTN
AUX 3
24V
PH-24V
PH SWITCH
24V
PH-24V
PH SWITCH
Input 1 can take priority over all other microphone and music inputs: Input 1 priority can be
activated by contact closure on the PTT (push to talk). A 2-tone chime can be configured to
precede an announcement.
The volume of each microphone input 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.
Separate music inputs are available with their own input selector and volume control. The user
can choose a music source like a CD/DVD player or radio (like the PLE-SDT), and set the level
of music. A front panel music input makes it easier to connect a hand-held device as music
source.
A telephone / 100V emergency input is provided for easy integration with a telephone paging
system or another Public Address system. It has its own preset volume control and overrides
all other inputs, including input 1.
The unit also provides a 24V DC output to override remote loudspeaker volume control
whenever there is a telephone or emergency input signal.
The unit has a line output to add amplifiers for larger systems with more output power.
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 controls to indicate favorite settings
for a particular application.
An LED VU meter monitors the master output. A headphone socket, below the VU meter,
provides the mixer output. 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.
For a schematic overview of the PLENA Mixer amplifier, see figure 3.1.
2019-03 | V1.1 | Operation manual Bosch Security Systems B.V.
Figure3.1: Schematic overview of PLE-4MA240-CN
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