Operating Manual - Bosch Security Systems
Contents
1. 24VDC Full power 12 32 Amp 3 dB 11 26 Amp 6 dB 8 18 Amp 10V 2 4 Amp Idle 0 3 1 Amp Full power 288 768 Watt 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers Power mains LBB 1935 20 LBB 1938 x0 Unit 3dB 264 624 Watt 6 dB 192 432 Watt 10V 48 96 Watt Idle 7 2 24 Watt Output limited to 3dB Corresponds to pink noise and voice on full power Output limited for sine wave signal to 3dB Technical data en 23 Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 24 en Technical data Plena Power Amplifiers 10 3 Mechanical specifications Dimensions Width 19 Height including feet 2 Unit models 100 mm 3 Unit models 145 mm Depth 2 Unit models 250 mm 3 Unit models 370 mm 19 Mounting brackets Included Weight LBB 1930 20 10 5 kg LBB 1935 20 12 5 kg LBB 1938 x0 25 0 kg 10 4 Environmental conditions Operating temperature range 10 to 55 C Storage temperature range 40 to 70 C Relative humidity lt 95 EMC emission According to EN55103 1 EMC immunity According to EN55103 2 Acoustic noise level of fan lt 45 dB SPL 1m at maximum speed 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Bosch Security Systems B V Torenallee2. 5 1 Front panel indicators 1 2 3 4 5 6 i Pilot Tone Battery Mains Overheat Figure 5 1 LBB 1930 20 LBB 1935 20 and LBB 1938 20 1 VU meter LED s for 20 6 OdB and power ON 2 Pilot Tone supervised function that monitors a 20 kHz pilot tone 3 Battery supervised function to indicate battery operation 4 Mains supervised function to indicate mains supply 5 Overheat supervised function to give warning of overheating 6 Air inlet cooling is made by forced ventilation from front to back Amplifiers can be stacked on top of each other A supply of cool air from the front is necessary 5 2 Rear panel connectors and switches I put 1 Input 2 Slavelinpu P ority Enjble 1004 Sole jority Controlled Output Figure 5 2 LBB 1930 20 LBB 1935 20 Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 10 en Connection and indicators 20 19 18 1 Input 2 Slave Input ity Enable 100V 17 16 15 Plena Power Amplifiers 14 Fault Relays Output Power ploione OME Bate Main Poner p y 12 O Detector Detec
3. Technical data en 21 3 pin XLR balanced Sensitivity 1V Impedance 20 kohm CMRR gt 40 dB 50 Hz 20 kHz 100V input screw unbalanced Sensitivity 100 V Impedance 330 kohm Loudspeaker outputs Line loopthrough output 3 pin XLR balanced Nominal level 1V Impedance Direct connection to line input Maximum rated output power 70 100V output LBB 1930 20 240 W LBB 1935 20 240 W LBB 1938 x0 480 W 8 Ohm outputs LBB 1930 20 31V 120W LBB 1935 20 44V 240 W LBB 1938 x0 62 V 480 W Power reduction 24 V battery operations Reference rated power 1 dB LBB 1935 20 2 dB LBB 1930 20 LBB 1938 x0 Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 22 en Technical data Plena Power Amplifiers 10 2 5 Power consumption Power mains LBB 1930 20 Unit Full power 274 Watt 3 dB 193 Watt 6 dB 143 Watt 10V 41 Watt Idle 18 Watt Backup power 24VDC Full power Z Amp 3 dB 6 Amp 6 dB 4 Amp 10V 1 Amp Idle 0 1 Amp Full power 168 Watt 3 dB 144 Watt 6 dB 96 Watt 10V 24 Watt Idle 2 4 Watt Power mains LBB 1935 20 LBB 1938 x0 Unit Full power 451 987 Watt 3 dB 340 715 Watt 6 dB 244 508 Watt 10V 55 113 Watt Idle 16 25 Watt Backup power
4. conditions 24 Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 4 en Safety Plena Power Amplifiers 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 Power Amplifier 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 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 a 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 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers About this manual en 5 2 About this manual 2 1 Manual purpose The purpose of this manual is to provide information required for
5. inside the unit is used as a voltage selector Insert the high power fuse into fuse holder F701 for 100V selection default setting or into fuse holder F702 for 70V selection This selection does not affect the output voltage of the loudspeaker direct outputs Figure 5 4 Internal fuse setting LBB 1930 20 LBB 1935 20 LBB 1938 x0 See also Rear panel connectors and switches page 9 Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 12 6 2 en External connections Plena Power Amplifiers External connections Connect the back up power supply The power amplifier has a 24VDC input 8 screw terminal to connect a back up power supply You must connect an earth 9 to the unit to increase the electrical stability of the system Figure 6 1 Back up power supply Connecting line input and loop through The power amplifier has a balanced line input for connection to a pre amplifier or a mixer Use the loop through connection to connect the power amplifier to another power amplifier if more power is needed Each power amplifier must be connected to its own set of loudspeakers Do not connect power outputs to each other Use program line input 2 4 and line loop through 2 6 for normal operation without priority Figure 6 2 Line input and loop through 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers
6. installing configuring operating and maintaining the Plena Power Amplifier The following related documents are available Plena Voice Alarm System Operation manual Plena Voice Alarm System Software manual 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 operators 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 gt alla ld Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 6 en About this manual Plena Power Amplifiers 2 5 Conversio
7. 49 5617 BA Eindhoven The Netherlands www boschsecurity com Bosch Security Systems B V 2014
8. B 1930 20 LBB 1935 20 LBB 1938 x0 If mains power or back up power is available the VU bar 1 on the front of the power amplifier is lit and shows the output level of the amplifier If the internal temperature reaches a critical limit due to poor ventilation or overload an overheat protection circuit switches OFF the power stage The overheat indicator 5 shows on the front panel and the Input fault relay switches over if the power stage is switched OFF by the overheat protection circuit The Battery operation indicator 3 lights up if the mains power supply is failing and the back up battery is in use Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 18 en Operation Plena Power Amplifiers 8 2 Connecting the priority input and using the control terminals The power amplifier is provided with a balanced priority input Input 1 Priority to connect to a pre amplifier or mixer Refer to figure 5 2 and 5 3 Apply a control voltage of 2 24V to the input 1 priority control terminals 20 to switch ON the priority input 1 and mute the program input 4 A local music source can be connected to the program input and a remote emergency system to the priority input The emergency source must be able to supply the 2 24V control voltage to override the local music source The program input can be remotely controlled by using a switch that is connected to the input 2 enable control
9. External connections en 13 6 3 100V slave input The power amplifiers have a 100V slave input 18 that can be connected to an existing 100V loudspeaker line In this way it is easy to connect an additional power amplifier on a remote location for more output power The 100V input is not affected by the control terminals for input 1 priority 20 or input 2 enable 19 BEEBEBE Dt en Q Q Q o SED Oe Bor Input _Loopthrough Input _Loopthrough Io Priori Figure 6 3 100 V slave input Notice If the 100V slave input is used and the OV and 100V are incorrectly connected no pilot tone is detected on the power amplifier Refer to section Input pilot tone page 16 for more information 6 4 Constant voltage loudspeakers The power amplifier can drive 100V constant voltage loudspeakers at full power 100V or half power 70V Connect the loudspeakers in parallel and check the loudspeaker polarity for in phase connection The summed loudspeaker power should not exceed the rated amplifier power Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 14 en External connections Plena Power Amplifiers 6 5 Low impedance loudspeakers Connect low impeda
10. Plena Power Amplifiers LBB1930 20 LBB1935 20 LBB1938 20 LBB1938 70 BOSCH en Installation and Operation manual Plena Power Amplifiers Table of Contents en 3 Table of contents 1 Safety 4 2 About this manual 5 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 6 2 6 Copyright and disclaimer 6 2 7 Document history 6 3 System Overview 7 3 1 Product range introduction 7 3 2 Power amplifier range 7 4 Installation 8 5 Connection and indicators 9 5 1 Front panel indicators 9 5 2 Rear panel connectors and switches 9 5 3 Internal setting 11 6 External connections 12 6 1 Connect the back up power supply 12 6 2 Connecting line input and loop through 12 6 3 100V slave input 13 6 4 Constant voltage loudspeakers 13 6 5 Low impedance loudspeakers 14 6 6 Priority controlled loudspeaker 15 6 7 Power 15 7 Supervision 16 71 Input pilot tone 16 7 2 Battery supervision 16 1 3 Mains supervision 16 8 Operation 17 81 Switch ON 17 8 2 Connecting the priority input and using the control terminals 18 9 Maintenance 19 10 Technical data 20 10 1 Electrical 20 10 1 1 Mains voltage 20 10 1 2 Battery voltage 20 10 1 3 Rated power 20 10 2 Performance 20 10 2 1 Signal performance 20 10 2 2 Signal to Noise Ratios 20 10 2 3 Line inputs 21 10 2 4 Loudspeaker outputs 21 10 2 5 Power consumption 22 10 3 Mechanical specifications 24 10 4 Environmental
11. cility The amplifiers have overload and short circuit protection A temperature controlled fan and overheat protection gives high reliability Battery operation with automatic switchover from the mains supply is available Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 8 en Installation Plena Power Amplifiers 4 Installation The power amplifier is intended for tabletop use however the unit can also be mounted in a 19 rack For 19 rack installation use The 19 rack mounting brackets which come with the product Standard M6 mounting screws 16 mm thread depth 20 mm total length The power amplifier has an internal fan regulated to keep the temperature inside the unit within safe operating conditions Figure 4 1 Brackets for 19 rack mounting Notice If you install the product into a 19 rack Ensure that it does not exceed the overheating temperature 45 C ambient Make sure that warm air that is expelled from the side and rear can flow away Ensure sufficient ventilation and enough room about 10cm 4 behind the unit for cables and connections Use the included Bosch 19 mounting brackets LBC 1901 00 x2 Remove the tabletop feet from the bottom of the unit 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers Connection and indicators en 9 5 Connection and indicators
12. e front panel and the battery fault relay switches over The battery supervision indicator can be set to ON or OFF with the battery detection switch 15 Rear panel connectors and switches page 9 The battery indicator on the front panel is set to OFF but the fault relay switch still functions The amplifier will work between 20VDC and 26 5VDC Below 20VDC the amplifier will shut down if the mains is not present The amplifier will automatically switch from primary power mains to backup power 24VDC this changeover is automatic During switch over a glitch can be heard in the audio signal typically this lasts less than 1 second maximum 2 seconds duration Mains supervision The power amplifier supervises the availability of the mains supply If the mains supply fails falls below the threshold of 20 and the back up power supply takes over the fault relay moves to the NOK position A mains fault indication shows on the front panel and a fault state is given by the mains fault relay 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers Operation en 17 8 Operation 8 1 Switch ON Put the power switch on the rear of the power amplifier in the position Figure 8 1 Power switch and power connection 1 2 3 4 5 6 Status i Pilot Tone Battery Mains Overheat Figure 8 2 LB
13. n 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 1in 25 4 mm 1mm 0 03937 in 1in 2 54 cm 1cm 0 3937 in 1 ft 0 3048 m im 3 281 ft 1 mi 1 609 km 1km 0 622 mi Table 2 1 Conversion of units of length 1lb 0 4536 kg 1 kg 2 2046 Ib Table 2 2 Conversion of units of mass 1 psi 68 95 hPa 1 hPa 0 0145 psi Table 2 3 Conversion of units of pressure Notice 1 hPa 1 mbar o 9 o F C 32 5 5 C gt F 32 9 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 2014 01 10 V1 0 1st edition 2014 01 21 v11 2 edition Minor technical data changes 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers 3 2 System Overview en 7 System Overview Product range introduction The Power Amplifier is part of the Plena product range The Plena product range provides p
14. nce loudspeakers to the 8 ohm O terminals This output can deliver the rated output power into an 8 ohm load Connect multiple loudspeakers in a series parallel arrangement to make the combined impedance 8 ohm or higher Check the loudspeaker polarity for in phase connection 100V 70V I I l q 4 Priority Controlled Output 24V DCin 100V_ 0 100V 0 Moe T T Lt Ld Priority Only No Priority Prl Figure 6 4 Priority input and control terminals 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers External connections en 15 6 6 Priority controlled loudspeaker Loudspeakers connected to the Priority Only output will receive only audio signals with priority like calls from a call station Loudspeakers connected to the No Priority output will receive all audio signals such as music but no signals with priority like calls 6 7 Power Use the mains lead to connect the amplifier to the power supply Figure 6 5 Mains lead Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 16 71 7 2 7 3 en Supervision Plena Power Amplifiers Supervision Supervision is provided for Pre amplifier and power amplifier function Battery and mains supervisi
15. on Relays are provided on the rear panel for the each supervised function and are normally energized fail safe Each relay has 3 contacts normally open common and normally closed If an application does not need supervision the indicators on the front panel can be set to OFF with the switches next to each relay output The relays always function and are independent of the indicator switch setting Input pilot tone The Plena Voice Alarm System uses a pilot tone of 20kHz at 20dBV to supervise the pre amplifier the connections between the pre amplifier and the power amplifier and function of the power amplifier If the input signal from the pre amplifier stops the mains and battery fail or the power amplifier stops for any other reason the pilot tone stops the pilot tone fault indication shows on the front panel and a signal is given on the Input fault relay If the power amplifier stops through overheat then the overheat indicator shows on the front panel the signal is given on the Input fault relay The pilot tone detection indicator can be set to ON or OFF with the pilot tone detection switch 17 see Rear panel connectors and switches page 9 The pilot tone indicator on the front panel is set to OFF but the fault relay switch still functions Battery supervision The power amplifier supervises the availability of the back up power supply If the battery supply fails the battery fault indication shows on th
16. terminals 19 Closing the switch forces the input to lt 2V and disables the program input Application example of the use of the power amplifier control terminals You can use up to 6 power amplifiers in combination with the Plena LBB1925 10 System Pre amplifier to build a powerful multi zone sound system Zone switching of BGM and calls is done via the LBB1925 10 zone relays in combination with the power amplifier control terminals The LBB1925 10 controls the background music by distributing 24VDC via the music zone relays to the input 2 enable control terminals 19 The LBB1925 10 controls the calls by distributing 24VDC via the call zone relays to the input 1 priority control terminals 20 Each power amplifier serves one loudspeaker zone Each zone can be OFF or receive music or a Call Figure 8 3 LBB1925 10 and power amplifier control terminals example 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers Maintenance en 19 9 Maintenance The units require minimum maintenance however to keep the units in good condition the following tasks should be carried out Clean the units Periodically clean the units with a damp lint free cloth Clean the air inlets The units can collect dust from the operation of the in
17. ternal fans The air inlets of the units should therefore be cleaned on a yearly basis Periodically check unit connections and grounding To ensure that all cable connections to the units are secure The ground Protective Earth connection of the system components Warning Dangerous mains voltages are present inside the units Disconnect the main power supply before doing any maintenance tasks Bosch Security Systems B V Installation and Operation manual 2014 01 V1 1 LBB193x x0 20 en Technical data 10 10 1 10 1 1 10 1 2 10 1 3 10 2 10 2 1 10 2 2 Technical data Electrical Mains voltage LBB 1930 20 LBB 1935 20 Plena Power Amplifiers 230 115 VAC 10 50 60 Hz LBB 1938 20 230 VAC 50 60 Hz LBB 1938 70 110 VAC 50 60 Hz Battery voltage Battery voltage 24V DC 20 26 5 V Rated power LBB 1930 20 400 VA LBB 1935 20 960 VA LBB 1938 x0 1600 VA Performance Signal performance Frequency response 50 Hz 20 kHz 1 3 dB 10 dB ref rated output Distortion lt 1 rated output 1 kHz Signal to Noise Ratios LBB 1930 20 gt 80 dB LBB 1935 20 gt 85 dB LBB 1938 x0 gt 90 dB 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers 10 2 3 10 2 4 Line inputs
18. tion O m mm LLII ofen uw ofen ND 100V 1d 4 Direa Output fr 00V_0 70V 0 80 11 CELOGA 4 Priority Controlled Output 6 I Loopthrhugh Input 4 5 6 Figure 5 3 LBB 1938 x0 100v 100v ov SOAOKSBEOID TT Priority Only No Priority Note that slight deviations from the rear panel layout shown may occur 2 0 Na aD ie NOPRPRPRP PRP RPP BPR SOON AAPEWNHE Priority line input 1 XLR balanced Level control input 1 Priority loopthrough output 1 XLR balanced Program line input 2 XLR balanced Level control input 2 Program loopthrough output 2 XLR balanced Priority controlled loudspeaker output terminals 24 Vdc power supply terminals Earth connection screw Mains fuse T10A Mains connector 3 pole ON OFF switch Voltageselector Not on LBB 1938 x0 Loudspeaker direct output terminals Battery detection Fault relay output Pilot Tone detection 100 V slave input terminals Input 2 enable control terminals Input 1 priority control terminals 2014 01 V1 1 LBB193x x0 Installation and Operation manual Bosch Security Systems B V Plena Power Amplifiers Connection and indicators en 11 5 3 Internal setting The output voltage of the priority controlled loudspeaker outputs can be set to 70V or 100V A high power fuse
19. ublic address solutions for places where people gather to work worship trade or to relax It is a family of system elements that are combined to create public address systems tailored for virtually any application The Plena product range includes Mixers Pre amplifiers Power amplifiers Music source unit Digital message manager Feedback suppressor Call stations All In One system Voice Alarm System Timer Charger Loop amplifier The various elements are designed to complement each other using matched acoustical electrical and mechanical specifications All Plena Power Amplifiers in this manual are designed for use in EN54 16 and EN60849 compliant systems Power amplifier range The Plena Power Amplifier range consists of the following mono amplifiers 120W LBB 1930 20 2 units high 240W LBB 1935 20 2 units high 480W LBB 1938 x0 3 units high In this manual all illustrations show either the LBB 1938 x0 power amplifier that is 3 units high the LBB 1930 20 LBB 1935 20 power amplifier that is 2 units high All connections are similar between the different power amplifiers These power amplifiers have 70V and 100V constant voltage outputs and a low impedance output for 4 or 8 Ohm loudspeakers Two inputs Priority and Program give priority and controlled outputs A 100V slave input gives connection to existing loudspeaker lines The line inputs are balanced and have a loop through fa
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