Bosch LBB1935/20 Operating instructions
Contents
1. O Figure 2 1 The output voltage of the priority controlled loudspeaker outputs can be set to 70 V or 100 V To this end a high power fuse inside the unit is used as a voltage selector Insert the high power fuse into fuse holder F701 for 100 V selection default setting or into fuse holder F702 for 70 V selection This selection does not affect the output voltage of the loudspeaker direct outputs Caution Never insert two fuses into F701 and F702 simultaneously Bosch Security Systems 2003 09 3922 988 92983en a Booster Amp allation and Operating a a allatio a en 11 3 Installation in rack LBB1930 LBB1935 LBB1938 Figure 3 1 The booster amplifier is delivered for tabletop use but you can mount it in a 19 rack using the brackets supplied with the unit In case of rack mounting you must remove the 4 feet from the bottom of the unit Without the feet the LBB1930 and LBB1935 are 2U high and the LBB1938 is 3U high leave IU empty rack space above the LBB1930 or LBB1935 to ensure sufficient air flow ensure that the ambient temperature of the unit in the rack does not exceed 55 C In case of rack mounting removal of the top cover of a booster amplifier is allowed to improv2. LBB1930 LBB1930 vu LBB1935 LBB1935 100V 70V 8Ohm Va a 100V 70V 0 n o Figure 4 7 X4 Ohm X4 Ohm z 18 Ohm d 8 Ohm TPT X8 Ohm A 8 Ohm Lo Cab 1 LLM d 100V 70V 8 Ohm Figure 4 9 LBB 8 Ohm vu 1938 X8 Ohm A8 Ohm fae X 8 Ohm A8 Ohm 70V 100V 70V A4 Ohm 8Ohm AU AE 4 Ohm 0 0 P 100V 70V z D F701 TF702 id ps Cy EK Priority Only Nap T No Priority iE o o 0 Figure 4 8 Priority Only No Priority Figure 4 10 4 5 1 Constant voltage loudspeakers The booster amplifier can drive 100 V constant voltage loudspeakers at full power 100 V or half power 70 V 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 2003 09 3922 988 92983en a Booster Amplifie allation and Operating Manua ernal settings and connectio en 17 LBB1938 only Ensure that the fuse for loudspeaker voltage selection is properly set see chapter 2 The Priority Only and No Priority outputs are controlled by a priority relay The Priority Only output only provides priority announcements while the No Priority output just provides the program signal and switches OFF at priority calls You can also use the Priority Only output for 3 wire remote volume control override In this case ensure that the
3. Apparatus delivered connected for 230V Figure 4 5 Inputi Inp Priority En Pelee 2 24VGND 2 24VGND 100V 0 Default Off Default On Input Priorit Input 2Program OOOO Input Loopthrough Input l Loopthrough Rated input q4 ired Output power 1600VA o 100V o 70v o Bohm 100V 70V TBB 1538 00 38900 193 80005 T0 celo v Priority Only 1 1 100V 0 70V 82 4 Priority Controlled Out Line fuse 1 TI0L250V No Priorit LBB1938 Apparatus delivered connected for 230V 2AVDC IN WO G9 G9 C9 1 1 100V 0 1 1 100V 0 Figure 4 6 The booster amplifiers have a 100 V slave input that can be connected to an existing 100 V loudspeaker line In this way it is easy to connect an additional booster amplifier on a remote location for more output power The 100 V input of the LBB1938 13 is not affected by the control terminals for input 1 priority 15 or input 2 enable 14 Bosch Security Systems 2003 09 3922 988 92983en a Booster Amplifie allation and Operating Manua ernal settings and connectio en 16 4 5 Connecting loudspeakers
4. Plena Booster Vat e Hi allation and Operating Manual Abo e equiome en 7 1 About the equipment LBB1930 bw LBB1935 aE tow 70V how 0 9 p v SS 8Ohm o4 i Loopthrough o 100VO Slave Input 100V r4 Fuse DC Fuse 0 a 4 nim GD T gt 230V coe Power DC In sav o v bo poo Figure 1 1 Overheat LBB1938 E 0O 100V 70V Input 1 Priority Ohm 0 Loopthrough 1 9 pthrougl 70V F702 Input 2 Program O O v o L loreto Priority Only Loopthrough 2 o 1 O No Priority 0 0 Input 1 Priority o 2 24V Input 1 OV Input 2 0 Input 2 Enable 2 24V Enable OV Mute 0 100V0 t1 Slave Input 100V 1 Power Fuse 10A Prush current 280V DC Fuse 40A Power aD T Battery l 9 ft DC In 24V PH E Figure 1 2 Bosch Security Systems 2003 09 3922 988 92983en a Booster Amplifie allation and Operating Manual Abo e equiome en 8 The Plena Booster Amplifier range consists of three mono amplifiers with output powers of 120 W LBB1930 240 W LBB1935 or 480 W LBB1938 These booster amplifiers have 70 V and 100 V constant voltage outputs and a low impedance output for 8 Ohm loudspeakers The amplifiers are protected against overload and short circuits Built in features like a temperature controlled fan and an overheat protect
5. 100 V input Screw unbalanced Sensitivity Impedance 1V 20 kOhm gt 25 dB 50 Hz 20 kHz 100 V 330 kOhm Bosch Security Systems 2003 09 3922 988 92983en 6 4 Outputs Line loopthrough output 3 pin XLR 6 3 mm phone jack balanced LBB1930 x0 LBB1935 x0 Nominal level Impedance and Opera 1V direct connection to line input Line loopthrough output 1 2 3 pin XLR balanced LBB1938 00 Nominal level Impedance Loudspeaker outputs Screw floating Max rated output power 70 100 V output LBB1930 x0 LBB1935 x0 LBB1938 00 8 Ohm output LBB1930 x0 LBB1935 x0 LBB1938 00 Output power 24 V battery operation 6 5 Environmental conditions Operating temperature range Storage temperature range Relative humidity 6 6 General EMC emission EMC immunity Acoustic noise level of fan LBB1930 x0 LBB1935 x0 LBB1938 00 Dimensions LBB1930 x0 LBB1935 x0 LBB1938 00 Weight LBB1930 x0 LBB1935 x0 LBB1938 00 19 mounting brackets 1V direct connection to line input 180 W 120W 360 W 240 W 720 W 480 W 31 V 120 W 44 V 240 W 62 V 480 W 1 dB ref rated power 10 to 55 C 40 to 70 C lt 95 acc to EN 55103 1 acc to EN 55103 2 lt 45 dB SPL 1 m lt 48 dB SPL Q 1 m 100 x 430 x 270 mm 19 wide 2U high with feet 145 x 430 x 370 mm 19 wide 3U high with feet approx 10 5 kg approx 12 5 kg approx 25 kg included en 20 Bosch Security Sys
6. sse 14 44 100 V slave input tete eene deaitteaicieeii iie e qe ca a dastesdie beta erae te c Ie c Pe e ara 15 4 5 Connecting loudspeakers serseri seerne dssdossdasedueel eie ie I IRIS e e He Pe PED Pe D PAPA ae paga 16 4 5 1 Constant voltage loudspeakers socero iiiar A r E A AA tenente tenentes 16 4 5 2 Low impedance loudspeakers s ssesseeeenenenenenetenntnnnnnnntnnnnnnnnntnnetenetetenetetetete tenete tenens 17 4 6 Mams Connecti nc iiie to iie pietati ein pei diet ee pisei thes teen a ee a ae a a ase En Sai nasas 17 5 Operation of booster amplifier sce IL INAS EASE ee NAE are at re aa Pde RCRD Os 18 6 Technicaldatassuno0 tm tet to en eterne ed ard bns terio itesit abierto set ulus tige arate Mis ee Sal is alae goes 19 6 SMe Ctr Gali zero ree ede lee ana eet one dae ad eene ae A a ovt ue eae reine ev oe iege ed 19 0 2 Performance 45e ORO UU eoe ea tnde dee dede de eae ade ane aede EA Pas e eo edere eoe reote 19 6 3 TInpulsz ue n RI E ER E Rr S RE FOREN QN EE TEES eee ENTENDER RUNE PETS 19 rks SOU DUS E 20 65 Environmental conditions teet esee aee eee esate avec ie ae Pee ree eee ree eae 20 6 60 JGenetal nce nete oae Tastee alee hai eed A dhe a 20 Bosch Security Systems 2003 09 3922 988 92983en Plena Booster Amplifier Installation and Operating Manual Table of Contents en 6 Bosch Security Systems 2003 09 3922 988 92983en
7. install and operate the unit Conventions Safety precautions en 4 Bosch Security Systems 2003 09 3922 988 92983en Plena Booster Amplifier Installation and Operating Manual Table of contents en 5 Table of contents Important safeguards ete tetetetestecteceteteseetetetetetetet eiecit dett n n d ad 3 Aboutthisauanual ette tre ra Rye NOR Ii desee etta ede deepen sa deste petu de o ee ev ena lai n rea 4 Safety precautions M 4 Table of Contents rm e TR POP EP ETE FOE ERR ETPRETEEE CTT ETE eR I EERE Cee Oe 5 1 Aboutthe equipment iae tette IRER AARE AE RPR IRR ANE AEREA 7 Lilt Controls and indicators front ots iioi E d iiy i piene 8 12 Controls and connections LBB1930 LBB1935 rear ssseeeseseseseseeeeeetetettttnte tenete ttt 9 1 3 Controls and connections LBB1938 rear sees eeentete tette tette ntete retener ettet 9 2 Internal setting LBBI938 only iiie tite niter eren ehe de d ae e bd terris 10 3 Installation im rackzs autonome eri na ade taria dado ap ere RENE 11 4 Externalsettings and connections eee tee eee eme enn E rd ea nra a 12 41 Connect the DC supply battery ssssssssssseeeneeeetententtntetetententnntte tente ntettntenentente tette tetnentens 12 4 2 Connecting the line input and loopthrough sees 13 43 Connecting the priority input and using the control terminals LBB1938 only
8. pin This plug will only fit into a grounding type power outlet This is a safety feature If you are unable to insert the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the grounding type lug 10 11 12 13 14 15 16 17 18 19 en 3 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 Overloading Do not overload outlets and extension cords as this can result in a risk of fire or electrical shock 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 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 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 Tf liquid has been spilled or objects have fallen into the unit Ifthe unit has been exposed
9. selected voltage for the Priority Only output is the same as for the direct output used 4 5 2Low impedance loudspeakers Connect low impedance loudspeakers to the 8 Ohm 0 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 4 6 Mains connection LBB1930 LBB1935 Figure 4 11 Figure 4 12 Use the supplied mains cord to connect the system to the mains supply Note LBB 1930 and LBB 1935 only If necessary set the mains voltage switch 230 240 V 11 to the required voltage using a sharp object e g a small screwdriver Bosch Security Systems 2003 09 3922 988 92983en a Booster Amplifie allation and Operating Manual Operation of booster amplifie en 18 5 Operation of booster amplifier 5 LBB1930 LBB1935 Plena Booster Amplifier BOSCH 0dB i 6dB LI 20 dB olj Power Figure 5 1 2 LBB1938 Plena Booster Amplifier BOSCH 0dB n 6 aB I 20 dB l oj Battery Overheat m Lr Power Figure 5 2 Upon switching ON the amplifier using the power button 1 the green Power On LED 2 lights up The VU bar shows the output level of the amplifier If the internal tem
10. to rain or water Ifthe 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 Ifthe 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 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 Safety Check Upon completion of any service or repairs to the units ask the service technician to perform safety checks to determine that the unit is in proper operating condition 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 Bosch Security Systems 2003 09 3922 988 92983en Via a A O a Boo Amp allation and Operating Manual Abo anua About this manual This manual provides all the information required to
11. LBB1930 T2 5A 4 Line input phone jack balanced LBB1935 T4A 5 Line loopthrough XLR balanced 10 Mains connector 3 pole 6 Line loopthrough phone jack balanced 11 Mains voltage switch 230 240 V 7 Loudspeaker output terminals and 24 Vdc power supply terminals 1 3 Controls and connections LBB1938 rear 15 14 13 12 LBB1938 Prony Cabe 00V Poesone mw p 11 o eee o WOOO P 10 2 24 0V 0 1 1 1 1 I nosov NL Input 1 Priorit Input 2 Program 1 put Loopthrhugh Inpit Loopthr ugh 24VDC IN 4 Priority ControlledOutput Priority Only No Priority I WOW COO eoe o o E S Figure 1 6 Priority line input 1 XLR balanced Level control input 1 Line loopthrough 1 XLR balanced Program line input 2 XLR balanced Level control input 2 Line loopthrough 2 XLR balanced Priority controlled loudspeaker output terminals oo 10 ci WN e e Earth connection screw 9 24 Vdc power supply terminals 10 Mains fuse T10A 11 Mains connector 3 pole 12 Loudspeaker direct output terminals 13 100 V slave input terminals 14 Input 2 enable control terminals 15 Input 1 priority control terminals Bosch Security Systems 2003 09 3922 988 92983en gt a DOO Amp allation and Operating anua en 10 LBB1938
12. Plena Booster Amplifier Security Systems Installation and Operating Manual LBB 1930 LBB 1935 LBB 1938 BOSCH Important safeguards 1 Read instructions All the safety instructions for use should be read before the system is operated Retain instructions The safety instructions and instructions for use should be retained for future reference Heed warnings All warnings on the unit and in the operating instructions should be adhered to Follow instructions All operating instructions and instructions for use should be followed Cleaning Unplug system units from the mains outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning Attachments Do not use attachments not recommended by the product manufacturer as they may cause hazards Water and Moisture Do not use this unit near water for example near a bathtub washbowl kitchen sink or laundry basket in a wet basement near a swimming pool in an unprotected outdoor installation or any area which is classified as a wet location Accessories Do not place this unit on an unstable stand tripod bracket or mount This unit may fall causing serious injury to a person and serious damage to the unit Use only a stand tripod bracket or mount recommended by the manufacturer or sold with the product Any mounting of the unit should follow the manufacturer s instructions and should use a mounting accessor
13. e the ventilation In such a case always use the shimming washers that come with the brackets and make sure to comply with the safety instructions The amplifier has a built in temperature controlled fan for reliable operation at high output power for a prolonged time If the internal temperature reaches a critical limit due to insufficient air flow overload or an excessive ambient temperature the overheat protection will be activated causing the amplifier to switch to standby mode Bosch Security Systems 2003 09 3922 988 92983en en 12 4 External settings and connections 41 Connect the DC supply battery Y pe LBB1930 120W F F15A LBB1935 240W F F30A LBB1938 480W F F40A Figure 4 1 Figure 4 2 The booster amplifier has a 24 Vdc input screw terminal which you can use to connect a back up power supply e g batteries You can earth 8 the unit to increase the electrical stability of the system Caution The connection cable must have an in line fuse Use the type of fuse as mentioned in the illustration Bosch Security Systems 2003 09 3922 988 92983en gt a booster Amplitie allation and Operating Manua ernal se onnectio en 13 LBB1930 LBB1935 LBB1930 LBB1935 Figure 4 3 The booster amplifier has a balanced line input for connection to a preamplifier or a mixer Use the loopthrough connectio
14. ion ensure high reliability Battery operation with automatic switchover from the mains supply is possible The line inputs are balanced and have a loopthrough facility a 100 V slave input allows for connection to existing loudspeaker lines The LBB1938 has double inputs with a priority function and priority controlled outputs 11 Controls and indicators front 3 LBB1930 LBB1935 Plena Booster Amplifier BOSCH 0dB 6 dB 20 dB e Figure 1 3 LBB1938 Plena Booster Amplifier BOSCH oa 6 cB 20 aB olll Battery Overheat Ci ra Power Figure 1 4 Power button VU meter LED s for 20 6 0 dB and Power ON Battery operation indicator only for LBB1938 Overheat indicator only for LBB1938 Air inlet for forced air cooling only for LBB1938 ak UO Ne Bosch Security Systems 2003 09 3922 988 92983en a A O a Boo Amp allation and Operating al Abo e equipme en 9 LBB1930 LBB1935 11 24V DC IN mMm 1 0 9 8 Figure 1 5 1 Level control 8 Earth connection screw 2 100V 0 V slave input terminal 9 Mains fuse 3 Line input XLR balanced
15. iority input The emergency source must be able to supply the 2 24 V 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 terminals 14 Application example for use of the LBB1938 control terminals see fig 4 4 You can use up to six LBB1938 boosters in combination with the Plena LBB1925 10 System Pre amplifier to build a powerful multi zone sound system Zone switching of background music and calls is done via the LBB1925 10 zone relays in combination with the LBB1938 control terminals The LBB1925 10 controls the background music by distributing 24 Vdc via the music zone relays to the LBB1938 input 2 enable control terminals 14 The LBB1925 10 controls the calls by distributing 24 Vdc via the call zone relays to the LBB1938 input 1 priority control terminals 15 Each booster serves one loudspeaker zone Each zone can be OFF or receive music or a call Bosch Security Systems 2003 09 3922 988 92983en Plena Booster Vas e Hi allation and Operating ernal settings and connectio en 15 4 4 100 V slave input LBB1930 LBB1935 L line in 3 24V DC IN Line fuse G O 250V TIA tine out Warning This apparatus must be earthed e fi 230V 240V
16. n to connect the booster amplifier to another booster amplifier if more power is needed Each power amplifier must be connected to its own set of loudspeakers Do not connect booster outputs to each other The LBB1930 and LBB1935 have both XLR 3 and 5 and phone jack connectors 4 and 6 for input and loopthrough For the LBB1938 use program line input 2 4 and line loopthrough 2 6 for normal operation without priority Volume control Use the volume control next to the line input to set the output level of the booster amplifier Bosch Security Systems 2003 09 3922 988 92983en a Booster Amplifie allation and Operating Manua ernal settings and connectio en 14 4 3 nen the priority input and using the control terminals LBB1938 only LBB1925 10 Zone 1 output Zone 2 output LBB1938 f LBB1938 demo ET fr s a RG i Qe m T to next zones Figure 4 4 Next to the program input Input 2 Program the booster amplifier LBB1938 is also provided with a balanced priority input Input 1 Priority for connection to another preamplifier or mixer Apply a control voltage of 2 24 V to the input 1 priority control terminals 15 to switch ON the priority input 1 and mute the program input 4 In this way a local music source can be connected to the program input and a remote emergency system to the pr
17. perature of the booster reaches a critical limit due to poor ventilation or overload an overheat protection circuit switches OFF the power stage LBB1938 only The overheat indicator 4 lights up 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 2003 09 3922 988 92983en 6 Technical data 61 Electrical Mains voltage LBB1930 00 LBB1935 00 LBB1930 50 LBB1935 50 LBB1938 00 Max mains power consumption LBB1930 x0 LBB1935 x0 LBB1938 00 Max mains inrush current LBB1930 00 LBB1930 50 LBB1935 00 LBB1935 50 LBB1938 00 Battery voltage Max battery current LBB1930 x0 LBB1935 x0 LBB1938 00 6 2 Performance Frequency response Distortion S N flat at max volume LBB1930 x0 LBB1935 x0 LBB1938 00 6 3 Inputs and Opera en 19 230 240 Vac 10 50 60 Hz 110 Vac 10 50 60 Hz 230 Vac 10 50 60 Hz 400 VA 800 VA 1600 VA 8A 16A 9A 19 A 19A 24 Vdc 20 10 6A 11A 30 A 50 Hz 20 kHz 1 3 dB 10 dB ref rated output lt 1 rated output 1 kHz gt 80 dB gt 85 dB gt 90 dB Line input 3 pin XLR 6 3 mm phone jack balanced LBB1930 x0 LBB1935 x0 Sensitivity Impedance CMRR 1V 20 kOhm gt 25 dB 50 Hz 20 kHz Line input 1 2 3 pin XLR balanced LBB1938 00 Sensitivity Impedance CMRR
18. tems 2003 09 3922 988 92983en For more information visit www boschsecuritysystems com Bosch Security Systems B V Data subject to change without notice 2003 09 3922 988 92983en BOSCH
19. y recommended by the manufacturer An appliance and cart combination should be moved with care Quick stops excessive force and uneven surfaces may cause the appliance and cart combination to overturn Ventilation Openings in the enclosure if any are provided for ventilation and to ensure reliable operation of the unit and to protect it from overheating These openings must not be blocked or covered The unit should not be placed in a built in installation unless proper ventilation is provided or the manufacturer s instructions have been adhered to Power sources Units should be operated only from the type of power source indicated on the marking label If you are not sure of the type of power supply you plan to use consult your appliance dealer or local power company For units intended to operate from battery power or other sources refer to the Installation and User Instructions Grounding or polarisation This unit may be equipped with a polarised alternating current line plug a plug having one blade wider than the other This plug will fit into the power outlet only one way This is a safety feature If you are unable to insert the plug fully into the outlet try reversing the plug If the plug still fails to fit contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the polarised plug Alternatively this unit may be equipped with a 3 wire grounding type plug having a third grounding
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