MVPA / VPA Amplifier Manual V1.1
Contents
1. 240 Watt Amplifier Full Power 325 Watts 240 Watt Amplifier Half Power 300 Watts 240 Watt Amplifier 1 8 Power 175 Watts Automatic thermal shutdown Gain reduction while heatsink exceeds 85 C Audio Electrical Characteristics Input Impedance 10K ohms nominal electronically balanced Input Sensitivity OdBu 775mV for rated power Power Bandwidth 3dB 100Hz 20Khz Distortion THD Less than 1 at rated power typically less than 0 08 at 1Khz Noise 80dB max Fault Monitoring Built in monitoring circuitry Detection and display of individual Fitted in MVPA models only PowerBloc Fail Mains Fail Battery Fail and Charger Fail With general fault output to Monitoring System FMS Short circuit protection Indefinite operation into short cct load Mechanical Dimensions HxWxD 133 8U x 483 x 310 rack mount 19 frame Audio connections Plug in connectors with screw terminals Mains connections E C mains connector DC supply connections 4 pin multiway connector Amplifier Finish Black Reliability Maintainability MTBF hours 90 000 hours MTTR i e fit replacement amp bloc 15 minutes Environment Operating temperature range C 5 C to 40 C Relative Humidity 0 95 Page 3 of 11 a gt 3 gt 21015 V1 1 7 TISYSTEMS MVPA VPA Amplifier User Manual 1 1 Amplifi2. ENGINEER eye AUDIX SYSTEMS AP POSN 1 NIP POSN2 MUP POSNS AN POSN 4 Amplifier Rear View r s AMP POSN 1 AMP POSN 2 AMP POSN a ANP POSN4 MODEL SERIAL No LE re0 Ean y sr sr sce sce Slave Slav vake UP E var ue ower Eee En IA IE E M me ia PB261 ae indicator 8 Unused position for Amplifier output ap in Fuse 13 DC Fuse entiometer pply input conn DC Supply inp ault bus ribbe an conr 7 TISYSTEMS Page 8 of 11 21015 V1 1 MVPA VPA Amplifier User Manual 2 1 2 2 SAFETY CONSIDERATIONS The electrical installation of which the amplifier PowerBloc is part must incorporate an all pole mains isolating switch with contact separation of at least 3mm The mains power supply cord to the amplifier unit must have conductor area at least 1mm2 The power cord must be BASEC or HAR approved with connectors complying with EN60320 and must provide a safety earth Audix systems standby battery supply units Models SBS241 SBS242 or SBS481 all include a separate fuse on each 24V dc output The fuse rating on the feed to a 240 Watt amplifier should be 25A anti surge T25AH Where a 24V DC standby supply is connected the DC feed to the amplifier should be fused at source with a supply fuse rating of 25A anti surge T25AH The amplifier should not be exposed to dripping or splashing and any liquids Safety Considerations for System Maintenance Only a quali
3. If an amplifier frame is to be moved the appropriate lifting code of practice should be followed Approximate frame weight is 14 16Kg s Depending on particular model Maintenance Although MVPA amplifiers require little or no maintenance the Public Address or Voice Alarm system to which it is installed may require regular scheduled maintenance For BS5839 compliant Voice Alarm systems please refer to BS5839 Part 1 Code of practice for system design installation and servicing for recommend maintenance levels It is recommended that all members of staff should be urged to report problems with the PublicAddress or Voice Alarm system i e distortion speakers not operating poor coverage to the department responsible for the maintenance of such equipment For assistance please contact our Customer Services Department to obtain advice on planned maintenance and Service Contracts Page 10 of 11 al e 2 7 21015 V1 1 y TISYSTEMS
4. MVPA VPA Amplifier User Manual QA Audix Systems N Station Road Wenden Saffron Walden Essex CB11 4LG Telephone 44 0 1799 540888 7 SO I SYSTEMS Facsimile 44 0 1799 541618 www tycosafetyproducts europe com www audixsystems co uk Willy MVPA VPA Amplifier Manual V1 1 Page 1 of 11 Y Qui 210151 Usvstems MVPA VPA Amplifier User Manual Revision History Versio Modifications Date 1 0 Initial Draft 09 07 2001 1 1 Revised 18 06 2002 Copyright Audix Systems 2005 DISCLAIMER This manual contains information that is correct to the best of Audix Systems knowledge It is intended to be a guide and should be used as such It should not be considered as a sole source of technical instruction replacing good technical judgement since all possible situations cannot be anticipated If there are any doubts as to exact installation configuration and or use call Audix Systems at 44 0 1799 540888 ACKNOWLEDGEMENTS All trademarks are recognised Technical Support In the unlikely event of you having problems with your Amplifier please contact our Customer Services Department Audix Systems Station Road Wenden Saffron Walden CB11 4LG Tel 01799 540888 Fax 01799 541618 Page 1 of 11 al gt a z f 21015 V1 1 7 TISYSTEMS MVPA VPA Amplifier User Manual CONTENTS REVISION IS TO A Y as 1 TECHNICAL SUPPORT 0cccccsccceeecceececeecc
5. eeaceenseceeseeeaeeceescneneeneeeaeaneeeaseneesaeaaeeenesauassenaesanseanenenees 1 1 SPECIFICATION 0000 ic dai 3 1 1 AMPLIFIER MODEL RANGE isisisi 4 1 2 AMPLIFIER INTRODUCTION cccccccccccossscsccccsescsscsescesesescesesesvereseaseees 4 1 3 AMPLIFIER SLEEP MODE 5 1 4 AMPLIFIERS CHASSIS FRONT PANEL DISPLAYS 5 1 5 AMPLIFIER ADJUSTMENTS LINK SETTINGS 5 1 6 AMPLIFIER PANEL ARRANGEMENT MVPA1202 8 2 SAFETY CONSIDERATIONS 00 cceecccescccesceeececeeeceeacecneecneeeeeaeeaesenaneeenesaeeeeneaeeneees 9 2 1 Safety Considerations for System Maintenance oooooooconnicninicininccinn 9 2 2 Electrical Hazards dar s 9 2 3 A A O RAR 10 2 4 Welght Hazards ocooiooiiiiiiiciiiii ibi 10 3 MAINTENANCE 00000 ee o 10 ps 3 Page 2 of 11 21015 V1 1 Uisvstems MVPA VPA Amplifier User Manual 1 Specification Power Requirements AC DC Amplifier chassis voltage requirements 230 volts AC 50 60Hz with automatic reversion to 24VDC during AC failure AC inrush current 10A maximum for less than 1 second non Chassis fitted with 4 x 60 Watt repetitive typically lt 7 5A PowerBlocs 1 x 60 Watt RMS PowerBloc 160VAC 6 5ADC Max 2 x 60 Watt RMS PowerBloc 320VAC 13ADC Max 3 x 60 Watt RMS PowerBloc 480VAC 19 5ADC Max 4 x 60 Watt RMS PowerBloc 640VAC 26ADC Max Power Factor 0 85 at maximum power Heat Dissipation Watts
6. er Model Range Audix Output Weight 24VDC 230AC 24VDC 230VAC Systems Channel mA mA A A Model No s Quiescen Quiescen Max Max t t MVPA601 1 x 60W 10Kg 130 57 6 5 0 7 MVPA602 2 x 60W 12Kg 200 64 13 1 4 MVPA603 3 x 60W 14Kg 270 71 20 MVPA604 4 x 60W 16Kg 340 78 26 2 78 MVPA1201 1x 12Kg 145 60 13 1 4 120W MVPA1202 2x 16Kg 230 70 26 2 78 120W MVPA1260 1x 14Kg 215 67 20 2 120W 1 x 60W MVPA1262 1x 16Kg 285 74 26 2 78 120W 2 x 60W MVPA1801 1x 14Kg 160 63 20 2 180W MVPA1860 1x 16Kg 230 70 26 2 78 180W 1 x 60W MVPA2401 1x 16Kg 175 66 26 2 78 240W 1 2 Amplifier Introduction Audix Systems 60 watt PowerBloc amplifier modules are used individually or combined to provide 100 Volt line outputs of 60 120 180 or 240 Watts R M S A rack mounting chassis power supply occupying 3U of space holds up to four PowerBloc modules which may be arranged as four totally independent 60 watt amplifiers or in any of ten other output configurations see paragraph 1 2 Amplifier model range for details Using proven MOSFET circuit techniques results in an efficient and extremely reliable power amplifier The amplifiers are protected from short circuit speaker lines by current limiting on the output stage The amplifiers are protected from persistently being over driven by a thermal cut out which is triggered at 85 C decreasing the amplifier input drive to reduce the output stage power dissipation Modules operating in paralle
7. fied and trained electronics engineer should be permitted to make any type of adjustment or repair to the Public Address or Voice Alarm System The following safety factors should be considered before attempting to maintain or repair an amplifier e Electrical e Heat e Weight Electrical Hazards High Voltages exist within this apparatus e 230 volt mains e 100V line An power frame primary supply is 230v AC 50 60Hz This is connected by means of an IEC fused inlet This equipment does not include a mains isolation switch therefore the Mains must be disconnected from the apparatus before any part of the casing is removed Insulated shrouds protect the mains supply within the apparatus No part of the mains supply can be easily touched unless these internal covers are removed Battery Backup Where the amplifier has a secondary supply i e 24Volt Battery backup Page 9 of 11 K e F 7 21015 V1 1 7 TISYSTEMS MVPA VPA Amplifier User Manual 2 3 2 4 The battery supply must be also be disconnected before any part of the casing is removed Heat Hazards There is a potential temperature hazard around the rear an amplifier frame The MVPA power amplifier heat sinks may become Very Hot This is generally when an alarm has been broadcast for a long period of time Heating may also occur if the amplifier power block is in a fault condition Weight Hazards Warning Amplifier frames are heavy
8. ier VPA MVPA MONITORING POWER OON lt Grn Power ON LED o2 Power Bloc Fail Output Stc Amp Fail 2 current check d every 30 set VEQLOK ae current checked every 30 sec Not Used AUDIX AUDIX SYSTEMS SYSTEMS Amplifier Adjustments Link Settings A maximum of 4 PowerBlocs can be fitted inside a chassis A 240W unit is fitted with 4 PowerBlocs one of which is a master MPB260 while three are slave units MPB261 The link settings on Master Slave Blocs are as follows Note All adjustments are factory set No further adjustments should be necessary MPB160 Master VR1 Fine Gain Control VR2 Quiescent Current MPB161 Slave Page 5 of 11 al gt e z 7 21015 V1 1 7 TISYSTEMS MVPA VPA Amplifier User Manual VR1 Not fitted VR2 Quiescent Current Front panel mounted lockable gain adjustment controls can be fitted optional to each Master PowerBloc This allows user adjustment of audio levels during system commissioning which can be locked once set Page 6 of 11 aW e E J 21015 V1 1 y TISYSTEMS MVPA VPA Amplifier User Manual intervals are Link Settings for MPB260 amp 261 J1 Master Slave This 2 way jumper allows the Master Bloc to wake up other associated slave Blocs in the same chassis J2 When fitted the audio input causes the amplifier to wake up Lk1 When not fitted the amplifier is permanentl
9. l share a single input driver stage Input level controls may be fitted to all combinations of PowerBlocs as appropriate The output power of existing units can be increased at any time by the addition of more PowerBloc output modules subject to available space in the mainframe y SS gt En 4 Ys YSTEMS Page 4 of 11 21015 V1 1 MVPA VPA Amplifier User Manual 1 3 1 4 1 5 Amplifier Sleep Mode While the system is idle all amplifiers are automatically set in sleep mode to reduce power consumption This is particularly important while the AC mains supply has failed and the system is running on internal batteries In order to allow the 20Khz surveillance signal through the system the control matrix feeds a wake up signal to all power amplifiers The purpose of this signal is to command Audix MOSFET PowerBlocs to switch from their very low power consumption mode asleep to their quiescent state awake This allows the surveillance tone to pass through amplifiers without missing the first part of the signal During normal speech announcements or alarms only the amplifiers selected for broadcast wake up In this case the wake up is initiated by the audio at the input terminals of each amplifier This ensures that any amplifiers NOT being used for broadcast remain in sleep mode Amplifiers chassis Front Panel Displays Faults can be detected and displayed on MVPA versions of the amplif
10. y awake Monitor Board D678 Link Settings J1 If fitted the sample rate changes from 30 to 4 seconds This link is temporarily fitted during PCB testing All PCB s factory set at 30 seconds J2 Jumper not fitted if amplifier fitted in slot position 1 J3 Jumper not fitted if amplifier fitted in slot position 2 J4 Jumper not fitted if amplifier fitted in slot position 3 J5 Jumper not fitted if amplifier fitted in slot position 4 CHG Fitted if system includes a battery charger BATT Fitted if system includes back up batteries Important Note The current amplifier PowerBloc range is MPB260 Master and MPB261 Slave Older versions include 160 161 60 and 61 When fitting PowerBlocs into existing power frames ensure that different versions are NOT mixed I E 260 units should only be mixed with 261 units and 160 units should only be mixed with 161 units etc Page 7 of 11 al gt e z f 21015 V1 1 y TISYSTEMS MVPA VPA Amplifier User Manual 1 6 Amplifier Panel Arrangement MVP A1202 Amplifier Fre View MODULAR MOS FET POWER AMPLIFIER MONITORING aia o ri s warerooe 8 cancel O pae ot Sn O 3 6 o as A amoto E ae ls Oo a Se U
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