Atex BExL25D User manual

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EuropeanSafetySystemsLtd. Impress House, MansellRoad, Acton, London [e-mail] Tel: [phone]
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DocumentNo. IS2423-PIssue B17-04-02 Sheet1of 4(1)
INSTRUCTIONMANUAL(ATEX)
BExL25Dand BExL15DFlameproofLoudspeakers
1)Introduction
TheBExL25DandBExL15Daresecondgeneration
flameproofloudspeakerswhicharecertifiedtotheEuropean
StandardsEN50014:1992 andEN50018:1994andmeet
therequirementsofthe ATEXdirective94/9/EC.The
loudspeakerscan be used inhazardousareaswhere
potentiallyflammableatmospheresmaybepresent. There
arethree versionsofeachloudspeaker,8ohm,16ohmor
100VLinetransformer.On100Vlinetransformerunitsthere
arefouroutputtappingsforeachsizeofloudspeaker.The
BExL25Dunitproducesoutputlevelsinthe117dB(A)range
andtheBExL15Dunit producesoutput levelsinthe112dB(A)
range.Bothloudspeakerscan be usedinZone 1andZone 2
areaswithgasesingroupsIIA,IIBandIICandtemperature
ClassificationsofT1, T2, T3andT4.
2)Marking
All unitshavearatinglabel,whichcarriesthefollowing
important information:-
UnitType No. BExL25DorBExL15D
Impedance: 8ohmor16ohm
100VLine
Code: EExdIICT4(Tamb. –50 to+55°C)
CertificateNo. KEMA99ATEX6312
Warnings:DONOTOPENWHENANEXPLOSIVE
GAS ATMOSPHEREISPRESENT
COVERBOLTSCLASS A4-80
USEHEATRESISTINGCABLESANDCABLE
GLANDS
(Rated 95ºC)ATAMB.TEMPERATURESOVER
40ºC
YearofConstruction/
SerialNo. i.e. 02 / 1L23000001
3) TypeApprovalStandards
Theloudspeakershavean ECType examinationcertificate
issuedbyKEMAandhavebeenapprovedtothefollowing
standards:-
EN50014: 1992 +prA1GeneralRequirements
EN50018: 1994 +prA1FlameproofEnclosure‘d’
4) Installation Requirements
Theloudspeakersmustbeinstalled inaccordancewiththe
latestissuesoftherelevantpartsoftheBS EN60079
specificationsortheequivalentIECspecifications–
Selection,Installationandmaintenanceofelectrical
apparatusforuseinpotentiallyexplosiveatmospheres(other
thanminingapplicationsorexplosiveprocessingand
manufacture):-
BS EN60079-14 : 1997 ElectricalInstallationsinHazardous
Areas(otherthan mines)
BS EN60079-10 : 1996 Classification of HazardousAreas
Theinstallationoftheunitsmustalsobeinaccordancewith
anylocalcodesthatmayapplyandshouldonlybe carried
outbyacompetentelectricalengineerwhohashadthe
necessarytraining.
5) Zones,Gas Group, Categoryand Temperature
Classification
TheBExL25DandBExL15Dloudspeakershavebeen
certifiedEExdIICT4(Tamb. –50to+55ºC).Thismeansthat
theunitscan be installedinlocationswiththefollowing
conditions:-
Area Classification:
Zone1 Explosivegasairmixturelikelytooccurin
normaloperation.
Zone2 Explosivegasairmixturenotlikelytooccur,
andifit does, it will onlyexist forashort time.
GasGroupings:
GroupIIA Propane
GroupIIB Ethylene
GroupIIC HydrogenandAcetylene
EquipmentCategory: 2G
TemperatureClassification:
T1 400oC
T2 300oC
T3 200oC
T4 135oC
AmbientTemperatureRange:
-50°Cto+55°C
6) LoudspeakerLocation and Mounting
Thelocationoftheloudspeakersshouldbe made withdue
regardtotheareaoverwhichtheunitmustbe audible.The
loudspeakersshouldonlybe fixedtoservicesthatcan carry
theweight oftheunit.
0344
II 2G
Epsilonx:
GasGroupand
Category:
CEMarking:
NotifiedBodyNo.

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DocumentNo. IS2423-PIssue B17-04-02 Sheet2of 4(2)
Theloudspeakersshouldbesecurelyboltedtoasuitable
surfaceusing the7mmdiameterboltholesinthestainless
steelUshaped mountingbracket(see figure1).Theangle
can thenbe adjustedinthedirectionthatthesoundis
primarilyrequired tocover.Thiscan beachievedby
looseningthetwolargebracketscrewsinthesideof the unit,
whichallowadjustmentinstepsof18°.Oncompletionof the
installationthetwolarge bracketadjustmentscrewsonthe
sideof theunitmustbe fullytightened toensurethattheunit
cannot moveinservice.
7) SafetyWarning (ElectrostaticHazard)
TheacoustichornsectionismadeofABSPlastic,therefore
toavoidapossibleELECTROSTACTICCHARGEtheunit
must onlybe cleanedwithadampcloth.
8) Access to theFlameproofEnclosure
Inordertoconnecttheaudiosupplycablestothe
loudspeakerit isnecessarytoremovetheflameproofcoverto
gainaccesstothe flameproofchamber.Toachievethis
removethefourM6hexagonsocketheadscrews(see figure
2)andwithdrawtheflameproofcovertakingextremecarenot
todamage theflameproofjointsintheprocess.
Notethefour M6screwsareClass A4-80 stainlesssteel
andonlyscrewsofthiscategorycanbeusedonthese
loudspeakers. It isthereforeimportant that thesescrewsand
theirspringwashersarekeptinasafeplaceduring
installation.
Oncompletionofthecablewiringinstallationtheflameproof
jointsshouldbe inspected toensurethattheyareclean and
thattheyhavenotbeendamaged duringinstallation.Also
checkthattheearthbondingwirebetweenthetwocasting
sectionsissecureandthe‘O’ringsealisinplace.When
replacingtheflameproofcovercastingensurethat it issquare
withtheflameproofchambercastingbeforeinserting.
Carefullypushthecoverinplaceallowingtimefortheairto
be expelled.Onlyafterthecoverisfullyinplace,shouldthe
fourM6StainlessSteelA4-80coverboltsandtheirspring
washersbe inserted andtightened down.If thecoverjams
whileitisbeinginserted,carefullyremoveitandtryagain.
Neverusethecoverboltstoforcethecoverintoposition.
9) PowerAmplifierSelection
Itisimportantthattheloudspeakersareconnectedtopower
amplifiersthathaveoutputsthatarecompatibletothe typeof
loudspeakerbeingused.Loudspeakerswitha100Vline
matchingtransformerfittedmustbeconnectedtoapower
amplifierwitha100Vlineoutput. Lowimpedance8ohmor
16 ohmloudspeakersmustbeconnected toamplifierswitha
suitablelowimpedanceoutput. Whenselectingthecablesize
considerationmustbegiventothecurrentthateachunit
draws,thenumberof loudspeakersontheline andthelength
ofthecableruns.
Thefollowingtableshowstherange ofloudspeakers:-
UnitTypeInputWattageMax.
I/P
Volts
BExL25D100VLine25W100V
BExL25D8ohm25W14.14V
BExL25D16 ohm25W20V
BExL15D100VLine15W100V
BExL15D8ohm15W10.95V
BExL15D16 ohm15W15.49V
TheabovetablealsoshowsthemaximumACsignalvoltages
at whichtheloudspeakerscan be operated.
Thecurrentlevelstakenbytheeachloudspeakerwill depend
onwhichoutputtappinghasbeenselected(seesection13of
thisinstructionmanual).BExL25D100VLineunitshave
outputlevelsof25W,12.5W,6Wand 2W,BExL15D100V
Lineunitshaveoutput levelsof15W,7.5W,3Wand1W.
10) CableSelection
Whenselectingthecablesizeconsiderationmustbegivento
thecurrentthateachunitdraws,thenumberof loudspeakers
onthelineandthelengthofthecableruns.
SAFETYWARNING: Ifthe loudspeakersareusedathigh
ambienttemperatures,i.e.over+40ºC,thenthecableentry
temperaturemayexceed +70ºCandthereforesuitableheat
resistingcablesmustbeused,witharated service
temperatureofat least 95ºC.
Figure1
Flameproof
Chamber
Flameproof
Cover
S/SMounting
Bracket
Figure2
4off M6CoverScrews
ExternalEarth
Terminal
PlasticAcousticHorn
Pleasesee SafetyWarning
in Section 7of thismanual

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DocumentNo. IS2423-PIssue B17-04-02 Sheet3of 4(3)
11) Earthing
All loudspeakersmustbeconnected toagoodqualityearth.
Theunitsareprovidedwithinternalandexternalearthing
terminalswhicharebothlocated ontheflameproofcover
sectionoftheunit (see figures2and3).
Whenusingtheexternalearthterminalacablecrimplug
mustbe used.Thecablelugshouldbe locatedbetweenthe
twoM5stainless steelflatwashers.TheM5stainlesssteel
springwashermustbe fixed betweentheouterflatwasher
andtheM5stainless steelnuttoensurethatthecablelugis
secured against looseningandtwisting.
Theinternalearthbondingwireensuresthatagoodquality
earthismaintained betweentheflameproof chambercasting
andtheflameproofcovercasting.
12) CableGlands
TheBExL25DandBExL15Dloudspeakershavedualcable
glandentrieswhichhavean M20 x1.5entrythreadas
standardoraPG13.5threadasaspecial.Onlycableglands
approvedforEx‘d’applicationscan beused,whichmustbe
suitableforthe typeofcablebeing usedandalsomeetthe
requirementsoftheEx‘d’flameproofinstallationstandard
BS EN60079-14 : 1997.
SAFETYWARNING: Ifthe loudspeakersareusedathigh
ambienttemperatures,i.e.over+40ºC,thenthecableentry
temperaturemayexceed +70ºCandthereforesuitableheat
resistingcableglandsmustbe used,witharated service
temperatureofat least 95ºC.
IfahighIP(IngressProtection)ratingisrequired thena
suitablesealingwashermust befitted underthecablegland.
Whenonlyonecableentryisusedtheotheronemustbe
closedwithanEx‘d’flameproofblankingplug, whichmust be
suitablyapprovedfortheinstallationrequirements.
13) CableConnections
Thecableconnectionsaremade intotheterminalblockson
thepcbassemblylocatedintheflameproofenclosure.See
section8ofthismanualforaccesstotheflameproof
enclosure.The100VLine loudspeakersarefittedwithafive
wayterminalblock.TerminalAiscommonandone ofthe
otherterminalsB, C, DorEshouldbe selecteddependingon
what output levelisrequired (seetablebelow).
A
B
C
D
E
TerminalsBExL25D(25W)BExL15D(15W)
A-B25W15W
A-C12.5W7.5W
A-D6W3W
A-E2W1W
Asinglewirewithacross sectionalareaofupto4mm²can
be connectedtoeachterminalwayorifan inputandoutput
wireisrequired two2.5mm²wirescan be connected toeach
terminalway.Whenconnectingwirestotheterminalsgreat
careshouldbetakentodress thewiresothat whenthecover
isinsertedintothechamberthewiresdonotexertexcess
pressureontheterminalblocks.Thisisparticularlyimportant
whenusingcableswithlarge crosssectionalareassuchas
2.5mm²andabove.
BExL25DandBExL15D8ohmand16 ohmlowimpedance
loudspeakershavedualinputterminalsonthepcbassembly
forinputandoutputwiring.Acableofupto2.5mm²can be
connected toeachterminal.If dclinemonitoringisused cut
thelinkontheboard(see figure5andsection14ofthis
manual).
2off M20
CableEntries
InternalEarthTerminal
Figure3
Internal
Bonding Wire
Terminal
Figure4
Figure5
BExL25DandBExL15D100VLineLoudspeakers
BExL25DandBExL15D8ohmand16 ohmLoudspeakers
-
-
+ +
Link

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DocumentNo. IS2423-PIssue B17-04-02 Sheet4of 4(4)
14) End ofLineDC Monitoring
OnBExL25DandBExL15Dloudspeakers,dclinemonitoring
can be usedifrequired.Boththe100VLineunitsandthe
LowImpedanceunitshaveablockingcapacitorfitted.It
shouldbenotedthateachloudspeakerhasa1Mohmbleed
resistorconnectedacrosstheblockingcapacitorandthis
shouldbetakenintoaccountwhenselectingthevalueof the
endoflinemonitoringresistance.
Theendoflinemonitoringresistorcan beconnected across
theterminalsontheendoflineunit. Onthelowimpedance
unitscaremustbetakenwiththepolarityofthemonitoring
voltage.
On100Vlineunitsthe end oflineresistorusedmusthavea
minimumresistancevalueof4k7ohmsandaminimum
wattage of2.5watts
Onlowimpedanceunitstheendoflineresistorusedmust
haveaminimumresistancevalueof2kohmsandaminimum
wattage of0.5wattsoraminimumresistancevalueof500
ohmsandaminimumwattage of2watts.Onthelow
impedanceunitscaremustbetakenwiththepolarityofthe
monitoringvoltage.If an endoflineresistorisfittedtoaunit
thelinksontheprintedcircuitboardsofall loudspeakersin
thelinemustbe cutforthedcblockingcapacitorstobein
circuit inordertodcmonitortheline(seefigure5).

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EuropeanSafetySystemsLtd. Impress House, MansellRoad, Acton, London [e-mail] Tel: [phone]
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DocumentNo. BExL25DandBExL15DEnglishIssue A(FourSheets)10-10-02 (5)
INSTRUCTIONMANUAL(ATEX)(GBR)
BExL25Dand BExL15DFlameproofLoudspeakers
2)Marking
All unitshavearatinglabel,whichcarriesthefollowing
important information:-
UnitType No. BExL25DorBExL15D
Impedance: 8ohmor16ohm
100VLine
Code: EExdIICT4(Tamb. –50 to+55°C)
CertificateNo. KEMA99ATEX6312
Warnings:DONOTOPENWHENANEXPLOSIVE
GAS ATMOSPHEREISPRESENT
COVERBOLTSCLASS A4-80
USE HEATRESISTINGCABLES ANDCABLEGLANDS
(Rated 95ºC)ATAMB. TEMPERATURES OVER40ºC
4)Installation Requirements
Loudspeakersmustbe installed inaccordancewiththe
followingorequivalent standards.
BS EN60079-14 : 1997 ElectricalInstallationsinHazardous
Areas(otherthan mines)
BS EN60079-10 : 1996 Classification of HazardousAreas
Installationshouldonlybe carried bycompetent personnel
andanylocalcodesofpracticeapplied.
5)Zones, GasGroup,Categoryand Temperature
Classification
Theunitscan be installed inlocationswiththefollowing
conditions:-
Area Classification:
Zone1 Explosivegasairmixturelikelytooccurin
normaloperation.
Zone2 Explosivegasairmixturenotlikelytooccur,
andifit does, it willonlyexist forashort time.
Gas Groupings:
GroupIIA Propane
GroupIIB Ethylene
GroupIIC HydrogenandAcetylene
EquipmentCategory: 2G
TemperatureClassification:
T1 400oC
T2 300oC
T3 200oC
T4 135oC
AmbientTemperatureRange:
-50°Cto+55°C
6)LoudspeakerLocation and Mounting
See drawing A
7)SafetyWarning (ElectrostaticHazard)
TheacoustichornsectionismadeofABSPlastic;therefore
toavoidapossibleELECTROSTACTICCHARGEtheunit
must onlybe cleanedwithadampcloth.
8)AccesstotheFlameproofEnclosure
SeedrawingB
Notethefour M6screwsareClass A4-80 stainlesssteel
andonlyscrewsofthiscategorycanbeusedonthese
sounders. Itisthereforeimportantthatthesescrewsand
theirspringwashersarekeptinasafeplaceduring
installation.
9)PowerAmplifierSelection
Itisimportantthattheloudspeakersareconnectedtopower
amplifiersthathaveoutputsthatarecompatibletothe typeof
loudspeakerbeingused.Loudspeakerswitha100Vline
matchingtransformerfittedmustbeconnectedtoapower
amplifierwitha100Vlineoutput. Lowimpedance8ohmor
16 ohmloudspeakersmustbeconnected toamplifierswitha
suitablelowimpedanceoutput. Whenselectingthecablesize
considerationmustbegiventothecurrentthateachunit
draws,thenumberof loudspeakersontheline andthelength
ofthecableruns.
Thefollowingtableshowstherange ofloudspeakers:-
UnitTypeInputWattageMax.
I/PVolts
BExL25D100VLine25W100V
BExL25D8ohm25W14.14V
BExL25D16 ohm25W20V
0344
II 2G
Epsilonx:
GasGroupand
Category:
CEMarking:
NotifiedBodyNo.

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DocumentNo. BExL25Dand BExL15DEnglishIssue A(FourSheets)10-10-02 (6)
BExL15D100VLine15W100V
BExL15D8ohm15W10.95V
BExL15D16 ohm15W15.49V
TheabovetablealsoshowsthemaximumACsignalvoltages
at whichtheloudspeakerscan be operated.
Thecurrentlevelstakenbytheeachloudspeakerwill depend
onwhichoutputtappinghasbeenselected(seesection13of
thisinstructionmanual).BExL25D100VLineunitshave
outputlevelsof25W,12.5W,6Wand 2W,BExL15D100V
Lineunitshaveoutput levelsof15W,7.5W,3Wand1W.
10)CableSelection
Cablesmustbe capableofhandlingthecurrentdrawnfrom
all oftheunitsontheline.
SAFETYWARNING: IfthehighoutputBExL25D
loudspeakersareusedathighambienttemperatures,i.e.
over+40ºC,thenthecableentrytemperaturemayexceed
+70ºCandthereforesuitableheatresistingcablesmustbe
used, witharated servicetemperatureofat least 95ºC.
11)Earthing
Loudspeakersunitsmustbeconnectedtoagoodquality
earth.Theunitsareprovided withinternalandexternal-
earthingterminals,whichare,bothlocatedontheterminal
chambersectionoftheunit(seefigures2and3).
Whenusingtheexternalearthterminalacablecrimplug
must be used. Thecablelugshouldbelocatedbetweenthe
twoM5stainless steelflat washers. TheM5stainless steel
springwashermust befixedbetweentheouterflat washer
andtheM5stainless steelnut toensurethat thecablelugis
secured against looseningandtwisting.
12)CableGlands
ThesoundershavedualcableglandentrieswithM20 x1.5
entrythreads.OnlycableglandsapprovedforEx‘d’
applicationscan be used,whichmustbesuitableforthetype
ofcablebeingusedandalsomeet therequirementsoftheEx
‘d’flameproofinstallationstandardBS EN60079-14 : 1997.
SAFETYWARNING: IfthehighoutputBExL25D
loudspeakersareusedathighambienttemperatures,i.e.
over+40ºC,thenthecableentrytemperaturemayexceed
+70ºCandthereforesuitableheatresistingcableglands
mustbeused,witharated servicetemperatureofatleast
95ºC.
IfahighIP(IngressProtection)ratingisrequired thena
suitablesealingwashermust befitted underthecablegland.
Whenonlyonecableentryisusedtheotheronemustbe
closedwithanEx‘d’flameproofblankingplug, whichmust be
suitablyapprovedfortheinstallationrequirements.
13)CableConnections
TerminalsBExL25D(25W)BExL15D(15W)
A-B25W15W
A-C12.5W7.5W
A-D6W3W
A-E2W1W
SeedrawingsCandD/ wiringdiagramE
14)End ofLineDC Monitoring
OnBExL25DandBExL15Dloudspeakers,dclinemonitoring
can be usedifrequired.Boththe100VLineunitsandthe
LowImpedanceunitshaveablockingcapacitorfitted.It
shouldbenotedthateachloudspeakerhasa1Mohmbleed
resistorconnectedacrosstheblockingcapacitorandthis
shouldbetakenintoaccountwhenselectingthevalueof the
endoflinemonitoringresistance.
Theendoflinemonitoringresistorcan beconnected across
theterminalsontheendoflineunit. Onthelowimpedance
unitscaremustbetakenwiththepolarityofthemonitoring
voltage.
On100Vlineunitsthe end oflineresistorusedmusthavea
minimumresistancevalueof4k7ohmsandaminimum
wattage of2.5watts
Onlowimpedanceunitstheendoflineresistorusedmust
haveaminimumresistancevalueof2kohmsandaminimum
wattage of0.5wattsoraminimumresistancevalueof500
ohmsandaminimumwattage of2watts.Onthelow
impedanceunitscaremustbetakenwiththepolarityofthe
monitoringvoltage.If an endoflineresistorisfittedtoaunit
thelinksontheprintedcircuitboardsofall loudspeakersin
thelinemustbe cutforthedcblockingcapacitorstobein
circuit inordertodcmonitortheline(seefigure5).

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DocumentNo. BExL25Dand BExL15DEnglishIssue A(FourSheets)10-10-02 (7)
Drawing A
Tightenscrewto
secure
Lossen screw
toadjust
Tighten screwtosecure.
Spænd skruen foratfastgøre.
Schroefaandraaien omvasttezetten.
Serrerlavispourunefixation sûre.
ZumSichernSchraube anziehen.
Stringerelaviteperilfissaggio.
Stramskruenforåfeste.
Aperteoparafusoparafixar.
Aprieteeltornilloparaasegurar.
Draåtskruven förattfästa.
Loosen screwtoadjust.
Løsnskruen forattilpasse.
Schroeflosdraaien omaftestellen.
Desserrerlavispourrégler.
ZumRegulieren Schraube lockern.
Allentarelaviteperpotereffettuarela
regolazione.
Løsne skruen foråjustere.
Desaperteoparafusoparaajustar.
Aflojeeltornilloparaajustar.
Lossaskruven föratt justera.
Drawing B
Drawing C
BExL25D&BExL15D100VLine
Drawing D
BExL25D&BExL15D
8ohmand16 ohm

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DocumentNo. BExL25Dand BExL15DEnglishIssue A(FourSheets)10-10-02 (8)
Wiring DiagramE
100VLinesource
BC D E
BExL25Dand BExL15D
100VLineUnits
A
A
BC D E BCD E
A
+-
BExL25D andBExL15D
8 and16 ohms units
+- +-
8or16 ohmsource

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DocumentNo. BExL25Dand BExL15DDanishIssue A(TwoSheets)10-10-02 (9)
INSTRUKTIONSMANUAL (ATEX)(DNK)
BExL25Dog BExL15D
Flammesikrehøjttalere
2)Mærkater
Alleenhederharenklassificeringsmærkat, derbærer
følgendevigtigeoplysninger:
Enhedstypenr. BExL25DellerBExL15D
Impedans:8ohmeller16ohm
100VLinie
Kode: EExdIICT4(Tamb. –50 til+55°C)
Certifikatnr. KEMA99ATEX6312
Advarsler:MÅIKKE ÅBNES
IEKSPLOSIV
GASATMOSFÆRE
DÆKBOLTEKLASSEA4-80
BRUGVARMEBESTANDIGEKABLEROGPAKDÅSER
(Mærket95ºC)VEDOMGIVENDETEMP.OVER40ºC
4)Installationskrav
Højttalereskalinstalleresioverensstemmelsemedfølgende
ellertilsvarende standarder.
BS EN60079-14 : 1997 Elektriskeinstallationerisundheds-
farlige områder(undtagen miner)
BS EN60079-10 : 1996 Klassifikation af sundhedsfarlige om-
råder
Installationbørkunudføresafkompetent personaleog under
iagttagelseaflokaleregler.
5)Zone-,gasgruppe-,kategori-og temperatur-
klassifikation
Enhedernekan installerespåområdermedfølgendeforhold:
Områdeklassifikation:
Zone1 Eksplosivgas-ogluftblandingkan forekomme
ved normaldrift.
Zone2 Eksplosivgas-ogluftblandingforekommer
sandsynligvisikke,oghvisdetsker,vil detkun
væreforenkort tidsperiode.
Gasgrupperinger:
GruppeIIA Propan
GruppeIIB Ethylen
GruppeIICHydrogenogacetylen
Udstyrskategori: 2G
Temperaturklassifikation:
T1 400oC
T2 300oC
T3 200oC
T4 135oC
Omgivendetemperatur:
-50°Ctil +55°C
6)Højttalerplacering og -montering
SeillustrationA
7)Sikkerhedsadvarsel(Elektrostatisk
sundhedsfare)
Delenmeddetakustiskehornerfremstilletaf ABS-plast, og
foratundgåenmuligELEKTROSTATISKLADNINGmåen-
hedenkun rengøresmedenfugtigklud.
8)Adgangtil flammesikkerindkapsling
SeillustrationB
Bemærk,atde fire M6skruerer klaseA4-80,rustfristål,
og dermåkunanvendesskruerafdennekategoripå
sounderne.Deterderforvigtigt, atskruerneog deres
fjederskiveropbevarespået sikkert sted underinstallation.
9)Valg afstrømforstærker
Detervigtigt, athøjttalerneerforbundettil strømforstærkere,
derharudgange kompatiblemed dentype højttaler,der
anvendes.Højttalereudstyretmed en100Vledningsafstem-
ningstransformerskalværeforbundettil enstrømforstærker
meden100Vledningsudgang.Lavimpedanshøjttaleremed
8ohmeller16 ohmskalværeforbundettil forstærkeremed
tilsvarende lavimpedansudgang.Nårkabelstørrelsen
vælges,skaldenstrøm,hverenhed trækker,antalletaf
højttalerepåledningenog længdenafkablertagesi
betragtning.
Nedenståendetabelviserudvalget afhøjttalere:
EnhedstypeInputWatt Maks.
I/PVolt
BExL25D100VLinie25W100V
BExL25D8ohm25W14,14V
BExL25D16 ohm25W20V
0344
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DocumentNo. BExL25Dand BExL15DDanishIssue A(TwoSheets)10-10-02 (10)
BExL15D100VLinie15W100V
BExL15D8ohm15W10,95V
BExL15D16 ohm15W15,49V
OvenståendetabelviserogsådemaksimaleAC-signalspæn-
dinger, somhøjttalernekan fungereved.
Strømniveauerneforhverhøjttalerafhængerafdetvalgte
viklingsudtag(seafsnit13iinstruktionsmanualen).BExL25D
100Vlinieenhederharudgangsniveauerpå25W,12.5W, 6W
og 2W, BExL15D100Vlinieenhederharudgangsniveauerpå
15W,7.5W, 3Wog1W.
10)Kabeludvalg
Kablerneskalkunnehåndteredensamledestrømfraallean-
vendteenheder.
SIKKERHEDSADVARSEL: HvisdehøjtydendeBExL25D-
højttalereanvendesvedhøjeomgivendetemperaturer,dvs.
over+40ºC,kan kabletsindgangstemperaturoverstige
+70ºC,ogderskalderforanvendespassende
varmebestandige kablermed ennominelarbejdstemperatur
påmindst 95ºC.
11)Jordforbindelse
Højttalerenhederskalværeforbundet tilen
jordforbindelseaf højkvalitet. Enhedernehar
indvendigeogudvendigejordklemmer, derbegge
befindersigpåenhedensklemkammerdel(sefigur2
og3).
Nårdenudvendige jordklemmelanvendes, skalderbruges
enkabelklemmesko. Kabelskoenskalbefindesigmellemto
flade M5-spændeskiverr afrustfrit stål. DerustfristålM5-
spændeskiverskalfastgøresmellemdenydrefladeskiveog
M5-møtrikkenafrustfrit stålforat sikre, atkabelskoenikke
løsnerellervridersig.
12)Kabelafslutning
Højttalerehardobbeltekabelafslutningsindgange medM20
x1,5indgangsgevind.Kun kabelafslutningergodkendttil Ex
‘d’-applikationermåanvendesog skalpassetil dentype
kabel,deranvendessamtopfyldekraveneiEx‘d’,standard
forflammesikkerinstallationBS EN60079-14: 1997.
SIKKERHEDSADVARSEL: HvisdehøjtydendeBExL25D-
højttaleranvendesvedhøjeomgivendetemperaturer,dvs.
temperaturerover+40ºC,kan kabletsindgangstemperatur
overstige+70ºC,og derskalderforanvendespassende
varmebestandige kablermed ennominelarbejdstemperatur
påmindst 95ºC.
HvisderkrævesenhøjIP-klassificering(beskyttelsemod
indtrængen), skaldermonteresenegnet tætningsskiveunder
kabelafslutningen.
Nårderkun anvendesenkabelindgang, skaldenandenluk-
kesmed enEx‘d’, flammesikkerblindprop, derskalvære
korrekt godkendt ioverensstemmelsemedl
installationskravene.
13)Kabelforbindelser
TerminalBExL25D(25W)BExL15D(15W)
A-B25W15W
A-C12.5W7.5W
A-D6W3W
A-E2W1W
SeillustrationenCog D/ SeledningsdiagramE
14)Linieslutovervågning (DC)
PåBExL25DogBExL15DhøjttalerekanderanvendesDC-
linieovervågning, hvispåkrævet. Både 100Vlinieenhederog
lavimpedansenhedererudstyret medenspærrekapacitetr.
Det børbemærkes, at hverhøjttalerharen1Mohmud-
tagningsmodstandforbundetpåtværsafspærrekapaciteten,
og at detteskaltagesibetragtning, nårværdienaf
linieslutovervågningsmodstandenvælges.
Modstandenforlinieslutovervågningenkanforbindespå
tværsafklemmernepålinieslutenheden. Pålavimpedansen-
hederneskalderudvisesforsigtighed, med over-
vågningsspændingenspolaritet.
På100Vlinieenhederskaldenanvendtelinieslutmodstand
haveenminimummodstandsværdipå4k7ohmogenmini-
mumwattnomineringpå2,5watt.
Pålavimpedansenhederskaldenanvendtelinieslutmodstand
haveenminimummodstandsværdipå2kohmoget
minimumwatt-talpå0,5watt ellerenminimum
modstandsværdipå500ohmoget minimumwatt-talpå2
watt. Pålavimpedansenhedernebørderudvisesforsigtighed
medovervågningsspændingenspolaritet. Hvisderer
monteret enlinieslutmodstandpåenenhed, skal
forbindelsernepådet tryktekredsløbskort påallehøjttalere
påledningenværetilpasset, såDC-
blokeringskondensatorernekan væreikredsløbet,forat DC-
overvåge ledningen(sefigur5).