E2S BExL25E User manual

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EuropeanSafetySystemsLtd. Impress House, MansellRoad, Acton, [e-mail] Tel:[phone]
www.e2s.com Fax:[phone]
DocumentNo. IS2424-PIssue B17-04-02 Sheet 1of 4
INSTRUCTION MANUAL(ATEX)
BExL25EandBExL15E
Flameproof/Increased SafetyLoudspeakers
1)Introduction
TheBExL25E and BExL15Earesecondgenerationflameproof
/increased safety loudspeakers whicharecertifiedtothe
European StandardsEN50014:1992, EN50018:1994 and
EN50019:1994andmeettherequirements oftheATEX
directive94/9/EC. Theloudspeakerscan be usedin hazardous
areaswherepotentiallyflammableatmospheres maybe
present. There are three versionsofeachloudspeaker, 8 ohm,
16ohm or100VLinetransformer. On 100V linetransformer
unitsthere are four outputtappings foreachsizeof
loudspeaker. TheBExL25Eunit produces output levels in the
117dB(A)rangeand the BExL15E unitproduces output levels
in the112dB(A) range.Bothloudspeakerscan beused in
Zone1 and Zone2 areas withgases ingroups IIA, IIBand IIC
andtemperature ClassificationsofT1,T2, T3andT4.
2)Marking
Allunitshavearating label, whichcarriesthe following
important information:-
UnitType No. BExL25EorBExL15E
Impedance:8ohmor 16ohm
100V Line
Code: EExdeIICT4(Tamb. –50to+55°C)
CertificateNo. KEMA99ATEX6312
Warnings:DONOTOPENWHENANEXPLOSIVE
GASATMOSPHEREISPRESENT
COVERBOLTSCLASS A4-80
USEHEATRESISTINGCABLES ANDCABLEGLANDS
(Rated 95ºC)ATAMB.TEMPERATURES OVER40ºC
Year of Construction/
Serial No.i.e. 02 / 1L43000001
3) TypeApprovalStandards
Theloudspeakershavean EC Typeexaminationcertificate
issuedbyKEMAandhavebeenapprovedtothe following
standards:-
EN50014: 1992 +prA1 General Requirements
EN50018: 1994 +prA1 Flameproof Enclosure‘d’
EN50019: 1994 +prA1 IncreasedSafety‘e’
4) InstallationRequirements
The loudspeakersmustbe installedin accordance withthe
latestissuesofthe relevantpartsof theBSEN 60079
specificationsorthe equivalentIEC specifications –Selection,
Installationandmaintenance of electrical apparatus foruse in
potentially explosiveatmospheres (otherthanmining
applications or explosiveprocessingandmanufacture):-
BS EN60079-14 : 1997 ElectricalInstallationsinHazardous
Areas(otherthan mines)
BS EN60079-10 : 1996 Classificationof HazardousAreas
The installationoftheunitsmustalsobe in accordance with
anylocal codesthat may apply and should onlybe carried out
byacompetentelectricalengineerwhohasthenecessary
training.
5) Zones,GasGroup,Categoryand Temperature
Classification
The BExL25E and BExL15E loudspeakershave been certified
EEx deIIC T4(Tamb. –50 to+55ºC). Thismeansthat the units
canbe installed in locationswith thefollowingconditions:-
AreaClassification:
Zone 1 Explosivegasair mixturelikely tooccurin
normal operation.
Zone 2 Explosivegasair mixturenot likely to occur,
andifit does, it will only existfor ashort time.
GasGroupings:
GroupIIA Propane
GroupIIB Ethylene
GroupIIC Hydrogen andAcetylene
EquipmentCategory: 2G
TemperatureClassification:
T1 400oC
T2 300oC
T3 200oC
T4 135oC
Ambient Temperature Range:
-50°C to+55°C
6) LoudspeakerLocationand Mounting
The locationoftheloudspeakersshouldbemade withdue
regardtotheareaoverwhich the unitmustbeaudible. The
0344
II2G
Epsilonx:
GasGroupand
Category:
CE Marking:
NotifiedBody No.

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DocumentNo. IS2424-PIssueB17-04-02 Sheet2of4
loudspeakersshould onlybefixedto servicesthatcancarry
the weight ofthe unit.
Theloudspeakersshouldbe securely bolted to asuitable
surface usingthe7mmdiameter boltholesin the stainlesssteel
Ushaped mountingbracket(seefigure 1). Theanglecanthen
beadjustedin thedirection that the soundis primarily required
tocover. Thiscan beachievedbyloosening the two large
bracketscrews in theside of the unit,which allowadjustment
in steps of 18°. Oncompletion of the installation the two large
bracketadjustment screwsontheside of the unit mustbe fully
tightenedtoensure thattheloudspeaker cannot movein
service.
7) SafetyWarning (ElectrostaticHazard)
The acoustic horn sectionis made of ABSPlastic,therefore to
avoidapossibleELECTROSTACTIC CHARGEthe unitmust
only be cleanedwith a damp cloth.
8) Access totheFlameproofEnclosure
Access totheflameproofenclosure willnotnormallybe
necessary asthecablesenter the unitin theEx ‘e’Increased
Safety Terminationenclosure. Accesswillonlybe required if
you need tofitan endonlinemonitoringcomponent(see
section15ofthismanual). Togain access tothe flameproof
enclosure,removethefour M6hexagonsocket headscrews
(seefigure 2)and withdrawtheterminal chambertaking
extremecarenottodamagetheflameproofjointsin the
process.
Notethefour M6screwsareClassA4-80stainlesssteel
andonlyscrewsof thiscategorycanbeused on these
sounders. Itis therefore importantthatthese screws and their
springwashersarekept in a safe place duringinstallation.
Oncompletionofthefittingofthemonitoringcomponent the
flameproofjoints should beinspected toensurethatthey are
clean andthat theyhavenot beendamaged duringinstallation.
Alsocheckthatthe earthbondingwire between thetwo
casting sections is secureand thatthe ‘O’ring seal is in place.
Whenreplacing the terminal chambersectioncasting,ensure
thatit issquare withthe flameproofchambercastingbefore
inserting.Carefully pushthe sectioninplace allowingtime for
the air tobeexpelled.Only afterthesectionisfully inplace
shouldthe four M6 Stainless Steel A4-80 coverbolts and their
spring washers beinserted andtighteneddown.Ifthesection
jamswhileit is beinginserted,carefully removeit andtry
again. Never usetheM6 coverboltstoforcethecoverinto
position.
9) Access totheIncreasedSafetyTerminal
Chamber
Toconnectthecablestothe loudspeakerit is necessary to
removethe terminalcovertogainaccess tothetermination
chamber. To achieve this removethefour M4 hexagonsocket
headscrews(see figure 2). ThefourM4 screws and their
springwashersare grade A4 stainlesssteelandtheyshould
be keptin asafe placeduring installation. Before replacing the
terminalcoverensure thatthe earth bonding wire between the
two castingsissecureandthatthe‘O’ ringseal is inplace.
Insert thefour M4hexagonscrewsandtheir spring washers
and tighten them down.
10) PowerAmplifierSelection
Itisimportant thattheloudspeakersareconnectedto power
amplifiersthat haveoutputsthat arecompatibletothetype of
loudspeakerbeing used. Loudspeakers witha100Vline
matchingtransformer fittedmustbeconnectedtoapower
amplifier witha100Vline output. Low impedance 8 ohm or16
ohm loudspeakersmustbe connectedto amplifierswith a
suitable lowimpedance output.
Figure 1
Flameproof
Chamber
Terminal
Cover
S/SMounting
Bracket
Figure2
Flameproof Chamber
4off M6CoverScrews
ExternalEarth
Terminal
Figure3
InternalBonding
WireTerminal
IncreasedSafety
Chamber
4offM4CoverScrews
Terminal
Chamber
1 2 3 4 5 6 7 8 9 10 11 12
2off M20
CableEntries
Inter
nalEarthTerminal
PlasticAcousticHorn
PleaseseeSafetyWarning
in Section 7of thismanual

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DocumentNo. IS2424-PIssueB17-04-02 Sheet3of4
Thefollowingtableshows the rangeof loudspeakers:-
UnitTypeInputWattageMax.
I/PVolts
BExL25E100VLine25W100V
BExL25E8ohm25W14.14V
BExL25E16 ohm25W20V
BExL15E100VLine15W100V
BExL15E8ohm15W10.95V
BExL15E16 ohm15W15.49V
Theabove tablealso shows the maximum ACsignalvoltages
at which the loudspeakerscanbe operated.
Thecurrentlevelstakenbytheeachloudspeakerwill depend
onwhich outputtapping has beenselected (see section14of
this instructionmanual). BExL25E 100V Line units haveoutput
levels of 25W,12.5W,6Wand2W,BExL15E100V Line units
haveoutputlevelsof 15W, 7.5W, 3Wand1W.
11) CableSelection
Whenselecting thecable sizeconsideration mustbegivento
the current that eachunit draws,thenumberofloudspeakers
onthelineandthelengthof thecableruns.
SAFETY WARNING: Iftheloudspeakers are usedathigh
ambienttemperatures,i.e.over+40ºC,thenthecable entry
temperature mayexceed +70ºCand thereforesuitable heat
resistingcablesmustbeused,witharatedservice
temperature of at least 95ºC.
12) Earthing
Allloudspeakers mustbeconnectedtoagoodquality earth.
Theunitsareprovidedwithinternaland externalearthing
terminalswhichare bothlocatedonthe terminalchamber
sectionoftheunit (seefigures 2and3).
Whenusing the external earthterminal acablecrimp lug must
be used. Thecablelugshouldbe located between thetwoM5
stainlesssteelflat washers.The M5 stainlesssteelspring
washermust befixedbetween theouterflat washerandthe
M5 stainlesssteelnut to ensurethat thecable lug is secured
againstlooseningandtwisting.
Theinternalearthbondingwiresensurethat agoodquality
earth is maintained betweentheflameproofchambercasting,
the terminalsection castingandtheterminal cover casting.
13) CableGlands
TheBExL25E andBExL15Eloudspeakershavedual cable
glandentrieswhich haveanM20 x1.5entrythreadasstandard
oraPG13.5thread asaspecial. Onlycableglandsapproved
forEx‘e’applications or better (i.e. Ex‘d’applications)can be
used.Theymust be suitable forthetype ofcabletobeused
andalso meet therequirementsof theExequipment
installation standardBS EN 60079-14:1997.
SAFETY WARNING: Iftheloudspeakers are usedathigh
ambienttemperatures,i.e.over+40ºC, thenthecable entry
temperature mayexceed +70ºCand thereforesuitable heat
resistingcableglandsmustbeused, with aratedservice
temperature of at least 95ºC.
IfahighIP(IngressProtection)ratingisrequiredthena
suitable sealingwasher must befitted under the cablegland.
Whenonly one cable entry isusedtheotherone mustbe
closedwith anEx‘e’ blankingplug,which mustbesuitably
approvedfor the installation requirements.
14) CableConnections
The cableconnectionsaremade into an EExeIIapproved
twelveway terminal block (six wayonlowimpedanceunits)
whichislocatedintheIncreasedSafety Areaterminal
chamber (see figure 3).See section9ofthismanualfor
accessto theterminal chamber. When wiringintoIncreased
Safety Areaterminalenclosures,youare onlypermitted to
connect onewireintoeach way on theterminal block.
Thereforeinorderthat loudspeakerscan beconnected in a
parallelline, theterminal block is fittedwith approved
connectingcombs so thateachelectrical connection hastwo
terminalsin parallel. TerminalNo’s. 1 and 12(1 and 6 on low
impedance units) must not be used onany units. Cables with a
cross-sectional areaof upto4mm² canbeconnected tothe
terminalblock. Cablesthat haveasmall cross-sectionalarea
shouldbefittedwith crimp ferules.
The lowimpedance loudspeakers are fittedwith twopairsof
terminals2-3and 4-5.
The 100VLine loudspeakersarefittedwithfive pairsof
terminals.Terminals 10-11whicharethecommonand one of
the other four pairs ofterminals 8-9, 6-7, 4-5or2-3 shouldbe
selecteddepending onwhat output levelis required (seethe
followingtable).
BExL25E(25W)BExL15E(15W)
Terminals 100VLine100VLine
10-11to8-925W15W
10-11to6-712.5W7.5W
10-11to4-56W3W
10-11to2-32W1W
15) EndofLineDC Monitoring
OnBExL25EandBExL15Eloudspeakers,dclinemonitoring
canbe used if required.Both the 100V Line units and the Low
Impedance units haveablocking capacitorfitted.Itshould be
noted that eachloudspeakerhas a1M ohmbleedresistor
connected acrosstheblockingcapacitorandthisshouldbe
takenintoaccount whenselecting the valueof the end ofline
monitoringresistance.
The endofline monitoringresistorcanbe connectedtothe
end ofline unit. Notethe monitoringresistorMUSTbe
connected totheterminals in theflameproof enclosure,it
MUSTNOTbe connected to the terminals in theIncreased
Safetyterminationenclosure (seesection 8of this manual
foraccessto theflameproofenclosure). Figures4and5
show theterminalsinthe flameproofenclosures forthe 100V
Lineandlowimpedanceunitsrespectively. Onthe low
impedanceunits caremustbetakenwiththepolarity of the
monitoringvoltage.
CableEntries

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DocumentNo. IS2424-PIssueB17-04-02 Sheet4of4
On100Vlineunitstheendofline resistorusedmusthavea
minimumresistancevalueof 4k7ohms andaminimum
wattageof 2.5 watts. The terminalnumbers,acrosswhichthe
resistorshouldbefitted, will dependon theoutputlevel
selectedandare given inthefollowingtable:-
Terminals BExL25E(25W)BExL15E (15W)
A-B25W15W
A-C12.5W7.5W
A-D6W3W
A-E2W1W
A
B
C
D
E
Onlowimpedance units the end of lineresistorusedmust
haveaminimum resistancevalue of2k ohmsandaminimum
wattageof 0.5watts oraminimumresistancevalueof500
ohms andaminimumwattageof2watts. Onthelow
impedanceunits caremustbetakenwiththe polarity of the
monitoringvoltage.Ifan end oflineresistorisfitted to aunit
the links ontheprintedcircuitboards of all loudspeakersin the
line must be cut for thedc blocking capacitorsto bein circuit in
order to dcmonitor theline(seefigure5).
Figure5
Figure4
BExL25E andBExL15E 100VLineLoudspeakers
FlameproofEnclosure
BExL25EandBExL15E8 ohm and 16 ohmLoudspeakers
FlameproofEnclosure
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