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EuropeanSafetySystemsLtd. Impress House, MansellRoad, Acton, London W37QHsales@e2s.com Tel: +44 (0)20 8743 8880
www.e2s.com Fax: +44 (0)20 8740 4200
DocumentNo. IS5001 Issue E27-11-09 Sheet 2of6
3) Theequipmentisonlycertifiedforuseinambient
temperaturesintherange -40oCto+60oCand
shouldnot be usedoutsidethisrange.
4) Thecertificatenumberhasan ‘X’suffix,which
indicatesthatthecertificatecontainsoneofmore
specialconditionsforsafeuse.Thoseinstallingor
inspectingtheequipmentshouldrefertothissection
ofthecertificate.
5) Theequipmenthasnotbeenassessedasasafety-
related device(asreferred tobyDirective94/9/EC
AnnexII, clause1.5).
6) Installationofthisequipment shall be carried out by
suitably-trained personnelinaccordancewiththe
applicablecodeofpractice.
7) Repairofthisequipment shall onlybe carried out by
themanufacturerorinaccordancewiththe
applicablecodeofpractice.
8) Thecertificationofthisequipment reliesonthe
followingmaterialsused initsconstruction:
Enclosure: ABSPlastic
Iftheequipment islikelytocomeintocontact with
aggressivesubstances, thenit istheresponsibilityof
theusertotakesuitableprecautionsthat prevent it
frombeingadverselyaffected, thusensuringthat the
type ofprotectionisnot compromised.
“Aggressivesubstances”-e.g. acidicliquidsor
gasesthat mayattackmetals, orsolventsthat may
affect polymericmaterials.
“Suitableprecautions”-e.g. regularchecksaspart
ofroutineinspectionsorestablishingfromthe
material’sdatasheet that itisresistant tospecific
chemicals.
SPECIALCONDITIONSFORSAFEUSE (asstatedinthe
ECTypeExamination CertificateSIRA 05ATEX2084X)
ConditionsforIS-mAl Sounder
Theequipmenthasaningress protectionratingofIP65.
However,if ithasbeensupplied withoutcableentrydevices,
thentheusershall ensurethat thedevicesthatarefitted will
provide an ingressprotectionthatisappropriatetothe
environmentinwhichitisinstalled i.e.IP20orbetter.If only
oneof thetwocableentriesareused,thentheunused entry
'knockout'shall beleftintactorfittedwithablankingdevice
thatensuresingressprotectionappropriatetothe
environment inwhichit isinstalled i.e. IP20orbetter.
Thetotalcapacitanceconnectedtoterminals+wrt -(i.e. the
capacitanceofthecableplusanyothercapacitance)shall
not exceed83nF.
Theenclosureisnon-conductingand maygeneratean
ignition-capablelevelofelectrosaticchargesundercertain
extremeconditions.The usershouldensurethatthe
equipmentisnotinstalled inalocationwhereitmaybe
subjectedtoexternalconditionsthatmightcauseabuild-up
ofelectrostaticchargesonnon-conductingsurfaces,
additionally,cleaningofthe equipmentshouldbedoneonly
withadampcloth.
Theequipmentshall onlybe supplied viaTerminals+w.r.t.
Terminals-fromabarrierhavingamaximumopencircuit
voltage Uothatis< 28Vandamaximumshortcircuitcurrent
Iothatis< 93mA,whereIoisresistivelylimited.Thebarrier
shall be ATEXcertified byanotified body.
4.2Zones, Gas GroupsandTemperatureClassification
TheIS-mA1minialarmsounderhasbeencertifiedExiaIIC
T4.Whenconnectedtoan approvedsystemitmaybe
installed in:
Zone0 explosivegasairmixture
continuouslypresent.
Zone1 explosivegasairmixturelikelytooccurin
normaloperation.
Zone2 explosivegasairmixturenotlikelytooccur,
andifit does, it willonlyexist forashort time.
Beusedwithgasesingroups:
GroupA propane
GroupB ethylene
GroupC hydrogen
Having atemperatureclassification of:
T1 450ºC
T2 300ºC
T3 200ºC
T4 135ºC
4.3Terminals+and -
Powerissuppliedtothesounderviathe+and–terminals
whichhavethefollowinginput safetyparameters:
Ui = 28V
Ii = 93mA
Pi = 660mW
Ci=0 Li=0
TheIS-mA1soundermaybe poweredfroman ATEX certified
Zenerbarrierorgalvanicisolatorwhichhaveoutput
parametersequaltoorlessthan 28V,93mAand660mW,
whereIoisresistivelylimited.Thecableparametersstated
ontheselectedZenerbarrierorgalvanicisolatorcertificate
must beobserved.
Uptothree IS-mA1sounderscan beconnectedinparallel
andpoweredfromacommonbarrierorisolator.Connecting
twosoundersinparallelwill reducetheoutputfromeachby
about3dB.Three soundersshouldonlybe poweredfroma
commonsupplywhenthemaximumsupplyvoltage is
available.
4.4TerminalsS2and S3
WhenterminalsS2orS3areconnectedto0V(- terminal)the
sounderoutputtonechangestothesecondorthirdstage
alarmrespectively.Theinputsafetyparametersforthese
terminalsare:
Ui = 28V
Ii = 0mA
Becausethepermitted inputcurrentiszero,theseterminals
mayonlybe connected toadiodereturnbarrier,an
intrinsicallysaferelayoragalvanicisolator,all of whichmust
havebeencertifiedbyan ECNotifiedBody. Onlydiode return
barrierswithavoltage drop oflessthan 0.9Vmaybe used.
Alternatively,theseterminalsmaybe connecteddirectlytoa
mechanicallyactivated switchwithinthehazardousarea.
