9) PowerSupplySelection
Itisimportantthatasuitablepowersupplyisusedtorun the
beacons.Thepowersupplyselected musthavethe
necessarycapacitytoprovidetheinputcurrenttoall ofthe
beaconsconnected tothesystem.
Thefollowingtableshowsthe inputcurrenttakenbythe
variousbeacons:-
UnitType NominalI/PInput Max.
VoltageCurrentI/P
Volts
BExBG15E 24VDC 860mA 30V
BExBG15E 48VDC 480mA 58V
BExBG15E 230VAC170mA 253V
BExBG15E 115VAC360mA 126V
BExBG10E 12VDC 1.45A 15V
BExBG10E 24VDC 660mA 30V
BExBG10E 48VDC 340mA 58V
BExBG10E 230VAC110mA 253V
BExBG10E 115VAC250mA 126V
Theinputcurrentwill varyaccording tothe voltageinput
level.The currentlevelsshownabovearefornominalinput
voltage.The12V,24Vand48VDC unitshaveaconverter
circuitandthereforetheinputcurrentlevelwilldecrease
slightlyastheinputvoltage inincreased andwill increase
slightlyastheinput voltage isreduced.
Theabovetablealsoshowsthe maximumvoltagesatwhich
thebeaconscan be operated.
10) CableSelection
Whenselectingthecablesizeconsiderationmustbegivento
theinputcurrentthateachunitdraws(see tableabove),the
numberofbeaconsonthelineandthelengthofthecable
runs.Thecablesizeselected musthavethenecessary
capacitytoprovide theinputcurrenttoallofthebeacons
connected totheline.
SAFETYWARNING: IftheBExBG15EandBExBG10E
beaconsareusedathighambienttemperatures,i.e.over
+40ºC,thenthecableentrytemperaturemayexceed +70ºC
andthereforesuitableheatresistingcablesmustbe used,
witharated servicetemperatureofat least 110ºC.
11) Earthing
BothACandDCbeaconunitsmustbeconnectedtoagood
qualityearth.Theunitsareprovided withinternaland
externalearthingterminalswhicharebothlocated onthe
terminalchambersectionoftheunit(see figures2and3).
Whenusingtheinternalearthterminalensurethatthe
stainless steelM4flatwasherisbetweentheincoming earth
wireandtheenclosure.
Whenusingtheexternalearthterminalacablecrimplug
mustbe used.Thecablelugshouldbe locatedbetweenthe
twoM5stainless steelflatwashers.TheM5stainlesssteel
springwashermustbe fixed betweentheouterflatwasher
andtheM5stainless steelnuttoensurethatthecablelugis
secured against looseningandtwisting.
Theinternalearthbondingwireensuresthatagoodquality
earthismaintained betweentheflameproof chambercasting
andtheflameproofcovercasting.
12) CableGlands
TheBExBG15EandBExBG10Ebeaconshavedualcable
glandentrieswhichhavean M20 x1.5entry.Onlycable
glandsapproved forEx‘e’applicationsorbetter(i.e.Ex‘d’
applications,provided theyhaveanIPratingofIP54or
better) can beused.Theymustbesuitableforthe typeof
cabletobeusedandalsomeettherequirementsoftheEx
equipmentinstallationstandards EN60079-14:2008 /
IEC60079-14:2007.
Whenonlyonecableentryisusedtheotheronemustbe
closedwithan Ex‘e’blankingplug,whichmustbe suitably
approvedfortheinstallationrequirements.
Forcombustibledustapplications,thecableentrydeviceand
blankingelementsshall be intype ofexplosionprotection
increasedsafety"e"orflameproofenclosure"d"andshall
haveanIP6XratingaccordingtoEN60529:1992.
SAFETYWARNING: If thebeaconsareusedathighambient
temperatures,i.e.over+40ºC,thenthecableentry
temperaturemayexceed +70ºCandthereforesuitableheat
resistingcableglandsmustbe used,witharated service
temperatureofat least 110ºC.
13) CableConnections
Thecableconnectionsaremadeintoan ExeII approvedsix
wayterminalblockwhichislocatedintheIncreasedSafety
Areaterminalchamber(seefigure3).Seesection8ofthis
manualforaccesstotheterminalchamber. Whenwiringinto
IncreasedSafetyAreaterminalenclosures,youareonly
permittedtoconnectonewireintoeachwayontheterminal
block.Thereforeinorderthatbeaconscan be connectedina
parallelline,theterminalblockisfitted withapproved
connectingcombssothateachelectricalconnectionhastwo
terminalsinparallel.TerminalNo’s. 1and6must not be used
oneitherACorDC units.Cableswithacross-sectionalarea
ofupto4mm²can be connected totheterminalblock. Cables
thathaveasmall cross-sectionalareashouldbe fittedwith
crimpferules.
