Honeywell XNX - Cautions; Notes

XNX Universal Transmitter
Introduction
7
• Theoptions“Modbusinterface”and“FoundationFieldbusinterface”are
notsubjectofthisEC-typeexaminationcertificate.
• Long-termexposure(>20minutes)toconcentrationsexceedingthe
fullscalerangeoftheH2Ssensortype2cancauseittolosesensitivity.
Themeasuredvaluemaydecreaseeventhoughhighlevelsoftoxic
gasarestillpresent.Ifsuchconditionscanoccur,setthecontrolunit
tolatchatoverrange.Instandaloneoperation,setalarmstolatching.
Whenresettingtheoverrangeoralarm,verifycorrectoperationofthe
transmitter.
Hazardous Location Installation Requirements
(UL/CSA)
• Toreduceriskofignitionofhazardousatmospheres,conduitrunsmust
haveapourglandinstalledwithin18inches(457mm)ofenclosure.
• All¾inchNPTconduit,stoppingplugsandadaptersmustbeinstalled
with5¼threads(minimum)engagedtomaintainExplosionProofrating.
• StoppingPlugssupplied(HoneywellPartNumber1226-0258)are
approvedforuseONLYwiththeXNXUniversalTransmitter.
• ForunitsfittedwiththeOptionalRelayModule:RelayContactRatings
are250VAC5A,24VDC5AResistiveLoadsOnly.
• Terminalblockscrewsshouldbetightenedto4.5lb/in(max).
• ReferenceXNXControlDrawing1226E0402or1226E0454for
additionalinformationregardingISfunction(LocalHARTandEC
Personality).
Hazardous Location Installation Requirements
(ATEX)
• Readandunderstandthismanualpriortoinstallationanduse.
• UseonlycertifiedM25cableglandsforinstallation.
• ShieldedarmoredcableisrequiredforCEcompliance.
• Special Conditions for Safe Use
• ThefollowingappliestotheHARTBarrierintrinsicallysafecircuits:
ForinstallationsinwhichboththeCiandLioftheintrinsically
safeapparatusexceeds1%oftheCoandLoparametersofthe
associatedapparatus(excludingthecable),then50%ofCoand
Loparametersareapplicableandshallnotbeexceeded,i.e.theCi
ofthedeviceplustheCofthecablemustbelessthanorequalto
50%oftheCooftheassociatedapparatus,andtheLiofthedevice
plustheLofthecablemustbelessthanorequalto50%oftheLo
oftheassociatedapparatus.
• ForcircuitsconnectedtotheECbarrierinwhichthecapacitance
andinductanceexceed1%ofthepermittedvalues,thenthe
maximumpermittedcapacitanceislimitedto600nFforgroupIIC
and1uFforgroupIIIC.
• TheconnectiontotheHARTcircuitshallberatedaminimumofIP
6X.
Cautions
Cautions: Identifyhazardousorunsafepracticeswhichcouldresultin
damagetopropertyortotheproduct.
Notes
Notes: Additionalusefulinformation.