Honeywell XNX - 2 �1MountingAndLocationOfSensors����������������������������������28; 2�2 Wiring The Xnx Transmitter; 2�2�1 General Wiring Considerations

XNX Universal Transmitter
Section 2 - Installation and Operation
30
2.2 Wiring the XNX Transmitter
TheXNXtransmitterisavailableinsensortechnologies,or
personalityoptions,whichsupportavarietyofsensorsand
applications�Eachofthepersonalitiesusededicatedinterface
boards�Pluggableterminalblocksareusedforeasyconnection
andservice�Thepersonalityboardsandoptionalcommunication
interfacesareenclosedinplastichousingscomprisingthe
electronicsPOD(Personality,Options,andDisplay)�The
PersonalitycircuitboarddeterminestheXNXbehaviorbasedon
thesensortypeattachedtotheXNXinterface(Figure35)�See
Specicationsfordriftandzerodeviationvalues�
ThistableillustratesthethreeXNXtransmittercongurations
andthesensorseachsupport�
XNX IR Personality XNX EC Personality

SearchlineExcel
SearchpointOptimaPlusLocal/
Remote
XNXECSensor
GenericmASensors XNXECSensorRemoteMountKit
XNX mV Personality
705Local/Remote MPDLocal(catbeadandIR) SensepointLocal/Remote
705HTLocal/Remote MPDRemote SensepointPPMLocal/Remote
SensepointHTRemote
Figure 28. XNX Transmitter personalities
Caution: Beforewiringthetransmitter,confirmthatthecorrect
personalityandcommunicationboardsareinstalled.
2.2.1 General Wiring Considerations
ForproperoperationoftheXNXUniversalTransmitterand
sensortechnologies,considerationofwiring-inducedvoltage
drops,transientelectricalnoise,anddissimilarearthground
potentialsisimperativeinthedesignandinstallationofthe
system�
EMI note for applications using shielded cable: Cable
shieldmustprovide90%coverageofthewiring�Cable
shieldterminationsmustbemadeatthecableglands
withsuitableEMI-typeglands�Avoidterminating
cableshieldsattheearthgroundluginsidetheXNX
enclosure�
Loading
WhenwiringforDCpower,4-20mAsignal,remotewiringto
sensorsmustbesizedsufcientlytoprovideadequatevoltages
forthelinelengthandtheloadsthatwillbeused�
Isolation
Isolatingpowerandsignalcarryingconductorsisrecommended�
Circuit Protection
Supplycircuitsmustprovideovercurrentprotection�Class2
powersuppliesarerequiredfor24voltDCsupply�Consider
inrushcurrentinspecifyinganyDCsupply�Powersupplyrange