Honeywell XNX - 4.3 POD Connections; 4.4 4-20 mA Output, Common Connections and Power

XNX Universal Transmitter
Section 1 - Introduction
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1.2.3 POD
ThePOD(Personality,Options,andDisplay)enclosescircuit
boardsforthepersonalitymodule,optionalinterfaces,and
display�
Thepersonalitymodule,orcircuitboard,determinesthe
transmitterbehaviorbasedonthesensortypeattachedto
thetransmitter(electrochemicalcell,catalyticbeadsensor,or
infrared)andprovidesthenecessaryinterface�Connectiontothe
attachedsensorismadethroughthesensorconnectoraccessed
viaaslotinthePODhousing�
Theoptionalcommunicationboardsvarydependingonthe
optionselectedwhenordered�Onlyoneofthethreeavailable
interfaceoptions(relays,Modbus,orFoundationFieldbus)can
beattachedtotheXNXtransmitter�
Figure 6. POD, exploded View
1.3 Options
1.3.1 Local HART
Availablewithanysensortechnologyorpersonality,anexternal
accesstotheHARTinterfaceintheXNXtransmitterisprovided�
Anintrinsicallysafe(IS)barrierinsidethetransmittergivesthe
userfullcontrolusingahand-heldinterrogatorforprogramming
andconguration�Theexternalinterfaceisinstalledinthelower
leftcable/conduitportofthetransmitterandisintrinsicallysafe�
Formoreinformation,seeAppendixA-HARTProtocol�
Figure 7. XNX Universal Transmitter with HART Interface IS Barrier
1.3.2 Relays
Therelayoption(XNX-Relay)provides3form“C”(SPDT)
normallyopen/normallyclosed(NO/NC)contactsforalarm
andfaultindication�Aremoteresetinputisprovided(TB4)�
MomentarilyclosingthethecircuitbetweenthepinsofTB4
performsthesamefunctionastheResetAlarms&Faults
command�
TheXNXtransmitterhasthreerelays:relay1isforalarmlevel
1,relay2isforalarmlevel2,andrelay3isforfaultsandspecial