
LinorTechnology,Inc.
Informationsubjecttochangewithoutnotice.
www.linortek.com
0419R001V001
PrintedinU.S.A.
POWERCONNECTION
TopowertheNetbellNTGconnectthepowersupplytothe12VDCandGNDpowerterminal,unlessyouareusingPOEthenjust
connecttheethernetcabletothePOEswitch.
Whenconnectingthepowersupply,connectthepositivewireofthe12VDCpowersupplytothe12VDCterminal,nagetivecable
(markedwithawhitestripe)totheGNDterminal.PlugthepowersupplytoasuitableACoutlet.Atthispoint,theGREEN/BOOTLED
lightontheboardshouldcomeonandstartflashing,indicatingthattheNetbellNTGisoperatingandisinthe"BootloadMode".
Afterabout5seconds,theGREENLEDwillgooffandtheREDLEDwillstartblinking,indicatingtheNetbellNTGisoperatingin
"ServerMode"anditisaccessibleonanetworkutilizingTCP/IPprotocols.
ETHERNETCONNECTION
PlugtheInternetcableintotheNETconnector.The"Connection"LEDlightontheboardwillcomeonifa100MHznetworkis
available,otherwiseitwillberemainoffandthe"Activity"LEDshouldstartblinkingindicatingnetworkactivity.
AUDIOOUTPUTCONNECTION
1.ThemostcommonaudioinputforamplifiersareanRCAconnection,makesureyouwiretheWHITEconnectortotheLFTline
outterminalblock(theWHITEwireonourprovidedcable)andtheREDconnectortotheRGTlineoutterminalblock(theRED
wireonourprovidedcable).ThebarecopperwiresarealwayswiredintotheGNDterminalposition.
2.Ifyouramplifierusesa3.5mmstereoaudiojackthetheinputthenusetheprovided3.5mmstereotolineoutcable.The
WHITEwireistobewiredintotheLFTterminalposition,theREDwireistobewiredintotheRGTterminalpositionandthe
barecoppergroundwirecanbewiredintoeitheroftheGNDterminalpositionsontheLINEOUTterminalblock.
3.Ifyouramplifierusesanaudiolineinputthenusethetwoprovided18gauge2plycable.Asthewiresforthe2plycablewillbe
thesamecolorforbothleftandrightsides,wiretheleftsidefirstthenoncecompletedwiretherightsidetoavoidcrossingthe
input/outputs.UsetheblackwiresfortheGNDpositionsandtheredwiresfortheLFTandRGTpositionsforeachrespective
input/output.
RELAYOUTPUTCONNECTION
Therearetworelayoutputsontheboard,theyaredrycontact(48Vmax5A@12VDC,3A@24VDC).Thereare3terminalsforeach
relay,labelledNO,CandNCwhichstandforNormallyOpen,CommonandNormallyClosed.Thephysicalbells/buzzersshould
beconnectedtotheCandNOterminals.
Whenwiringphysicalbellsorbuzzerstotherelayoutput,youneedtoselectasuitablepowersourcethatmeetstherequirementsof
thebellorbuzzer.Wireonesideofthepowersourcetoonesideofthebell.Theotherpowerwireisconnectedtotherelayterminal
C,finalconnecttheothersideofthebellwiretorelayterminalNO.
DIGITALINPUTCONNECTION
Thereare4digitalinputs(548VDC)builtontheboardfortriggeringspecialnotifications/emergencyalerts,asensorsuchas
temperaturesensororapushswitchcanbeconnectedtothedigitalinput.Pleasenote,whenconnecta12VDC48VDCsensortothe
input,anexternalresistor(provideduponrequest,2.2kohm0.5watt)mustbeused.Therearetwomodesofoperationforthedigital
inputs,PULLUPandISOLATED.ThePULLUPmodeconnectsa1Kresistortoaninternalvoltageallowingyoutouseasimpleswitch
(suchasamagneticdoorswitch)accrossterminals1and2.Whentheswitchisactivatedasignalissenttotheinput.Theother
methodallowsyoutodirectlydrivetheNetbellNTG'soptoisolatorwithanexternalvoltagethoughandinternal1Kresistor.This
voltagemaybeintherangeof5VDCto48VDCsupplyingaminumumof2mAoramaximimof30mAtotheoptoisolatordiode.
Thereisnootherinternalconnectiontothisvoltagesoitisanisolatedinput.
Thismodeisselectedbytheswitchontheserver(seetheboardlayoutforreference)markedISOandPUforisolatedorpullup
respectively.OntheNetbellNTGputtheswitchupforpullupanddownforisolated.
TwonotesofCAUTION:1.)Theseunitsaregroundisolated.AlwaysconnectsothatpowerloopisonlyconnectedtotheNetbell
NTGunit.DoNOTuseexternalgroundconnections.DoingsomaydamagetheNetbellNTGorPOEoriginatingdevice.2.)Ifyou
intendtousetheisolatedmode,settheinputswitchbeforeapplyinganexternalvoltagedoingotherwisemaydamagetheNetbell
NTGorPOEoriginatingdevice.
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TheNetbellNTGiscapableofusingitsrelaystoswitchbetweenanexternalstereosourcesuchasaPAsystemoramusicplayer.
Followingthewiringschematicabove,theExternalsourceiswiredintotherelaysusingaNormallyClosedcircuit.Itisthen
connectedtotheaudioLineOutoftheNetbellNTG.
WecanthenprogramtheNetbellNTGtoopentherelays,whichdisconnectstheexternalaudiosource,andplayaprerecordedtone
suchasalunchtimenotificationoradoorchime.Todothiswewillneedtocreateabellscheduleevent,andatasktotriggerthe
playbackoftheaudiofile.
1.Createabellscheduleeventforthedesiredtimes.
a.Relays1and2willhavetoalwaysbetriggeredtodisconnecttheexternalsource.
b.Usingrelaysnumbered38(phantomrelays)onthebellschedulepagewillbeneededtoselecttheaudiofileontheNetbell
NTG.
2.Createatasktoplaythedesiredaudiofile.
a.SelectRELAYforDeviceAandentertherelayintoDataA,orrelaysasan"AND"statementusingDeviceBandDataB.
b.ForDeviceCselectSendUART.ForDataCenterintheUARTcommandfortheaudiofile,forexample
"PFILENAMEOGG".
FormoreinformationofhowtoprogramtheNetbellNTGsoftware,pleaserefertotheNetbellNTGSoftwareSetting
Instructions.
WIRINGABACKGROUNDMUSICCONNECTION