Omega LVCN-120, -130, and -140 Series Owner's manual

Type
Owner's manual
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INTRODUCTION/TABLEOFCONTENTS StepOne
The LVCN120/130/140 Series Controllers are generalpurpose level controllers offered in three
configurationsforpumpandvalvecontrol.TheLVCN140Seriesfeaturesasingle10ASPDTrelayoutputand
canacceptonelevelsensorasaninput.TheLVCN130Seriesfeaturesasingle10ASPDTlatching relayoutput
and can accept one or two level sensor(s) as an input.This package is ideal for the automatic filling or
emptying of a tank.The LVCN120 Series features both a single 10A SPDT and a single 10A Latching SPDT
relay.This package allows for a threeinput
system that can perform aautomatic operations (fill or empty)
and an alarm operation (high or low).The LVCN120 series can also be a twoinput controller that can
performdualalarms(2high,2lowor1high,1low).Packageeithercontrollerserieswithlevelswitchsensors
and
fittings.
Features
FailSaferelaycontrolofpumps,valvesoralarmswitha0to60seconddelay
Optionalflashingalarmbringsimmediateattentiontolevelalarmconditions.
PolypropyleneenclosurecanbeDINrailmountedorbackpanelmounted.
EasysetupwithLEDindicatorsforsensor(s),powerandrelaystatus.
InvertswitchchangesrelaystatefromNOtoNCwithoutrewiring.
ACpowered
TableofContents
Specifications:.........................................................................................................................................................4
Dimensions:.............................................................................................................................................................4
SafetyPrecautions:.................................................................................................................................................5
MakeaFailSafeSystem:............................................................................................................................6
Components:...............................................................................................................................................6
GettingStarted:.......................................................................................................................................................7
FeaturesoftheSingleInputHighorLowRelay:.........................................................................................7
FeaturesoftheDualInputAutomaticFill/EmptyRelay:............................................................................7
GuidetoControls:.......................................................................................................................................8
Electrical..................................................................................................................................................................9
ConnectingSwitchestoInputTerminals:...................................................................................................9
VACPowerInputWiring:............................................................................................................................9
RelayInputWiring:...................................................................................................................................10
Changing
from120to240VAC.................................................................................................................10
Installation............................................................................................................................................................11
ApplicationExmaples............................................................................................................................................12
LowLevelAlarm:.......................................................................................................................................12
HighLevelAlarm:......................................................................................................................................12
LEDIndication:..........................................................................................................................................12
AutomaticFill:...........................................................................................................................................13
AutomaticEmpty:.....................................................................................................................................13
Appendix...............................................................................................................................................................14
ControllerLogic.........................................................................................................................................14
RelayLatchingLogicTable(LVCN120&‐130Seriesonly).......................................................................14
Troubleshooting........................................................................................................................................14

4
SPECIFICATIONS/DIMENSIONS StepTwo
Supplyvoltage: 120/240VAC,50‐60Hz.
Consumption: 5Wattsmax.
Sensorinputs: (1)levelswitch
(LVCN130seriesonly) (1or2)levelswitches
(LVCN120seriesonly) (1,2or3)levelswitches
Sensorsupply: 13.5VDC@27mA
LEDindication: Sensor,relay&powerstatus
Contacttype: (1)SPDTRelay
(LVCN130seriesonly) (1)SPDTRelay,Latched
(LVCN120seriesonly) (2)SPDTRelays,only1Latched
Contactrating: 250VAC,10A
Contactoutput: SelectableNOorNC
Contactdelay: 0to60seconds
Contactlatch: SelectOn/Off
(LVCN120&LVCN130seriesonly)
Electronicstemp.: F:‐40°to158°
C:‐40°to70°
Enclosurerating: 35mmDIN(EN50022)
Enclosurematerial: PP(U.L.94VO)
Failsafety: Powerfailsafe
CEcompliance: EN61326EMC
EN610101Safety
LVCN140seriesfaceplate:1sensorinput,1relayoutput.
LVCN130series
faceplate:2sensorinputs,1relayoutput.
Therelayincludedisalatchingrelay.
LVCN120seriesfaceplate:3sensorinput,2relayoutputs.
Onerelayislatchingandtheotherisasingleinputrelay.
TopView‐AllModels
SideView‐AllModels
InternalControllerLogic
5
SAFETYPRECAUTIONS StepThree
AboutThisManual:PLEASEREADTHEENTIREMANUALPRIORTOINST ALLINGORUSINGTHISPRODUCT.
This manual includes information on three different models of Remote Relay Controllers from OMEGA
ENGINEERING:LVCN120,LVCN130andLVCN140series.Manyaspectsofinstallationandusearesimilar
betweenthethreemodels.Wheretheydiffer,themanualwillnoteit.Pleaserefertothepartnumberon
thecontrolleryouhavepurchasedasyouread.
User’s ResponsibilityforSafety:OMEGAENGINEERINGmanufacturesseveral models of controller, with
differentmountingandswitchingconfigurations.Itistheuser’sresponsibilitytoselectacontrollermodel
that is appropriate for the application, install it properly, perform tests of the installed system, and
maintainallcomponents.
Electrical Shock Hazard:It is possible to contact components on the controller that carry high voltage,
causing serious injury or death.Allpower to the controller and the relay circuit(s) it controls should be
turned OFF prior to working on the controller.If it is necessary to make adjustments during powered
operation,useextremecautionanduseonlyinsulatedtools.Makingadjustmentstopoweredcontrollers
isnotrecommended.Wiringshouldbeperformedbyqualifiedpersonnelinaccordancewithallapplicable
national,stateandlocalelectricalcodes.
FlammableorExplosiveApplications:TheentireLVCN120/130/140seriesremotemountcontrollers
shouldnotbeusedwithexplosiveorflammableliquids,whichrequireanintrinsicallysafeorexplosion
proofrating.Ifyouareunsureofthesuitabilityofacontrollerforyourinstallation,consultyourOmega
Engineeringrepresentativeforfurtherinformation.
InstallInaDryLocation:Thecontrollerhousingisnotdesignedtobeimmersed.Wheninstalledproperly,
the controller is not designed to be immersed.It should be mounted in such a way that it does not
normallycomeintocontactwithliquid.Refertoanindustryreferencetoensurethatcompoundsthatmay
splashontothecontrollerhousingwillnotdamageit.Suchdamageisnotcoveredbythewarranty.
RelayContactRating:Therelayisratedfora10ampresistiveload.Manyloads(suchasamotorduring
startuporincandescentlights)arereactiveandmayhaveaninrushcurrentcharacteristicthatmaybe10
to 20 times their steadystate load rating.The use of a
contact protection circuit may be necessary for
yourinstallationifthe10ampratingdoesnotprovideanamplemarginforsuchinrushcurrents.

6
SAFETYPRECAUTIONS(cont.) StepThree
Make a FailSafe System: Design a failsafe system that accommodates the possibility of relay or power
failure.If power is cut off to the controller, it will deenergize the relay.Make sure that the deenergized
stateoftherelayisthesafestateinyourprocess.Forexample,ifcontrollerpowerislost,apumpfillingatank
willturnoffifitisconnectedtotheNormallyOpensideoftherelay.
While the internal relay is reliable, over the course of time relay failure is possible in two modes: under a
heavyloadthecontactsmaybe“welded”orstuckintotheenergizedposition,orcorrosionmaybuildupona
contact so that it will not complete the circuit when it should.In critical applications, redundant backup
systems and alarms must be used in addition to the primary system.Such backup systems should use
differentsensortechnologieswherepossible.
While this manual offers some examples and suggestions to help explain the operation of OMEGA
ENGINEERINGproducts,suchexamplesareforinformationonlyandarenotintendedasacompleteguideto
installinganyspecificsystem.
Components:
LVCN140 ‐SingleInputHighorLowRelayController
LVCN140CE ‐SingleInputHighorLowRelayControllerw/CE
LVCN130 ‐DualInputAutomaticFill/EmptyRelayController
LVCN130CE ‐DualInputAutomaticFill/EmptyRelayControllerw/CE
LVCN120‐ThreeInputAutoFill/EmptyRelayControllerwithSingleInputHighorLowRelay
LVCN120CE‐ThreeInputAutoFill/EmptyRelayControllerwithSingleInputHighorLowRelayw/CE
Owner’sManual

7
GETTINGSTARTED StepFour
FeaturesofaSingleInputHighorLowRelay:SingleInputRelays(LVCN140series,LVCN130serieswithlatch
turned OFF and LVCN120 series) are designed to receive a signal from a single liquid sensor.It turns its
internalrelay ONorOFF(asset by the invert switch) in response tothepresence ofliquid,andchangesthe
relaystatusbackagainwhenthesensorisdry.
HighAlarm:
Invert is OFF.Relay will
energize when the switch
becomes Wet and will de
energize when the switch
becomesDry(outofliquid).
LowAlarm:
InvertisON.Relay
willenergize
when the switch becomes Dry
(out of liquid) and will de
energize when the switch
becomesWet.
SingleInputRelaysmaybeusedwithalmostanykindofsensorsignal:currentsensingorcontactclosure.The
relayisasinglepole,doublethrowtype;thecontrolleddevicecanbe
connectedtoeitherthenormallyopen
ornormallyclosedsideoftherelay.Atimedelayfrom0to60secondscanbesetbeforetherelayrespondsto
the sensor input.Typical applications for Single Input Relays are high level or low level switch/alarm
operations(openingadrainvalvewheneverliquidlevelrisestoasensorpoint)andleakdetection(sounding
analarmwhenaleakisdetected,etc.).
FeaturesofaDualInputAutomatic Fill/EmptyRelay:TheDualInputAutomaticFill/EmptyRelay(LVCN120
andLVCN130seriesonly)isdesignedtoreceivesignalsfromtwoliquidsensors.ItturnsitsinternalrelayON
or OFF (as set by the invert switch) in response to the presence of liquid on bothsensors, and changes the
relaystatusbackagainwhenbothsensorsaredry.
AutomaticEmpty:
Latch is ON & Invert is OFF.Relay
will energize when level reaches
high switch (both switches are
wet).Relay will deenergize when
level is below the bottom switch
(bothswitchesaredry).
AutomaticEmpty:
Latch is ON & Invert is ON.Relay
will energize when level is below
the bottom switch (both switches
are dry).Relay will deenergize
when level reaches
high switch
(bothswitchesarewet).
8
GETTINGSTARTED(continued) StepFour
TheDualInputAutomaticFill/EmptyRelaymaybeusedwithalmostanykindofsensorsignal:currentsensing
orcontactclosure.Therelayis a single pole, double throwtype;thecontrolled device can be connectedto
eitherthenormallyopen ornormallyclosed sideoftherelay.Atimedelayfrom0to60secondscanbeset
beforetherelayrespondstothesensorinput.TypicalapplicationsforDualInputRelaysareautomaticfilling
(starting fill pump at a low level and stopping pump at a high level) or automatic emptying operations
(openingadrainvalveatahigh
levelandclosingvalveatlowlevel).
GuidetoControls:Belowisalistingandthelocationofthedifferentcomponentsforthecontroller:
1. Powerindicator:ThisgreenLEDlightswhenACpowerisON.
2. Relay indicator: This red LED will light whenever the controller energizes the relay,
in response to the
properconditionatthesensorinput(s)andafterthetimedelay.
3. ACPowerterminals:Connectionof120VACpowertothecontroller.Thesettingmaybechangedto240
VAC if desired.Thisrequires changing internal jumpers; this is covered inthe Installation section of the
manual.Polarity(neutralandhot)doesnotmatter.
4. Relayterminals(NC,C, NO):Conne ctthedeviceyouwishtocontrol(pump,alarmetc.)totheseterminals:
supply to the COM terminal, and the device to the NO or NC terminal asrequired.The switched device
shouldbeanoninductiveloadofnotmorethan10amps;forreactiveloadsthecurrentmustbederated
orprotectioncircuitsused.WhentheredLEDisONandtherelayisintheenergizedstate,theNOterminal
willbeclosedandtheNCterminalwillbeopen.
5. Time delay: Use
potentiometer to set delay from 0.15 to 60 seconds.Delay occurs during switch make
andswitchbreak.
6. Inputindicators:UsetheseLEDsforindicatingWETorDRYstatusofswitch.WhenswitchisWET,LEDwill
beAmber.WhenswitchisDRY,LEDwilleitherbeGreenforpoweredswitchesorOFFforreedswitches.
Note:PoweredswitchesmaybereversedforWET/OFF,DRY/Amberindication.
7. Invertswitch:Thisswitchreversesthelogicoftherelaycontrolinresponsetotheswitch(es):conditions
thatusedtoenergizetherelaywillnowdeenergizetherelayandviceversa.
8. Latch
switch (LVCN120 and LVCN130 series only):This switch determines how the relay will be
energizedinresponsetothetwosensorinputs.WhenLATCHisOFF,therelayrespondstosensorInputA
only;whenLATCH is ON, the relay will energizeordeenergizeonly when both switches(AandB)arein
the same condition (both wet or both dry).The relay will remain latched until both switches change
conditions.
9. Inputterminals:Connecttheswitchwirestotheseterminals:Notethepolarity:(+)isa13.5VDC,27mA
powersupply(connected totheredwire
ofaOMEGAENGINEERINGlevelswitch),and()isthereturnpath
from the sensor (connected to the black wire of a OMEGA ENGINEERING level switch).If polarity is
reversed,thesensorswillnotwork.

9
ELECTRICAL StepFive
Connecting switches to input terminals:Please note a
difference between OMEGA ENGINEERING powered level
switchesandreed switches.All poweredlevelswitches (series
LTU100, LVU150, LVP51, LVC152 & LVF210 series) will be
wired with the Red wire to the (+)terminal and the Blackwire
to
the()terminal.OMEGAENGINEERINGreedswitches(series
LVV110 & LVH200 series) will have a particular wiring based
uponpartnumber.Seetheillustrationbelowtoindicatewiring
foryourswitch.Note:theShieldwirewillbeusedonlyforlong
cablerunsorwhereexcessiveelectricalnoiseispresent.
* LVV110 series can be wired using the
White andBlack wires for NO operations
or the Red and Black wires for NC
operations.
LED Indication:Use LED's located above the input
terminalstoindicatewhethertheswitchisinawetor
dry state.
With powered switches, Green indicates
dry and Amber indicates wet.With reed switches,
AmberindicateswetandnoLEDindicatesdry.Note:
reed switches may be wired in reverse so that wet
indicatesdryandAmberindicatesdry.
PoweredSwitches ReedSwitches
VAC Power Input Wiring:Observe the POWER SUPPLY label on the LVCN120/130/140 series.The label
identifies the power requirement(120or240 VAC) and the terminal wiring.Note: Polaritydoes not matter
withtheACinputterminal.
10
ELECTRICAL(continued) StepFive
RelayInputWiring:Therelayisasinglepole,double
throw type rated at 250 Volts AC, 10 Amps, 1/4 Hp.
The two terminal NO and NC (normally open and
normallyclosed)willbeusedindifferentapplications.
Remember that the "normal" state is whenthe relay
coilisdeenergizedandtheRedrelayLEDisOff/de
energized.
Changingfrom120to240VAC:
1. Remove the back panel of the controller and
gently slide the printed circuit board from the
housing.UsecautionwhenremovingthePCB.
2. LocatedjumpersJW1,JW2andJW3onthePCB.
3. Tochangeto240VAC,removejumpersfromJW1
andJW2andplaceasinglejumperacrossJW3.To
changeto120VAC,removejumperJW3andplace
jumpersacrossJW1andJW2.
4. Gently return PCB into housing and replace back
panel.
120VAC 240VAC
Configuration Configuration

11
INSTALLATION StepSix
PanelDINRailMounting:The controller may be mountedbyeitherabackpanelusing two screwsthrough
mountingholeslocatedatthecornersofthecontrollerorbysnappingthecontrolleron35mmDINRail.

Note:Alwaysinstallthecontrollerinalocationwhereitdoesnotcomeintocontactwithliquid.


12
APPLICATIONEXAMPLES StepSeven
LowLevelAlarm:Thegoalistomakesurethattheliquidleveldoesnotfallbelowacertainpoint.Ifitdoes,
analarmissupposedtosound,alertingtheoperatorofalowlevelcondition.
Ifpowerisaccidentallycuttothecontroller,thesensor'sabilitytonotifytheoperatorofalowlevelcondition
couldbelost.Thesystemmustalerttheoperatornotonlytolowliquidlevel,buttocontrollerpowerloss.
To do this, connect the hot lead of the alarm to the NC side of the relay
terminalofthecontroller.Ifpowerislost,therelaywillbedeenergized,and
the alarm will sound (if there is still power to the alarm circuit itself).The
alarm circuit should have a noninterruptible power supply or some other
indicatororbackupalarmtowarnofapowerfailureinthealarmcircuit.
In this application, the normal status if the sensor at the bottom if the tank
will be wet, and the relay will be energized holding the alarm circuit open.
Both the relay LED and the Input LED will be on simultaneously, so for this
application,InvertshouldbesettotheOFFposition.
HighLevelAlarm:Inthesamemanor,thissystemcanbeusedtosoundanalarmwhenfluidreachesahigh
level, with just a change in the location of the sensor and the setting of the
Invertswitch.
The alarm isstill connected to the NC side of the relay toallow for a power
failurealarm.
The sensor is normally dry.In this condition, we want the relay to be
energized so the alarmdoes not sound: i.e., the Red relay LEDshould be on
whenevertheInputLEDisAmber.SoweturnInvertOn.Ifthefluidlevelrises
tothehigh sensor point,thesensorgoes on,therelaydeenergizes,and the
alarmsounds.
LEDIndication:Todeterminewhethertheswitchisinawetordrystate,observetheLED'sloc a tedabovethe
inputterminals.Withpoweredswitches,GreenindicatesdryandAmber
indicateswet.Withreedswitches,
Amber indicates wet and no LED indicates dry.Note: reed switches maybe wired in reverse so that wet
indicatesdryandAmberindicatesdry.

13
APPLICATIONEXAMPLES(cont.) StepSeven
AutomaticFill:This systemconsistsofatank withahighlevelsensor,alow
levelsensor,andapumpthatiscontrolledbythecontroller.Partofaproper
failsafe design for this particular system is that if power is lost to the
controller for any reason, the pump filling the tank must be turned off.
Therefore,weconnectthepumptotheNOsideoftherelay.Whentherelay
isenergized,thepumpwillturnonand fill the tank.The relay indicatorwill
corresponddirectlytotheON/OFFstatusofthepump.
NOTE:Ifthepump motorloadexceedsthe ratingof thecontroller’srelay,a
stepperrelayofhighercapacitymustbeusedaspartofthesystemdesign.
DeterminingthesettingsofLATCHandINVERT:Thisisthewaythesystemmustoperate:
Whenboththehighandlowsensorsaredry,thepumpshouldturnon,startingtofillthetank.
Whenthelowsensorgetswet,thepumpshouldstayon.
Whenthehighsensorgetswet,thepumpshouldturnoff.
Latch:Inanytwosensorcontrolsystem,LATCHmustbeON.
Invert:ReferringtothelogicchartinStepNine,welookforthesettingthatwilldeenergizetherelay(start
thepump)whenbothinputsarewet(AmberLEDs).Inthissystem,InvertshouldbeON.
DeterminingAorBinputconnections:WhenLATCHisON,thereisnoeffectivedifferencebetweenInputA
andB,sincebothsensorsmusthavethesamesignalinorderforstatustochange.Whenwiringanytwoinput
relaysection,theonlyconsiderationforhookingaparticularsensortoAorBisifLATCHwillbeOFF.
Automatic Empty:Note that similar system logic can be used for an
automaticemptyoperationsimplybycontrollinga pumpthatpumpsfluidout
of the tank instead of into it.However, note the importance of failsafe
design.If the tank is being passively filled, and a pump must be used to
activelyemptyit,apowerfailuretoeitherthecontrollerorthepumpcircuits
willcauseoverflow.
Alternatively,anelectricallycontrolleddrainvalvecouldbeused.Inthiscase,
the valve should be a type that will automatically open if power is lost; in
other words, power must be used to hold it closed.The valve would be
connectedto
theNOsideofthe relay—ifpowerislosttothecontroller,therelaydeenergizes,thevalveloses
thepowerthatwasholdingitshut,andfluidwilldrainfromthetankintosomeothersafecontainmentuntil
power is restored. In this system, whenever the red relay LED of the controller is ON, the drain is closed,
allowingfluidtorise.
Inthiscase,InvertshouldbeON:whenbothsensorsarewet,therelaydeenergizes,theswitchtothevalve
opens,andthetankwilldrain.
14
APPENDIX StepEight
ControllerLogic:Pleaseusethefollowingguidetounderstandtheoperationofthecontrollers.
1. PowerLED:MakesuretheGreenpowerLEDisONwhenpowerissuppliedtothecontroller.
2. InputLED(s):TheinputLED(s)onthecontrollerwillbeAmberwhentheswitch(es)is/arewetandGreen
orOFFwhentheswitch(es)is/aredry.IftheLED'sarenotswitchingtheinputLED,testthelevelswitch.
3. SingleInputRelays:WhentheinputLEDturnOFFandON,therelayLEDwillalsoswitch.WithinvertOFF,
therelayLEDwillbeONwhentheinputLEDisONandOFFwhentheinputLEDisOFF.WithinvertON,the
relayLEDwillbeOFFwhentheinputLEDisONandONwhentheinputLEDisOFF.
4. DualInput (latching) Relays:When both inputs are wet (Amber LED's ON), the relay will be energized
(Red LED ON).After that, if one switch becomes dry, the relay will remain energized.Only when both
switches are dry (both amber LED's OFF) will the controller deenergize the relay.The relay will not
energizeagainuntilbothswitchesarewet.SeetheRelayLatchLogicChartbelowforfurtherexplanation.
RelayLatchLogicTable(latchingrelaysonly):Therelaycaneitherbeanindependentrelay(highorlowlevel
alarm)or can be a latching relay (automatic fill or empty) with latch ON.With Latch OFF,therelaywillonly
respondtotheINPUTAsetting.INPUTBwillbeignored.
With Latch ON, the relay will
actuate when INPUT A and INPUT
B are in the same condition.The
relay will not change its condition
until both inputs reverse their
state.
Caution:Some sensors
(particularly buoyancy sensors)
may have their own inverting
capability (wired NO or NC).This
will change the logic of the invert
switch.Checkyoursystemdesign.
Troubleshooting
PROBLEM SOLUTION
Relayswitchesonlyfrom
inputA(ignoresinputB)
LatchisturnedOFF.FlipthelatchswitchtoturnON.
LevelreachesalarmON,
butrelayisOFF.
First, check to make sure the input LED is ON.If not,
checkwiringtosensor.
Second, check status ofRelay LED.If incorrect, flip the
Invertswitchtochangetherelaystate.
PumporValveissupposed
tostop,butitdoesnot.
First,checktomakesuretheinputLEDsarebothinthe
satestate(bothONorbothOFF).Ifnot,checkwiringto
sensoreachsensor.
Second, check status ofRelay LED.If incorrect, flip the
Invertswitchto
changetherelaystate.
Controllerispowered,but
nothinghappens.
First check the Power LED to make sure it is Green.If
not,checkthewiring,powerandmakesuretheterminal
isseatedcorrectlyoverthe6pins.
15

16
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Omega LVCN-120, -130, and -140 Series Owner's manual

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Owner's manual

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