HK Instruments CDT-MOD-2000 Series User manual

INSTALLATION

INSTRUCTIONS

CARBON DIOXIDE TRANSMITTERS

CDT-MOD-2000 Series

• READ THESE INSTRUCTIONS CAREFULLY BEFORE

ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS

DEVICE.

• Failuretoobservesafetyinformaonandcomplywith

instruconscanresultinPERSONALINJURY,DEATHAND/OR

PROPERTY DAMAGE.

• Toavoidelectricalshockordamagetoequipment,disconnect

powerbeforeinstallingorservicinganduseonlywiringwith

insulaonratedforfulldeviceoperangvoltage.

• Toavoidpotenalreand/orexplosiondonotuseinpotenally

ammableorexplosiveatmospheres.

• Retaintheseinstruconsforfuturereference.

• Thisproduct,wheninstalled,willbepartofanengineered

systemwhosespecicaonsandperformancecharacteriscs

arenotdesignedorcontrolledbyHKInstruments.Review

applicaonsandnaonalandlocalcodestoassurethatthe

installaonwillbefunconalandsafe.Useonlyexperiencedand

knowledgeabletechnicianstoinstallthisdevice.

ThankyouforchoosinganHKInstrumentsCDT-MOD-2000series

carbondioxidetransmier.TheCDT-MOD-2000seriesisintended

for use in commercial environments in HVAC/R applicaons. The

CDT-MOD-2000seriesmeasurescarbondioxide(CO2),ulizingthe

industry standard NDIR measurement principle, and temperature

(T).Oponalrelavehumidity(rH)measurementisalsoavailablein

thesamedevice.TheCDT-MOD-2000seriesdevicesareavailable

withlargetouchscreendisplaymakingtheconguraonofthede-

vicequickandeasy.ConguraonisalsopossibleviaModbusnet-

work.

TheCDT-MOD-2000seriestransmierscalibratethemselvesauto-

macallyusingABCTMlogic.TheABCTMlogicrequiresthatthespace

inwhichthetransmierisusedneedstotobeunoccupiedforfour

hours per day so that the indoor CO2 concentraon drops to the

outside level.CDT-MOD-2000-DC isa dualchannel modelwith a

measuringchannelandareferencechannelthatmakesaconnuous

comparisonandthenecessaryadjustmentaccordingly.CDT-MOD-

2000-DC isalsosuitableforbuildings that areconnuouslyoccu-

pied.

•humidityinvariousindustrialapplicaons

•temperaturesinHVAC/Renvironment

•CDT-MOD-2000-DCseriesdevicescanalsobeusedinapplicaons

wherethereisaconstantsourceofcarbondioxidepresent(for

examplehospitalsandgreenhouses)

SPECIFICATIONS

Performance

Measurement ranges:

CO2:400–2000ppm

Temperature:0...50°C

Relavehumidity:0–100%

Accuracy:

CO2:±40ppm+2%ofreading,DCmodel:75ppmor10%

ofreading(whicheverisgreater)

Temperature:<0.5ºC

Relavehumidity:±2...3%at0...50°Cand10–90%rH

Totalerrorbandincludesaccuracy,hysteresisand

temperatureeectover5...50°Cand10–90%rH.

Technical Specicaons

Media compability:

Dryairornon-aggressivegases

Measuring units:

ppm,°Cand%rH

Measuring element:

CO2:Non-dispersiveinfrared(NDIR)

Temperature: Pt1000(modelswithoutrH-measurement)

 Integrated(modelswithrH-measurement)

Relavehumidity:Thermosetpolymercapacivesensing

element

Calibraon:

Automacself-calibraonABCLogicTMorconnuous

comparison(DC)

Environment:

Operangtemperature:0...50°C

Storagetemperature:-20...70°C

Humidity:0to95%rH,noncondensing

Physical

Dimensions:

Case:99x90x32mm

Weight:

150g

Mounng:

3screwholessloed,3.8mm

Materials:

Case: ABS

Protecon standard:

IP20

Display (Oponal)

Touchscreen

Size:77.4x52.4mm

Electrical connecons:

Powersupply:

 5-screwterminalblock

 (24V,GND)

 0.2–1.5mm2(12–24AWG)

Relay out:

 3-screwterminalblock

 (NC,COM,NO)

 0.2–1.5mm2(12–24AWG)

Electrical

Input: 24VACorVDC,±10%

 Currentconsumpon:max90mA(at24V)+

 10mAforeachvoltageoutputor20mAfor

 eachcurrentoutput

Relay out:

 SPDTRelay,250VAC/30VDC/6A

 Adjustableswitchingpointandhysteresis

Oneanalogoutputforselectedmedia:

0/2*–10VDC,LoadRminimum1kΩ

*(2–10VDCdisplaymodelsonly) or

4–20mA,maximumload500Ω

Communicaon

Protocol:MODBUSoverSerialLine

TransmissionMode:RTU

Interface:RS485

Byteformat(11bits)inRTUmode:

 CodingSystem:8-bitbinary

 BitsperByte:

  1startbit

  8databits,leastsignicantbitsent

  rst

  1bitforparity

  1stopbit

Baudrate:selectableinconguraon

Modbusaddress:1−247addressesselectablein

conguraonmenu

Conformance

MeetsrequirementsforCEmarking:

EMCDirecve2014/35/EU

RoHSDirecve2011/65/EU

LVDDirecve2014/35/EU

WEEEDirecve2012/19/EU

INTRODUCTION

APPLICATIONS

WARNING

CDT-MOD-2000seriesdevicesarecommonlyusedtomonitor:

• CO2andhumiditylevelsinoces,publicspaces,meengrooms

andclassrooms

• CO2levelsofreturnairinvenlaonsystems

•incomingairandreturnairhumiditylevelsinvenlaonsystem

COMPANY WITH

MANAGEMENT SYSTEM

CERTIFIED BY DNV GL

= ISO 9001 = ISO 14001 =

RoHS 2

2011/65/EU

SCHEMATICS

DIMENSIONAL DRAWINGS

INSTALLATION

STEP 1: MOUNTING THE DEVICE

1)Mountthedeviceinthedesiredlocaon(seestep1).

2)Routethecablesandconnectthewires(seestep2).

3)Thedeviceisnowreadyforconguraon.

WARNING!Applypoweronlyaerthedeviceisproperlywired.

Figure 1a - Surface mounng

1)Selectamounnglocaononthewallat1.2–1.8m(4–6)above

theoorandatleast50cm(20in)fromtheadjacentwall.Do

notblockdeviceairventsfromanydireconandleaveatleast

20cm(8in)gaptootherdevices.Locatetheunitinanareawith

goodvenlaonandanaveragetemperature,whereitwillbe

responsivetochangestotheroomcondions.TheCDT-MOD

shouldbemountedonaatsurface.

DonotlocatetheCDT-MODwhereitcanbeaectedby:

•Directsunlight

•Drasordeadareasbehinddoors

•Radiantheatfromappliances

•Concealedpipesorchimneys

•Outsidewallsorunheated/uncooledareas

2)Usethedeviceasatemplateandmarkthescrewholes.

3)Mountthewallplatewithscrews.

•Incorrectinstallaonmaycauseashiintemperatureoutput

•Securethelidwithalockingscrew,iftherelayisconnectedtothe

mainspower

Display locking

jumper

Output mode

selecon

jumpers

Contact pins for

relay terminal

Contact pins for

terminal block

Terminal block

Terminal block for relay

99.0

90.0

83.0

49.5

14.0

45.0

18.0

Ø 4.0

32.0

YES NO NO

Figure 1b - Mounng orientaon

CAUTION!

•ForCEcompliance,aproperlygroundedshieldingcableis

required.

•Usecopperwireonly.Insulateorwirenutallunusedleads.

•Supplyaseparatecableforrelayandsignaloutwhenusingline

voltagetopowertherelay.

•Anywiringmaycarrythefulloperanglinevoltagecurrentbased

oneldinstallaon.Thecoverlockingscrewmustbeinstalledif

thelinevoltageissuppliedtotherelay.

•Careshouldbeusedtoavoidelectrostacdischargetothe

device.

•Thisunithasconguraonjumpers.Youmayneedtorecongure

thisdeviceforyourapplicaon.

1)Routethecablesthroughthesquareopeninginthebackplateor

forsurfacewiringselectaknockoutonthetoporboomofthe

wallplate,asshowninFigure2a.

2)ConnectthewiresasshowninFigure2band2c.

STEP 3: CONFIGURATION

WIRING DIAGRAMS CONTINUED

ConguraonoftheCDT-MOD-2000seriesdeviceconsistsof:

1)Conguringthejumpers(seestep4)

2)Conguraonmenuopons.(Displayversionsonly.Seethe

usermanualforfurtherdetails)

Figure 2a - Roung the cables

24 V

GND

Analog

Output 0/2–10 V / 4–20 mA

output

Figure 2b - Wiring diagram: Power input & signal output

Wires can be routed through the square opening in the back plate

Wires can be routed through the top knockouts

Wires can be routed through the boom knockouts

Figure 2d - Wiring diagram: Relay

COM

STEP 2: WIRING DIAGRAMS

NOTE!Whenusinglongconneconwiresitmaybenecessarytouseaseparate

GNDwireforvoltageoutputcurrenttopreventmeasurementdistoron.The

needforanextraGNDwiredependsonthecrossseconandlengthoftheused

conneconwires.Iflongand/orsmallcrossseconwiresareused,supplycur-

rentandwireresistancemaygenerateavoltagedropinthecommonGNDwire

resulnginadistortedoutputmeasurement.

24 V

GND

Analog

Output 0/2...10 V

output

Figure 2c - Wiring diagram: Extra GND wire

STEP 4: Jumper settings

(Grey colour indicates that a jumper is installed)

No jumper

Circuit open

Jumper installed

Circuit closed

Jumper stored

Figure 3 - Jumper installaon

1)Conguraonoftheoutputmodes:

Selecttheoutputmode,current(4–20mA)orvoltage(0–10V),

byinstallingjumpersasshowninFigure4.

Toselect2–10Voutputmodeonadisplayversionofthedevice:

First,select0–10Voutputbyjumper,thenchangethevoltage(V)

outputfrom0–10Vto2–10Vviatheconguraonmenu.Please

seetheusermanualformoredetails.

The seller is obligated to provide a warranty of ve years for the delivered

goods regarding material andmanufacturing. The warranty period isconsid-

eredtostartonthedeliverydateoftheproduct.Ifadefectinrawmaterialsora

produconawisfound,thesellerisobligated,whentheproductissenttothe

sellerwithoutdelayorbeforeexpiraonofthewarranty,toamendthemistake

athis/herdiscreoneitherbyrepairingthedefecveproductorbydelivering

freeofchargetothebuyeranewawlessproductandsendingittothebuyer.

Deliverycostsfortherepairunderwarrantywillbepaidbythebuyerandthe

returncostsbytheseller.Thewarrantydoesnotcomprisedamagescausedby

accident,lightning,oodorothernaturalphenomenon,normalwearandtear,

improperorcareless handling, abnormaluse,overloading,improperstorage,

incorrectcareorreconstrucon,orchangesandinstallaonworknotdoneby

thesellerorhis/herauthorizedrepresentave.Theseleconofmaterialsfor

devicespronetocorrosionisthebuyer’sresponsibility,unlessotherwiseisle-

gallyagreedupon.Shouldthemanufactureralterthestructureofthedevice,

thesellerisnotobligatedtomakecomparablechangestodevicesalreadypur-

chased.Appealingforwarrantyrequiresthatthebuyerhascorrectlyfullled

his/herduesarisenfromthedeliveryandstatedinthecontract.Theseller

willgiveanewwarrantyforgoodsthathavebeenreplacedorrepairedwithin

the warranty, however only to the expiraon of the original product’s war-

rantyme.Thewarrantyincludestherepairofadefecvepartordevice,orif

needed,anewpartordevice,butnotinstallaonorexchangecosts.Underno

circumstanceisthesellerliablefordamagescompensaonforindirectdamage.

4x0001 ParameterforP-controller 16bit 0...3 0=CO2,1=rH,2=TE,3=MAX

4x0002 CO2hIghlimit 16bit 500...2000 500...2000ppm

4x0003 CO2lowlimit 16bit 0...1900 0...1900ppm

4x0004 rHhighlimit 16bit 100...1000 10.0...100.0%

4x0005 rHlowlimit 16bit 0...900 0.0...90.0%

4x0006 TEhighlimit 16bit 50...500 5.0...50.0°C

4x0007 TElowlimit 16bit 0...450 0...45.0°C

4x0008 Parameter for relay 16bit 0...3 0=CO2,1=rH,2=TE,(3=O)

4x0009 CO2relayon 16bit 500...1950 500...1950ppm

4x0010 CO2relayo 16bit 450...1900 450...1900ppm

4x0011 rH relay on 16bit 15...990 1.5...99.0%

4x0012 rHrelayo 16bit 10...985 1.0...98.5%

4x0013 TE relay on 16bit 15...490 1.5...49.0°C

4x0014 TErelayo 16bit 10...485 1.0...48.5°C

Funconcode03-Readinputholdingregister

Funconcode04-Readinputregister

3x0001 ParameterforP-controller 16bit 0...3 0=CO2,1=rH,2=TE,3=MAX

3x0002 CO2reading 16bit 0...2000 0...2000ppm

3x0003 rHreading 16bit 0...1000 0,0...100.0%

3x0004 Temp.reading 16bit 0...500 0.0...50.0°C

3x0005 CO2highlimit 16bit 500...2000 500...2000ppm

3x0006 CO2lowlimit 16bit 0...1900 0...1900ppm

3x0007 rHhighlimit 16bit 100...1000 10.0...100.0%

3x0008 rHlowlimit 16bit 0...900 0.0...90.0%

3x0009 TEhighlimit 16bit 50...500 5.0...50.0°C

3x0010 TElowlimit 16bit 0...450 0...45.0°C

3x0011 Parameter for relay 16bit 0...3 0=CO2,1=rH,2=TE,(3=O)

3x0012 CO2relayon 16bit 500...1950 500...1950ppm

3x0013 CO2relayo 16bit 450...1900 450...1900ppm

3x0 014 rH relay on 16bit 15...990 1.5...99.0%

3x0015 rHrelayo 16bit 10...985 1.0...98,5%

3x0016 TE relay on 16bit 15...490 1.5...49.0°C

3x0017 TErelayo 16bit 10...485 1.0...48.5°C

MODBUS REGISTERS CONTINUED

Funconcode16-Writemulpleregisters

4x0001 ParameterforP-controller 16bit 0...3 0=CO2,1=rH,2=TE,3=MAX

4x0002 CO2hIghlimit 16bit 500...2000 500...2000ppm

4x0003 CO2lowlimit 16bit 0...1900 0...1900ppm

4x0004 rHhighlimit 16bit 100...1000 10.0...100.0%

4x0005 rHlowlimit 16bit 0...900 0.0...90.0%

4x0006 TEhighlimit 16bit 50...500 5.0...50.0°C

4x0007 TElowlimit 16bit 0...450 0...45.0°C

4x0008 Parameter for relay 16bit 0...3 0=CO2,1=rH,2=TE,(3=O)

4x0009 CO2relayon 16bit 500...1950 500...1950ppm

4x0010 CO2relayo 16bit 450...1900 450...1900ppm

4x0011 rH relay on 16bit 15...990 1.5...99.0%

4x0012 rHrelayo 16bit 10...985 1.0...98.5%

4x0013 TE relay on 16bit 15...490 1.5...49.0°C

4x0014 TErelayo 16bit 10...485 1.0...48.5°C

RECYCLING/DISPOSAL

The parts le over from installaon should be

recycled according to your local instrucons.

Decommissioned devices should be taken to a

recyclingsitethatspecializesinelectronicwaste.

WARRANTY POLICY

1x0001 Relay status Bit0 0...1 0=O-1=On

1x0002 Relaytrend Bit0 0...1 0=Increasing,1=Decreasing

1x0003 Timer status Bit0 0...1 0=O-1=On

Funconcode02-Readinputstatus

Funconcode06-Writesingleregister

4x0001 ParameterforP-controller 16bit 0...3 0=CO2,1=rH,2=TE,3=MAX

4x0002 CO2hIghlimit 16bit 500...2000 500...2000ppm

4x0003 CO2lowlimit 16bit 0...1900 0...1900ppm

4x0004 rHhighlimit 16bit 100...1000 10.0...100.0%

4x0005 rHlowlimit 16bit 0...900 0.0...90.0%

4x0006 TEhighlimit 16bit 50...500 5.0...50.0°C

4x0007 TElowlimit 16bit 0...450 0...45.0°C

4x0008 Parameter for relay 16bit 0...3 0=CO2,1=rH,2=TE,(3=O)

4x0009 CO2relayon 16bit 500...1950 500...1950ppm

4x0010 CO2relayo 16bit 450...1900 450...1900ppm

4x0011 rH relay on 16bit 15...990 1.5...99.0%

4x0012 rHrelayo 16bit 10...985 1.0...98.5%

4x0013 TE relay on 16bit 15...490 1.5...49.0°C

4x0014 TErelayo 16bit 10...485 1.0...48.5°C

STEP 5: MODBUS REGISTERS

FunconsforModbuscommunicaon:

Funcon Code Descripon

01 Readcoilstatus

02 Readinputstatus

03 Readholdingregisters

04 Readinputregisters

05 Forcesinglecoil

06 Presetsingleregister

07 Readexceponstatus

15 Forcemulplecoils

16 Presetmulpleregisters

17 ReportslaveID

Jumper settings CONTINUED

Funconcode05-Writesinglecoil

0x0001 Relaytrend Bit0 0...1 0=Increasing,1=Decreasing

Jumper installed to the le side pins:

0–10 V output selected

N/A

Analog

0...10 V 4...20 mA

Jumper installed to the right side pins:

4–20 mA output selected

N/A

Analog

0...10 V 4...20 mA

Figure 4

2)Lockingthedisplay:

Installthejumpertolockthedisplaytopreventaccesstothe

conguraonmenuaerinstallaoniscompleted(seethe

schemacsforthelocaonofthepins).

HK Instruments CDT-MOD-2000 Series User manual

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