Air Quality Node

Descriptions

Highlights:• TheRS485arehardenedupforovervoltageandpowersupplycrossedover.• DisplayindegreesFahrenheitorCelsius(connectiontoBacnet).• TheLCDisabitmapsowecanshownetworkconnectivity.• Theusercanconfigurewhattheywanttoshowonthedis-play:networkactiviy,baudrate,protocol,etc.• Youcanshowausersetpointsoyoucanuseitasaroom/setpointdisplay.• RS485/BacnetMS/TPfordirectdigitalreadingonallmod-els

AirQualityNodeisdesignedforenvironmentmonitoringandcontrollinginindustrial,commercialandotherbuildings.Thesetransmitterscanbeusedtomonitorairqualityandtemperatureinvariousindustrialandcommercialsettings.ModbusRS485/BacnetMS/TPfordirectdigitalreadingonallmodels.

SpecificationsTypical Applica-tion

Wallmountindoors

RS485 ports 1Power 15-24V+/-10%,ACorDC,1watttypicalOperating Temp -30~+60°C,0-95%noncondensingPlastic Housing FlammabilityratingUL94V0fileE194560Display LCDscreen,Resolution0.1°C,0.1%RHControl Features N/AAnalog Output10v4-20mAProtocols Bacnet&ModbusTEMP SensorType 10Kthermistor

Range -40~150°C(-60~340°F)Accuracy <±0.5°C@25°COutput 4-20mA,0-5Vor0-10V,RS485

Relative Humidity SensorType CapacitancepolymerRange 0~100%noncondensingAccuracy 3%RH(25°C,20~80%RH)Output 4-20mA,0-5Vor0-10V,RS485

AQ SensorType TGS2600Size 80.5(L)x80.5(W)x22.4(H)mm

AQ-N-LCD

AQ-N

Air Quality Node

Dimension

AQ-N-LCD

AQ-N

Air Quality Node

Backplate Features

Toinsertwiresintothenuscrewterminalsthereisasmalltrickwhichmaynotbeapparenttofolkswhohavenotusedtheseterminalsbefore.Stripthewireabouthalfacentimeterandtwistthestandstogetherifitsstrandedconductor,Gentlypresstheendofasallflatscrewdriverintothewireentryport,insertthewireintotheholewhilemaintainingpressurewiththescrew-driver.Releasethescrewdriverandtheconnectionismade.Tugonthewiretomakesurethere’sgoodcontactthewireshouldnotpullout.

Air Quality Node

Modbus Register List

Address Bytes Register Description

0to3 4 SerialNumber-4bytevalue.Read-only4to5 2 SoftwareVersion–2bytevalue.Read-only6 1 ADDRESS.DefaultModbusdeviceaddress=2547 1 ProductModel.Thisisaread-onlyregisterthatisusedbythemicrocontroller

todeterminetheproduct8 1 HardwareRevision.Thisisaread-onlyregisterthatisusedbythemicrocon-

trollertodeterminethehardwarerev9 1 PICfirmwareversion10 1 PLUG_N_PLAY_ADDRESS,‘plugnplay’address,usedbythenetwork

mastertoresolveaddressconflicts.SeeVCcodeforalgorithms15 1 BaudrateSetting:0=9600bps,1=19200bps,2=38400bps,3=57600bps,4=11

5200bps16 1 FirmwareUpdateRegister,usedtoshowthestatusoffirmwareupdates

17to99 Blank,forfutureuse100 2 adcvalueofco2voltageoutput,notused,readonly101 2 adcvalueoftemperaturevoltageoutput,notused,readonly102 2 adcvalueofhumidityvoltageoutput,notused,readonly103 2 adcvalueofco2currentoutput,notused,readonly104 2 adcvalueoftemperaturecurrentoutput,notused,readonly105 1 adcvalueofhumiditycurrentoutput,notused,readonly106 2 adcvalueofonboardthermistorsensor,readonly107 2 adcvalueofonboardlightsensor,readonly108 2 co2value(ppm).Itwillbecalibratedifwritetoit.109 2 co2calibrationoffset.Usercanchangeittocalibratetheco2ppm.Itwillbe

changedalsoifuserwritethedatatoregisterco2ppm110 1 Deltavalueforeliminatingthepulseppmvalue.Thedefaultvalueis200.111 2 Fitlertimes,maketheppmvaluegosmooth.Thedefaultvalueis5.112 2 Thefairalarmppmsetpointofco2sensor.113 2 Thepooralarmppmsetpointofco2sensor.114 1 co2alarmstatus:

0b'xxxx1xxx':co2poor0b'xxxx01xx':co2fair0b'xxxx001x':co2good

115 1 theversionnumberofhumiditysensor116 2 therelativehumidity117 2 thefrequencyvaluereadfromhumiditysensor,readonly118 1 thenumberofcalibrationpointsofthehumiditysensor119 2 degreecelsiustemperaturevalueofthehumiditysensor120 2 degreefahrenheittemperaturevalueofthehumiditysensor121 2 celsiusdegreetemperaturevalueoftheonboardthermistorsensor

Air Quality Node

Modbus Register List

Address Bytes Register Description

123 2 theoffsetforcalibratingtheonboardthermistorsensor124 1 selectthetemperaturedirecttoanalogoutput:

0:onboardthermistorsensor,defaultsetting1:humiditysensor

125 1 selectthetemperatureunitdirecttoanalogoutput:0:degreecelsius1:degreefahrenheit,defaultsetting

126 2 Lightingvalue,forfeature127 1 analogoutputmode,changeitbysettingthejumper(J20)ontheboard,read

only128 2 theminimumvalueoftemperaturedirectstotheanalogoutput129 2 themaximumvalueoftemperaturedirectstotheanalogoutput130 2 theminimumvalueofhumiditydirectstotheanalogoutput131 2 themaximumvalueofhumiditydirectstotheanalogoutput132 2 theminimumvalueofco2directstotheanalogoutput133 2 themaximumvalueofco2directstotheanalogoutput

e.g.co2output:iftheco2ppmis1000,the(minimumvalue,maximumvalue)=(0,3000),then1.settingJ20toselect0V-10Voutputmode,sotheco2outputisabout((1000ppm/(3000ppm-0ppm))*(10V-0V))+0V=3.3V2.settingJ20toselect0V-5Voutputmode,sotheco2outputisabout((1000ppm/(3000ppm-0ppm))*(5V-0V))+0V=1.65V3.settingJ20toselect4mA-20mAoutputmode,sotheco2outputisabout((1000ppm/(3000ppm-0ppm))*(20mA-4mA))+4mA=9.3mA

184 2 AQvalue

500 1 co2automaticcompensationbackgroundenalbeordisable.0=Disable,1=En-able.

501 2 “BackgroundC02”,defaultis400ppm,minimumis390,maxis500.

502 1 Maximumadjustmentperday”defaultis1ppm,maxis10ppm,minimumis1.

503 1 “Numberofdaystowatchforminimum”,defaultis7days.Maxis30days.Minimumis2days.

505 2 co2backgroundcalibrationoffset.

Air Quality Node

Bacnet Register List

Value ValueandDescription

AV1 SerialNumberLowByteAV2 SerialNumberHighByteAV3 SoftWareVersionAV4 ModbusidAV5 ProductModelAV6 InstanceAV7 StationNumberAV8 BaudRateAV9 UpdateAV10 Protocolswitch.0=MODBUS,1=MSTP.

AV11 Auto/Manual,Analogoutputauto/manualcontrol.Bit1directstotemperatureoutput,0=Auto,1=Manual.

AV12 DewPointAV13 PasswordsAV14 MixingRatio,themassofwateroverthemassofdrygas,[g/kg]AV15 Enthalpyoftheair,[kJ/kg]AV16 SpareAV17 TemperatureOffset

AV18~AV19 SpareAV20 TemperatureFilterAV21 SpareAV22 TemperatureUnitAV23 OutputMode

AV24~AV25 SpareAV26 MinimalRangefortemperatureAV27 MaxiumRangefortemperature

AV28~AV30 SpareAV31 TemperatureSetpointAV32 Spare

AnalogIntput AnalogInputandDescription

AI1 SpareAI2 TemperatureAI3 Spare

AI4 AQ

Air Quality Node

AnalogOutput AnalogOutputandDescription

AO1 SpareAO2 TemperatureAO3 Spare