Ebtron GTC116 Manuel utilisateur



EBTRON • 1663 Hwy. 701 S., Loris SC 29569 • Toll Free: 800.2EBTRON (232.8766) • Fax: 843.756.1838 • Internet: EBTRON.com

Model GTC116

Installation Guide

Gold Series Thermal Dispersion Airflow Measurement Technology

Advantage III

Gold Series by Ebtron



Installation Guide

GTC116

“Plug & Play” Transmitter with

Combination RS-485 Network Output and Dual Analog Output

Document Name: IG_GTC116_R3B



a measurable difference!

EBTRON

BACnet is a registered trademark of ASHRAE. ASHRAE does not endorse, approve or

test products for compliance with ASHRAE standards. Compliance of listed products to

the requirements of ASHRAE Standard 135 is the responsibility of BACnet International

(BI). BTL is a registered trademark of BI.

ModelsGTC116andGTM116

PartNumber930‐0220

LISTED



EuropeanUnion

Shipments



2 EBTRON • 1663 Hwy. 701 S., Loris SC 29569 • Toll Free: 800.2EBTRON (232.8766) • Fax: 843.756.1838 • Internet: EBTRON.com 

GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

EBTRON

IG_GTC116_R3A

TableofContents

1GTC116TRANSMITTERINSTALLATION......................................................................................................................4

1.1GTC116MechanicalDimensions.........................................................................................................................4

2GTC116TRANSMITTERINTERIORVIEW/FEATURES...................................................................................................5

3GTC116TRANSMITTERPOWERANDPROBECONNECTIONS.....................................................................................6

3.1PowerTransformerSelection.............................................................................................................................6

3.2ConnectingPowertotheTransmitter................................................................................................................6

3.3ConnectingSensorProbestotheTransmitter....................................................................................................7

4GTC116ANALOGOUTPUTANDNETWORKCONNECTIONS.......................................................................................8

4.1GTC116‐ANALOGOUTPUTWIRING...................................................................................................................8

4.2GTC116‐RS‐485NETWORKWIRINGCONNECTIONS.........................................................................................9

4.2.1GTC116‐RS‐485NetworkCableSpecifications..........................................................................................9

4.2.2GTC116‐ConnectingtoanRS‐485Network:..............................................................................................9

4.2.3GTC116‐SettingTransmitterTerminationforRS‐485Network.................................................................9

4.3GTC116‐TransmitterSetupforRS‐485NetworkOperation..............................................................................9

4.3.1GTC116‐RS‐485NetworkOptionsandCommunications



MenuSettings..................................................9

4.3.2GTC116‐SettingRS‐485NetworkProtocol...............................................................................................10

4.3.3GTC116‐SettingTransmitterAddress.......................................................................................................10

4.3.4GTC116‐SettingBaudRate.......................................................................................................................10

4.3.5GTC116‐SettingModbusParity..................................................................................................................10

4.3.6GTC116‐SettingBACnetDeviceInstanceNumber.....................................................................................10

4.3.7GTC116‐ResettingCommunications



OptionstoFactoryDefaultValues..................................................10

5GTC116TRANSMITTERSTART‐UP,INITIALIZATIONANDSETUPMENUS.................................................................12

5.1ChangingtheSystemofUnits‐IPorSIUnits...................................................................................................12

5.2GTC116TransmitterCalibration.......................................................................................................................12

5.3GTC116LCDDisplayNotifications.....................................................................................................................12

5.4FactoryDefaultMenuSettingsforGP1SensorProbes.....................................................................................13

5.5GTC116ChangingFactoryDefaultSetupMenuSettings..................................................................................14

5.5.1SetupMenuOptions..................................................................................................................................14

5.5.2AdjustingtheLowLimitCutoffFeature.....................................................................................................14

5.5.3SelectingActualandStandardOutputMeasurementType......................................................................14

5.5.4OutputScaling...........................................................................................................................................14

5.5.5ChangingtheLCDDisplayfromVolumetricFlowCFMtoVelocityFPM....................................................14

5.5.6ConvertingtheAnalogOutputSignalfromFPMtoCFM...........................................................................14

5.5.7LockingtheConfigurationSettings............................................................................................................14

5.6GTC116‐AlarmFeatures..................................................................................................................................15

5.6.1AverageAlarm(AO2ASGN=ALRM)............................................................................................................15

5.6.2TroubleAlarm(AO2ASGN=TRBL)..............................................................................................................15

5.6.3NoFault(NOFAULT=HI)............................................................................................................................15

5.6.4AlarmIndications.......................................................................................................................................15

5.6.5LowAlarm‐“LOALRM=ON”.....................................................................................................................15

5.6.6HighAlarm‐“HIALRM=ON”.....................................................................................................................15

5.6.7TroubleAlarm‐“AO2ASGN=TRBL”...........................................................................................................15

5.7GTC116‐AnalogOutputTypeSelectionandSetup.........................................................................................16

5.7.1GTC116‐ConvertingAnalogOutputSignalValuestoAirflowandTemperature......................................16

5.7.2GTC116‐AO1/AO2OUTPUTTEST‐SendingaTestOutputSignaltotheHostControlSystem..............16

5.8ViewingSensorData.........................................................................................................................................17

5.8.1ViewingSensorDataontheLocalLCDDisplay..........................................................................................17

5.8.2ViewingSensorDataviaBACnet,ModbusnetworksorviaEB‐LinkReader.............................................17

5.8.3SensorAddressingandProbePositioning..................................................................................................17

6SETUPMENUS..........................................................................................................................................................17

7WIRINGDIAGRAM....................................................................................................................................................17

APPENDIXA‐ADVANTAGE3‐SETUPMENUS............................................................................................................18

APPENDIXB‐GTC116WIRINGDIAGRAM...................................................................................................................18



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GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

EBTRON

IG_GTC116_R3A

ListofFigures

Figure1.GTC116MechanicalDimensions....................................................................................................................4

Figure2.GTC116TransmitterInteriorView/Features..................................................................................................5

Figure3.ConnectingPowertotheTransmitter............................................................................................................6

Figure4.TypeAandTypeBTransmitterConnectorPanelDetail.................................................................................7

Figure5.ConnectorDetail.............................................................................................................................................7

Figure6.GTC116CombinationAnalog/RS‐485TransmitterInteriorDetail..................................................................8

Figure7.SensorAddressingandProbePositioningDetail..........................................................................................17



ListofTables

Table1.GTC116PowerTransformerSelectionGuide..................................................................................................6

Table2.GTC116BACnetObjectsList..........................................................................................................................11

Table3.GTC116ModbusRegisterMap......................................................................................................................11

Table4.Standard“IP”and“SI”MenuUnitsAbbreviations........................................................................................12

Table5.FactoryDefaultMenuSettings......................................................................................................................13

Table6.GTC116AlarmTypesandNotifications.........................................................................................................15

Table7.GTC116ConvertingAnalogOutputValuestoAirflow/Temperature.............................................................16



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GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

EBTRON

IG_GTC116_R3A

1GTC116TRANSMITTERINSTALLATION

TheGTC116transmitterisdesignedforuseinanenvironmentbetween‐20°Fto120°F(‐28.8°Cto48.8°C)where

itwillnotbeexposedtorainorsnow.Installtransmitteruprightandinafieldaccessiblelocation.Theenclosure

accepts1/2in.(12.7mm)electricalfittingsforsignalandpowerwiringatbothsidesatthetopoftheenclosure.

Locatethetransmittersothattheconnectingcablesfromallofthesensorprobeswillreachthereceptaclesonthe

bottomofthetransmitterenclosure.

Inlocationsexposedtodirectrainand/orsnow,thetransmittermustbeenclosedinaNEMA4

enclosure.

Leaveunobstructedspaceofatleast9in.(228.6mm)above,2in.(50.8mm)toeachsideand3.5

in.(88.9mm)belowthetransmittertoallowforcoverremoval,sensorconnectionsandheat

dissipation.

Locatethetransmitterinalocationthatcanbereachedbyallconnectingcablesfromthesensor

probes.

Donotdrillintothetransmitterenclosuresincemetalshavingscoulddamagetheelectronics.



1.1 GTC116MechanicalDimensions



Figure1.GTC116MechanicalDimensions

2) IF UNIT HAS 2 PROBE CONNECTIONS THEN IT IS A TYPE "A" UNIT.

IF UNIT HAS 4 PROBE CONNECTIONS THEN IT IS A TYPE "B" UNIT.

NOTES:

1) MEASUREMENTS IN BRACKETS ARE IN MILLIMETERS.

Ø.88

[Ø22.23 mm]

6.69

[169.86 mm]

5.94

[150.81 mm]

1.38

[34.93 mm]

SEE NOTE 2

1.56

[39.67 mm]

Ø.19

[Ø4.76 mm]

2.50

[63.50 mm]

7.94

[201.55 mm]

.38

[9.53 mm]

7.19

[182.55 mm]

8.69

[220.73 mm]

.75

[19.05 mm]

5.19

[131.76 mm]

PROVIDE 3.5 INCH MINIMUM CLEARANCE AT

BOTTOM FOR CONNECTOR ACCESS.

PROVIDE 9 INCH MINIMUM CLEARANCE AT TOP

FOR COVER ACCESS (SLIDE UP TO REMOVE).

PROVIDE 2 INCH MINIMUM CLEARANCE AT BOTH

SIDES OF ENCLOSURE

1.38

[35.05 mm]

[O4.83 mm]

O.19

[182.63 mm]

[201.68 mm]

[9.65 mm]

[39.62 mm] [131.83 mm]

[150.88 mm]

[169.93 mm]

[O22.35 mm]

O.88



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GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

EBTRON

IG_GTC116_R3A

2GTC116TRANSMITTERINTERIORVIEW/FEATURES



Figure2.GTC116TransmitterInteriorView/Features

Outputsignalterminals

(Note:Theoutputfunction

isdependentonwhich

networkcardisinstalled)



LCDcontrast



TransmitterstatusLED

(Green1secondflashnormal;

2secondflashforfault)



Highaccuracy

A/Dconverter



Goldplatedinterconnects

tooptionaloutputcards



Positivelockingcable

receptacleswithgold

interconnects

Powerswitch



Switchingpowersupply

conservesenergyand

reducesheat



Pushbuttoninterface

simplifiesfieldconfiguration

(Note:devicesareplugandplayand

generallydonotrequireconfiguration.)



Expansionport



Multiplexersindependently

measuresensorvoltages

from1upto16sensingpoints



Goldplatedinterconnectsto

sensorinputreceptacles



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GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

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IG_GTC116_R3A

3GTC116TRANSMITTERPOWERANDPROBECONNECTIONS

3.1 PowerTransformerSelection

Selecta24VACtransformerbasedonthemaximumpowerrequirementsindicatedonthetransmitterlabel(20

VA)orfromthetablebelow.Theoperatingsupplyvoltage(transmitterpower“ON”withallsensorprobes

connected)shouldnotbelessthan22.8VACorgreaterthan26.4VAC.



Total

Sensors

Minimum

VAReq.

Total

Sensors

Minimum

VAReq.

Total

Sensors

Minimum

VAReq.

Total

Sensors

Minimum

VAReq.

112514 917 1319

213615 10 17 1419

313715 11 18 1520

414816 12 18 1620



3.2 ConnectingPowertotheTransmitter

Connect24VACpowertothelarge,twopositionpowerinputterminallabeled“POWER”ontheupperrighthand

sideofthemaincircuitboard(Figure3).Sincetheoutputsignalsareisolatedfromthepowersupply,itisnot

necessarytoprovideanisolated(secondarynotgrounded)powersource.



MultipleGTC116transmitterswiredtoasingletransformermustbewired“in‐phase”(L1toL1,

L2toL2).



Table1.GTC116PowerTransformerSelectionGuide

Figure3.ConnectingPowertotheTransmitter

PowerFuse

ReplacewithUL®listed,1.5amp,fastactingonly

P.N.800‐1115(10pack)

24VACInputPower

22.8to26.4VAC

20VAmax.

L1

Power

Switch

REPLACE WITH

1.5 AMP

FAST ACTING ONLY

OUTPUT

1 2 COM

POWER

24VAC IN

L2 L1

OFF



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GOLD SERIES GTC116 TRANSMITTER

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IG_GTC116_R3A

SQUEEZE

RECEPTACLE

LOCKING TABS

LOCKED INTO

UNDERCUT IN

RECEPTACLE

SQUEEZE

3.3 ConnectingSensorProbestotheTransmitter

Afterinstallingthesensorprobesandtransmitter,connecteachofthesensorprobecableplugstothecircular

receptacleslocatedatthebottomoftheGTC116transmitterenclosure.Probesare“PlugandPlay”anddonot

havetobeconnectedtoaspecificreceptacleonthetransmitterunlesstraversedataisdesired(seenotebelow).

TransmittersacceptonlyGP1andGB1sensors.

Providea“driploop”atthetransmitteriftherewillbethepotentialforwaterrunoffor

condensationalongthesensorprobecable(s).

Sensorprobecableplugsare“keyed”asshownbelow.Lineupplugwithreceptacleandpush

straightontoreceptacle.

DONOTTWIST.Squeezecableplug“ribs”towardsreceptaclewhenremoving.Forcingthecable

pluginoroutofthereceptaclewilldamagetheconnectorsandvoidwarranty.

Whentraversedataisdesired(especiallywhenusingtheEB‐LinkReader),probesshouldbe

installedandconnectedtothetransmitterusingthemountingconventionspecifiedinthe

separateGP1/GB1sensorprobeInstallationGuide.Properinstallationsimplifiessensorlocation

decodingduringdataanalysis.



 



Figure4.TypeAandTypeBTransmitterConnectorPanelDetail

Figure 5.ConnectorDetail

TypeBTRANSMITTER

Accepts1to4probesupto4sensorseach

Squeezeandthenpulltoremove

DONOTTWIST!

TypeATRANSMITTER

Accepts1or2probesupto8sensorseach



8 EBTRON • 1663 Hwy. 701 S., Loris SC 29569 • Toll Free: 800.2EBTRON (232.8766) • Fax: 843.756.1838 • Internet: EBTRON.com 

GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

EBTRON

IG_GTC116_R3A

4GTC116ANALOGOUTPUTANDNETWORKCONNECTIONS

ThissectioncontainsanalogandnetworkoutputwiringinstructionsfortheGTC116transmitterwithRS‐485and

DualAnalogoutputs.



4.1 GTC116‐ANALOGOUTPUTWIRING

AnalogoutputconnectionsaremadeatthetopleftofthetransmittermaincircuitboardOUTPUTconnectoras

showninFigure6.IndependentlinearanalogoutputsareprovidedforairflowatOUTPUTterminal1,andfor

temperature(oralarm)atOUTPUTterminal2,eachwithovervoltageandovercurrentprotection.Airflowand

temperatureoutputsarefieldselectableforeither0‐5/0‐10VDCor4‐20mA.TheOUTPUTterminal2canbe

assignedasanAlarmoutputtoprovideanactivehigh,activelowortroublealarmoutput.Outputsaregalvanically

isolatedfromthemainpowersupplytopermitsimpleintegrationwithvirtuallyallbuildingautomationsystems.

Whenconfiguredfor4‐20mAoutput,theGTC116isa“4‐wire”device.Thehostcontrolsshallnotprovide

anyexcitationvoltagetotheoutputoftheGTC116.

Fortheanalogoutputs,shieldedcableisrecommended.Towiretheanalogoutputs,slidethecoverplateupand

offoftheenclosure.Ensurethatthepowerswitchisinthe“OFF”position.Connectsignalwiresforairflowrate

andtemperature(oralarm)tothesmall,threepositionoutputterminallabeled“OUTPUT”ontheupperlefthand

sideofthemaincircuitboardasshowninFigure6.



Figure6.GTC116CombinationAnalog/RS‐485TransmitterInteriorDetail

OFF

OFF ON

ESC ENTER

CONTRAST

REPLACE WITH

1.5 AMP

FAST ACTING ONLY

OUTPUT

1 2 COM

POWER

24VAC IN

L2 L1 ON

OFF

RS-485

NET COM

NET -

NET +

TERM

VDC mA

OUT 1

OUT 2

RS-485

ANALOG OUTPUT

1: Airflow

2: Temperature/Alarm

COM: Common

(RS-485 output below)

Transmitter Status LED

(Green 1 second flash normal;

2 second flash for trouble)

Combination Analog/

RS-485 Output Card

P.N. 800-1825

Analog Output Fuses

F1=OUT1

F2=OUT2

UL Listed 0.125 Amp

P.N. 800-1105 (Qty:10)

NET COM*

NET -

NET +

RS-485

OUTPUT

(For Analog Output, see

separate output above)

Power Switch

LCD Display

SW1 (for OUT1)

Airflow Output Signal Select

SW2 (for OUT2)

Temp./Alarm/Trouble Output

Signal Select

VDC: 0-5/0-10VDC or

mA: 4-20 mA

RS-485 Activity LED

(Green LED indicating RS-485 network activity)

*CAUTION

The common for the ANALOG and the RS-485 outputs must be at the same potential.

For ISOLATED RS-485 output, COM connection MUST BE CONNECTED to network common.

For NON-ISOLATED output, COM connection MUST BE CONNECTED to the common ground that other network devices are using (typically the

ground side of the 24VAC supply - L2 of the POWER terminals). Refer to RS-485 Network Wiring Connections paragraph for additional detail.

off off off off No Termination

off off End of Line

off off Fail-safe Bias

SW3 TERMINATION Switch



EBTRON • 1663 Hwy. 701 S., Loris SC 29569 • Toll Free: 800.2EBTRON (232.8766) • Fax: 843.756.1838 • Internet: EBTRON.com 9

GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

EBTRON

IG_GTC116_R3A

4.2 GTC116‐RS‐485NETWORKWIRINGCONNECTIONS

4.2.1 GTC116‐RS‐485NetworkCableSpecifications

TheRS‐485networkcableshallbeshieldedtwistedpairwithacharacteristicimpedanceof100to130ohms.

Distributedcapacitancebetweenconductorsshallbelessthan100pFpermeter.Distributedcapacitancebetween

conductorsandshieldshallbelessthan200pFpermeter.Themaximumrecommendedlengthofanetwork

segmentis1200meterswithAWG18cable.

4.2.2 GTC116‐ConnectingtoanRS‐485Network:

ConnecttheNET+,NET‐andCOMterminalswithshieldedtwistedpaircablemeetingthespecificationsdefinedin

thepreviousparagraph(typicallyusingtwopairs;onepairfor+/‐and(atleastoneof)thewiresinotherpairfor

COMwhenusing2‐paircable).Theconnectiontothenetworkmustbemadeina"daisychain”configuration."T"

connectionsandstubsareNOTpermitted.Theshieldshouldbeterminatedatoneendonthenetworkonly.



*CAUTION

ForISOLATEDoutput,theCOMconnectionMUSTBECONNECTEDtothenetworkcommonforproper

operation.Inaddition,whentheAnalogOutputisconcurrentlyusedwiththeRS‐485Output,theCommon

connectionforbothAnalogandRS‐485Outputsmustbeatthesamepotential.

ForNON‐ISOLATEDoutput,theCOMconnectionMUSTBECONNECTEDtothecommongroundthatisused

bytheothernetworkdevices(typicallythegroundsideofthe24VACsupply;terminalL2atthePOWER

connectorblockinFigure6).Inaddition,whentheAnalogOutputisconcurrentlyusedwiththeRS‐485

Output,theCommonconnectionforbothAnalogandRS‐485Outputsmustbeatthesamepotential.

4.2.3 GTC116‐SettingTransmitterTerminationforRS‐485Network

The GTC116 is shipped with the Termination switch set for No termination, which is the recommended setting

for devices installed on the network bus anywhere EXCEPT at the ends of the bus/segment. EBTRON

recommends the following termination strategy for devices connected at the ends of the network

bus/segment:

When the transmitter is at one end of the network, it should be terminated with “End of Line” (or 120 ohm

standard) termination, and the device at the other end should be terminated with “Fail Safe Bias”

termination. This method provides proper network termination and ensures that the bus is in a known state

during idle-line conditions (when no devices are driving the bus). EBTRON GTC116 transmitters include

three termination options for “End of Line” (standard 120 ohm) and “Fail-safe Bias” (recommended at one

end of the bus) or for “No Termination”. Termination is selected by setting TERMINATION DIP switch SW3 as

shown below.

Check the network/network segment to ensure that only one device is terminated with either method. If multiple devices

are terminated as described above, network segment operation will be adversely affected.

4.3 GTC116‐TransmitterSetupforRS‐485NetworkOperation

For RS-485 operation, network connections are made on the GTC116 Combination board as shown in Figure

6, and set up is as follows. Network protocol, MS/TP address, device instance number and baud rate options

are all selected with- in the NETWORK section of SETUP menu shown in Appendix A.

NOTE:

Prior to power up, network configuration and termination switches must be set as shown in Figure 6.

Wiring to the RS-485 network is accomplished after setting the GTC116 network configuration switches.

4.3.1 GTC116‐RS‐485NetworkOptionsandCommunications



MenuSettings

The transmitter is shipped from the factory with the protocol set for BACnet MS/TP Master, address 2, MS/TP

Device ID 2, Baud rate of 76,800 and no termination. Initial RS-485 communications settings are

accomplished within the GTC116 NETWORK sub menu shown in Appendix A. Termination is set up by the

TERM DIP switch SW3 located on the Combination card shown in Figure 6.



10 EBTRON • 1663 Hwy. 701 S., Loris SC 29569 • Toll Free: 800.2EBTRON (232.8766) • Fax: 843.756.1838 • Internet: EBTRON.com 

GOLD SERIES GTC116 TRANSMITTER

a measurable difference!

EBTRON

IG_GTC116_R3A

4.3.2 GTC116‐SettingRS‐485NetworkProtocol

Transmitter protocol can be set for MS/TP or MODBUS as shown in the NETWORK submenu (Appendix A).

Tables 2 and 3 list the specific features of each protocol.

4.3.3 GTC116‐SettingTransmitterAddress

The GTC116 is factory set to an address of 2. Each transmitter must be assigned a unique address between 0

and 127 for BACnet or 1 and 247 for Modbus prior to connecting it to the network. Set the address in the

NETWORK submenu (Appendix A).

4.3.4 GTC116‐SettingBaudRate

The GTC116 transmitter default baud rate for MS/TP is 76,800 and for MODBUS is 19,200. Baud rate can be

configured in the NETWORK sub menu (Appendix A).

4.3.5 GTC116‐SettingModbusParity

When using Modbus communications protocol, Parity can be changed in the NETWORK submenu. Parity can

be set for Even (default), Odd, None 1 (with 1 stop bit), or None 2 (with 2 stop bits).

4.3.6 GTC116‐SettingBACnetDeviceInstanceNumber

When using BACnet communications protocol, the factory default Device Instance Number is 2. Device

Instance Number can be set as shown in the NETWORK submenu. Device Instance Number can also be

changed to any number between 0 and 4,194,302 by writing to the Device Object's Object Identifier Property

over the network.

4.3.7 GTC116‐ResettingCommunications



OptionstoFactoryDefaultValues

Communications options can be reset to factory default values (asterisk) * values using the GTC116 RESET

NET menu option.

Table des matières

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