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VAV terminal unit controller · BACnet points list

Neptronic EVCB44N Series VAV Controller BACnet points list

Updated 28 October 2026

Short answer

The EVCB44N is a newer-generation Neptronic VAV controller that communicates over BACnet MS/TP with a fixed object table, plus schedule, program and file objects. Points include zone temperature, humidity, CO2 and VOC readings from the room sensor, setpoints, demands and airflow. Pressure-dependent models do not use the airflow objects.

This page lists 122 BACnet objects for the Neptronic EVCB44N Series VAV Controller — 94 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Neptronic’s own free documentation, linked below.

Manufacturer
Neptronic
Model
EVCB44N Series VAV Controller
Equipment
VAV terminal unit controller
Equipment type
VAV boxes & fan coils
BACnet objects
122 (94 writable)
Transport
BACnet MS/TP
Firmware
5.10 (as printed)
Default device instance
153000 + MAC address
Also known as
EVCB44N, EVCB44NIT0S, EVCB44NDT0S
Source document
EVCB44N Series BACnet Communication Module User Guide · EVCB44NxS-V5.10-BACnet Guide-251121 · rev. 2025-11-21
Download CSV 122 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Download Easy BACnet Mobile App Google Play

BMS integration notes: Neptronic EVCB44N Series VAV Controller

Integration in brief

Read the zone temperature, setpoint, demands and airflow, and drive occupancy with MSV.11. To control from a BMS space temperature, set MSV.4 to Network Sensor and keep writing AV.1 ControlTemp faster than the NetworkTimeOut period (AV.145).

Minimum points to map

The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.

ObjectNameWhyAccess
MV 11NsbOccCommandBMS occupancy / night setback / off commandWrite
AV 15TempSetPointOccupied/day zone setpointWrite
MV 4Cfg_TempControlSourceSelect internal, external or network temperatureWrite
AV 1ControlTempControl temp; BMS writes it when MSV.4 = Network SensorWrite
MV 12OccupancyStatusActual occupancy stateRead
AV 110ActualAirFlowMeasured airflowRead
AV 111AirFlowSetPointAirflow setpoint calculated from demandRead
AV 20HeatingDemand1Heating ramp demand, %Read
AV 40CoolingDemand1Cooling ramp demand, %Read
BV 53AL_AirFlowErrorAirflow problem alarm (0 = No, 1 = Yes)Read

Enable & remote start

Occupancy and off are commanded with MSV.11 NsbOccCommand: Locally (wired input/sensor decides), Occupancy, No Occupancy (night setback) or OFF. Changeover can also be forced by the BMS through MSV.3 Cfg_ChangeOverControlMode.

Heartbeat & communication loss

AV.145 NetworkTimeOut (0-60 min): when the temperature source is Network/Remote and the BMS has not written a temperature within this time, the EVC goes to OFF and AV.1 shows 999°C in fault. Setting it to 0 makes AV.1 fall back to the AV.15 setpoint value instead.

Sensors & values from the BMS

Set MSV.4 Cfg_TempControlSource to Network Sensor; AV.1 ControlTemp then becomes writable and must be refreshed by the BMS (see AV.145).

Network setup

Watch out for

Neptronic EVCB44N Series VAV Controller BACnet objects

Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.

122 of 122 shown
Type
Multi-state
Access
Show
Neptronic EVCB44N Series VAV Controller BACnet Points List
DescriptionStates
AI1AnalogInput1Status value in volts of Analog Input 1. Value is active onlyVRead
AI3InternTempIntern temperature sensor (ITS)°F/°CRead
AI5InternHumidityHumidity reading of on board humidity sensor of TRLH or TRLGH24/TDU (models%RHRead
AI6TrlgCO2CO reading of on-board sensor of TRLG24 or TRLGH24/TDU (models 2 withppmRead
AI8InternVOCSensorInternal VOC sensor reading in ppbppbRead
AO1AnalogOutput1Modulation percentage of analog output 1 based on demand%Write
AVmin1ControlTempControl temperature; writable when MSV.4 is Network Sensor°F/°CWrite
AV2ExternTempExtern temperature sensor (ETS)°F/°CRead
AV3ChangeOverTempChangeover temperature sensor (SENS)°F/°CRead
AV4AirSupplyTempAir supply temperature sensor (AST)°F/°CRead
AV5CO2SensorCarbon dioxide sensor (CO2)ppmRead
AV6Ram_Ctl_SetPointActual temperature control setpoint value°F/°CRead
AV10Cfg_InternTempOffsetTo calibrate the integrated temperature sensor of the TRL/TDU (ITS)°F/°CWrite
AV11Cfg_ExternTempOffsetTo calibrate the external temperature sensor (ETS)°F/°CWrite
AVmin15TempSetPointActual user setpoint of the zone in occupied/day mode°F/°CWrite
AV16Cfg_MinpSetPointUser minimum permitted setpoint of the zone in occupied/day mode°F/°CWrite
AV17Cfg_MaxpSetPointUser maximum permitted setpoint of the zone in occupied/day mode°F/°CWrite
AV18SetPointCoolNoOccNSBCooling setpoint when in night setback or unoccupied°F/°CWrite
AV19SetPointHeatNoOccNSBHeating setpoint when in night setback or unoccupied°F/°CWrite
AVmin20HeatingDemand1Heating demand in percentage for Heating Ramp 1. This value is based%Read
AV21Cfg_HeatingPropBand1Range through which the controller will modulate the heating output from 0-100%°F/°CWrite
AV22Cfg_HeatingDeadBand1Range where the controller will not take action when below the zone°F/°CWrite
AV23HeatingDemand2Heating demand in percentage for the Heating Ramp 2. This value is%Read
AV24Cfg_HeatingPropBand2Range through which the controller will modulate the heating output from 0-100%°F/°CWrite
AV25Cfg_HeatingDeadBand2Range where the controller will not take action when below the zone°F/°CWrite
AV30Cfg_IntegralTimeHeatingReciprocal of the integral time in seconds (1/I or repeats per second)sWrite
AVmin40CoolingDemand1Cooling demand for Cooling Ramp 1. This value is based on zone%Read
AV41Cfg_CoolingPropBand1Range through which the controller will modulate the cooling output from 0-100%°F/°CWrite
AV42Cfg_CoolingDeadBand1Range at which the controller will not take action when above the°F/°CWrite
AV45CoolingDemand2Cooling demand for Cooling Ramp 2. This value is based on zone%Read
AV46Cfg_CoolingPropBand2Range through which the controller will modulate the cooling output from 0-100%°F/°CWrite
AV47Cfg_CoolingDeadBand2Range at which the controller will not take action when above the°F/°CWrite
AV50Cfg_IntegralTimeCoolingReciprocal of the integral time in seconds (1/I or repeats per second)sWrite
AV55ChangeOverDemandChangeover demand for the VAV box%Read
AV56Cfg_ChangeOverPropBandRange through which the controller will modulate the cooling and heating output°F/°CWrite
AV57Cfg_ChangeOverDeadBandRange at which the controller will not take action when above or°F/°CWrite
AV58ChangeOverSetPointTemperature at which the primary air from the central system is considered°F/°CWrite
AV60Cfg_NSBSetBackOverrideDelayTime in minutes when in night setback and an override has beenminWrite
AV61Cfg_NoOccOverrideDelayTime in minutes when unoccupied and an override has been activated onminWrite
AV62Cfg_OccupancyMinTimeTime in minutes for minimum time to maintain occupancy mode after aminWrite
AV70Cfg_AnalogOutput1MinMinimum control signal of the controlled elementVWrite
AV71Cfg_AnalogOutput1MaxMaximum control signal of the controlled elementVWrite
AV89Cfg_MotorMinPositionCoolHeatMinimum position in cooling/heating mode the VAV box is allowed%Write
AV90Cfg_MotorMinPositionCoolMinimum position in cooling mode the VAV box is allowed%Write
AV91Cfg_MotorMinPositionHeatMinimum position in heating mode the VAV box is allowed%Write
AV93MotorPositionDamper actuator position%Read
AV100Cfg_PressureNumFilterTo stabilize the reading of the differential pressure transducer when balancingsWrite
AV101Cfg_AirFlowVnomOrKFactorMaximum airflow of the VAV box at 1" w.cWrite
AV102Cfg_AirFlowCoolMinMinimum cooling airflow when system is in cooling modeWrite
AV103Cfg_AirFlowCoolMaxMaximum cooling airflow when system is in cooling mode%Write
AV104Cfg_AirFlowHeatMinMinimum heating airflow when system is in heating modeWrite
AV105Cfg_AirFlowHeatMaxMaximum cooling airflow when system is in heating mode%Write
AV106Cfg_AirFlowIntegralTimeReciprocal of the integral time in seconds (1/I or repeats per second)minWrite
AVmin110ActualAirFlowActual converted airflow measured by the differential pressure transducerRead
AVmin111AirFlowSetPointAirflow calculated by demandRead
AV112Cfg_AdjustAirFlowMaxDuring airflow balancing sequenceWrite
AV113Cfg_AdjustAirFlowMinDuring airflow balancing sequenceWrite
AV114Cfg_AirFlowOffsetTo adjust the calibration of the differential pressure transducerWrite
AV116Cfg_AirFlowHysteresisStopAirflow setpoint percentage used to prevent damper actuator oscillations%Write
AV117Cfg_AirFlowHysteresisStartAirflow setpoint percentage used to prevent actuator from oscillations%Write
AV133Cfg_Pressure_ReadingPressure sensorPaRead
AV135AirFlowFaultDeadBandAirflow dead band used when BV.52 is activated%Write
AV136AirFlowFaultErrorAirflow fault error used when BV.52 is activated%Write
AV137AirFlowFaultHysteresisAirflow fault hysteresis used when BV.52 is activated%Write
AV138AirFlowFaultTimeAirflow fault time used when BV.52 is activatedminWrite
AV140CO2RangeMaximum range of the CO2 sensor (PPM) or the external sensor ifppmWrite
AV141CO2SetpointMaximum limit of CO2 concentration before the EVC sends an alarmppmWrite
AV145NetworkTimeOutBMS temperature timeout when control source is networkminWrite
AV165CopyCfgStartAddressWhen using copy config, this value represents the first address in theWrite
AV166CopyCfgEndAddressWhen using copy config, this value represents the last address in theWrite
AV167CopyCfgResultWhen using copy config, this value is used to verify that theWrite
AV170CL_HT_SwitchTimerTime required before the changeover is permitted to take place (time inminWrite
AV171CL_HT_SwitchTimerCountRemaining time before the changeover is authorisedsRead
AV190Cfg_CO2PropBandRange through which the controller modulates the CO control output from 0ppmWrite
AV191Cfg_CO2DeadBandRange at which the controller will not take action when below orppmWrite
AV192AverageTempAverage temperature of the combination of sensors selected using MSV.45 Cfg_TempSensorCombo°F/°CRead
AV193MaximumTempMaximum temperature of the combination of sensors selected using MSV.45 Cfg_TempSensorCombo°F/°CRead
BI3InternPIRInternal PIR sensor value: (0) NoOccupancy, (1) OccupancyRead0 = NoOccupancy 1 = Occupancy
BV1Cfg_TempUnitBACnetTemperature units used in BACnetWrite0 = Celsius, 1 = Fahrenheit
BV2Cfg_TempSetPointLockLock the zone setpoint and prevent users changing the valueWrite0 = Disable, 1 = Enable
BV3UserSysOffModeAllow users to turn off the EVC. (0) Enable user to turnWrite0 = Enable, 1 = Disable
BV4Cfg_TempUnitTstatUser temperature units used on TRL/TDU. If set to (0), the temperatureWrite0 = Celsius, 1 = Fahrenheit
BV5ChangeOverModeActual mode (0) Cooling, (1) HeatingWrite0 = Cooling, 1 = Heating
BV6Cfg_FreezeProtectionPrevent a zone from falling below 4°C (39.2°F)Write0 = Off, 1 = On
BV7Cfg_KeyPadUpperLeftLockLock the Cool/Heat buttonWrite0 = Off, 1 = On (If set to “On”, functionality of these buttons will not be available.)
BV8Cfg_KeyPadBottomLeftLockLock the °C/°F buttonWrite0 = Off, 1 = On If set to “On”, functionality of these buttons will not be available.
BV9Cfg_KeyPadArrowsLockLock the arrow buttonsWrite0 = Off, 1 = On If set to “On”, functionality of these buttons will not be available.
BV10Cfg_ProgramLockLock all TRL/TDU buttonsWrite0 = Off, 1 = On If set to “On”, functionality of these buttons will not be available.
BV20Cfg_NightSetBackModeDetermine the action of the EVC when in night setbackWrite0 = Setpoint, 1 = OFF
BV23Cfg_OccControlSourceDetermines the source of occupancy control to be used by the EVCWrite0 = Reserved, 1 = Intern Sensor
BV25Cfg_AnalogOutput1DirectionAnalog output directionWrite0 = Direct, 1 = Reverse
BV40Cfg_MotorDirectionDamper actuator rotation direction configurationWrite0 = Direct, 1 = Reverse
BV41Cfg_MotorPosControlTempFaultControl mode configuration for motor position when there is a temperature faultWrite0 = Close, 1 = Open
BV45AirFlowBalancingAirflow balancing enables configurationWrite0= Disable, 1= Enable
BV50Cfg_PressureModeSelectTo configure the VAV box as (0) pressure independent or (1) pressureWrite0= Independent, 1= Dependent
BV51PressureModeStatusActual pressure modeRead0= Independent, 1= Dependent
BV52PressureModeAutoChangeTo enable the VAV box to pass from pressure independent to pressureWrite0 = Off, 1 = On
BVmin53AL_AirFlowErrorAirflow error statusRead0= No, 1= Yes
BV55AL_HighCO2LevelCO2 concentration above setpoint statusRead0= No, 1= Yes
BV60Cfg_DisplayRHDetermines if the digital room sensor displays the %RH valueWrite0= Off, 1= On
BV65Cfg_DisplayCO2Determines if the digital room sensor displays the CO2 valueWrite0= Off, 1= On
BV66Cfg_CO2ControlSourceCO2 reading source for controlWrite0= Analog Input, 1= TRLG
BV70Cfg_ActiveScheduleSchedule activation configurationWrite0= No, 1= Yes
BV90CopyCfgExecuteWhen using copy config, this value is used to start the copyWrite0= No, 1= Yes
BV100Cfg_Fan Always On ModeFan operation configuration when an output is configured as "Fan On". WhenWrite0 = On, 1 = Off
BV101Cfg_CO2ControlModeControl mode configuration for the CO control outputWrite0 = Open, 1 = Control ramp loop
MV1Cfg_UniversalInputAI1TypeInputWriteOff Extern Sensor Changeover Sensor ChOvContactNormCool ChOvContactNormHeat Airflow Setpoint* CO2 Sensor Air Supply Temp Motor Position SensorExtern50K** TSTAT temp sensor** TSTAT Setpoint** TSTAT Setpoint 2-10V** * not available with EVCB44NDT0S ** only available with EVCB44NIT0S
MV3Cfg_ChangeOverControlModeIndicates where the changeover value is coming fromWriteLocally Cooling Heating
MVmin4Cfg_TempControlSourceControl temperature source configuration: Intern Temp, the control temperature will be setWriteIntern Sensor Extern Sensor Network Sensor
MVmin11NsbOccCommandSet the occupancy or night setback modeWriteOFF/Locally/Locally Occupancy/OFF/OFF No Occupancy/Occupancy/Day -- /No Occupancy/Night
MVmin12OccupancyStatusStatus that indicates the actual occupancy when occupancy is usedReadNoOccupancy Occupancy Override
MV13NightSetBackStatusStatus that indicates the actual mode of the zone when night setbackReadDay Night Override
MV16UserSystemModeZone mode the user has set on the TRL/TDU. Not to beWriteAuto Heating Cooling Off
MV17UserSysModeSelectSet the permissions or restrictions to change the zone mode by theWriteAuto Heating Cooling Heating or Cooling Auto Lock
MV20Cfg_AnalogOutput1RampRamp used to modulate AO1 based on demandWriteOff Cooling Ramp1 Cooling Ramp2 Heating Ramp1 Heating Ramp2 AirFlow Read CO2 Alarm Airflow Setpoint
MV35Cfg_MotorRampRamp used to modulate the damper actuator based on demandWriteCooling Ramp1 Cooling Ramp2 Heating Ramp1 Heating Ramp2 AirflowSetPoint* Changeover Ramp Cooling Heating Ramp 1 Analog * Airflow setpoint not available with EVCB44NDT0S.
MV36Cfg_NSBMotorModeSet the motor position while in night setbackWriteAuto Open
MV37MotorPositionOverrideTo override the motor positionWriteAuto Open Close Air Flow Min (heat/cool as per current mode) Air Flow Max (heat/cool as per current mode)
MV41Cfg_AirFlowScaleAirflow scale used to get a better resolution when small airflows areWriteScale1 | Scale10 | Scale100
MV42AirFlowBal_ModePosition the damper actuator to preset positionsWriteClosed | Min Flow | Max Flow | Full Open
MV45Cfg_TempSensorComboCombination of sensors for average (AV.192) and maximum (AV.193) temperature readingsWriteTSTAT+AI1 | TSTAT+AI2* | TSTAT+AI1+AI2* | AI1+AI2* *AI2 is not available on EVCB44N series
MV95Cfg_DisplayInfoInformation displayed on the TRL/TDU. Display Temp Demand: the TRL/TDU will displayWriteTemp and Demand | Setpoint and Demand Temp only | Setpoint only | Off

Integration notes

Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the EVCB44N Series VAV Controller and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.

Questions about the Neptronic EVCB44N Series VAV Controller

How many BACnet points does the Neptronic EVCB44N Series VAV Controller have?

This list has 122 BACnet objects: 5 analog inputs, 1 analog output, 71 analog values, 1 binary input, 28 binary values, 16 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Neptronic EVCB44N Series VAV Controller BACnet points are writable?

94 of the 122 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done.

Where is the official Neptronic EVCB44N Series VAV Controller BACnet documentation?

The source is EVCB44N Series BACnet Communication Module User Guide (EVCB44NxS-V5.10-BACnet Guide-251121), revision 2025-11-21, published free by Neptronic at http://www.neptronic.com/Controls/pdf/2026/EVCB44NxS-V5.10-BACnet%20Guide-251121.pdf.

What are the minimum BACnet points to integrate the Neptronic EVCB44N Series VAV Controller?

Start with MV 11 NsbOccCommand (BMS occupancy / night setback / off command); AV 15 TempSetPoint (Occupied/day zone setpoint); MV 4 Cfg_TempControlSource (Select internal, external or network temperature); AV 1 ControlTemp (Control temp; BMS writes it when MSV.4 = Network Sensor); MV 12 OccupancyStatus (Actual occupancy state); AV 110 ActualAirFlow (Measured airflow); AV 111 AirFlowSetPoint (Airflow setpoint calculated from demand); AV 20 HeatingDemand1 (Heating ramp demand, %); AV 40 CoolingDemand1 (Cooling ramp demand, %); BV 53 AL_AirFlowError (Airflow problem alarm (0 = No, 1 = Yes)).

How do I enable BMS control of the Neptronic EVCB44N Series VAV Controller?

Occupancy and off are commanded with MSV.11 NsbOccCommand: Locally (wired input/sensor decides), Occupancy, No Occupancy (night setback) or OFF. Changeover can also be forced by the BMS through MSV.3 Cfg_ChangeOverControlMode.

Does the Neptronic EVCB44N Series VAV Controller need a BACnet heartbeat or have a communication timeout?

AV.145 NetworkTimeOut (0-60 min): when the temperature source is Network/Remote and the BMS has not written a temperature within this time, the EVC goes to OFF and AV.1 shows 999°C in fault. Setting it to 0 makes AV.1 fall back to the AV.15 setpoint value instead.

Can the BMS supply sensor values to the Neptronic EVCB44N Series VAV Controller?

Set MSV.4 Cfg_TempControlSource to Network Sensor; AV.1 ControlTemp then becomes writable and must be refreshed by the BMS (see AV.145).

How do I check these points on the real EVCB44N Series VAV Controller?

Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.

More Neptronic BACnet points lists

Source: EVCB44N Series BACnet Communication Module User Guide · EVCB44NxS-V5.10-BACnet Guide-251121 · rev. 2025-11-21. Object names, instances and units are reproduced as published; descriptions are our own.