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Electric steam humidifier · BACnet points list

Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module BACnet points list

Updated 6 November 2026

Short answer

The NEPIC module gives older SK300 and SKE steam humidifiers a BACnet MS/TP interface (B-ASC). It serves 83 objects: humidity, water level and temperature readings, writable demand, setpoint, delay, PID and offset values, operating and input status, alarm flags, input type options and control, operation and source selectors.

This page lists 83 BACnet objects for the Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module — 61 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
SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module
Equipment
Electric steam humidifier
Equipment type
Humidifiers
BACnet objects
83 (61 writable)
Transport
BACnet MS/TP
Firmware
1.00
Default device instance
153000
Also known as
SK300, SKE, Neptronic SK300, Neptronic SKE, NEPIC, SK300-BACNET, SKE-BACNET
Source document
SK300 Steam Humidifier BACnet Communication Module User Guide (SK300 Humidifier Object Table) · SK300-BACNET · rev. Rev 060606
Download CSV 83 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against Neptronic’s current documentation and the live device before use. Not official Neptronic information. Terms of use.

BMS integration notes: Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module

Integration in brief

Set the baud with DIP switches 2-3 and give the module a unique MAC and device instance. For BMS demand control set MSV 1 Ctl_Mode to 3 (remote) and write AV 1 Humidity_Demand; for internal PID set MSV 1 to 2, choose the setpoint and humidity sources (MSV 4, MSV 5) and write AV 11 and AV 2. MSV 2 turns the unit on, off or to drain.

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 2Operation_ModeUnit off, on or drainWrite
MV 1Ctl_ModeControl mode; 3 = demand from BACnetWrite
AV 1Humidity_DemandHumidity demand from the BMS, %Write
AV 11Ctl_SPHumidity setpoint for internal PID, %RHWrite
AV 2Room_HumidityRoom RH from the BMS (remote source)Write
BI 1Power_StatusUnit power onRead
AI 1Humidity_OutHumidifier output, %Read
BI 5Alrm_Not_CriticalNon-critical alarm, unit still runningRead
BI 6Alarm_CriticalCritical alarm, unit stoppedRead

Enable & remote start

MSV 2 Operation_Mode sets the unit off (1), on (2) or to drain (3). MSV 1 Ctl_Mode picks the demand source: 1 = local analog input, 2 = internal PID, 3 = remote demand over BACnet.

Sensors & values from the BMS

With MSV 5 Room_Hum_Source = 2 (remote) and MSV 6 Duct_Hum_Source = 3 (remote) the BMS writes AV 2 Room_Humidity and AV 3 Duct_Humidity; MSV 4 SP_Source = 3 takes the setpoint from BACnet.

Network setup

Watch out for

Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module 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.

83 of 83 shown
Type
Multi-state
Access
Show
Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module BACnet Points List
DescriptionStates
AImin1Humidity_OutHumidity Output (range 0-100 %RH)%RHRead
AI2Water_LevelWater level (range 0-120%)%Read
AI3Delay_to_DrainDelay until Drain (range 0-100Hrs)hoursRead
AI4Water_TempWater Temperature (range 0-260 °C or 32-500 °F)°C/°FRead
AI5Chimney_TempChimney Temperature (range 0-260 °C or 32-500 °F)°C/°FRead
AI6SSR_TempSolid State Relay Temperature (range 0-260 °C or 32-500 °F)°C/°FRead
AI7Op_DelayOperation Delay (range 0-5000Hrs)hoursRead
AVmin1Humidity_DemandHumidity Demand (range 0-100 %RH)%RHWrite
AVmin2Room_HumidityRoom Humidity (range 0-100 %RH)%RHWrite
AV3Duct_HumidityDuct Humidity (range 0-100 %RH)%RHWrite
AV4Drain_DelayDrain Delay (range 1-100Hrs)hoursWrite
AV5Svc_DelayService Delay (range 1-5000Hrs)hoursWrite
AV6EOS_DelayEnd of season delay (range 1-250Hrs)hoursWrite
AV7PID_Loop_KPPID Loop gain KP (range 0-255)Write
AV8PID_Loop_KIPID Loop gain KI (range 0-255)Write
AV9PID_Loop_KDPID Loop gain KD (range 0-255)Write
AV10Ctl_BandControl band (range 0-20.0%)%Write
AVmin11Ctl_SPControl set point (range 0-100%RH)%RHWrite
AV12Extern_SP_MinExternal set point minimum (range 0-100%RH)%RHWrite
AV13Extern_SP_MaxExternal set point maximum (range 0-100%RH)%RHWrite
AV14Duct_Hum_HL_SPDuct hum. high limit set point (range 50-100%RH)%RHWrite
AV15Fan_Min_On_TimeMinimum ON time for fan (range 2-20 minutes)minWrite
AV16Min_Water_TempMin water temp. in On (range 10-90 °C or 50-194 °F (0 -> Mode is Off))°C/°FWrite
AV17Antifreeze_TempAnti-freeze mode temp (range 4-10 °C or 39-50°F (0 -> Mode is Off))°C/°FWrite
AV18Room_Hum_OffsetRoom Humidity offset (range ±0-20 %RH)%RHWrite
AV19Duct_Hum_OffsetDuct Humidity offset (range ±0-20 %RH)%RHWrite
AV20Water_Temp_OffsetWater Temperature offset (range ±0-20 °C or ±0-40 °F)°C/°FWrite
AV21Water_Lvl_OffsetWater Level offset (range ±0-20%)%Write
AV22SSR_Temp_OffsetSSR Temperature offset (range ±0-20 °C or ±0-40 °F)°C/°FWrite
AV23Lock_On_CapLock On capacity (range 10-100%)%Write
AV24Max_Out_LimitMaximum output limit (range 10-100%)%Write
AV25Outside_TempOutside Temperature (range -40 - 40 °C or -40 - 104 °F)°C/°FWrite
BImin1Power_StatusPower StatusRead0=OFF, 1=ON
BI2DemandDemandRead0=NO, 1=YES
BI3Auto_DrainAuto DrainRead0=NO, 1=YES
BI4Manual_DrainManual DrainRead0=NO, 1=YES
BImin5Alrm_Not_CriticalAlarm not critical (unit running)Read0=NO, 1=YES
BImin6Alarm_CriticalAlarm critical (unit not running)Read0=NO, 1=YES
BI7EOS_Delay_StatusEnd of Season DelayRead0=NO, 1=YES
BI8Fan_ProofFan proof StatusRead0=OFF, 1=ON
BI9Hi_Lim_StatusHi-Limit StatusRead0=OFF, 1=ON
BI10InterlockInterlockRead0=OFF, 1=ON
BI11Power_FusePower Fuse (24VAC)Read0=OFF, 1=ON
BI12KlixxonKlixxonRead0=OFF, 1=ON
BI13Ext_Therm_FuseThermal fuse (external 24VAC)Read0=OFF, 1=ON
BI14Int_Therm_FuseThermal fuse (internal 24VDC)Read0=OFF, 1=ON
BI15Foam_ProbeFoam ProbeRead0=OFF, 1=ON
BV1Over_Temp_ONOver temperature contact ONWrite0=Normal, 1=Alarm
BV2Pwr_Fuse_OpenPower fuse (24VAC) openWrite0=Normal, 1=Alarm
BV3Ext_Th_Fuse_OpenThermal Fuse open (24VAC)Write0=Normal, 1=Alarm
BV4Int_Th_Fuse_OpenThermal Fuse open (24VDC)Write0=Normal, 1=Alarm
BV5Hi_Duct_HumHigh humidity level in the ductWrite0=Normal, 1=Alarm
BV6Low_Input_VoltInput voltage too lowWrite0=Normal, 1=Alarm
BV7Bad_Tank_SensorTank sensor defectiveWrite0=Normal, 1=Alarm
BV8Bad_SSR_SensorSSR sensor defectiveWrite0=Normal, 1=Alarm
BV9Bad_Water_SensorWater level probe defectWrite0=Normal, 1=Alarm
BV10Foam_Sensor_ONFoam Sensor ONWrite0=Normal, 1=Alarm
BV11Low_Tank_TempTank temperature too low (freeze)Write0=Normal, 1=Alarm
BV12Hi_Tank_TempTank temperature too highWrite0=Normal, 1=Alarm
BV13Hi_SSR_TempSSR temperature too highWrite0=Normal, 1=Alarm
BV14Bad_Fill_TankDefective filling tankWrite0=Normal, 1=Alarm
BV15Bad_Refill_TankDefective refill tank (too long)Write0=Normal, 1=Alarm
BV16Bad_Drain_TankDefective draining tankWrite0=Normal, 1=Alarm
BV17Duct_Hi_Lim_CODuct Hi limit cut-outWrite0=Normal, 1=Alarm
BV18Interlock_In_OpenInterlock Input OpenWrite0=Normal, 1=Alarm
BV19Hum_Clean_TimeHumidifier started cleaning periodWrite0=Normal, 1=Alarm
BV20Hum_Svc_TimeHumidifier exceeded service timeWrite0=Normal, 1=Alarm
BV21Demand_SP_TypeDemand-Set point typeWrite0=Voltage, 1=Current
BV22Demand_SP_SpanDemand-Set point spanWrite0=2-10VDC, 1=0-10VDC
BV23Humidity_In_TypeHumidity input typeWrite0=Voltage, 1=Current
BV24Humidity_In_SpanHumidity input spanWrite0=2-10VDC, 1=0-10VDC
BV25Hi_Lim_In_TypeHi-limit humidity input typeWrite0=Voltage, 1=Current
BV26Hi_Lim_In_SpanHi-limit humidity input spanWrite0=2-10VDC, 1=0-10VDC
BV27Temp_UnitsTemperature UnitsWrite0=Celsius, 1=Fahrenheit
BV28Outside_Temp_CompOutside Temperature CompensationWrite0=OFF, 1=ON
BV29Alarm_BeepAlarm BeepWrite0=OFF, 1=ON
BV30Reload_FactoryReload Factory default valueWrite0=NO, 1=YES
MVmin1Ctl_ModeControl ModeWrite1=Local Demand from Analog Input 1, 2=Internal PID calculation, 3=Demand from remote communication port (e.g. BACnet®)
MVmin2Operation_ModeOperation ModeWrite1=Set unit Off, 2=Set unit On, 3=Set unit in drain mode
MV3Unit_Display_LangUnit Display LanguageWrite1=English (Default), 2=French, 3=Spanish
MV4SP_SourceSet point SourceWrite1=Local analog input 1, 2=Local Internal digital value, 3=Remote from communication port (e.g. BACnet®)
MV5Room_Hum_SourceRoom Humidity sourceWrite1=Local analog input 2, 2=Remote from communication port (e.g. BACnet®)
MV6Duct_Hum_SourceDuct Humidity sourceWrite1=Not used, 2=Local analog input 3, 3=Remote from communication port (e.g. BACnet®)
Object ID lookup: Neptronic SK300 / SKE (legacy) point IDs by name

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. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module 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 SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module

How many BACnet points does the Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module have?

This list has 83 BACnet objects: 7 analog inputs, 25 analog values, 15 binary inputs, 30 binary values, 6 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module BACnet points are writable?

61 of the 83 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 SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module BACnet documentation?

The source is SK300 Steam Humidifier BACnet Communication Module User Guide (SK300 Humidifier Object Table) (SK300-BACNET), revision Rev 060606, published free by Neptronic at https://www.neptronic.com/humidifiers/PDF/SK300/SK300-bacnet-user-guide.pdf.

What are the minimum BACnet points to integrate the Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module?

Start with MV 2 Operation_Mode (Unit off, on or drain); MV 1 Ctl_Mode (Control mode; 3 = demand from BACnet); AV 1 Humidity_Demand (Humidity demand from the BMS, %); AV 11 Ctl_SP (Humidity setpoint for internal PID, %RH); AV 2 Room_Humidity (Room RH from the BMS (remote source)); BI 1 Power_Status (Unit power on); AI 1 Humidity_Out (Humidifier output, %); BI 5 Alrm_Not_Critical (Non-critical alarm, unit still running); BI 6 Alarm_Critical (Critical alarm, unit stopped).

How do I enable BMS control of the Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module?

MSV 2 Operation_Mode sets the unit off (1), on (2) or to drain (3). MSV 1 Ctl_Mode picks the demand source: 1 = local analog input, 2 = internal PID, 3 = remote demand over BACnet.

Can the BMS supply sensor values to the Neptronic SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module?

With MSV 5 Room_Hum_Source = 2 (remote) and MSV 6 Duct_Hum_Source = 3 (remote) the BMS writes AV 2 Room_Humidity and AV 3 Duct_Humidity; MSV 4 SP_Source = 3 takes the setpoint from BACnet.

How do I check these points on the real SK300 / SKE (legacy) Steam Humidifier with NEPIC BACnet module?

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: SK300 Steam Humidifier BACnet Communication Module User Guide (SK300 Humidifier Object Table) · SK300-BACNET · rev. Rev 060606. Object names, instances and units are reproduced as published; descriptions are our own.