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Electrode steam humidifier · BACnet points list
Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller) BACnet points list
Updated 12 November 2026
The ElectroVap MC (ELMC) is an electrode-boiler steam humidifier whose V3 controller talks Modbus RTU or BACnet MS/TP on RS485. The BACnet map gives contactor, level, valve and relay states as Binary Inputs, a start/stop Binary Output, current, run status, error code and steam output as Analog Inputs, and setpoint, demand, capacity limit and drain settings as Analog Values.
This page lists 32 BACnet objects for the Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller) — 10 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Devatec’s own free documentation, linked below.
- Manufacturer
- Devatec
- Model
- ElectroVap MC (ELMC) electrode steam humidifier (V3 controller)
- Equipment
- Electrode steam humidifier
- Equipment type
- Humidifiers
- BACnet objects
- 32 (10 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Also known as
- ELMC, ElectroVap MC, ElectroVap ELMC, EHU-750, EHU 750, KIT MC, CMC, Steam Bath SB, Devatec ELMC
Reference only, provided as-is: verify against Devatec’s current documentation and the live device before use. Not official Devatec information. Terms of use.
BMS integration notes: Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller)
Select BACnet MS/TP in the network menu, set a bus address (1-32) and speed, then start/stop the unit with BO 0 and send demand or RH through AV 5 with the control type set to digital control. Watch run status, error code and steam output.
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.
| Object | Name | Why | Access |
|---|---|---|---|
| BO 0 | On/Off BMS command | Start/stop (1 = start requested) | Write |
| AV 5 | RH or demand value (digital or digital probe). | Demand or RH from the BMS, 1-100 % | Write |
| AV 6 | RH set point | Humidity setpoint, %RH | Write |
| AI 3 | Run status | Run status code | Read |
| AI 14 | steam production | Steam output, 10 x kg/h | Read |
| BI 7 | Alarm returns | Alarm feedback | Read |
| AI 9 | Error code | Active error code | Read |
Enable & remote start
BO 0 On/Off BMS command starts (1) or stops (0) the unit.
Sensors & values from the BMS
With the control signal type set to digital control in the humidifier menu, the BMS writes RH or demand (1-100 %) to AV 5.
Network setup
- RS485 on connector J2 (1 Data-, 2 Data+, 3 GND); SW1 switches the line termination and bias resistors.
- The network menu selects Modbus RTU 8-N-1, 8-N-2 or BACnet MS/TP, a bus address from 1 to 32 and the bus speed.
- The communication table lists 2400 to 230400 baud (9600 default) with 1 stop bit on BACnet MS/TP; the menu page lists 1200 to 9600 b/s.
Watch out for
- Steam capacity limit (AV 4) is a fixed setting, not a control command.
- AV 6 is a temperature setpoint (25-55 °C) on the SB steam bath, not RH.
Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 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.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| BI | 0 | Contactor | Main contactor (steam production) | Read | 0=No production, 1=Production | |
| BI | 1 | High-level detection | High water level reached | Read | 0=Not reached, 1=Reached | |
| BI | 2 | High limit switch | High limit switch | Read | 0=Closed, 1=Opened | |
| BI | 3 | Fill valve | Fill valve | Read | 0=No filling, 1=Filling | |
| BI | 4 | Drain valve | Drain valve | Read | 0=No draining, 1=Draining | |
| BI | 5 | relay X10 (term. 3-4): Blower pack / remote ON/OFF, service, default | Relay X10 output (blower, remote on/off, service or fault) | Read | 0=Relay off, 1=Relay on | |
| BI | 6 | maintenance returns | Maintenance feedback | Read | 0=Off, 1=On | |
| BImin | 7 | Alarm returns | Alarm feedback | Read | 0=Off, 1=On | |
| BOmin | 0 | On/Off BMS command | Start/stop from the BMS | Write | 0=Off (stop unit), 1=On (start requested) | |
| BV | 2 | option 1 (with SB card 8 relays) | Option relay 1, SB 8-relay card | Write | 0=Off, 1=On | |
| BV | 3 | option 2 (with SB card 8 relays) | Option relay 2, SB 8-relay card | Write | 0=Off, 1=On | |
| AI | 0 | Type unit | Unit type code | Read | 1=Steam Bath, 2=ELMC, 3=CMC, 13=EHU 750 | |
| AI | 1 | Register version | Register map version | Read | ||
| AI | 2 | Current | Electrode current, value = 10 x A | A | Read | |
| AImin | 3 | Run status | Operating status | Read | 0=Idle, 1=Steam Gen, 2=End of season, 3=Failure, 4=Manual drain, 5=Maintenance | |
| AI | 4 | maintenance counter | Maintenance counter | h | Read | |
| AI | 5 | time | Run time | h | Read | |
| AI | 6 | time before end-of-season draining | Hours before end-of-season drain | h | Read | |
| AI | 7 | Control Signal value | Control signal, 10 x V or 10 x mA or % | Read | ||
| AI | 8 | Temperature (maintenance option or SB) | Water temperature (keep-warm option or steam bath) | °C | Read | |
| AImin | 9 | Error code | Active error code | Read | 0=Normal operating, 1=P1 Error, 2=P2 Error, 3=P3 Error, 4=P4 Error, 5=P5 Error, 6=P6 Error, 7=P7 Error, 8=P8 Error, 9=P9 Error, 10=First inspect., 11=Overdue service | |
| AI | 10 | type of water | Water type setting | Read | 1=Tap water, 2=Softened water, 3=Partial DI water, 4=DI water | |
| AI | 11 | type of control | Control signal type | Read | 20=On/Off, 21=Digital Ctrl, 22=Digital Sensor, 23=0-10V CTRL, 24=0-5V CTRL, 25=0-20mA CTRL, 26=0-10V Sensor, 27=0-5V Sensor, 28=4-20mA Sensor, 29=Temp Sensor | |
| AI | 13 | Application | Application value | % | Read | |
| AImin | 14 | steam production | Steam output, value = 10 x kg/h | kg/h | Read | |
| AV | 3 | End-of-season (EOS) | End-of-season drain delay, 1-168 h | h | Write | |
| AV | 4 | Steam capacity limit | Capacity limit, 20-100 % | % | Write | |
| AVmin | 5 | RH or demand value (digital or digital probe). | RH or demand from the BMS, 1-100 % | % | Write | |
| AVmin | 6 | RH set point | RH setpoint 1-100 %; steam bath 25-55 °C | % | Write | |
| AV | 9 | maintenance interval | Maintenance interval, hours/100, 1-200 | Write | ||
| AV | 10 | production adjustment | Production adjustment | Write | 1=Draining, 2=Evaporation | |
| AV | 11 | anti-foam drain time | Anti-foam drain time, 0-15 s | s | Write |
No points match these filters.
Object ID lookup: Devatec ElectroVap MC electrode steam humidifier point IDs by name
BI0ContactorBI1High-level detectionBI2High limit switchBI3Fill valveBI4Drain valveBI5relay X10 (term. 3-4): Blower pack / remote ON/OFF, service, defaultBI6maintenance returnsBI7Alarm returnsBO0On/Off BMS commandBV2option 1 (with SB card 8 relays)BV3option 2 (with SB card 8 relays)AI0Type unitAI1Register versionAI2CurrentAI3Run statusAI4maintenance counterAI5timeAI6time before end-of-season drainingAI7Control Signal valueAI8Temperature (maintenance option or SB)AI9Error codeAI10type of waterAI11type of controlAI13ApplicationAI14steam productionAV3End-of-season (EOS)AV4Steam capacity limitAV5RH or demand value (digital or digital probe).AV6RH set pointAV9maintenance intervalAV10production adjustmentAV11anti-foam drain time
Integration notes
- The manual's table has no read/write column; access is inferred from the Modbus register area (coils and holding registers writable).
- The description column is used as the object name. The English print labels the Analog Input class "Have" (a mistranslation); the hex IDs confirm Analog Input.
- Rows marked "Not used" (BV 1, AV 7, AV 8) are left out.
- Option relays 3 and 4 are printed as BV 1 and BV 2 with the same hex IDs as the BV 1 and BV 2 rows above them, so their real instances are unclear; they are left out.
- AI 12 is not printed. Current, steam production and the control signal are scaled by 10.
- BV 2 and BV 3 only apply with the SB 8-relay option card.
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 ElectroVap MC (ELMC) electrode steam humidifier (V3 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 Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller)
How many BACnet points does the Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller) have?
This list has 32 BACnet objects: 14 analog inputs, 7 analog values, 8 binary inputs, 1 binary output, 2 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller) BACnet points are writable?
10 of the 32 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. The source has no read/write column, so this is inferred from object type.
Where is the official Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller) BACnet documentation?
The source is ElectroVap ELMC Series Instruction & Operation Manual (DT_ELMC-V3-EN REV B.1), published free by Devatec at https://www.devatec.com/wp-content/uploads/2022/01/DT_ELMC-V3-EN_REV-B.1_L.pdf.
What are the minimum BACnet points to integrate the Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller)?
Start with BO 0 On/Off BMS command (Start/stop (1 = start requested)); AV 5 RH or demand value (digital or digital probe). (Demand or RH from the BMS, 1-100 %); AV 6 RH set point (Humidity setpoint, %RH); AI 3 Run status (Run status code); AI 14 steam production (Steam output, 10 x kg/h); BI 7 Alarm returns (Alarm feedback); AI 9 Error code (Active error code).
How do I enable BMS control of the Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller)?
BO 0 On/Off BMS command starts (1) or stops (0) the unit.
Can the BMS supply sensor values to the Devatec ElectroVap MC (ELMC) electrode steam humidifier (V3 controller)?
With the control signal type set to digital control in the humidifier menu, the BMS writes RH or demand (1-100 %) to AV 5.
How do I check these points on the real ElectroVap MC (ELMC) electrode steam humidifier (V3 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 Devatec BACnet points lists
Source: ElectroVap ELMC Series Instruction & Operation Manual · DT_ELMC-V3-EN REV B.1. Object names, instances and units are reproduced as published; descriptions are our own.