Easy BACnet- Home
- BACnet points lists
- DriSteem
- TRI2 BACnet humidistat
Humidifier controller / humidistat (BACnet MS/TP) · BACnet points list
DriSteem TRI2 BACnet humidistat BACnet points list
Updated 4 November 2026
The TRI2 is DriSteem's touchscreen humidistat with BACnet MS/TP over RS485. It is built on a general-purpose X2 controller; the manual lists only the objects DriSteem uses (39 here). The BMS can read the humidity inputs and alarms, switch the unit on or off, write the control set point, or take direct control of the dehumidifier output.
This page lists 39 BACnet objects for the DriSteem TRI2 BACnet humidistat — 21 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from DriSteem’s own free documentation, linked below.
- Manufacturer
- DriSteem
- Model
- TRI2 BACnet humidistat
- Equipment
- Humidifier controller / humidistat (BACnet MS/TP)
- Equipment type
- Humidifiers
- BACnet objects
- 39 (21 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Also known as
- TRI2, DriSteem TRI2, TCI humidistat, DriSteem BACnet humidistat, X2 controller, AEX-BAC
Reference only, provided as-is: verify against DriSteem’s current documentation and the live device before use. Not official DriSteem information. Terms of use.
BMS integration notes: DriSteem TRI2 BACnet humidistat
By default the humidistat runs its own control loop: the BMS can switch it on or off with BV 0 and write the set point on AV 211, and read humidity on AI 102 (room) or AI 106 (duct). For BAS control of a dehumidifier, set digital-output parameter 1d 01 to 6 (manual control); the BMS then drives the dehumidifier with BV 412 and the humidistat loop is disabled.
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 |
|---|---|---|---|
| BV 0 | OpStOo | On/off; inactive turns the unit off | Write |
| AV 211 | LP-01-SSP | Humidity set point for the humidistat loop | Write |
| BV 412 | DO-01-BIN-OV | Dehumidifier on/off from BAS (1d 01 = 6) | Write |
| AI 102 | UI-02 | Room humidity (room models) | Read |
| AI 106 | UI-06 | Duct humidity (duct models) | Read |
| AV 213 | LP-01-PROP | Loop output to the humidifier | Read |
| BV 411 | DO-01-BIN | Dehumidifier output status | Read |
| AI 104 | UI-04 | Dehumidifier alarm input | Read |
| MV 602 | AL-02 | Duct high limit or dehumidifier error alarm | Write |
Enable & remote start
BV 0 (operation state) acts like the power button: inactive turns the controlled unit off, active puts it under the humidistat loop. To let the BAS switch a dehumidifier directly, change parameter 1d 01 from 1 (control loop) to 6 (manual control) and write BV 412.
Sensors & values from the BMS
Humidity comes from the internal sensor (room models) or a remote 0-10 V / 4-20 mA sensor on universal input 6 (duct models); the manual does not describe writing humidity from the BMS.
Network setup
- BACnet MS/TP settings are the CO parameters (login code 241): CO 03 MAC address (unique, 1-127), CO 04 baud rate (0 = auto-detect, up to 115200), CO 05 highest master.
- The device object ID is built from CO 06-CO 09; CO 15 controls auto-increment and auto-build of the device object name (default name AEX-BAC).
Watch out for
- In humidistat control mode BV 412 cannot be used and the BMS cannot force the dehumidifier on when humidity is below the set point.
- Alarm MVs accept a write only to clear them to 'Not Active' after they reach 'Need confirmation'.
DriSteem TRI2 BACnet humidistat 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AV | 0 | #CtrLp | Number of control loops | Read | ||
| AV | 2 | #uln | Number of universal inputs | Read | ||
| AV | 4 | #BinOut | Number of binary outputs (not used by humidifiers) | Read | ||
| AV | 5 | #aOut | Number of analog outputs (not used by dehumidifiers) | Read | ||
| AV | 8 | #Alarm | Number of alarms | Read | ||
| BVmin | 0 | OpStOo | Operation state on/off | Write | Inactive, Active | |
| BV | 4 | AccSp | Enable access to set points | Write | ||
| MV | 2 | Degree | Display units | Write | 1=Celsius, 2=Fahrenheit | |
| MV | 3 | OpStOPMS | Master/slave mode | Write | Master, Slave | |
| MV | 4 | OpStWink | Wink function | Write | WinkON, WinkOFF | |
| AI | 101 | UI-01 | Universal input 1, temperature | Read | ||
| AV | 101 | UI-01-OS | Universal input 1 offset (calibration), temperature | Write | ||
| AImin | 102 | UI-02 | Universal input 2, internal humidity (room models) | Read | ||
| AV | 102 | UI-02-OS | Universal input 2 offset, internal humidity (room models) | Write | ||
| AImin | 104 | UI-04 | Universal input 4 (dehumidifier alarm input) | Read | ||
| AV | 104 | UI-04-OS | Universal input 4 offset | Write | ||
| AI | 105 | UI-05 | Universal input 5 (not used for dehumidifiers) | Read | ||
| AV | 105 | UI-05-OS | Universal input 5 offset (not used for dehumidifiers) | Write | ||
| AImin | 106 | UI-06 | Universal input 6, remote humidity (duct models) | Read | ||
| AV | 106 | UI-06-OS | Universal input 6 offset, remote humidity (duct models) | Write | ||
| MV | 601 | AL-01 | Alarm 1: humidity out of range (duct models) | Write | Not Active, Active, Need confirmation | |
| MVmin | 602 | AL-02 | Alarm 2: duct high limit or dehumidifier errors | Write | Not Active, Active, Need confirmation | |
| MV | 603 | AL-03 | Alarm 3: air flow or temperature switch (humidifiers) | Write | Not Active, Active, Need confirmation | |
| MV | 604 | AL-04 | Alarm 4 | Write | Not Active, Active, Need confirmation | |
| MV | 605 | AL-05 | Alarm 5 | Write | Not Active, Active, Need confirmation | |
| MV | 606 | AL-06 | Alarm 6 | Write | Not Active, Active, Need confirmation | |
| MV | 607 | AL-07 | Alarm 7 | Write | Not Active, Active, Need confirmation | |
| MV | 608 | AL-08 | Alarm 8 | Write | Not Active, Active, Need confirmation | |
| AVmin | 211 | LP-01-SSP | Control loop 1 saved set point | Write | ||
| AVmin | 213 | LP-01-PROP | Control loop 1 proportional output | Read | ||
| MV | 212 | LP-01-DO | Control loop 1 binary output stage | Read | Stage OFF, Stage 1, Stage 2, ... | |
| MV | 311 | AO-01-ST | Analog output 1 state (humidifiers only) | Read | ||
| AV | 311 | AO-01-VAL | Analog output 1 value (humidifiers only) | Read | ||
| AV | 312 | AO-01-OV | Analog output 1 override value (humidifiers only) | Write | ||
| BVmin | 411 | DO-01-BIN | Digital output 1 state (dehumidifiers only) | Read | ||
| BVmin | 412 | DO-01-BIN-OV | Digital output 1 override value (BAS control) | Write | ||
| AV | 511 | DO-01-RT | Digital output 1 run time totalizer | Read | ||
| BV | 511 | DO-01-ALA | Digital output 1 run time limit exceeded | Read | ||
| MV | 411 | DO-01-ST | Digital output 1 state | Read | NORMAL, OVERRIDE |
No points match these filters.
Object ID lookup: DriSteem TRI2 BACnet humidistat point IDs by name
AV0#CtrLpAV2#ulnAV4#BinOutAV5#aOutAV8#AlarmBV0OpStOoBV4AccSpMV2DegreeMV3OpStOPMSMV4OpStWinkAI101UI-01AV101UI-01-OSAI102UI-02AV102UI-02-OSAI104UI-04AV104UI-04-OSAI105UI-05AV105UI-05-OSAI106UI-06AV106UI-06-OSMV601AL-01MV602AL-02MV603AL-03MV604AL-04MV605AL-05MV606AL-06MV607AL-07MV608AL-08AV211LP-01-SSPAV213LP-01-PROPMV212LP-01-DOMV311AO-01-STAV311AO-01-VALAV312AO-01-OVBV411DO-01-BINBV412DO-01-BIN-OVAV511DO-01-RTBV511DO-01-ALAMV411DO-01-ST
Integration notes
- Source: Tables 20-1 and 21-1 'Description of available objects', manual pages 20-21. The model TCI in the same manual has no BACnet.
- Objects not used by DriSteem (AV 1/3/6/7/9-11, MV 0/1/5/211, BV 1-3/5-7, AI/AV 103/107/108, loops 2-4, AO 2-3, DO 2-6) are left out, as in the manual.
- Room models use the internal humidity input (AI 102); duct models use the remote humidity input (AI 106). Analog output objects apply to humidifiers, digital output objects to dehumidifiers.
- Alarm MVs can only be written back to 'Not Active' while their state is 'Not Active, Need confirmation'.
- The table's Range/Type column lists sizes (8bit, 16bytes), not engineering units, so no units are given here.
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 TRI2 BACnet humidistat 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 DriSteem TRI2 BACnet humidistat
How many BACnet points does the DriSteem TRI2 BACnet humidistat have?
This list has 39 BACnet objects: 5 analog inputs, 15 analog values, 5 binary values, 14 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which DriSteem TRI2 BACnet humidistat BACnet points are writable?
21 of the 39 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 DriSteem TRI2 BACnet humidistat BACnet documentation?
The source is DriSteem Humidistats Model TCI-W11-U-H, TCI-W11-U, Model TRI2 with BACnet Humidistat - Installation, Operation, and Maintenance Manual (TCI-IOM-EN-REVF-0125), revision 2025-01, published free by DriSteem at https://d2tsmyh31fn7w8.cloudfront.net/public-documents/docs/iom/humidistat/TCI-IOM-EN.pdf.
What are the minimum BACnet points to integrate the DriSteem TRI2 BACnet humidistat?
Start with BV 0 OpStOo (On/off; inactive turns the unit off); AV 211 LP-01-SSP (Humidity set point for the humidistat loop); BV 412 DO-01-BIN-OV (Dehumidifier on/off from BAS (1d 01 = 6)); AI 102 UI-02 (Room humidity (room models)); AI 106 UI-06 (Duct humidity (duct models)); AV 213 LP-01-PROP (Loop output to the humidifier); BV 411 DO-01-BIN (Dehumidifier output status); AI 104 UI-04 (Dehumidifier alarm input); MV 602 AL-02 (Duct high limit or dehumidifier error alarm).
How do I enable BMS control of the DriSteem TRI2 BACnet humidistat?
BV 0 (operation state) acts like the power button: inactive turns the controlled unit off, active puts it under the humidistat loop. To let the BAS switch a dehumidifier directly, change parameter 1d 01 from 1 (control loop) to 6 (manual control) and write BV 412.
Can the BMS supply sensor values to the DriSteem TRI2 BACnet humidistat?
Humidity comes from the internal sensor (room models) or a remote 0-10 V / 4-20 mA sensor on universal input 6 (duct models); the manual does not describe writing humidity from the BMS.
How do I check these points on the real TRI2 BACnet humidistat?
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 DriSteem BACnet points lists
Source: DriSteem Humidistats Model TCI-W11-U-H, TCI-W11-U, Model TRI2 with BACnet Humidistat - Installation, Operation, and Maintenance Manual · TCI-IOM-EN-REVF-0125 · rev. 2025-01. Object names, instances and units are reproduced as published; descriptions are our own.