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VAV room airflow controller · BACnet points list

TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) BACnet points list

Updated 11 November 2026

Short answer

TROX UNIVERSAL lab and room airflow controllers connect to BACnet MS/TP (or Modbus RTU) through the EM-BAC-MOD-01 expansion module. This is TROX's EDE file for the room airflow controller (order code RS / RE): 42 value objects (16 AV, 25 BV, 1 MV). The MS/TP module has a much smaller object set than the EM-IP (BACnet IP) module, and some instance numbers differ.

This page lists 42 BACnet objects for the TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) — 8 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from TROX’s own free documentation, linked below.

Manufacturer
TROX
Model
TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP)
Equipment
VAV room airflow controller
Equipment type
VAV boxes & fan coils
BACnet objects
42 (8 writable)
Transport
BACnet MS/TP
Firmware
EM-BAC-MOD EDE V4.1
Default device instance
32900 + network address
Also known as
TROX UNIVERSAL EM-BAC-MOD-01, EM-BAC-MOD-01, TROX UNIVERSAL, order code RS / RE
Source document
EM-BAC-MOD EDE files V4.1 (EM-BAC-MOD_EDE-complete-V4_1) · TCU3_EDE_files_U_RR_V4_1
Download CSV 42 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 TROX’s current documentation and the live device before use. Not official TROX information. Terms of use.

BMS integration notes: TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP)

Integration in brief

This application takes no mode preset over BACnet; the BMS mainly reads airflow, damper and alarm values. Read MV 4 RoomModeAct, AV 2 VolflowAct, AV 3 VolTotalExh, BV 1 LocalAlarm.

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 4RoomModeActCurrent operating mode of the roomRead
AV 2VolflowActMeasured airflow, l/sRead
AV 10DampPosDamper position, %Read
BV 1LocalAlarmAlarm on this controllerRead

Sensors & values from the BMS

AV 22 VolflowExh and AV 23 VolflowSup let the BMS feed extract and supply airflows of other equipment into the room balance.

Network setup

Watch out for

TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) 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.

42 of 42 shown
Type
AnalogBinaryMulti-state
Access
Show
TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) BACnet Points List
DescriptionStates
MVmin4RoomModeActroom mode, current stateRead1=No preset, 2=Standard Mode, 3=Low Mode, 4=High Mode, 5=Shut off Mode, 6=Open Mode
AV1VolflowSetvolume flow, set valuel/sRead
AVmin2VolflowActvolume flow, current valuel/sRead
AV3VolTotalExhvolume flow, total extract air valuel/sRead
AV4VolTotalSupvolume flow, total supply air valuel/sRead
AVmin10DampPosdamper, current position of the device%Read
AV13DampPosMax_REdamper, max. position of all room extractors%Read
AV14DampPosMin_REdamper, min. position of all room extractors%Read
AV15DampPosMax_TEdamper, max. position of all extractors (FH + EC + RE)%Read
AV16DampPosMin_TEdamper, min. position of all extractors (FH + EC + RE)%Read
AV17DampPosMax_RSdamper, max. position of all room suppliers%Read
AV18DampPosMin_RSdamper, min. position of all room suppliers%Read
AV21SystemDevicestotal number of system devicesRead
AV22VolflowExhextract airflow input from an external devicel/sWrite
AV23VolflowSupsupply airflow input from an external devicel/sWrite
AV30DampPosMax_TSdamper, max. position of all suppliers (SC + RS)%Read
AV31DampPosMin_TSdamper, min. position of all suppliers (SC + RS)%Read
BVmin1LocalAlarmlocal alarmRead0=Normal, 1=Alarm
BV6DI1digital input 1Read0=Off, 1=On
BV7DI2digital input 2Read0=Off, 1=On
BV8DI3digital input 3Read0=Off, 1=On
BV9DI4digital input 4Read0=Off, 1=On
BV10DI5digital input 5Read0=Off, 1=On
BV11DI6digital input 6Read0=Off, 1=On
BV12DO1digital output 1Read0=Off, 1=On
BV13DO2digital output 2Read0=Off, 1=On
BV14DO3digital output 3Read0=Off, 1=On
BV15DO4digital output 4Read0=Off, 1=On
BV16DO5digital output 5Read0=Off, 1=On
BV17DO6digital output 6Read0=Off, 1=On
BV19DO1_Setdigital output 1 setWrite0=Inactive, 1=Active
BV20DO2_Setdigital output 2 setWrite0=Inactive, 1=Active
BV21DO3_Setdigital output 3 setWrite0=Inactive, 1=Active
BV22DO4_Setdigital output 4 setWrite0=Inactive, 1=Active
BV23DO5_Setdigital output 5 setWrite0=Inactive, 1=Active
BV24DO6_Setdigital output 6 setWrite0=Inactive, 1=Active
BV25DO1_SetByLocaldigital output 1 feedbackRead0=External, 1=Local
BV26DO2_SetByLocaldigital output 2 feedbackRead0=External, 1=Local
BV27DO3_SetByLocaldigital output 3 feedbackRead0=External, 1=Local
BV28DO4_SetByLocaldigital output 4 feedbackRead0=External, 1=Local
BV29DO5_SetByLocaldigital output 5 feedbackRead0=External, 1=Local
BV30DO6_SetByLocaldigital output 6 feedbackRead0=External, 1=Local
Object ID lookup: TROX UNIVERSAL Room EM-BAC-MOD-01 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 TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) 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 TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP)

How many BACnet points does the TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) have?

This list has 42 BACnet objects: 16 analog values, 25 binary values, 1 multi-state value. The exact set on a given unit depends on its firmware, installed options and configuration.

Which TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) BACnet points are writable?

8 of the 42 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 TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP) BACnet documentation?

The source is EM-BAC-MOD EDE files V4.1 (EM-BAC-MOD_EDE-complete-V4_1) (TCU3_EDE_files_U_RR_V4_1), published free by TROX at https://www.trox.de/en/downloads/42fe282430305ce7/EM-BAC-MOD_EDE-complete-V4_1.zip.

What are the minimum BACnet points to integrate the TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP)?

Start with MV 4 RoomModeAct (Current operating mode of the room); AV 2 VolflowAct (Measured airflow, l/s); AV 10 DampPos (Damper position, %); BV 1 LocalAlarm (Alarm on this controller).

Can the BMS supply sensor values to the TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP)?

AV 22 VolflowExh and AV 23 VolflowSup let the BMS feed extract and supply airflows of other equipment into the room balance.

How do I check these points on the real TROX UNIVERSAL room airflow controller (EM-BAC-MOD-01, BACnet MS/TP)?

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 TROX BACnet points lists

Source: EM-BAC-MOD EDE files V4.1 (EM-BAC-MOD_EDE-complete-V4_1) · TCU3_EDE_files_U_RR_V4_1. Object names, instances and units are reproduced as published; descriptions are our own.