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Damper and valve actuator · BACnet points list
Belimo Air/Water Actuators (BACnet MS/TP) BACnet points list
Updated 6 November 2026
Belimo's air/water actuators with a communication interface can run on BACnet MS/TP. The BMS writes a % setpoint to AO 1, scaled between Min and Max, and reads position and status; one extra sensor input (active, passive temperature or switch) can be read over the bus. The setpoint can also come from a 0-10 V signal, chosen with SpSource (MV 122).
This page lists 20 BACnet objects for the Belimo Air/Water Actuators (BACnet MS/TP) — 10 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Belimo’s own free documentation, linked below.
- Manufacturer
- Belimo
- Model
- Air/Water Actuators (BACnet MS/TP)
- Equipment
- Damper and valve actuator
- Equipment type
- Valves & actuators
- BACnet objects
- 20 (10 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- 1
- Also known as
- Belimo air/water actuator, Belimo AirWater BACnet, ..M(C)24A, ..R24A, ..V(K)24A, ..F24A, ..RF24A
Reference only, provided as-is: verify against Belimo’s current documentation and the live device before use. Not official Belimo information. Terms of use.
BMS integration notes: Belimo Air/Water Actuators (BACnet MS/TP)
Set MV 122 SpSource to Bus and command AO 1 SpRel. Read AI 1 position and BI 101 summary status. If a bus watchdog is set in AV 130, keep writing AO 1 (or MO 1) within that time.
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 |
|---|---|---|---|
| AO 1 | SpRel | Actuator setpoint, % (between Min and Max) | Command |
| MV 122 | SpSource | Must be Bus for AO 1 to take effect | Write |
| AI 1 | RelPos | Position feedback | Read |
| BI 101 | SummaryStatus | Overall OK / not OK alarm | Read |
Enable & remote start
MV 122 SpSource selects the setpoint: Analog (1, default) follows the 0-10 V signal on wire 3; Bus (2) uses AO 1. MO 1 Override can force Open, Close, Min, Mid, Max or fast open/close.
Heartbeat & communication loss
AV 130 Bus Watchdog (0-3600 s, default 0 = off). When set, each write to AO 1 or MO 1 restarts the timer; on timeout the AO 1 priority array is cleared, the relinquish default applies, and MI 110 shows Bus Watchdog triggered. With SpSource = Analog only MO 1 writes are tracked.
Network setup
- MS/TP only: baud 9600, 19200, 38400 or 76800 (default 38400); address 0-127 (default 1).
- Device instance 0-4194302, default 1.
- Max 32 nodes without repeater; 120 ohm termination set with the configuration tool (BI 99 shows it).
- Quick addressing with the Address and Adaption buttons; configure with Belimo Assistant 2.
Watch out for
- Persistent writable objects are not meant to be written on a regular basis.
- Fast open / fast close overrides add mechanical wear; keep them for time-critical events such as frost protection.
- Max 6 active COV subscriptions, lifetime up to 8 hours.
Belimo Air/Water Actuators (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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | RelPos | Relative position | % | Read | |
| AI | 2 | AbsPos | Absolute position (degrees rotary, mm linear) | Read | ||
| AI | 6 | SpAnalog | Analog setpoint when SpSource is Analog | % | Read | |
| AI | 20 | Sens1Analog | Sensor 1 value when Sens1Type is Active (V, ohm, °C or °F) | Read | ||
| AOmin | 1 | SpRel | Bus setpoint, scaled between Min and Max | % | Command | |
| AV | 97 | Min | Minimum setpoint (at most Max - 30 %) | % | Write | |
| AV | 98 | Max | Maximum setpoint (at least Min + 30 %) | % | Write | |
| AV | 130 | Bus Watchdog | Bus watchdog timeout, 0 = off | s | Write | |
| AV | 131 | Fail-Safe Bridging Time | Bridging time on power failure (fail-safe models) | s | Write | |
| AV | 132 | Fail-Safe Position | Fail-safe position (fail-safe models) | % | Write | |
| BI | 20 | Sens1Switch | Sensor 1 as switch input | Read | Inactive, Active | |
| BI | 99 | BusTermination | 120 ohm bus termination enabled | Read | Inactive, Active | |
| BImin | 101 | SummaryStatus | Summary of MI 106 and MI 110 | Read | Inactive=OK, Active=Not OK | |
| MI | 100 | InternalActivity | Internal test or adaption running | Read | 1=None, 2=Test, 3=Adaption | |
| MI | 106 | StatusActuator | Actuator status | Read | 1=OK, 2=Actuator cannot move, 3=Gear train disengaged, 4=Mechanical travel increased | |
| MI | 110 | StatusDevice | Device status, incl. bus watchdog | Read | 1=OK, 2=Bus Watchdog triggered | |
| MO | 1 | Override | Override the setpoint with fixed positions | Command | 1=None, 2=Open, 3=Close, 4=Min_Vmin, 5=Mid_Vmid, 6=Max_Vmax, 7=Fast open, 8=Fast close | |
| MV | 120 | Command | Service command: adaption, test or status reset | Write | 1=None, 2=Adaption, 3=Test, 4=Reset | |
| MVmin | 122 | SpSource | Setpoint source: analog 0-10 V or bus AO 1 | Write | 1=Analog, 2=Bus | |
| MV | 220 | Sens1Type | Sensor 1 type | Write | 1=None, 2=Active / hybrid, 3=Passive_1K, 4=Passive_20K, 5=Switch, 6=PT1000_C, 7=NI1000_C, 8=NTC10K2_C, 9=PT1000_F, 10=NI1000_F, 11=NTC10K2_F |
No points match these filters.
Object ID lookup: Belimo Air/Water Actuators point IDs by name
Integration notes
- The document's PICS prints the model numbers as ..M(C)24A-MOD, ..R24A-MOD, ..V(K)24A-MOD, ..F24A-MOD and ..RF24A-MOD with application software 'Modbus Module V1.0'; check the actuator's own datasheet for the exact BACnet part number.
- AbsPos reads in degrees on rotary actuators and mm on linear ones.
- Sens1Analog has no fixed unit: V, ohm, °C or °F depending on Sens1Type.
- AV 131 / AV 132 only apply to electronic fail-safe actuators.
- StatusActuator states 2 and 4 stay set until reset with Command (MV 120) = Reset.
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 Air/Water Actuators (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 Belimo Air/Water Actuators (BACnet MS/TP)
How many BACnet points does the Belimo Air/Water Actuators (BACnet MS/TP) have?
This list has 20 BACnet objects: 4 analog inputs, 1 analog output, 5 analog values, 3 binary inputs, 3 multi-state inputs, 1 multi-state output, 3 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Belimo Air/Water Actuators (BACnet MS/TP) BACnet points are writable?
10 of the 20 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 Belimo Air/Water Actuators (BACnet MS/TP) BACnet documentation?
The source is BACnet interface description, Air/water actuators (V3.08), revision 2026-05, published free by Belimo at https://www.belimo.com/mam/general-documents/system_integration/BACnet/belimo_BACnet_Interface-description_AirWater_V3_8_en-gb.pdf.
What are the minimum BACnet points to integrate the Belimo Air/Water Actuators (BACnet MS/TP)?
Start with AO 1 SpRel (Actuator setpoint, % (between Min and Max)); MV 122 SpSource (Must be Bus for AO 1 to take effect); AI 1 RelPos (Position feedback); BI 101 SummaryStatus (Overall OK / not OK alarm).
How do I enable BMS control of the Belimo Air/Water Actuators (BACnet MS/TP)?
MV 122 SpSource selects the setpoint: Analog (1, default) follows the 0-10 V signal on wire 3; Bus (2) uses AO 1. MO 1 Override can force Open, Close, Min, Mid, Max or fast open/close.
Does the Belimo Air/Water Actuators (BACnet MS/TP) need a BACnet heartbeat or have a communication timeout?
AV 130 Bus Watchdog (0-3600 s, default 0 = off). When set, each write to AO 1 or MO 1 restarts the timer; on timeout the AO 1 priority array is cleared, the relinquish default applies, and MI 110 shows Bus Watchdog triggered. With SpSource = Analog only MO 1 writes are tracked.
How do I check these points on the real Air/Water Actuators (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 Belimo BACnet points lists
- Pressure-independent control valve
Belimo 2-way EPIV V4
Belimo 2-way electronic pressure-independent valves (EPIV) version 4.2, DN 15 to 50, BACnet models EP..R2+(K)BAC.
Also known as: EPIV, EP..R2+BAC, EP..R2+KBAC, Electronic Pressure Independent Valve, 2-way EPIV DN 15-50 - Ultrasonic liquid flow sensor
Belimo 22PF Flow Sensor
Belimo 22PF-.. ultrasonic flow sensors for water and glycol pipes, interface version 4.3.0.
Also known as: 22PF, 22PF-.., Belimo ultrasonic flow sensor, Flow Sensor 22PF - 6-way pressure-independent control valve
Belimo 6-way EPIV
Belimo 6-way EPIV (EP..R-R6+BAC) used to switch and control a single coil between heating and cooling sequences.
Also known as: EP..R-R6+BAC, 6-way EPIV, 6-way characterised control valve, Belimo 6-way valve - Duct / outdoor sensors (temperature, humidity, CO2, VOC, differential pressure)
Belimo Duct and Pipe Sensors (22DTH, 22UTH, 22DTM, 22ADP) BACnet
Belimo BACnet MS/TP sensors: 22DTH duct temperature/humidity, 22UTH outdoor temperature/humidity, 22DTM duct CO2/VOC and 22ADP differential pressure/airflow sensors.
Also known as: 22DTH-..6.., 22UTH-..60X, 22DTM-..6, 22ADP-..6.., 22DTH-16M, 22DTH-56M, 22UTH-160X, 22UTH-560X, 22DTM-16, 22DTM-56, 22ADP-164, 22ADP-164L, 22ADP-56Q, 22ADP-56QB, 22ADP-564L, 22ADP-566L - Pressure-independent control valve with energy meter
Belimo Energy Valve V3
Belimo Energy Valve generation 3 (EV..R+(K)BAC, EV..R3+BAC, EV..F+(K)BAC), the installed base before Energy Valve V4.
Also known as: Energy Valve, EV..R+BAC, EV..R+KBAC, EV..R3+BAC, EV..F+BAC, EV..F+KBAC, Belimo Energy Valve 3 - Pressure-independent control valve with energy meter
Belimo Energy Valve V4
Belimo Energy Valve version 4, DN 15 to 50, BACnet models EV..R2+(K)BAC, EV..R2+MID and EV..R3+BAC.
Also known as: Energy Valve, EV..R2+BAC, EV..R2+KBAC, EV..R2+MID, EV..R3+BAC, Belimo Energy Valve 4 - Fire and smoke damper actuator test module
Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module
Belimo FSKN120-BAC and FSKN24-BAC remote test modules for spring-return fire and combination fire/smoke damper actuators (FSTF, FSLF, FSNF, FSAFB, FSAF*A) in containment applications.
Also known as: FSKN120-BAC, FSKN24-BAC, FSKN, Belimo FSKN BACnet - Valve actuator (Ethernet, IoT)
Belimo IoT Valve Actuators VxM24A-LP1 / VxR24A-LP1 (BACnet IP)
Belimo IoT product range valve actuators VLM/VLR, VNM/VNR, VSM/VSR and VGM/VGR 24A-LP1 with Ethernet and BACnet IP.
Also known as: VLM24A-LP1, VLR24A-LP1, VNM24A-LP1, VNR24A-LP1, VSM24A-LP1, VSR24A-LP1, VGM24A-LP1, VGR24A-LP1, Belimo IoT Product Range - Butterfly valve actuator
Belimo JR..A-BAC-.. Butterfly Valve Actuator (BACnet MS/TP)
Belimo JR rotary actuators for butterfly valves in the BACnet MS/TP version (JR..A-BAC-..).
Also known as: JR actuator, JR..A-BAC-.., Belimo JR BACnet, JR/QR - Butterfly valve actuator
Belimo PR..-BAC-.. Butterfly Valve Actuator (BACnet MS/TP)
Belimo PR rotary actuators for butterfly valves in the BACnet MS/TP version (PR..-BAC-..).
Also known as: PR..-BAC-.., Belimo PR actuator, PR BACnet - Room sensor / operating unit
Belimo Room Operating Unit 22RT-5U00
Belimo 22RT...-5U00... room operating units with virtual or ePaper touch display, measuring temperature, humidity and CO2.
Also known as: 22RT, 22RT…-5U00…, Room Operating Unit, ROU, 22RTM-5U00, Belimo room sensor BACnet - Thermal (BTU) energy meter
Belimo Thermal Energy Meter V4
Belimo Thermal Energy Meters version 4, DN 15 to 50 (22PE..-1U.., including MID-certified 22PEM models).
Also known as: TEM, Thermal Energy Meter, 22PE-1U, 22PEM-1UC, 22PE…-1U.., Belimo energy meter - VAV compact controller (actuator with flow sensor)
Belimo VAV-Compact
Belimo VAV-Compact volumetric flow controllers with the BACnet/Modbus interface (..MV-D3-MOD and ..HV24A-MOD).
Also known as: VAV-Compact MOD, ..MV-D3-MOD, ..HV24A-MOD, LMV-D3-MOD, NMV-D3-MOD, SMV-D3-MOD, LHV24A-MOD - VAV / CAV / pressure controller
Belimo VAV-Universal VRU
Belimo VAV-Universal controllers VRU-D3-BAC, VRU-M1-BAC and VRU-M1R-BAC used for VAV/CAV airflow, duct pressure and room pressure control.
Also known as: VAV-Universal, VRU-D3-BAC, VRU-M1-BAC, VRU-M1R-BAC, VRU-..-BAC - VAV zone controller / actuator
Belimo ZoneEase VAV zone control actuator (BACnet MS/TP)
Belimo ZoneEase VAV actuators LMV-BAC-.. and NMV-BAC-.. with the built-in zone control applications, application software ZoneEase 1.7.
Also known as: ZoneEase VAV, LMV-BAC-.., NMV-BAC-.., Belimo ZoneEase
Source: BACnet interface description, Air/water actuators · V3.08 · rev. 2026-05. Object names, instances and units are reproduced as published; descriptions are our own.