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Fire / smoke damper controller with airflow measurement · BACnet points list
FläktGroup OPTIVENT UltraSafe USFA control unit BACnet points list
Updated 12 November 2026
The UltraSafe USFA control unit runs a fire/smoke damper with an ultrasonic airflow sensor and an optional duct smoke detector. Its BACnet objects report damper position, current and test results, airflow, temperature and smoke detector values, accept a flow setpoint, manual override, damper test start, external alarm and interlock commands and an alarm reset, and include status bitstrings, trend logs, a PI loop and notification classes.
This page lists 74 BACnet objects for the FläktGroup OPTIVENT UltraSafe USFA control unit — 24 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from FläktGroup’s own free documentation, linked below.
- Manufacturer
- FläktGroup
- Model
- OPTIVENT UltraSafe USFA control unit
- Equipment
- Fire / smoke damper controller with airflow measurement
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 74 (24 writable)
- Transport
- —
- Firmware
- Not stated
- Also known as
- UltraSafe USFA, USFA, OPTIVENT UltraSafe, Ultrasafe, DC_10786GB, Flakt UltraSafe BACnet
Reference only, provided as-is: verify against FläktGroup’s current documentation and the live device before use. Not official FläktGroup information. Terms of use.
BMS integration notes: FläktGroup OPTIVENT UltraSafe USFA control unit
Read the machine state, damper position, airflow and the fire, fault and service alarm bits. If the BMS sets airflow, set BV 8 to Bus and write AV 2; BV 2 starts a damper test and BV 1 resets alarms.
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 |
|---|---|---|---|
| AV 2 | Volume flow setpoint | Relative airflow setpoint, % | Write |
| BV 8 | Air flow setpoint source | Active = Bus: BMS supplies the flow setpoint | Write |
| BV 2 | Damper test | Start a damper test | Write |
| BV 1 | Alarm & Event reset | Reset alarms and events | Write |
| MI 1 | Machine state | Unit state (normal, damper test, fault, interlock) | Read |
| AI 11 | Damper position | Damper position, % | Read |
| AI 23 | Volume flow relative | Relative airflow, % | Read |
| MI 2 | Smoke detector state | Smoke detector state incl. fire alarm | Read |
| BI 4 | Damper failure | Damper failure | Read |
| BI 1 | Service alarm | Service alarm active | Read |
Sensors & values from the BMS
BV 8 Air flow setpoint source selects Analog (analog input 1) or Bus; on Bus the BMS writes AV 2 Volume flow setpoint.
Watch out for
- BV 3 External Alarm and BV 4 External Interlock act on the damper; map them only if the BMS is meant to drive fire/interlock functions.
FläktGroup OPTIVENT UltraSafe USFA control unit 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 | |||||
|---|---|---|---|---|---|---|
| AI | 1 | Air duct size | Nominal duct size, 0-315 | Read | ||
| AI | 2 | Air duct size effective | Effective duct size, 0-315 | Read | ||
| AI | 3 | Analog output 1 | Analog output 1 value, 0-10.00 | Read | ||
| AI | 4 | Analog output 2 | Analog output 2 value, 0-10.00 | Read | ||
| AI | 5 | Damper current | Damper current, 0-2500 | Read | ||
| AI | 6 | Damper current open AVG | Average opening current on last damper test | Read | ||
| AI | 8 | Damper current open maximum | Peak opening current on last damper test | Read | ||
| AI | 10 | Damper driving signal | Actuator control voltage, 0-10.00 (close <6 V, open >6 V) | Read | ||
| AImin | 11 | Damper position | Relative damper position, 0.1-100.0 | Read | ||
| AI | 12 | Damper time close | Closing time on last damper test | Read | ||
| AI | 14 | Damper time open | Opening time on last damper test | Read | ||
| AI | 16 | Damper voltage | Damper position feedback signal, 0-10000 | Read | ||
| AI | 17 | Smoke detector current | Smoke detector current, 0-520.0 | Read | ||
| AI | 18 | Smoke detector voltage | Smoke detector voltage, 0-10000 | Read | ||
| AI | 19 | Temperature | Air temperature, -35.0 to 70.0 | Read | ||
| AI | 22 | Volume flow absolute | Absolute air volume flow | Read | ||
| AImin | 23 | Volume flow relative | Relative air volume flow, 0.1-100.0 | Read | ||
| AI | 24 | Setpoint via analog input 1 | Analog input 1 value, 0-10000 | Read | ||
| AI | 25 | PI control active value | PI controller output, relative | Read | ||
| AI | 26 | PI control active setpoint | PI controller relative flow setpoint | Read | ||
| AV | 1 | Analog output 2 override | Output 2 value when its function is Not used | Write | ||
| AVmin | 2 | Volume flow setpoint | Relative air volume flow setpoint, 0.1-100.0 | Write | ||
| AV | 7 | Damper min. driving signal | Damper minimum control voltage | Write | ||
| AV | 8 | Damper close timeout | Damper closing timeout | Write | ||
| AV | 9 | Damper open timeout | Damper opening timeout | Write | ||
| AV | 17 | Smoke detector fire threshold | Smoke detector fire alarm threshold | Write | ||
| AV | 18 | Smoke detector service threshold | Service alarm threshold (Custom detector type) | Write | ||
| AV | 21 | Volume flow attenuation | Flow monitoring value filtering | Write | ||
| AV | 22 | Volume flow between | Intermediate air volume flow | Write | ||
| AV | 23 | Volume flow maximum | Maximum air volume flow | Write | ||
| AV | 24 | Volume flow minimum | Minimum air volume flow | Write | ||
| AV | 25 | Volume flow nominal | Nominal air volume flow | Read | ||
| BImin | 1 | Service alarm | Service alarm | Read | Inactive=inactive; Active=active | |
| BI | 2 | Damper test active | Damper test running | Read | Inactive=inactive; Active=active | |
| BI | 3 | Damper test failure | Damper test failed | Read | Inactive=inactive; Active=active | |
| BImin | 4 | Damper failure | Damper failure | Read | Inactive=inactive; Active=active | |
| BVmin | 1 | Alarm & Event reset | Resets alarms and events | Write | Inactive=inactive; Active=active | |
| BVmin | 2 | Damper test | Starts a damper test | Write | Inactive=inactive; Active=start | |
| BV | 3 | External Alarm | External alarm trigger | Write | Inactive=inactive; Active=active | |
| BV | 4 | External Interlock | External interlock trigger | Write | Inactive=inactive; Active=active | |
| BV | 5 | UltraSonic zero-calibration | Starts ultrasonic zero calibration | Write | Inactive=inactive; Active=start | |
| BV | 6 | UltraSonic factory-reset | Starts ultrasonic sensor factory reset | Write | Inactive=inactive; Active=reset | |
| BV | 7 | External fire damper control system | An external fire control system is used | Write | Inactive=inactive; Active=active | |
| BVmin | 8 | Air flow setpoint source | Flow setpoint source | Write | Inactive=Analog; Active=Bus | |
| BV | 17 | Smoke detector | Smoke detector activation | Write | Inactive=enable; Active=disable | |
| BV | 18 | Smoke detector source | Smoke detector signal type | Write | Inactive=voltage; Active=current | |
| Other | 0 | Digital input states | BitString Value: Digital input states (bits DI 1-3) | Read | ||
| Other | 1 | Digital output states | BitString Value: Digital output states (bit field) | Read | ||
| Other | 2 | UltraSonic states | BitString Value: Ultrasonic sensor state bits | Read | ||
| Other | 3 | Event states | BitString Value: Unit event bits (32) | Read | ||
| Other | 4 | Fire alarm states | BitString Value: Fire signal source bits: bus, DI, smoke detector, motor fuse | Read | ||
| Other | 5 | Fault states | BitString Value: Fault bits | Read | ||
| Other | 6 | Service alarm states | BitString Value: Service alarm bits | Read | ||
| Other | 7 | Interlock states | BitString Value: Interlock source bits: DI, bus | Read | ||
| Other | 8 | Damper test start condition | BitString Value: Damper test trigger source bits | Read | ||
| MImin | 1 | Machine state | Unit operating state | Read | 1=Initialization; 2=Waiting for zero-calibration; 3=Zero-calibration active; 4=Normal operation; 5=Damper test initial opening; 6=Damper test closing by spring-force; 7=Damper test final opening; 8=Fault; 9=Interlock | |
| MImin | 2 | Smoke detector state | Smoke detector state | Read | 1=normal operation; 2=not configured; 3=service alarm; 4=fire alarm; 5=short circuit; 6=open loop | |
| MI | 3 | UltraSonic calibration | Sensor calibration status | Read | 1=inactive; 2=sensor need calibration; 3=calibration active | |
| MV | 1 | Override control | Manual damper override | Write | 1=No override control; 2=Open; 3=Close; 4=Vmin; 5=Vbtw; 6=Vmax | |
| MV | 4 | Damper test result | Result of the last damper test | Write | 1=Not performed; 2=Successful; 3=Open limit switch failure (initialization); 4=Closed limit switch failure; 5=Open limit switch failure; 6=Open & closed limit switch failure; 7=Damper test interrupted; 8=Damper test in progress | |
| IV | 1 | UltraSonic version major | Ultrasonic sensor firmware, major | Read | ||
| IV | 2 | UltraSonic version minor | Ultrasonic sensor firmware, minor | Read | ||
| TL | 1 | Damper time close log | Trend log: Closing time after each successful test | Read | ||
| TL | 2 | Damper time open log | Trend log: Opening time after each successful test | Read | ||
| TL | 3 | Damper current open AVG log | Trend log: Average opening current after each successful test | Read | ||
| TL | 4 | Damper current open maximum log | Trend log: Maximum opening current after each successful test | Read | ||
| TL | 5 | Volume flow setpoint log | Trend log: Volume flow setpoint | Read | ||
| TL | 6 | Volume flow setpoint via AI 1 log | Trend log: Flow setpoint from analog input 1 | Read | ||
| LO | 0 | Damper PI control | Damper PI control loop | Write | ||
| NC | 10 | NC-10 - Danger notification (Life Safety) | Danger to life | Read | ||
| NC | 30 | NC-30 - Alarm tripping notification | System failure / immediate attention | Read | ||
| NC | 50 | NC-50 - Maintenance notification | Maintenance indication | Read | ||
| NC | 80 | NC-80 - Operating notification | Operating notifications | Read | ||
| NC | 90 | NC-90 - Damper test | Damper test notifications | Read |
No points match these filters.
Object ID lookup: FläktGroup OPTIVENT UltraSafe USFA control unit point IDs by name
AI1Air duct sizeAI2Air duct size effectiveAI3Analog output 1AI4Analog output 2AI5Damper currentAI6Damper current open AVGAI8Damper current open maximumAI10Damper driving signalAI11Damper positionAI12Damper time closeAI14Damper time openAI16Damper voltageAI17Smoke detector currentAI18Smoke detector voltageAI19TemperatureAI22Volume flow absoluteAI23Volume flow relativeAI24Setpoint via analog input 1AI25PI control active valueAI26PI control active setpointAV1Analog output 2 overrideAV2Volume flow setpointAV7Damper min. driving signalAV8Damper close timeoutAV9Damper open timeoutAV17Smoke detector fire thresholdAV18Smoke detector service thresholdAV21Volume flow attenuationAV22Volume flow betweenAV23Volume flow maximumAV24Volume flow minimumAV25Volume flow nominalBI1Service alarmBI2Damper test activeBI3Damper test failureBI4Damper failureBV1Alarm & Event resetBV2Damper testBV3External AlarmBV4External InterlockBV5UltraSonic zero-calibrationBV6UltraSonic factory-resetBV7External fire damper control systemBV8Air flow setpoint sourceBV17Smoke detectorBV18Smoke detector sourceMI1Machine stateMI2Smoke detector stateMI3UltraSonic calibrationMV1Override controlMV4Damper test resultIV1UltraSonic version majorIV2UltraSonic version minorTL1Damper time close logTL2Damper time open logTL3Damper current open AVG logTL4Damper current open maximum logTL5Volume flow setpoint logTL6Volume flow setpoint via AI 1 logLO0Damper PI controlNC10NC-10 - Danger notification (Life Safety)NC30NC-30 - Alarm tripping notificationNC50NC-50 - Maintenance notificationNC80NC-80 - Operating notificationNC90NC-90 - Damper test
Integration notes
- BitString Value objects (BSV 0-8) are listed with type Other; their bit texts are in the source.
- The Event Log object EL 0 is not listed as a point.
- The document prints no engineering units; descriptions give the printed value ranges (comma decimals converted).
- AV 2 Volume flow setpoint is used when BV 8 Air flow setpoint source is set to Bus.
- MV 4 Damper test result is printed with access W.
- This object list does not state the BACnet transport; the PICS it refers to is a separate document.
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 OPTIVENT UltraSafe USFA control unit 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 FläktGroup OPTIVENT UltraSafe USFA control unit
How many BACnet points does the FläktGroup OPTIVENT UltraSafe USFA control unit have?
This list has 74 BACnet objects: 20 analog inputs, 12 analog values, 4 binary inputs, 10 binary values, 1 loop, 3 multi-state inputs, 5 notification classs, 2 multi-state values, 6 trend logs, 2 integer values, 9 others. The exact set on a given unit depends on its firmware, installed options and configuration.
Which FläktGroup OPTIVENT UltraSafe USFA control unit BACnet points are writable?
24 of the 74 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 FläktGroup OPTIVENT UltraSafe USFA control unit BACnet documentation?
The source is OPTIVENT UltraSafe USFA Control Unit BACnet Objects (DC_10786GB 20231115_R0), revision 2023-11-15, published free by FläktGroup at https://www.flaktgroup.com/api/v1/Documents/1359816/Download.
What are the minimum BACnet points to integrate the FläktGroup OPTIVENT UltraSafe USFA control unit?
Start with AV 2 Volume flow setpoint (Relative airflow setpoint, %); BV 8 Air flow setpoint source (Active = Bus: BMS supplies the flow setpoint); BV 2 Damper test (Start a damper test); BV 1 Alarm & Event reset (Reset alarms and events); MI 1 Machine state (Unit state (normal, damper test, fault, interlock)); AI 11 Damper position (Damper position, %); AI 23 Volume flow relative (Relative airflow, %); MI 2 Smoke detector state (Smoke detector state incl. fire alarm); BI 4 Damper failure (Damper failure); BI 1 Service alarm (Service alarm active).
Can the BMS supply sensor values to the FläktGroup OPTIVENT UltraSafe USFA control unit?
BV 8 Air flow setpoint source selects Analog (analog input 1) or Bus; on Bus the BMS writes AV 2 Volume flow setpoint.
How do I check these points on the real OPTIVENT UltraSafe USFA control unit?
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.
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Source: OPTIVENT UltraSafe USFA Control Unit BACnet Objects · DC_10786GB 20231115_R0 · rev. 2023-11-15. Object names, instances and units are reproduced as published; descriptions are our own.