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Fire and smoke damper actuator test module · BACnet points list
Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module BACnet points list
Updated 6 November 2026
The FSKN-BAC sits in the power feed of a fire or fire/smoke damper actuator and lets a BMS run a remote damper test. A test opens its relay so the damper springs closed, and the end switches are checked to prove the stroke; the result and the damper position are read over BACnet MS/TP (the same board also speaks Modbus RTU, chosen with DIP switch 6).
This page lists 9 BACnet objects for the Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module — 2 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
- FSKN120-BAC / FSKN24-BAC fire and smoke damper test module
- Equipment
- Fire and smoke damper actuator test module
- Equipment type
- Valves & actuators
- BACnet objects
- 9 (2 writable)
- Transport
- BACnet MS/TP
- Firmware
- Application 1.0.4
- Also known as
- FSKN120-BAC, FSKN24-BAC, FSKN, Belimo FSKN BACnet
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 FSKN120-BAC / FSKN24-BAC fire and smoke damper test module
Set DIP switch 6 ON for BACnet, set baud and MAC with the DIP switches, then write 3 (Test) to MV 120 to run a damper test. Read AI 1 position and BI 101 summary status for the result, and write 4 (Reset) to MV 120 to clear latched status.
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 |
|---|---|---|---|
| MV 120 | Command | Write 3 = Test to stroke the damper, 4 = Reset | Write |
| AI 1 | RelPos | Damper position: 0, 50 or 100 % | Read |
| MI 100 | InternalActivity | Shows a test is running | Read |
| BI 101 | SummaryStatus | Test or device fault summary | Read |
Enable & remote start
Writing 3 (Test) to MV 120 opens the module's relay so the damper springs closed; the position switches prove it. The value returns to None (1) by itself.
Network setup
- DIP switches 1-2 set the baud rate (9600, 19200, 38400, 76800); a separate 8-switch address block sets the MAC address 0-127.
- DIP switch 6 ON = BACnet, OFF = Modbus; DIP switch 5 ON enables the 150 ohm end-of-line termination.
- Device instance = AV 121 OffsetDeviceID (default 1000) + MAC address.
Watch out for
- Not for smoke control safety functions; spring-return closed dampers only.
- Status flags stay set until MV 120 = 4 (Reset).
- Up to 64 active COV subscriptions, lifetime up to 8 hours.
Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module 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 | Damper position from the position switches (0, 50 or 100 %) | % | Read | |
| AI | 2 | AbsPos | Absolute position (0, 45 or 90°) | ° | Read | |
| AV | 121 | OffsetDeviceID | Device instance offset; instance = offset + MAC (default 1000) | Write | ||
| BImin | 101 | SummaryStatus | Summary of MI 106, MI 110 and MI 111 | Read | 0=OK, 1=Not OK | |
| MImin | 100 | InternalActivity | Test running, started by bus | Read | 1=None, 2=Test | |
| MI | 106 | StatusActuator | Actuator status (needs reset) | Read | 1=OK, 2=Actuator cannot move | |
| MI | 110 | StatusDevice | Device status (needs reset) | Read | 1=OK, 2=-, 3=InternalError | |
| MI | 111 | StatusTripping | Duct temperature sensor (BAE) status (needs reset) | Read | 1=OK, 2=-, 3=Temperature Sensor triggered | |
| MVmin | 120 | Command | Start a damper test or reset status; returns to None | Write | 1=None, 2=-, 3=Test, 4=Reset |
No points match these filters.
Object ID lookup: Belimo FSKN-BAC Damper Test Module point IDs by name
Integration notes
- State numbers are as printed; unused positions are shown as -.
- Belimo warns the FSKN is not UL 864 UUKL listed and must not be used for any smoke control safety function.
- Status flags (MI 106, MI 110, MI 111) latch until a Reset command is written to MV 120.
- The same guide also covers Modbus RTU registers, which are not listed 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 FSKN120-BAC / FSKN24-BAC fire and smoke damper test module 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 FSKN120-BAC / FSKN24-BAC fire and smoke damper test module
How many BACnet points does the Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module have?
This list has 9 BACnet objects: 2 analog inputs, 1 analog value, 1 binary input, 4 multi-state inputs, 1 multi-state value. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module BACnet points are writable?
2 of the 9 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 FSKN120-BAC / FSKN24-BAC fire and smoke damper test module BACnet documentation?
The source is FSKN120-BAC & FSKN24-BAC BACnet and Modbus protocol guide (AB_13004), revision 2025-10, published free by Belimo at https://www.belimo.com/mam/americas/technical_documents/Tools/belimo_FSKN120_FSKN24_BACnet_Modbus_guide_en-us.pdf.
What are the minimum BACnet points to integrate the Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module?
Start with MV 120 Command (Write 3 = Test to stroke the damper, 4 = Reset); AI 1 RelPos (Damper position: 0, 50 or 100 %); MI 100 InternalActivity (Shows a test is running); BI 101 SummaryStatus (Test or device fault summary).
How do I enable BMS control of the Belimo FSKN120-BAC / FSKN24-BAC fire and smoke damper test module?
Writing 3 (Test) to MV 120 opens the module's relay so the damper springs closed; the position switches prove it. The value returns to None (1) by itself.
How do I check these points on the real FSKN120-BAC / FSKN24-BAC fire and smoke damper test module?
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
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Also known as: EP..R-R6+BAC, 6-way EPIV, 6-way characterised control valve, Belimo 6-way valve - 6-way pressure-independent zone valve
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Belimo Air/Water Actuators (BACnet MS/TP)
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Belimo BKN230-24-MOD fire damper communication and power unit
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Belimo Energy Valve V4
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Belimo PR..-BAC-.. Butterfly Valve Actuator (BACnet MS/TP)
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Belimo Room Operating Unit 22RT-5U00
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Belimo Thermal Energy Meter V4
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Source: FSKN120-BAC & FSKN24-BAC BACnet and Modbus protocol guide · AB_13004 · rev. 2025-10. Object names, instances and units are reproduced as published; descriptions are our own.