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Thermostat (BACnet MS/TP) · BACnet points list
Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat BACnet points list
Updated 12 November 2026
The OS537H-EH controls electric heat with up to six on/off stages and a modulating vernier stage (SSR pulsed or SCR 0-10 V), from room temperature, supply temperature, both, or an external 2-10 V BMS signal. Its BACnet MS/TP objects give setpoints, staging settings, stage demands and statuses, the effective stage count and two PID loops.
This page lists 61 BACnet objects for the Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat — 30 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Strato Automation’s own free documentation, linked below.
- Manufacturer
- Strato Automation
- Model
- OPENSTAT OS537H-EH electric heat staging thermostat
- Equipment
- Thermostat (BACnet MS/TP)
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 61 (30 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Also known as
- OS537H-EH, OS537HEH, OpenStat OS537H-EH, Strato OS537H-EH
Reference only, provided as-is: verify against Strato Automation’s current documentation and the live device before use. Not official Strato Automation information. Terms of use.
BMS integration notes: Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat
Write the room setpoint (AV-1), and the supply setpoint (AV-2) for supply or dual control. Read room and supply temperatures, heating demand and the stage statuses. With MSV-3 = ExtBMS a 2-10 V signal on AI-1 sets the heating demand directly.
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 1 | RoomSetp | Room temperature setpoint | Write |
| AV 2 | Supp_SP | Supply temperature setpoint | Write |
| MV 3 | CtrlTyp | Control type: Intern, Supply, Dual, ExtBMS | Write |
| AI 6 | RoomT | Room temperature | Read |
| AI 3 | AI_3_Supply | Supply temperature | Read |
| AV 101 | Htg_Dem | Heating demand, % | Read |
| MV 101 | EffStgQty | Stages on | Read |
Enable & remote start
MSV-3 CtrlTyp = ExtBMS makes a 2-10 VDC signal on AI-1 drive the heating demand (AV-101, 0-100 %) directly.
Network setup
- MS/TP address and baud are set in the MSTP Config menu.
- MSV-1 sets the number of stages and MSV-2 the vernier ratio.
Watch out for
- AV-3 sets the minimum interstage and on/off delays; BV-1 to 6 show stage demand before delays, BV-21 to 26 after.
Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat 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.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| BO | 1 | BO_1_Stg1 | Stage 1 output | Command | ||
| BO | 2 | BO_2_Stg2 | Stage 2 output | Command | ||
| BO | 3 | BO_3_Stg3 | Stage 3 output | Command | ||
| BO | 4 | BO_4_Stg4 | Stage 4 output | Command | ||
| BO | 5 | BO_5_Stg5 | Stage 5 output | Command | ||
| BO | 6 | BO_6_Stg6 | Stage 6 output | Command | ||
| AO | 1 | AO1 | Unused | Command | ||
| AO | 2 | AO_2_SSR | Vernier SSR 0/10Vdc 2sec pulses output | Command | ||
| AO | 3 | AO_3_SCR | Vernier SCR 0 to 10Vdc analog output | Command | ||
| AO | 7 | BO_7_SSR | Vernier SSR 24Vac 2sec pulses output | Command | ||
| AI | 1 | AI_1_BMS | External BMS input signal 2-10Vdc | Read | ||
| AI | 2 | AI_2 | Unused | Read | ||
| AImin | 3 | AI_3_Supply | Supply temperature sensor | °F | Read | |
| AI | 4 | AI_4_RemRoom | Remote room temperature sensor | °F | Read | |
| AI | 5 | AI_5 | Unused | Read | ||
| AImin | 6 | RoomT | Internal room room temperature sensor | °F | Read | |
| AI | 7 | RoomRH | Room humidity | % | Read | |
| AVmin | 1 | RoomSetp | Room temperature setpoint (range 50-120°F) | °F | Write | |
| AVmin | 2 | Supp_SP | Supply temperature setpoint (range 50-120°F) | °F | Write | |
| AV | 3 | Stg_Dly | Interstage / On / Off min. time delays (range 0-120 Sec) | s | Write | |
| AV | 4 | Min_SP | Set minimum setpoint (range 32-150°F) | °F | Write | |
| AV | 5 | Max_SP | Set maximum setpoint (range 32-150°F) | °F | Write | |
| AV | 14 | RoomPB | Adjust room heating prop band (range 1-10°F) | °F | Write | |
| AV | 15 | SupplyPB | Adjust supply heating prop band (range 10-60°F) | °F | Write | |
| AV | 16 | RoomCal | Room temperature calib (range -5 to +5°F) | °F | Write | |
| AV | 17 | SuppCal | Supply temperature calib (range -5 to +5°F) | °F | Write | |
| AV | 100 | StagesDem | Calculated stages demand (internal use) (range 50-120°F) | °F | Read | |
| AVmin | 101 | Htg_Dem | Heating demand (internal use) (range 0-100%) | % | Read | |
| AV | 102 | VernierDem | Calc vernier demand (internal use) (range 0-100%) | % | Read | |
| AV | 110 | Eff_SuppTemp | Supply temperature (Calibrated) | Read | ||
| AV | 111 | EffRoomT | Effective temp for ctrl (Calibrated) | Read | ||
| AV | 200 | guiMainDisplay | AV Display on the Gui | Read | ||
| AV | 201 | guiSetPtDisplay | SetPoint Display on the Gui | Write | ||
| BV | 1 | StgDem1 | Stage 1 demand (no delay) | Read | Inactive = Off, Active = On | |
| BV | 2 | StgDem2 | Stage 2 demand (no delay) | Read | Inactive = Off, Active = On | |
| BV | 3 | StgDem3 | Stage 3 demand (no delay) | Read | Inactive = Off, Active = On | |
| BV | 4 | StgDem4 | Stage 4 demand (no delay) | Read | Inactive = Off, Active = On | |
| BV | 5 | StgDem5 | Stage 5 demand (no delay) | Read | Inactive = Off, Active = On | |
| BV | 6 | StgDem6 | Stage 6 demand (no delay) | Read | Inactive = Off, Active = On | |
| BV | 21 | Stage1 | Stage 1 status (with delays) | Read | Inactive = Off, Active = On | |
| BV | 22 | Stage2 | Stage 2 status (with delays) | Read | Inactive = Off, Active = On | |
| BV | 23 | Stage3 | Stage 3 status (with delays) | Read | Inactive = Off, Active = On | |
| BV | 24 | Stage4 | Stage 4 status (with delays) | Read | Inactive = Off, Active = On | |
| BV | 25 | Stage5 | Stage 5 status (with delays) | Read | Inactive = Off, Active = On | |
| BV | 26 | Stage6 | Stage 6 status (with delays) | Read | Inactive = Off, Active = On | |
| MV | 1 | Stg_Qty | Select number of stages | Write | 1 = 0 Stage, 2 = 1 Stage, 3 = 2 Stage, 4 = 3 Stage, 5 = 4 Stage, 6 = 5 Stage, 7 = 6 Stage | |
| MV | 2 | V_Ratio | Select vernier ratio | Write | 1 = 100%, 2 = 200% | |
| MVmin | 3 | CtrlTyp | Control type | Write | 1 = Intern, 2 = Supply, 3 = Dual, 4 = ExtBMS | |
| MV | 4 | S_Logic | Control stages logic | Write | 1 = LIFO, 2 = FIFO | |
| MV | 5 | CFGSens | Remote thermistor 10K | Write | 1 = Type 3, 2 = Type 2 | |
| MV | 100 | RequestStgQty | Stages request to On | Read | 1 = 0 Stage, 2 = 1 Stage, 3 = 2 Stage, 4 = 3 Stage, 5 = 4 Stage, 6 = 5 Stage, 7 = 6 Stage | |
| MVmin | 101 | EffStgQty | Effective stages quantity to On | Read | 1 = 0 Stage, 2 = 1 Stage, 3 = 2 Stage, 4 = 3 Stage, 5 = 4 Stage, 6 = 5 Stage, 7 = 6 Stage | |
| MV | 102 | NextFI | Next stage In | Read | 1 = Stage 1, 2 = Stage 2, 3 = Stage 3, 4 = Stage 4, 5 = Stage 5, 6 = Stage 6 | |
| MV | 103 | NextFO | Next stage Out | Read | 1 = Stage 1, 2 = Stage 2, 3 = Stage 3, 4 = Stage 4, 5 = Stage 5, 6 = Stage 6 | |
| MV | 200 | Brightness | Brightness Control | Write | 1 = Low, 2 = Med-Low, 3 = Med | |
| MV | 201 | BgColor | Background Color | Write | 1 = White, 2 = Orange, 3 = Blue, 4 = Green, 5 = Red | |
| MV | 202 | LockTemp | Main Display | Write | 1 = Temp, 2 = Setpoint, 3 = Nothing | |
| MV | 203 | Language | Language selection | Write | 1 = English, 2 = French | |
| MV | 204 | Display_Units | Temperature displayed units | Write | 1 = C, 2 = F | |
| LO | 2 | PIDRoomT | Room temp heating control loop | % | Read | |
| LO | 6 | PIDSuppT | Supply temp control loop | % | Read |
No points match these filters.
Object ID lookup: Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat point IDs by name
BO1BO_1_Stg1BO2BO_2_Stg2BO3BO_3_Stg3BO4BO_4_Stg4BO5BO_5_Stg5BO6BO_6_Stg6AO1AO1AO2AO_2_SSRAO3AO_3_SCRAO7BO_7_SSRAI1AI_1_BMSAI2AI_2AI3AI_3_SupplyAI4AI_4_RemRoomAI5AI_5AI6RoomTAI7RoomRHAV1RoomSetpAV2Supp_SPAV3Stg_DlyAV4Min_SPAV5Max_SPAV14RoomPBAV15SupplyPBAV16RoomCalAV17SuppCalAV100StagesDemAV101Htg_DemAV102VernierDemAV110Eff_SuppTempAV111EffRoomTAV200guiMainDisplayAV201guiSetPtDisplayBV1StgDem1BV2StgDem2BV3StgDem3BV4StgDem4BV5StgDem5BV6StgDem6BV21Stage1BV22Stage2BV23Stage3BV24Stage4BV25Stage5BV26Stage6MV1Stg_QtyMV2V_RatioMV3CtrlTypMV4S_LogicMV5CFGSensMV100RequestStgQtyMV101EffStgQtyMV102NextFIMV103NextFOMV200BrightnessMV201BgColorMV202LockTempMV203LanguageMV204Display_UnitsLO2PIDRoomTLO6PIDSuppT
Integration notes
- The guide has no read/write column. Access here follows its tags: Cfg, User and Cmd objects are shown writable, Status objects read-only, and BO/AO objects commandable (the guide lists them for output overrides).
- AO-7 is printed with the object name BO_7_SSR (the 24 Vac pulsed SSR output).
- AV-100 is printed with the range 50-120°F although it is a percentage demand.
- Multistate state numbers follow the order the states are printed, starting at 1.
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 OPENSTAT OS537H-EH electric heat staging thermostat 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 Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat
How many BACnet points does the Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat have?
This list has 61 BACnet objects: 7 analog inputs, 4 analog outputs, 16 analog values, 6 binary outputs, 12 binary values, 2 loops, 14 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat BACnet points are writable?
30 of the 61 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. The source has no read/write column, so this is inferred from object type.
Where is the official Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat BACnet documentation?
The source is OS537H-EH Technical User Guide, BACnet Objects, revision Sept 2024 rev 0, published free by Strato Automation at https://stratoautomation.com/wp-content/uploads/2025/01/OS537H-EH-Technical-User-Guide-Sept-2024-rev-0.pdf.
What are the minimum BACnet points to integrate the Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat?
Start with AV 1 RoomSetp (Room temperature setpoint); AV 2 Supp_SP (Supply temperature setpoint); MV 3 CtrlTyp (Control type: Intern, Supply, Dual, ExtBMS); AI 6 RoomT (Room temperature); AI 3 AI_3_Supply (Supply temperature); AV 101 Htg_Dem (Heating demand, %); MV 101 EffStgQty (Stages on).
How do I enable BMS control of the Strato Automation OPENSTAT OS537H-EH electric heat staging thermostat?
MSV-3 CtrlTyp = ExtBMS makes a 2-10 VDC signal on AI-1 drive the heating demand (AV-101, 0-100 %) directly.
How do I check these points on the real OPENSTAT OS537H-EH electric heat staging thermostat?
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 Strato Automation BACnet points lists
- Thermostat (BACnet MS/TP)
Strato Automation OPENSTAT OS214 / OS214x thermostat, FCU firmware
Strato OS214 / OS214W room thermostats running the fan coil (2-pipe / 4-pipe) application of the universal firmware.
Also known as: OS214, OS214W, OS214x, OpenStat OS214, OS214-FCU, Strato OS214 - Thermostat (BACnet MS/TP)
Strato Automation OPENSTAT OS214 / OS214x thermostat, RTU firmware
Strato OS214 / OS214W (Wi-Fi) room thermostats running the rooftop-unit / heat-pump application of the universal firmware.
Also known as: OS214, OS214W, OS214x, OpenStat OS214, OS214-RTU, Strato OS214 - Thermostat (BACnet MS/TP)
Strato Automation OPENSTAT OS214-EH electric heat thermostat
Strato OS214-EH thermostats controlling electric heat (baseboard, duct heater) from room and/or supply temperature.
Also known as: OS214-EH, OS214EH, OpenStat OS214-EH, Strato OS214-EH - Thermostat (BACnet MS/TP)
Strato Automation OPENSTAT OS537 thermostat, FCU firmware
Strato OS537 thermostats running the 2-pipe / 4-pipe fan coil application of the universal firmware.
Also known as: OS537, OS537H, OS537MHC, OpenStat OS537, OS537-FCU, Strato OS537 - Thermostat (BACnet MS/TP)
Strato Automation OPENSTAT OS537 thermostat, RTU firmware
Strato OS537 temperature/humidity thermostats running the rooftop unit, heat pump and small AHU applications of the universal firmware.
Also known as: OS537, OS537H, OS537MHC, OpenStat OS537, OS537-RTU, Strato OS537
Source: OS537H-EH Technical User Guide, BACnet Objects · rev. Sept 2024 rev 0. Object names, instances and units are reproduced as published; descriptions are our own.