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Room pressure monitor · BACnet points list
TSI PresSura 8631-HM Hospital Room Pressure Monitor BACnet points list
Updated 6 November 2026
The 8631-HM monitors isolation room pressure (negative, positive or no isolation) with an optional second sensor and a flow input, and alarms on pressure and minimum flow. With the BACnet board it is a BACnet MS/TP device exposing pressures, flow, air changes per hour, alarm limits, a Status Index alarm code and the room control mode.
This page lists 16 BACnet objects for the TSI PresSura 8631-HM Hospital Room Pressure Monitor — 11 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from TSI’s own free documentation, linked below.
- Manufacturer
- TSI
- Model
- PresSura 8631-HM Hospital Room Pressure Monitor
- Equipment
- Room pressure monitor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 16 (11 writable)
- Transport
- BACnet MS/TP
- Firmware
- 1.0 (PICS)
- Default device instance
- 863001
- Also known as
- 8631-HM, 8631-HM-BAC, PresSura 8631-HM
Reference only, provided as-is: verify against TSI’s current documentation and the live device before use. Not official TSI information. Terms of use.
BMS integration notes: TSI PresSura 8631-HM Hospital Room Pressure Monitor
Set the room mode with Control Mode (MV 2) and read room pressure, flow and the Status Index (MI 1) for 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 |
|---|---|---|---|
| MV 2 | Control Mode | 1 = negative, 2 = positive, 3 = no isolation | Write |
| AI 1 | Room Pressure | Room differential pressure | Read |
| AI 2 | Sec Sens Pressure | Second sensor pressure (e.g. anteroom) | Read |
| AI 3 | Flow Rate | Measured airflow | Read |
| AI 4 | Air Changes Per Hour | Calculated air changes per hour | Read |
| MI 1 | Status Index | Alarm state; 1 = normal | Read |
Network setup
- Set the MS/TP MAC with MAC Address (1-127) and the MAC ID with MAC ID (1-999, default 863).
- The device instance is MAC ID x 1000 + MAC address; the default is 863001.
Watch out for
- Pressure units change with Units Value (MV 3); check it before scaling pressures in the BMS.
- Changing MAC Address or MAC ID changes the device instance.
TSI PresSura 8631-HM Hospital Room Pressure Monitor 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 | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | Room Pressure | ft/min, m/s, in. H2O, Pa | Read | ||
| AImin | 2 | Sec Sens Pressure | Second pressure sensor | ft/min, m/s, in. H2O, Pa | Read | |
| AImin | 3 | Flow Rate | cfm, l/s | Read | ||
| AImin | 4 | Air Changes Per Hour | Read | |||
| AV | 1 | MAC Address | Range 1 to 127 | Write | ||
| AV | 2 | Neg Low Alarm | Range 0 to -0.195 in. H2O | ft/min, m/s, in. H2O, Pa | Write | |
| AV | 3 | Neg High Alarm | Range 0 to -0.195 in. H2O | ft/min, m/s, in. H2O, Pa | Write | |
| AV | 4 | Pos Low Alarm | Range 0 to 0.195 in. H2O | ft/min, m/s, in. H2O, Pa | Write | |
| AV | 5 | Pos High Alarm | Range 0 to 0.195 in. H2O | ft/min, m/s, in. H2O, Pa | Write | |
| AV | 6 | Sec Low Alarm | Range -0.195 to 0.195 in. H2O | ft/min, m/s, in. H2O, Pa | Write | |
| AV | 7 | Sec High Alarm | Range -0.195 to 0.195 in. H2O | ft/min, m/s, in. H2O, Pa | Write | |
| AV | 8 | Min Supply Alarm | Range 0 to 30,000 cfm | cfm, l/s | Write | |
| AV | 9 | MAC ID | Range 1 to 999; sets the device instance | Write | ||
| MImin | 1 | Status Index | Read | 1=Normal, 2=Low Alarm, 3=High Alarm, 4=Min Flow Alarm, 5=Sec Sens Low Alarm, 6=Sec Sens High Alarm, 7=Data Error | ||
| MVmin | 2 | Control Mode | Write | 1=Negative, 2=Positive, 3=No Isolation | ||
| MV | 3 | Units Value | Write | 1=ft/min, 2=m/s, 3="H2O, 4=Pa |
No points match these filters.
Object ID lookup: TSI PresSura 8631-HM Hospital Room Pressure Monitor point IDs by name
Integration notes
- From the Model 8631-HM BACnet MS/TP Object Set table (manual page 53). The table's Feature column is used as the object name.
- The table has no read/write column. Access is inferred from the PICS, which lists Present_Value as writable for Analog, Binary and Multi-state Values only.
- Units follow Units Value (MV 3): 1 = ft/min, 2 = m/s, 3 = in. H2O, 4 = Pa. Flow is cfm in English mode and l/s in metric mode.
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 PresSura 8631-HM Hospital Room Pressure Monitor 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 TSI PresSura 8631-HM Hospital Room Pressure Monitor
How many BACnet points does the TSI PresSura 8631-HM Hospital Room Pressure Monitor have?
This list has 16 BACnet objects: 4 analog inputs, 9 analog values, 1 multi-state input, 2 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which TSI PresSura 8631-HM Hospital Room Pressure Monitor BACnet points are writable?
11 of the 16 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 TSI PresSura 8631-HM Hospital Room Pressure Monitor BACnet documentation?
The source is PresSura Hospital Room Pressure Monitor/Controller, Models 8631-HM/8631-HC Operation and Service Manual (P/N 1980488), revision Revision J, published free by TSI at https://tsi.com/getmedia/0d020f91-9602-4aad-bd3e-d587ae6579d4/1980488-8631HM-HC-Pressura-web?ext=.pdf.
What are the minimum BACnet points to integrate the TSI PresSura 8631-HM Hospital Room Pressure Monitor?
Start with MV 2 Control Mode (1 = negative, 2 = positive, 3 = no isolation); AI 1 Room Pressure (Room differential pressure); AI 2 Sec Sens Pressure (Second sensor pressure (e.g. anteroom)); AI 3 Flow Rate (Measured airflow); AI 4 Air Changes Per Hour (Calculated air changes per hour); MI 1 Status Index (Alarm state; 1 = normal).
How do I check these points on the real PresSura 8631-HM Hospital Room Pressure Monitor?
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 TSI BACnet points lists
- Laboratory room airflow and pressure controller
TSI Laboratory Room Controller (LRC)
TSI LRC modular laboratory room controllers handling up to 6 supplies, 2 general exhausts and 20 fume hoods.
Also known as: LRC, LRC00, LRC00-LPS, LRC00-CMH, TSI LRC, Lab Room Controller - Room pressure controller
TSI PresSura 8631-CRC Clean Room Pressure Controller
TSI PresSura Model 8631-CRC-BAC clean room pressure controllers with the BACnet board.
Also known as: 8631-CRC, 8631-CRC-BAC, PresSura 8631-CRC - Room pressure monitor
TSI PresSura 8631-CRM Clean Room Pressure Monitor
TSI PresSura Model 8631-CRM-BAC clean room pressure monitors with the BACnet board.
Also known as: 8631-CRM, 8631-CRM-BAC, PresSura 8631-CRM - Room pressure controller
TSI PresSura 8631-HC Hospital Room Pressure Controller
TSI PresSura Model 8631-HC hospital isolation room pressure controllers with the BACnet board.
Also known as: 8631-HC, 8631-HC-BAC, PresSura 8631-HC - Room pressure controller
TSI PresSura RPC30 Room Pressure Controller
TSI PresSura RPC30 controllers that hold one room (optionally with an anteroom) at a set pressure by driving exhaust, supply and reheat outputs.
Also known as: RPC30, PresSura RPC30, RPC30 PresSura - Room pressure monitor
TSI PresSura RPM10 Room Pressure Monitor
TSI PresSura RPM10 single-room pressure monitors.
Also known as: RPM10, PresSura RPM10, RPM10 PresSura - Room pressure monitor
TSI PresSura RPM20 Room Pressure Monitor
TSI PresSura RPM20 room pressure monitors for one room, a room with anteroom, or two rooms with an anteroom.
Also known as: RPM20, PresSura RPM20, RPM20 PresSura - Room pressure monitor
TSI PresSura RPM20-CC Room Pressure Monitor (particle counting)
TSI PresSura RPM20-CC room pressure monitors with particle counter channels, for clean rooms.
Also known as: RPM20-CC, PresSura RPM20-CC, RPM20 CC - Room pressure controller
TSI SureFlow 8636 Room Pressure Controller
TSI SureFlow Model 8636-BAC room pressure controllers with the BACnet MS/TP board.
Also known as: 8636, 8636-BAC, SureFlow 8636 - Laboratory room pressure and airflow offset controller
TSI SureFlow 8681 Adaptive Offset Controller
TSI SureFlow Model 8681-BAC adaptive offset (lab room) controllers with the BACnet MS/TP board.
Also known as: 8681, 8681-BAC, SureFlow 8681 - Laboratory room pressure and airflow offset controller
TSI SureFlow 8682 Adaptive Offset Controller
TSI SureFlow Model 8682-BAC adaptive offset controllers (up to 4 supplies, 2 general exhausts and 7 hoods) with the BACnet MS/TP board.
Also known as: 8682, 8682-BAC, SureFlow 8682
Source: PresSura Hospital Room Pressure Monitor/Controller, Models 8631-HM/8631-HC Operation and Service Manual · P/N 1980488 · rev. Revision J. Object names, instances and units are reproduced as published; descriptions are our own.