Easy BACnet- Home
- BACnet points lists
- Paragon Controls
- SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP)
Room pressure monitor and controller · BACnet points list
Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP) BACnet points list
Updated 12 November 2026
The SPM-4000 Guardian Infinity watches the pressure of two spaces and runs one control loop. On BACnet MS/TP it gives both pressures, temperature, humidity and flow inputs, the air-change rate, per-space modes and alarm limits, and the controller setpoints and tuning.
This page lists 35 BACnet objects for the Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP) — 23 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Paragon Controls’s own free documentation, linked below.
- Manufacturer
- Paragon Controls
- Model
- SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP)
- Equipment
- Room pressure monitor and controller
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 35 (23 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Also known as
- SPM-4000, SPM4000, Guardian Infinity, Paragon Guardian Infinity
Reference only, provided as-is: verify against Paragon Controls’s current documentation and the live device before use. Not official Paragon Controls information. Terms of use.
BMS integration notes: Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP)
Set each space's mode (MSV 1 / MSV 3) and the controller setpoint for that mode (AV 11-13). Read the space pressures, the system start status and the two alarm status multistates.
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 1 | Sp1 Operating Mode | Space 1 mode: 1 off, 2 positive, 3 negative | Write |
| MV 3 | Sp2 Operating Mode | Space 2 mode: 1 off, 2 positive, 3 negative | Write |
| AV 11 | Cnt Pos Setpoint | Controller setpoint in positive mode | Write |
| AV 12 | Cnt Neg Setpoint | Controller setpoint in negative mode | Write |
| BI 1 | Sys Start In Status | System start input, 1 = run | Read |
| AI 1 | Sp1 Process Value | Space 1 differential pressure | Read |
| AI 2 | Sp2 Process Value | Space 2 differential pressure | Read |
| MV 2 | Sp1 Alarm Status | Space 1 alarm: 1 none, 2 high, 3 low | Read |
| MV 4 | Sp2 Alarm Status | Space 2 alarm: 1 none, 2 high, 3 low | Read |
Enable & remote start
Run/stop comes from the hard-wired system start input; BI 1 only reports it.
Network setup
- MS/TP MAC address 2-127, unique on each trunk; set at the device (see the device O&M).
- Baud 9600, 19200, 38400 or 76800; the SPM-3000 section gives 38400 as the default.
- Turn the BACnet terminator switch ON only on the two end devices of the trunk.
- Device instance 1,002 to 65,535.
Watch out for
- AV 20 is the front-panel password; leave it alone unless asked.
Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (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 | Sp1 Process Value | Space 1 pressure | Per MSV 5 | Read | |
| AImin | 2 | Sp2 Process Value | Space 2 pressure | Per MSV 5 | Read | |
| AI | 3 | Temperature Input | Temperature input | Per MSV 6 | Read | |
| AI | 4 | Humidity Input | Humidity input | Read | ||
| AI | 5 | Flow Input | Flow input | Read | ||
| AV | 1 | Sp1 Operating Range | Space 1 pressure span | Read | ||
| AV | 2 | Sp1 Pos High Alarm | Space 1 high limit, positive mode | Write | ||
| AV | 3 | Sp1 Pos Low Alarm | Space 1 low limit, positive mode | Write | ||
| AV | 4 | Sp1 Neg High Alarm | Space 1 high limit, negative mode | Write | ||
| AV | 5 | Sp1 Neg Low Alarm | Space 1 low limit, negative mode | Write | ||
| AV | 6 | Sp2 Operating Range | Space 2 pressure span | Read | ||
| AV | 7 | Sp2 Pos High Alarm | Space 2 high limit, positive mode | Write | ||
| AV | 8 | Sp2 Pos Low Alarm | Space 2 low limit, positive mode | Write | ||
| AV | 9 | Sp2 Neg High Alarm | Space 2 high limit, negative mode | Write | ||
| AV | 10 | Sp2 Neg Low Alarm | Space 2 low limit, negative mode | Write | ||
| AVmin | 11 | Cnt Pos Setpoint | Controller setpoint, positive mode | Write | ||
| AVmin | 12 | Cnt Neg Setpoint | Controller setpoint, negative mode | Write | ||
| AV | 13 | Cnt Off Setpoint | Controller setpoint, off mode | Write | ||
| AV | 14 | Cnt Prop Band | Controller proportional band | Write | ||
| AV | 15 | Cnt Integral Time | Controller integral time | Write | ||
| AV | 16 | Cnt Derivative Time | Controller derivative time | Write | ||
| AV | 17 | ACH Value | Air changes per hour | Read | ||
| AV | 18 | Sp1 Alarm Delay | Space 1 alarm delay | Write | ||
| AV | 19 | Sp2 Alarm Delay | Space 2 alarm delay | Write | ||
| AV | 20 | Field Password | Front-panel password | Write | ||
| AV | 21 | Decimal Point | Display decimal places | Write | ||
| BImin | 1 | Sys Start In Status | System start input | Read | 0=Off, 1=Run | |
| BI | 2 | Sys Hold In Status | System hold input | Read | 0=Off, 1=On | |
| BV | 1 | Audible Alarm Enable | Audible alarm on/off | Write | 0=Off, 1=On | |
| MVmin | 1 | Sp1 Operating Mode | Space 1 mode | Write | 1=Off, 2=Pos, 3=Neg | |
| MVmin | 2 | Sp1 Alarm Status | Space 1 alarm state | Read | 1=No Alarms, 2=High, 3=Low | |
| MVmin | 3 | Sp2 Operating Mode | Space 2 mode | Write | 1=Off, 2=Pos, 3=Neg | |
| MVmin | 4 | Sp2 Alarm Status | Space 2 alarm state | Read | 1=No Alarms, 2=High, 3=Low | |
| MV | 5 | Engineering Units | Pressure units | Write | 1="W.C., 2=Pa, 3=KPa, 4=mmW.C. | |
| MV | 6 | Temp Eng Units | Temperature units | Write | 1=F, 2=C |
No points match these filters.
Object ID lookup: Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller point IDs by name
AI1Sp1 Process ValueAI2Sp2 Process ValueAI3Temperature InputAI4Humidity InputAI5Flow InputAV1Sp1 Operating RangeAV2Sp1 Pos High AlarmAV3Sp1 Pos Low AlarmAV4Sp1 Neg High AlarmAV5Sp1 Neg Low AlarmAV6Sp2 Operating RangeAV7Sp2 Pos High AlarmAV8Sp2 Pos Low AlarmAV9Sp2 Neg High AlarmAV10Sp2 Neg Low AlarmAV11Cnt Pos SetpointAV12Cnt Neg SetpointAV13Cnt Off SetpointAV14Cnt Prop BandAV15Cnt Integral TimeAV16Cnt Derivative TimeAV17ACH ValueAV18Sp1 Alarm DelayAV19Sp2 Alarm DelayAV20Field PasswordAV21Decimal PointBI1Sys Start In StatusBI2Sys Hold In StatusBV1Audible Alarm EnableMV1Sp1 Operating ModeMV2Sp1 Alarm StatusMV3Sp2 Operating ModeMV4Sp2 Alarm StatusMV5Engineering UnitsMV6Temp Eng Units
Integration notes
- The manual gives each object as '<object type> <number> - <label>'; the label is used here as the object name.
- The table lists no Analog Output for the single controller even though the PICS names the AO object type.
- Device instance range 1,002 to 65,535 per the manual.
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 SPM-4000 Guardian Infinity space pressure monitor / controller (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 Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP)
How many BACnet points does the Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP) have?
This list has 35 BACnet objects: 5 analog inputs, 21 analog values, 2 binary inputs, 1 binary value, 6 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP) BACnet points are writable?
23 of the 35 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 Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP) BACnet documentation?
The source is BACnet Communication Operation & Maintenance Manual (MicroTransEQ, MicroTransII, SPM-3000, SPM-4000), revision Revision Level 003, published free by Paragon Controls at https://paragoncontrols.com/wp-content/uploads/2021/03/BACnet-IOM.pdf.
What are the minimum BACnet points to integrate the Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP)?
Start with MV 1 Sp1 Operating Mode (Space 1 mode: 1 off, 2 positive, 3 negative); MV 3 Sp2 Operating Mode (Space 2 mode: 1 off, 2 positive, 3 negative); AV 11 Cnt Pos Setpoint (Controller setpoint in positive mode); AV 12 Cnt Neg Setpoint (Controller setpoint in negative mode); BI 1 Sys Start In Status (System start input, 1 = run); AI 1 Sp1 Process Value (Space 1 differential pressure); AI 2 Sp2 Process Value (Space 2 differential pressure); MV 2 Sp1 Alarm Status (Space 1 alarm: 1 none, 2 high, 3 low); MV 4 Sp2 Alarm Status (Space 2 alarm: 1 none, 2 high, 3 low).
How do I enable BMS control of the Paragon Controls SPM-4000 Guardian Infinity space pressure monitor / controller (BACnet MS/TP)?
Run/stop comes from the hard-wired system start input; BI 1 only reports it.
How do I check these points on the real SPM-4000 Guardian Infinity space pressure monitor / controller (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 Paragon Controls BACnet points lists
- Airflow / pressure transmitter
Paragon Controls MicroTransEQ airflow / pressure transmitter (BACnet MS/TP)
Paragon Controls MicroTransEQ flow, velocity and pressure transmitters fitted with the BACnet communication board.
Also known as: MicroTransEQ, MicroTrans EQ, EQ device, Paragon MicroTransEQ - Airflow / pressure transmitter with controller
Paragon Controls MicroTransII flow / pressure transmitter-controller (BACnet MS/TP)
Paragon Controls MicroTransII flow, velocity and pressure transmitters with built-in controller, fitted with the BACnet communication board.
Also known as: MicroTransII, MicroTrans II, MT2 device, Paragon MicroTrans II - Airflow measuring station (multi-system)
Paragon Controls MTSE Multi-Trans Smart Ecosystem flow / pressure station (BACnet MS/TP)
Paragon Controls MTSE multi-sensor flow and pressure stations with up to three systems plus a sub system.
Also known as: MTSE, Multi-Trans Smart Ecosystem, Paragon MTSE - Room pressure monitor
Paragon Controls SPM-3000 Micro Guardian space pressure monitor (BACnet MS/TP)
Paragon Controls SPM-3000 (Micro Guardian) single-space pressure monitors with the BACnet communication board.
Also known as: SPM-3000, SPM3000, Micro Guardian, Paragon Micro Guardian - Room pressure dual controller
Paragon Controls SPM-4000 Dual Controller space pressure monitor (BACnet MS/TP)
Paragon Controls SPM-4000 Dual Controller two-space pressure monitors with two control loops, fitted with the BACnet communication board.
Also known as: SPM-4000 Dual Controller, SPM4000 Dual, Guardian Infinity Dual Controller
Source: BACnet Communication Operation & Maintenance Manual (MicroTransEQ, MicroTransII, SPM-3000, SPM-4000) · rev. Revision Level 003. Object names, instances and units are reproduced as published; descriptions are our own.