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Room differential pressure sensor / monitor · BACnet points list
Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP) BACnet points list
Updated 6 November 2026
The RPC is a Greystone room pressure monitor with native BACnet MS/TP. The pressure reading is one Analog Input; averaging time, high/low alarm limits, alarm delays, silence time and buzzer volume are Analog Values; Binary Values set alarm enable/test, backlight, units and range, and three Binary Inputs report the alarms.
This page lists 16 BACnet objects for the Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP) — 12 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Greystone Energy Systems’s own free documentation, linked below.
- Manufacturer
- Greystone Energy Systems
- Model
- RPC Series room pressure sensor (BACnet MS/TP)
- Equipment
- Room differential pressure sensor / monitor
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 16 (12 writable)
- Transport
- BACnet MS/TP
- Firmware
- 1.4 (PICS, Nov 8, 2013)
- Default device instance
- 381003
- Also known as
- RPC, RPCXXXBAC, Greystone room pressure monitor
Reference only, provided as-is: verify against Greystone Energy Systems’s current documentation and the live device before use. Not official Greystone Energy Systems information. Terms of use.
BMS integration notes: Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP)
Set the MS/TP MAC in the menu, choose units and range, then read the room pressure (AI 1) and the alarm BIs. Set the alarm limits once at commissioning.
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 |
|---|---|---|---|
| AI 1 | Pressure Sensor Value | Room differential pressure | Read |
| BI 1 | Alarm Status | Any pressure alarm | Read |
| BI 2 | Low Alarm Status | Low pressure alarm | Read |
| BI 3 | High Alarm Status | High pressure alarm | Read |
Network setup
- Device instance defaults to 381003 (381000 + MAC); it stops following the MAC once written over BACnet.
Watch out for
- Changing BV 4 (units) changes the units of AI 1 and the alarm limits.
Greystone Energy Systems RPC Series room pressure sensor (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 | Pressure Sensor Value | Room differential pressure in the selected units | Pa / in. w.c. | Read | |
| AV | 1 | Pressure Averaging Time | Reading averaging time, 1-60 s (default 5) | s | Write | |
| AV | 2 | Alarm High Limit | High pressure alarm limit (default +50 % of range) | Pa / in. w.c. | Write | |
| AV | 3 | Alarm Low Limit | Low pressure alarm limit (default -50 % of range) | Pa / in. w.c. | Write | |
| AV | 4 | Alarm On Delay | Alarm on delay, 1 s to 10 min (default 5 s) | s | Write | |
| AV | 5 | Alarm Off Delay | Alarm off delay, 1 s to 10 min (default 5 s) | s | Write | |
| AV | 6 | Alarm Silence Time | Buzzer silence time, 1-60 min, 0 = no reset (default 30) | min | Write | |
| AV | 7 | Buzzer Volume | Buzzer volume (default 2) | Write | 0=Off, 1=Low, 2=High | |
| BV | 1 | Alarm Enable | Alarm functions enable (normally 1) | Write | 0=Alarm Disable, 1=Alarm Enable | |
| BV | 2 | Alarm Test | Write 1 to test the alarm | Write | 0=Normal Operation, 1=Alarm Test | |
| BV | 3 | Backlight Enable | LCD backlight (normally 1) | Write | 0=Disable, 1=Enable | |
| BV | 4 | Pressure Units | Pressure units (normally 0) | Write | 0=in. w.c., 1=Pa | |
| BV | 5 | Pressure Range | Pressure range select (normally 1) | Write | 0=Low Range, 1=High Range | |
| BImin | 1 | Alarm Status | Any pressure alarm | Read | 0=No Alarm, 1=Pressure Alarm | |
| BImin | 2 | Low Alarm Status | Low pressure alarm | Read | 0=No Low Alarm, 1=Low Alarm | |
| BImin | 3 | High Alarm Status | High pressure alarm | Read | 0=No High Alarm, 1=High Alarm |
No points match these filters.
Object ID lookup: Greystone Energy Systems RPC Series room pressure sensor point IDs by name
Integration notes
- Points from the object list on page 1 of the setup guide; the object pages print the names with underscores (e.g. Pressure_Units).
- Pressure objects follow BV 4 (in. w.c. or Pa); alarm limit defaults are half the selected range.
- Access from the object pages: AV and BV Present_Value are read/write.
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 RPC Series room pressure sensor (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 Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP)
How many BACnet points does the Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP) have?
This list has 16 BACnet objects: 1 analog input, 7 analog values, 3 binary inputs, 5 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP) BACnet points are writable?
12 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.
Where is the official Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP) BACnet documentation?
The source is RPC Series Room Pressure Sensor - Setup Guide BACnet Communication (SG-RPCXXXBAC), revision 2013-11-08 (PICS date), published free by Greystone Energy Systems at https://downloads.greystoneenergy.com/SG/SG-RPCXXXBAC.pdf.
What are the minimum BACnet points to integrate the Greystone Energy Systems RPC Series room pressure sensor (BACnet MS/TP)?
Start with AI 1 Pressure Sensor Value (Room differential pressure); BI 1 Alarm Status (Any pressure alarm); BI 2 Low Alarm Status (Low pressure alarm); BI 3 High Alarm Status (High pressure alarm).
How do I check these points on the real RPC Series room pressure sensor (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 Greystone Energy Systems BACnet points lists
- CO2 sensor / transmitter
Greystone Energy Systems CDD3 Series CO2 transmitter (BACnet MS/TP)
Greystone CDD3 series room CO2 transmitters with the BACnet MS/TP output, with optional RH, temperature, relay and setpoint.
Also known as: CDD3, CDD3A1XXXBAC, CDD3 BACnet, Greystone CDD3 CO2 - CO2 / RH / temperature sensor
Greystone Energy Systems CHT Series CO2 / RH / temperature sensor (BACnet MS/TP)
Greystone CHT series combined CO2, humidity and temperature sensors with the BACnet MS/TP output.
Also known as: CHT, CHTDT, CHTXXXBAC, Greystone CHT - Carbon monoxide (CO) gas sensor / transmitter
Greystone Energy Systems CMD Series CO transmitter (BACnet MS/TP)
Greystone CMD series carbon monoxide transmitters (model name CMD5B) with BACnet MS/TP, with optional relays, buzzer and temperature.
Also known as: CMD, CMD5B, CMDXXXBAC, Greystone CMD carbon monoxide - Room temperature / RH / differential pressure monitor
Greystone Energy Systems CR3 Series cleanroom monitor (BACnet MS/TP)
Greystone CR3 series cleanroom and critical-room monitors measuring temperature, humidity and room differential pressure, with BACnet MS/TP.
Also known as: CR3, CR3XXXBAC, CR3C, Greystone CR3 critical room monitor - Room dewpoint / humidity sensor
Greystone Energy Systems DPRC Series room dewpoint transmitter (BACnet MS/TP)
Greystone DPRC series room dewpoint transmitters (PICS model DPRCB) with BACnet MS/TP.
Also known as: DPRC, DPRCB, DPRCXXXBAC, Greystone room dewpoint sensor - Duct / outdoor dewpoint and humidity sensor
Greystone Energy Systems DW Series duct / outside air dewpoint transmitter (BACnet MS/TP)
Greystone DW series duct and outside-air dewpoint transmitters (PICS models DPDDB and DPODB) and HTX2 high-accuracy RH/T transmitters with BACnet MS/TP.
Also known as: DW, DPDDB, DPODB, DWXXXBAC, Greystone duct dewpoint sensor, HTX2, HTX2XXXBAC, Greystone HTX2 high accuracy humidity transmitter - Gas detector / sensor (CO and NO2)
Greystone Energy Systems GDT Series toxic gas detector, CO / NO2 (BACnet MS/TP)
Greystone GDT series toxic gas detectors with CO and/or NO2 sensors, relays, buzzer and strobe, using BACnet MS/TP (typical for parking garages).
Also known as: GDT, GDTXXXBAC, GS, Greystone CO NO2 gas detector, parking garage gas detector - Greenhouse CO2 / RH / temperature sensor
Greystone Energy Systems GH Series horticulture sensor (BACnet MS/TP)
Greystone GH series horticulture (greenhouse / grow room) sensors measuring temperature, humidity and CO2, with BACnet MS/TP.
Also known as: GH, GHXXXBAC, Greystone greenhouse CO2 RH temperature sensor - Greenhouse CO2 sensor
Greystone Energy Systems GO3 Series horticulture CO2 sensor (BACnet MS/TP)
Greystone GO3 series horticulture CO2 sensors (0-20,000 ppm) with optional temperature, RH and relay, using BACnet MS/TP.
Also known as: GO3, GO3 BACnet, Greystone GO3 greenhouse CO2 - Humidity / temperature sensor
Greystone Energy Systems HN Series humidity / temperature transmitter (BACnet MS/TP)
Greystone HN series humidity and temperature transmitters with BACnet MS/TP and an optional relay.
Also known as: HN, HNXXXBAC, Greystone HN humidity sensor - Humidity / temperature sensor with condensation monitoring
Greystone Energy Systems HTX1 Series rough duty RH / temperature transmitter (BACnet MS/TP)
Greystone HTX1 series rough-duty RH/temperature transmitters (PICS model DP0011) with optional pipe-temperature condensation probe, digital input and relay, using BACnet MS/TP.
Also known as: HTX1, HTX1XXXBAC, DP0011, NPI-56, Greystone rough duty sensor - Indoor air quality multi-sensor (CO2 / PM / VOC / formaldehyde)
Greystone Energy Systems IAQRM Series multi-sensor (BACnet MS/TP)
Greystone IAQRM series room multi-sensors (PICS model MSN) measuring temperature, RH, CO2, VOC, particulates and formaldehyde, with BACnet MS/TP.
Also known as: IAQRM, MSN, IAQRMXXXBAC, Greystone indoor air quality multi sensor - Room temperature / humidity sensor
Greystone Energy Systems NTRC Series temperature / humidity room sensor (BACnet MS/TP)
Greystone NTRC series network room sensors (temperature, optional RH, setpoint, fan switch, override, relay and digital input) with BACnet MS/TP.
Also known as: NTRC, NTRCXXXBAC, STAT, Greystone NTRC network room sensor - Particulate matter (PM2.5 / PM10) sensor
Greystone Energy Systems PM Series particulate matter transmitter (BACnet MS/TP)
Greystone PM series particulate transmitters for room, duct and outdoor mounting (PMRMC, PMDT, PMOS) with BACnet MS/TP.
Also known as: PM Series, PMRMC, PMDT, PMOS, PMXXXBAC, Greystone particulate sensor - Ultra-low differential pressure sensor / transducer
Greystone Energy Systems UP Series ultra-low pressure transducer (BACnet MS/TP)
Greystone UP series ultra-low differential pressure transducers with BACnet MS/TP.
Also known as: UP, UPB, UPXXXBAC, Greystone ultra low differential pressure - VOC air quality sensor
Greystone Energy Systems VOC Series air quality transmitter (BACnet MS/TP)
Greystone VOC series room air quality transmitters (VOC with RH and temperature) with BACnet MS/TP and optional relay.
Also known as: VOC Series, VOCXXXBAC, Greystone VOC sensor, Greystone TVOC transmitter
Source: RPC Series Room Pressure Sensor - Setup Guide BACnet Communication · SG-RPCXXXBAC · rev. 2013-11-08 (PICS date). Object names, instances and units are reproduced as published; descriptions are our own.