BUPN - duct pressure MP/Modbus/BACnet | TROX GmbH
BUSN__img_01png.png
XF4_gc_05svg.svg.link

Duct pressure control - static transducer

Bussystem_MP-Bus_imgpng.png
Bussystem_BACnet_imgjpg.jpg
Bussystem_Modbus_imgpng.png
BUSN__img_01png.png
XF4_gc_05svg.svg.link
Bussystem_MP-Bus_imgpng.png
Bussystem_BACnet_imgjpg.jpg
Bussystem_Modbus_imgpng.png

BUPN  

Control component with static transducer and separate actuator for VAV terminal units for duct pressure control

Universal device for use with VAV terminal units

  • Controller and static differential pressure transducer in one casing
  • Separate actuator with simple plug connection
  • Use in ventilation and air conditioning systems, with clean and contaminated air
  • Duct pressure control up to 450 Pa, e.g. duct pressure control
  • Constant value control Δpmin or variable control Δpmin – Δpmax
  • Operating parameters Δpmin and Δpmax are set in the factory and saved in the controller
  • Activation of override controls via external wiring
  • Modification of operating parameters by PC software as well as smartphone and tablet app (TROX FlowCheck app)
  • Service access for PC configuration software
  • Smartphone access via NFC interface and Bluetooth
  • Setpoint value settings, override controls and parameter adjustment via analogue interface or bus communication
  • High data transparency through standardised bus communication Modbus RTU, BACnet MS/TP or MP bus 

 


Product successfully added to cart

General information

Application

  • All-in-one control engineering device for VAV terminal units for duct pressure control up to 450 Pa in ventilation and air conditioning systems
  • Static differential pressure transducer and controller electronics combined in one casing
  • Separate actuator with prefabricated connection plug
  • For use with clean and contaminated air
  • Variable duct pressure control by presetting setpoint values via communication interfaces or analogue signal e.g. from the central building management system
  • Duct pressure control with constant value through a set operating value
  • Override controls for activating Δpmax, Δpmin, shut-off, control stop, OPEN position via Modbus/BACnet register or partly with switch or relay possible
  • Duct pressure actual value is available as network data point or linear voltage signal
  • Damper blade position is available as a network data point
  • Use TROX FlowCheck app and PC tool to configure the controller and the communication parameters


Control strategy

  • Duct pressure fluctuations are compensated, e.g. due to changing volume flow rate requirements
  • To prevent the control from becoming unstable, a dead band is allowed within which the damper blade does not move.
  • Δpmin: selected operating value of minimum duct pressure or constant value

  • Δpmax: selected operating value of maximum duct pressure

  • Operating parameters are specified via the order code and set in the factory


Interface

Analogue interface



  • Analogue interface with adjustable signal voltage range
  • Analogue signal for pressure setpoint value
  • Analogue signal for actual pressure value


Digital communication interface (Bus)



  • Modbus RTU, RS485
  • BACnet MS/TP, RS485
  • MP bus
  • Data points, see bus lists


Hybrid mode



  • Mixed mode of analogue and digital interface


Factory setting



  • Setpoint value setting via analogue interface
  • Actual value output via analogue interface and Modbus communication interface


Operating modes

Variable operation (V)



  • Setpoint value setting via analogue signal, Modbus, BACnet or MP-Bus
    Work area corresponds to Δpmin – Δpmax


Constant value mode (F)



  • A setpoint signal is not required, setpoint value corresponds to Δpmin


Operating parameters

  • Nominal pressure ΔpNom = 500 Pa
  • Volume flow rate range in the controller set in the factory
    Δpmin: minimum pressure, 0 – 100 % of ΔpNom  adjustable
    Δpmax: maximum pressure, 20 – 100 % of ΔpNom adjustable 
  • Reference point for the output signal: ΔpNom
  • Δpmin and Δpmax at factory up to 90 % from ΔpNom adjustable, so that adjustment behaviour is fully visible in the output signal
  • Note the adjustable duct pressure range from 25 - 450 Pa


Signal voltage ranges

  • 0 – 10 V DC
  • 2 – 10 V DC


Parts and characteristics

  • Transducer for static measurement principle
  • Separate overload protection
  • Plug-in terminal for supply line and controls including cover
  • Socket for the actuator
  • NFC and service interface
  • Release button to allow for manual operation
  • Indicator lights for displaying the operating mode
  • Addressing key for setting user addresses in bus mode
  • Controller casing prepared with 4 openings for threaded connections, 2 cable glands M16x1.5 for connecting cable in the supply package
  • Duct pressure tapping set with duct pressure tapping nipple and measuring hose included in delivery
  • Controller casing can be opened without tools


Construction

BUPN with actuator LM24A-VST for:



  • TVR, TZ-Silenzio, TA-Silenzio, TVZ, TVA
  • TVRK up to nominal size 250


BUPN with actuator NM24A-VST for:



  • TVJ 
  • TVT up to dimensions 1000 × 300 or 800 × 400
  • TVRK nominal size 315 – 400


BUPN with actuator SM24A-VST for:



  • TVT from dimensions of 800 × 500 to 1000 × 600


Commissioning

  • Due to the factory set duct pressure operating values, it must always be ensured that the control units are only installed at the points provided
  • Modbus/BACnet/MP bus interface: additional commissioning steps required
  • Operating parameters can be adjusted using the TROX FlowCheck app


Useful additions

  • Smartphone app for Android and iOS
  • Adjustment device type ZTH-EU (order code AT-VAV-B)  
  • Belimo PC-Tool
  • NFC Bluetooth converter ZIP-BT-NF

Technical information

Function, Specification text, Order code

  • Function
  • SPECIFICATION TEXT
  • ORDER CODE
Principle of operation Universal controller for duct pressure control: TVR, TVJ, TVT, TZ-/TA-Silenzio, TVZ, TVA, TVRK BUPN_gc_03ai.png

① Differential pressure transducer
② Actuator
③ Differential pressure controller
④ Setpoint value signal or programmed fixed constant value
⑤ Duct pressure tapping point
⑥ Differential pressure sensor of the VAV terminal unit (unused, depending on types and variant possibly not accessible or not available)
⑦ Differential pressure connection at the transducer of the control component, depending on the installation situation (supply air/exhaust air):

  • One connection side for duct pressure measurement - see ⑤
  • Other connection side open as reference value

Application area duct pressure controller (string pressure controller)

The ventilation planning of a larger building often requires an extensive duct network in which individual areas of the building are supplied via side ducts of the main duct. Sufficient air supply to the various side ducts must be ensured in all (use-dependent) operating situations, so that the planned ventilation of the respective zones or rooms is guaranteed by the volume flow controllers used.

In the easiest implementation, (high) volume flow rates are reduced here exclusively by terminal volume flow controllers in the zones or rooms. In this way, high pressure differences can be reduced close to the room - but this leads to acoustic and control engineering disadvantages.

A sensible alternative is to regulate the air demand of the side duct with an additional control unit according to demand and thus to run in the duct only as much differential pressure as is really necessary to supply the volume flow controllers in this duct. This means that only small pressure differences need to be adjusted at the terminal volume flow controllers, which benefits the accuracy and acoustic performance.

The use of volume flow controllers is not possible for this purpose. In the case of series-connected volume flow controllers in a line and zone or in a room, only one controller takes over volume flow control at a time (limiting variable) - all others are in the OPEN position. In this way only a volume flow limitation is realised.

Duct pressure controllers should always be used where parallel ducts have different static pressure requirements. To ensure that sufficient pressure is always available as required and to avoid unnecessary throttling, the static pressure in the individual air duct sections / ducts should be regulated. The duct pressure controller is set so that it regulates the duct pressure only to the same level that the volume flow controllers can operate and the outlet resistances in the zones behind them are overcome. Overall, the use of a duct pressure controller in the line and the use of a terminal volume flow controller for zone or room leads to a more stable system performance that is improved acoustically and energetically.

 

Functionality of a duct pressure controller

A static differential pressure transducer converts the duct pressure into an electrical voltage signal. The differential pressure actual value is available as a voltage signal. The factory setting is such that 10 V DC always corresponds to the nominal differential pressure (ΔpNom). The differential pressure setpoint value is either a constant value or it comes from a setpoint adjuster or from switch contacts. The controller compares the differential pressure setpoint value to the actual value and controls the actuator accordingly. Differential pressure parameters and signal voltage range are stored in the control component. Changes made by the customer can easily be made with the TROX FlowCheck App, adjustment device or a notebook.


Category

  • Universal controller for duct pressure


Application

  • Control of a constant or variable duct pressure setpoint.
  • Electronic controller for applying a reference variable and tapping an actual value signal.
  • The actual value signal relates to the nominal pressure such that commissioning and subsequent adjustment are simplified.
  • Stand-alone operation or integration in central building management system.


Area of application

  • Duct pressure control for ventilation and air conditioning systems in the range of 25-450 Pa (Static transducer integrated)


Actuator

  • Actuator slow-running; Running time 120 s for 90°


Installation orientation

  • Either direction


Connection

  • Pluggable connection terminals; no additional terminal box required


Supply voltage

  • 24 V AC/DC


Interface/signalling

Analogue signal:



  • 0 – 10 V DC or 2 – 10 V DC,


Bus interface:



  • Modbus RTU
  • BACnet MS/TP
  • MP bus


Interface information

Analogue signal:



  • Duct pressure, setpoint and actual value


Bus interface: 



  • Duct pressure, setpoint and actual value
  • Damper blade position
  • ​​​​​​​Fault status


System connections

MP-Bus for optional extensions



  • Gateways for LonWorks, Modbus, BACnet, KNX e.g. Belimo UK24xxx
  • Fan optimiser e.g. Belimo COU24-A-MP


Special functions

  • Activation Δpmin, Δpmax, Closed, Open, Control Stop by means of external switch contacts/wiring or bus communication


Parameter setting

Parameters specific to VAV terminal unit set at the factory



  • Nominal pressure factory set
  • Operating values Δpmin, Δpmax factory set
  • Signal characteristic factory set


Subsequent adjustment possible with



  • TROX FlowCheck app (NFC or Bluetooth with optional adapter)
  • PC software


Factory condition

  • Electronic controller factory set on control unit
  • Factory setting, certified with sticker
  • Controller in OPEN position
  • Duct pressure tapping set with duct pressure tapping nipple and measuring hose included in delivery

TVRD / 200 / D2 / BUPN / PDS / V0 / PminPmaxPa
|||||||||
12567891010

1 Type
TVR VAV terminal unit 

2 Acoustic cladding
No entry: none
D with acoustic cladding 

3 Material
Galvanised sheet steel (Standard construction)
P1 Powder-coated RAL 7001, silver grey
A2 Stainless steel construction 

4 Duct connection
 

5 Nominal size [mm]
100, 125, 160, 200, 250, 315, 400 

6 Accessories

No entry: none
D2 Double lip seal both sides
G2 Matching flanges for both ends

7 Attachments (control component)
BUPN Universal controller for duct pressure (VARYCONTROL) 

8 Equipment function/Installation location
PDE Duct pressure control, extract air
PDS Duct pressure control, supply air

9 Operating mode
F Constant value (a setpoint value)
V variable (setpoint value range) 

10 Signal voltage range

0 0 – 10 V DC
2 2 – 10 V DC 

11 Operating values for factory setting
Duct pressure in [Pa]
Δpconst (only with operating mode F)
Δpmin (only with operating mode V)
Δpmax (only with operating mode V)

Order example: TVR/100/D2/BUPN/PDS/V0/50-350 Pa
Acoustic claddingNone
Materialgalvanised sheet steel
Nominal size100 mm
AccessoriesDouble lip seal both sides
AttachmentVARYCONTROL Universal controller duct pressure, static transducer
Equipment function/installation locationDuct pressure control, supply air
Operating modevariable operation – signal voltage range 0 – 10 V DC
Operating valuesΔpmin = 50 PaΔpmax = 350 Pa

Variants, Product details

  • VARIANTS
  • PRODUCT DETAILS


Digital communication interface
 

An on-site changeover using the smartphone app is necessary for a setpoint specification via the bus interface. The bus interface can be set to Modbus, BACnet or MP-Bus. For smooth data exchange in the on-site bus network, the communication parameters and user address must be set for the bus interface. The communication parameters for the bus systems (address, baud rate etc.) can be set using the smartphone app. The interface provides standardised bus register/object access to the available data points.

 

Setpoint value setting

  • In the operating mode Modbus RTU (factory setting), the setpoint value is only set by specifying the volume flow rate set point value [%] in the Modbus register 0.
  • The transferred percentage value refers to the volume flow rate range specified by qvmin  –  qvmax fixed volume flow rate range.
  • Volume flow rate range qvmin –  qvmax pre-set in the factory according to the order code entries.
  • Subsequent adjustment of qvmin  or qvmax  possible using service tool smartphone app or Modbus/BACnet interface.

 

Actual value as feedback for monitoring or tracking control

  • The actual values can be read off in m³/h (factory setting) in both Modbus and BACnet. Other units such as m³/s, l/s, l/min, l/h, gpm, cfm possible.
  • In addition to the actual value of the volume flow rate, further information on the other Modbus registers/BACnet objects can be read out as well. Overview of registers/objects in the communication tables.
  • For diagnostic purposes, the volume flow rate actual value can be tapped at terminal 5 in bus mode.
    The volume flow rate range 0 – qvNom here always corresponds to the signal voltage range of (0)2 – 10 V DC.

 

Override control

For special operating situations, the volume flow controller can be put in a special operating mode (override control). The following are possible: control qvmin, control qvmax, damper blade in the OPEN position or damper blade CLOSED.

 

Override control via the bus

This is set via the Modbus register 1 or via BACnet object type MO[1].

 

Override control via bus timeout monitoring (Modbus)

If the Modbus communication fails for a stipulated time period, a pre-defined operating mode qvmin, qvmax, OPEN or CLOSED can be activated.

  • The override control to be activated upon bus timeout is specified via Modbus register 108 or 109 
  • The time period after which override control is activated upon bus timeout is specified via Modbus register 109 or 110 
  • Each Modbus communication resets the timeout of the bus timeout monitoring

 

Override control via bus timeout monitoring (Modbus)

If the BACnet communication drops out for a specified time period, a predefined operating mode can be activated.

  • The setpoint value to be activated upon bus timeout is specified via Relinquish_Default from SpRel (object AO1)
  • Bus timeout period is defined via BusWatchdog (object type AV [130])
  • Communication on the datapoints SpRel (Object AO[1] and Override (Object MO[1])

 

Override controls for diagnostic purposes

Activation via bus system, external switch contacts / switch contacts provided by others (jumpers), and smartphone app.

 

Prioritisation of various setting options

Settings for override controls via analogue are prioritised over Modbus/BACnet settings.

  • Highest priority: setting via an analogue override control 
  • Medium priority: settings via the service connector (smartphone app) for test purposes
  • Lowest priority: setting via Modbus/BACnet/MP-Bus 

 


Product details, Technical data

  • PRODUCT DETAILS
  • TECHNICAL DATA

Universal controller for VAV terminal units

Controller

Actuator

Order code detail

Part numberTypePart numberType

VAV terminal units

BUPNA00000073652VRU-M1-M/B TRA00000076423LM24A-VST TR


BUPNA00000073652VRU-M1-M/B TRA00000073640NM24A-VST TR


BUPNA00000073652VRU-M1-M/B TRA00000073642SM24A-VST TR



TVR, TZ-Silenzio, TA-Silenzio, TVZ, TVA

TVRK nominal size 125 – 250

TVJ, TVT up to dimensions of 1000 × 300 or 800 × 400

TVRK nominal size 315 – 400


TVT dimensions from 800 × 500 to 1000 × 600

 

 




Universal controller Type VRU-M1-M/B TR




Measurement principle




static transducer type, independent of position


Nominal pressure

500 Pa


Pressure control range

25 – 450 Pa


Nominal voltage

AC/DC 24 V
Nominal frequency50/60 Hz

Functional range

19,2 – 28,8 V AC oder 21,6 – 28,8 V DC


Power requirement (operation/resting state)




1.5 W


Power rating

2 VA plus connected VST drive


Power rating - note

Imax 20 A @ 5 ms


Actuator connection

AC/DC supply from controller, PP link VST drive 


Bus connection

Modbus RTU*, BACnet MS/TP, MP-Bus


Adjustable communication parameters with Modbus RTU

Baud rate: 9600, 19200, 38400*, 76800, 115200;

Address: 1*,2.3 – 247;

Parity: 1-8-N-2*, 1-8-N-1, 1-8-E-1, 1-8-O-1;

Number of nodes: max. 32 (without repeater)

Terminal resistor: 120 Ω;


Adjustable communication parameters with BACnet MS/TP

Baud rate: 9600, 19200, 38400*, 76800, 115200;

Address: 1*,2.3 – 127;

Number of nodes: max. 32 (without repeater)

Terminal resistor: 120 Ω;


Addressing

Required on-site: by Smartphone app


Setpoint value signal input (analogue optional)

0 – 10 V, 2 – 10 V
Input resistance 100 kΩ


IEC/EN protection classIII (protective extra-low voltage)
Protection levelIP 42

EMC

CE according to 2014/30/EU

* Factory setting.



 



Actuator LM24A-VST TR


Supply voltageFrom the controller
Power consumption – when running

1 W

Power rating

2 VA

Self-consumption (idle state)

0.4 W

Torque

5 Nm

Run time for 90°

120 s/90°

Setpoint value signal inputFrom the controller
IEC protection classIII (protective extra-low voltage)
Protection level

IP 54

EMC

EMC to 2014/30/EU
Weight

0.56 kg


 



Actuator NM24A-VST TR


Supply voltageFrom the controller
Power consumption – when running

2 W

Power rating

4 VA

Self-consumption (idle state)

0.4 W

Torque

10 Nm

Run time for 90°

120 s/90°

Setpoint value signal inputFrom the controller
IEC protection classIII (protective extra-low voltage)
Protection level

IP 54

EMC

EMC to 2014/30/EU
Weight

0.78 kg


 

 



Actuator SM24A-VST TR

Supply voltageFrom the controller
Power consumption – when running

2 W

Power rating

4 VA

Self-consumption (idle state)

0.4 W

Torque

20 Nm

Run time for 90°

120 s/90°

Setpoint value signal inputFrom the controller
IEC protection classIII (protective extra-low voltage)
Protection level

IP 54

EMC

EMC to 2014/30/EU
Weight

0.98 kg





Commissioning

  • On-site adjusting is not required
  • Due to the operating values set at the factory, it must always be ensured that the control units are only installed at the intended locations
  • Install control unit in the duct range to be controlled
  • Set up pressure tap for duct pressure

For supply air:

  • Connect the positive connection of the controller to the duct to be regulated
  • Leave the negative connection of the controller open

For extract air:

  • Leave the positive connection of the controller open
  • Connect the negative connection of the controller to the duct to be regulated
  • The duct must always be connection on the side remote from the fan
    • Note the duct pressure control range stipulated in the technical data
    • Establish electrical wiring connection
    • The controller is then ready for use
  • Only briefly remove the protective cap of the control component during wiring
  • For operation with the Modbus/BACnet/MP-Bus interface: additional commissioning steps such as user addressing and setting of the communication parameters are required
  • For operation with the MP-Bus interface in existing systems as a replacement for the VRP-M controller: activation of the VRP-M compatibility mode is required


Functional scope of service tools


Function/parameterisation

Smartphone app

PC-Tool

ZTH-EU

Adjustment Δpmin, Δpmax

R, WR, WR, W
Mode, control signals 0 – 10 V, 2 – 10 V DCR, WR, W
Setpoint value setting analogue, BusR, WR, W
Modbus, BACnetR, WR, W
MP busR, WR, W
Set bus parametersR, WR, W
Carry out override controls

No

NoNo
Trend display

Yes

Yes


 



Communication interface Modbus RTU

NumberRegister AddressDescriptionRange EnumerationUnitScalingAccess
1

Setpoint value between 


qvmin/Δpmin (reg. address 105) and


qvmax/Δpmax (reg. address 106)

(*1) (*2) (*3) (*4)

0 – 10,000

Factory setting: 0

%

0.01[R / W]
21

Override control


 


Overwrites the setpoint value with override control

0: None

1: OPEN

2: CLOSED

3: qvmin/Δpmin

5: qvmax/Δpmax

Factory setting: None

WR
32

Command triggering 


 


Triggering of functions for service and test purposes. Command ends automatically with 0


 

0: None

1: Adapting

3: Synchronisation

Factory setting: None 

WR
43

Type of actuator

 

(*5)

0: Actuator not connected/not known

1: Actuator Air/Water with/without safety function

2: Volume flow controller VAV/EPIV

3: Fire damper

4: Energy Valve

5: 6way EPIV

RD
54

Current damper blade position acc. to mechanical limits


 


(*5)

0 – 10,000

%

0.01RD
65

Blade angle acc. to angle range


 


(*5)

0 – 9,600

°

0.01RD
76

Relative volume flow rate related to qvnom (reg. address 110)


 


(*6)

0 – 15,000

%

0.01RD
87

Absolute volume flow rate

 

(*6)

0 – qvnom

m³/h

 

1RD
98

Sensor value (voltage, resistance, switch)


Value dependent on the setting of the sensor type (reg. address 107)

0 – 65,535

 

mV,


Ω,


0/1

0.1RD
109

-[–]
1110

Absolute volume flow rate in selected volume flow unit acc. to (reg. address 117)


 


(Low word) < 16 of 32 bit


 


(*6)

0 – 500,000,000

UnitSel

0.001RD
1211

Absolute volume flow rate in selected volume flow unit acc. to (reg. address 117)


 


(High word) > 16 of 32 bit


 


(*6)

0 – 500,000,000

UnitSel

0.001RD
1312

Analogue setpoint value 

 

Shows the setpoint value in % with analogue control input signal. Active if reg. address 118 = 0 (analogue)

0 – 10,000

%

0.01RD
5150

Relative differential pressure 


 


According to application case as per (reg. address 128)

0 – 20,000

%

0.01RD
5251

Absolute differential pressure

-1,000 – 15,000

[Pa]

0.1RD
5352

[–]
5453

Absolute differential pressure in selected unit (reg. address 145)


(Low word) < 16 of 32 bit

-10,000,000 – 100,000,000

UnitSel

0.001RD
5554

Absolute differential pressure in selected unit as per (reg. address 145) 


 


(High word) > 16 of 32 bit

-10,000,000 – 100,000,000 

UnitSel

0.001RD
10099

Bus terminal resistor 


 


Indicates whether the terminal resistor (120 Ω) is active or deactivated.


Can only be set using service tools.

0: Not active


1: Active


Factory setting: Not active

RD
101100

Serial number, part 1


Example: 00839-31324-064-008


1st part: 00839


2st part: 31324


3st part: 008

RD
102101

Serial number, part 2

RD
103102

Serial number, part 3

RD
104103

Firmware version

Example: 101, version 01.01.

RD
105104

Malfunctions and service information –


automatic reset if status has ceased

Bit 0: –

Bit 1: Mechanical travel too high

Bit2: Actuator cannot be moved (e.g. mechanical overload)

Bit 3: –

Bit 4: Error of dP sensor

Bit 5: Return air flow detected

Bit 6: Volume flow rate too low

Bit 7: Flow rate in closed position

Bit 8: Internal activity (e.g. test run, adaptation)

Bit9: Gear release active

Bit10: Bus monitoring triggered

Bit 11: Actuator not suitable for application

Bit 12: Pressure sensor incorrectly connected

Bit 13: Pressure sensor not reached

Bit 14: Error in dP sensor outside of measuring range

RD
106105

Setting work areas qvmin/Δpmin 


 


Requirements: qvmin/Δpmin < qvmax/Δpmax


Vmax in the area 0 – 100 % of qvnom/Δpnominal

0 – qvmax/Δpmax

 

%

0.01WR
107106

Setting work areas qvmax/Δpmax 

 

Requirements: qvmax/Δpmax < qvmin/Δpmin

Vmax in the area 20 – 100 % of qvnom/Δpnominal

2,000 10,000  

 

%

0.01WR
108107

Type of sensor 


 


If reg. address 118 = 0 (analogue), then reg. address 107 = 1 (active) for mV

0: None


1: Active


2: Passive


3: –


4: Switch


 


Factory setting: None

WR
109108

Bus timeout monitoring 

 

If there is a bus timeout, the actuator moves into a position specified here. 

The position is mech. limited, qvmin/Δpmin and qvmax/Δpmax have no impact.

Release if no change takes place in reg. address 1 or reg. address 2 in the specified time for reg. address 109.

Display of release in reg. address 104.

In hybrid mode, bus timeout activation is deactivated. 

 

 

Bus timeout time: acc. to reg. address 109

0 – 10,000

Factory setting: 0

%

0.01WR
110109

Time until release bus timeout monitoring

 

If reg. 108 ≠ 0, then the initial automatic status is reg. 108 = 120 s. 

0 – 3,600 


0: Inactive


Factory setting: Deactivated


 

s

1WR
113112

Nominal volume flow rate in selected volume flow unit acc. (reg. address 117)


 


(Low word) < 16 of 32 bit

0 – 60,000,000

UnitSel

0.001RD
114113

Nominal volume flow rate in selected volume flow unit acc. (reg. address 117)


 


(High word) > 16 of 32 bit

0 – 60,000,000

UnitSel

0.001RD
115114

[–]
116115

[–]
117116

Control mode

0: Position control (open loop)

1: Volume flow control

Factory setting: Volume flow control 

[R]
118117

Unit selection –


 


Unit selection for reg. address 11 and 12

0: –

1: m³/h

2: l/s

3: –

4: –

5: –

6: cfm

-

WR
119118

Setpoint value setting

 

If reg. address 118 = 0 (analogue), then reg. address 12 = active.

If reg. address 118 = 1 (Bus), then reg. address 1 = active.

 

0: Analogue (0 – 10 V, 2 – 10 V)

1: Bus (Modbus, BACnet, MP-Bus)

Factory setting: Analogue 

WR
120119

Pressure operating mode 

 

Only for VRU-M1R-M/B TR.

0: Negative pressure

1: Positive pressure

 

WR
121120

 

[–]
122121

[–]
123122

[–]
124123

Room pressure cascade release 

 

Only available if reg. address 124 = 0 (volume flow control) or 2 (room pressure control).

 

 

0: Inactive


1: Active


2: Active fast (only for VRU-M1R-M/B TR)

RD
125124

Applications

 

 

0: Volume flow control

1: Pressure control

2: Room pressure control

3: Flow measurement

RD
126125

Unit height

0 – 3,000

Factory setting: 0

m

1WR
127126

Nominal differential pressure in the selected unit as per (reg. address 145)

 

More info in (reg. address 128)

D3: 0 – 50000

M1: 0 – 60000

M1R: 0 – 60000

UnitSel

RD
128127

[–]
129128

Nominal differential pressure in Pa 

 

If reg. address 124 = 0 (volume flow control), then reg. address 110 as qvnom.

If reg. address 124 = 1 (differential pressure control) or 2 (room pressure control), then the maximum is defined by the diff. pressure.

D3: 0 – 500

M1: 0 – 600

M1R: 0 – 750

Pa

0.1RD
146145

Selection of the pressure unit 

 

The selected unit is displayed in (reg. address 126).

0: Pascal


1: –


2: Water column


Factory setting: Pascal 

[–]

RD = Register can only be read
WR = Register can be read and written


(*1) If reg. address 118 = 1 (Bus), then reg. address 0 = active.

(*2) If reg. address 124 = 0 (volume flow control), then reg. address 0 = volume flow rate

(*3) If reg. address 124 = 0 (volume flow control) and reg. address 116 = 0 (position control), then reg. address = damper blade position

(*4) If reg. address 124 = 1 (differential pressure control) or 2 (room pressure control), then reg. address = pressure

(*5) If reg. address 124 = 2 (room pressure control) or 3 (volume flow rate measurement), then reg. address = deactivate 65535

(*6) If reg. address 124 = 1 (differential pressure control) or 2 (room pressure control), then reg. address = deactivate 65535



 


Protocol Implementation Conformance Statement – PICS (general information)

Date

2020-06-11

Vendor nameTROX GmbH
Vendor ID

329

Product nameVRU-D3-BAC, VRU-M1-BAC, VRU-M1R-BAC
Product model numberVRU – BAC
Application software version

01.02.0001

Firmware revision

10.02.0000

BACnet Protocol Revision

12

Product descriptionController for VAV/CAV and pressure applications
BACnet Standard Device ProfileBACnet Application Specific Controller (B-ASC)
BACnet Interoperability Building Blocks Supported

Data Sharing – ReadProperty-B (DS-RP-B)
Data Sharing – ReadPropertyMultiple-B (DS-RPM-B)
Data Sharing – WriteProperty-B (DS-WP-B)
Data Sharing – WritePropertyMultiple-B (DS-WPM-B)
Data Sharing – COV-B (DS-COV-B)
Device Management – DynamicDeviceBinding-B (DM-DDB-B)
Device Management – DynamicObjectBinding-B (DM-DOB-B)
Device Management – DeviceCommunicationControl-B (DM-DCC-B)

Segmentation CapabilityNo
Data Link Layer OptionsMS/TP master, baud rates: 9600, 19200, 38400, 76800, 115200
Device Address BindingNo static device binding supported
Networking OptionsNone
Character Sets SupportedISO 10646 (UTF-8)
Gateway OptionsNone
Network Security OptionsNon-secure device


 



Object processing

Object type

Optional properties

Writeable properties

Analogue input [AI]

Description
COV Increment

COV Increment

Analogue Output [AO]

Description
COV Increment

Present Value
COV Increment
Relinquish Default

Analogue Value [AV]

Description



COV Increment

Present Value



COV Increment

Binary Input [BI]

Description
Active Text
Inactive Text

Device

Description
Location
Active COV Subscriptions
Max Master
Max Info Frames
Profile Name

Object Identifier
Object Name
Location
Description
APDU Timeout (1000 – 60000)
Number Of APDU Retries (0 – 10)
Max Master (1 – 127)
Max Info Frames (1 – 255)

Multi-state Input [MI]

Description
State Text

Multi-state Output [MO]

Description
State Text

Present Value
Relinquish Default

Multi-state Value [MV]

Description
State Text

Present Value (if marked)


Processing of services

  • The device does not support the services "Create object" and "Delete object"
  • The specified maximum length of the writable character strings is based on single-byte characters
  1. Object name 32 characters
  2. Location 64 characters
  3. Description 64 characters
  • The device supports the DeviceCommunicationControl Services, no password necessary
  • A maximum of 6 active COV subscriptions with a run time of 1 – 28800 s (maximum of 8 h) is supported


 


Communication interface BACnet MS/TP


Object NameObject TypeDescriptionValuesCOV IncrementAccess
Device

Device [Inst.No]

0 – 4,194,302

Factory setting: 1

WR
RelPosAI[1]

Damper blade position in %

 

Status flags: (*1), (*2)

0 – 100

0.01 – 100

Factory setting: 1

RD
AbsPosAI[2]

Absolute position in ° 

Angular position corresponding to the entire rotation range.

 

Status flags: (*1), (*2)

 

0 – max. angle

0.01 – 90

Factory setting: 1

RD
SpAnalogueAI[6]

Analogue setpoint value in %

Shows the analogue setpoint value according to the selected application flow rate, pressure, damper blade position as per ApplicationSel MV[2]. 
If setpoint value setting in SpSource MV[122] = 1 (analogue), then SpAnalog AI[6] = active.
The analogue setpoint value is limited by Min AV[97] and Max AV[98].
 

 

Status flags: (*1), (*3)

 

0 – 100

0.01 – 100

Factory setting: 1

RD
RelDeltaP

AI[9]

Relative differential pressure in % with respect to DeltaPnom_Pa AV[122]

 

 

0 – 150

0.01 – 150

Factory setting: 1

RD
RelFlowAI[10]

Relative volume flow rate in % related to Vnom_m3h AV[112]

 

Status flags: (*4)

0 – 150

0.01 – 150

Factory setting: 1

RD
AbsFlow_m3h

AI[12]

Absolute volume flow rate in m³/h

 

Status flags: (*4)

0 – 60,000

 

1 – 60,000

Factory setting: 10

RD
DeltaP_UnitSel

AI[18]

Absolute differential pressure in selected unit as per UnitSelPressure MV[127]

-10,000 – 100,000

0.001 – 100,000

Factory setting: 1

RD
AbsFlow_UnitSelAI[19]

Absolute volume flow rate in selected unit as per UnitSelAirFlow MV[121]

 

Status flags: (*4)

 

0 – 500,000

0.01 – 500,000

Factory setting: 1

RD
Sens1AnalogueAI[20]

Sensor 1 as analogue value 
 

If Sensor1Type MV[220] = 2 (active), then display = analogue value in 0 – 10 V.

If Sensor1Type MV[220] = 3 (passive), then display = resistance value.

If RmPCascade MV[10] = 2 (enabled) or 3 (quickly enabled), then the sensor input is not available. 
 

Status flags: (*5)

 

0 – 65535

0.01 – 1000

Factory setting: 1

RD
DeltaP_Pa

AI[29]

Absolute differential pressure in Pa

0 – 600

0.01 – 600

Factory setting: 10

RD
SpRelAO[1]

Relative setpoint value in % 

 

The rel. setpoint value depends on the application (flow rate/pressure/damper blade position).
If SpSource MV[122] = 2 (bus), then SpRel AO[1] = active.
The analogue setpoint value is limited by Min AV[97] and Max AV[98].

 

Status flags: (*1), (*2)

0 – 100

Factory setting: 0

0.01 – 100

Factory setting: 1

C
MinAV[97]

Minimum setpoint value in % (qvmin/Pmin)

 

Requirement:

qvmin/Δpmin < qvmax/Δpmax

qvmin/Δpmin in the range 0 - 100 & qvnom/Δpnom

0 – qvmax/Δpmax

 

0.01 – 100

Factory setting: 1

WR
MaxAV[98]

Maximum setpoint value in % (qvmax/Pmax)

 

Requirement:

qvmax/Δpmax > qvmin/Δpmin

qvmax/Pmax in the range 20 - 100 % of qvnom/Pnom

qvmin/Δp – 100

 

0.01 – 100

Factory setting: 1

WR
Vnom_m3h

AV[112]

Nominal volume flow rate in m³/h

0 – 50,000

0.01 – 50,000

Factory setting: 1

RD
Vnom_UnitSel

AV[119]

Nominal volume flow rate in selected unit as per UnitSel MV[121]

 

0 – 250,000

0.01 – 1,000:

Factory setting: 1

RD
SystemAltitude

AV[120]

System altitude in metres above sea level

0 – 3,000

 

1 – 3,000

Factory setting: 10

WR
DeltaPnom_Pa

AV[122]

Nominal differential pressure in Pa 

 

The nominal differential pressure depends on the selected pressure sensor (D3, M1, M1R).

Depending on the selected application, the nominal differential pressure serves as dp@Vnom or as the maximum pressure limitation

If ApplicationSel MV[2] = 1 (flow control), then display = nominal differential pressure

If ApplicationSel MV[2] = 2 (pressure control) or 3 (room pressure control), then display = max. pressure limitation

 

D3: 0 – 500

M1: 0 – 600

M1R: 0 – 75

1 – 600

Factory setting: 1

RD
DeltaPnom_UnitSel

AV[129]

Nominal differential pressure in selected unit as per UnitSelPressure MV[127]

 

More infos: see AV[122].

 

 

0.01 – 1000

Factory setting: 1

RD
BusWatchdogAV[130]

Time until the release bus timeout monitoring in s 


If BusWatchdog AV[130] ≠ 0, then monitoring of SpRel AO[1] and override MO[1] for change.
If changes in SpRel AO[1] and override MO[1], then reset the bus timeout monitoring. 
If SpSource MV[122] = 1 (analogue), then BusWatchdog AV[130] only takes account of override MO[1].  

0 – 3600 s

Factory setting: 0 (bus timeout monitoring deactivated)

0.01 – 1000

Factory setting: 1

WR
Sens1SwitchBI[20]

Switch status of the switch at the sensor input 

 

If SenType MV[220] = 5 (switch), then Sens1Switch BI[20] = active.

 

Status flags: (*6)

 

 

0: Inactive

1: Active

RD
BusTerminationBI[99]

Terminal resistor 

 

Shows whether the terminal resistor (120 Ω) has been activated via the service tools.

 

0: Deactivated

1: Activated

RD
SummaryStatusBI[101]

Condensed status 


Groups together the status of the objects: 

"StatusSensor" MI[103] 
"StatusFlow" MI[104] 
"StatusActuator" MI[106] 
"StatusPressure" MI[109] 
"StatusDevice" MI[110]  

Not equal to 1: OK

1: Not OK

RD
RmPCasacade

MV [10]

Room pressure cascade 

 

If RmPCascade MV[10] = 2 (active) or 3 (active fast), then sensor1 is the input for the room cascade (0 – 10 V).

If ApplicationSel MV[2] =1 (volume flow control) or 3 (room pressure control), then RmPCascade MV [10] = active.

 

Status flags: (*7)

1: Inactive

2: Active

3: Active fast (for M1R only) 

RD
InternalActivity

MI[100]

Internal status 

 

1: None

2: –

3: Adaption

4: Synchronisation

RD
StatusSensor

MI[103]

Status of the differential pressure sensor 

If status end = automatic reset

1: OK

2: dP sensor not OK

3: dP sensor outside of measuring range

4: dP sensor incorrectly connected

RD
StatusFlow

MI[104]

Volume flow rate status 


If there is no volume flow rate within 600 s, then StatusFlow MI[104] = 3.

1: OK

2: –

3: No airflow detected

RD
StatusActuator

MI[106]

Status of the actuator 

 

Status flags: (*2)

1: OK

2: Actuator cannot be moved

3: Gear release active

4: Mechanical travel exceeded

5: Actuator not suitable for application

 

RD
StatusPressure

MI[109]

Differential pressure status 

 

If the differential pressure is not reached within 180 s, then StatusPressure MI[109] = 3.

1: OK

2: –

3: Pressure not reached

RD
StatusDevice

MI[110]

Status of the device during bus monitoring 


According to BusWatchdog AV[130].

1: OK

2: Bus timeout monitoring activated

RD
Override

MO[1]

Override control 

 

Overwrites the setpoint value with a forced command.

 

Status flags: (*8)

1: None

2: OPEN

3: CLOSED

4: qvmin/Δpmin

5: –

6: qvmax/Δpmax

Factory setting: None (1)

C
ApplicationSel

MV[2]

Display of application 

 

VRU-D3-M/B TR, VRU-M1-M/B TR

- Flow control
- Pressure control
- Flow measurement

 

VRU-M1R-M/B TR
- Room pressure control

 

1: Flow control

2: Pressure control

3: Room pressure control

4: Flow measurement

RD
ControlMode

MV[100]

Control mode

 

Status flags: (*9)

1: PosCtrl

2: FlowCtrl

Factory setting: FlowCtrl

RD
OperationMode

MV[102]

Operating mode 

 

Only relevant for VRU-M1R-BAC.

 

Status flags: (*10)

1: Negative pressure

2: Positive pressure

WR
Command

MV[120]

Release test functions

 

Status flags: (*2)

1: None

2: Adaption

3: –

4: Reset

Factory setting: None 

WR
UnitSelAirFlow

MV[121]

Selection of the volume flow unit 

 

The selected unit is indicated in AI[19] and AV[104]

1: –

2: m³/h

3: l/s

4: –

5: –

6: –

7: cfm

 

WR
SpSource

MV[122]

Selection of the setpoint value setting 

 

If SpSource MV[122] = 1 (analogue), then SpAnalog AI[6] = active.

If SpSource MV[122] = 2 (bus), then SpRel AO [1] = active.

1: Analogue (0 – 10 V, 2 – 10 V)

2: Bus (Modbus, BACnet, MP-Bus)

Factory setting: Analogue

WR
UnitSelPressure

MV[127]

Selection of the pressure unit

 

The selected unit is indicated in DeltaP_UnitSel AI[18] and DeltaPnom_UnitSel AV[129].

1: Pascal

3: Water column

Factory setting: pascal 

WR
UnitSelTemp

MV[128]

Selection of temperature unit

The selected unit is located in AI[20].

1: K

2: °C

3: °F

Factory setting: °C (2)

W
Sens1Type

MV[220]

Definition of the sensor type 

 

If Sens1Type MV[220] = 2 (active) or 3 (passive), then Sens1Analog AI[20] active.

If Sens1Type MV [220] = 5 (switch), then Sens1Schalter BI[20] active. 

 

1: None

2: Active sensor (in hybrid mode)

3: Passive sensor 

4: –

5: Switch

Factory setting: None 

WR

RD = Register can only be read
WR = Register can be read and written
C = Commendable with priority array


Status flags: 


(*1) If the gear latch is pressed, then Overridden = 1


(*2) If ApplicationSel MV[2] = 3 (room pressure control) or 4 (flow measurement), then Out of Service = 1


(*3) If SpSource MV[122] = 2 (Bus), then Out of Service = 1


(*4) If ApplicationSel MV[2] = 2 (pressure control) or 3 (room pressure control), then Out of Service = 1


(*5) If Sens1Type MV[220] = 1 (none), then Out of Service = 1


(*6) If Sens1Type MV[220] ≠ 5, then Out of Service = 1


(*7) If ApplicationSel MV[2] = 2 (pressure control) or 4 (flow measurement), then Out of Service = 1


(*8) If ApplicationSel MV[2] = 4 (flow measurement), then Out of Service = 1


(*9) If ApplicationSel MV[2] ≠ 1 (volume flow control), then Out of Service = 1


(*10) If ApplicationSel MV[2] ≠ 3 (room pressure control), then Out of Service = 1

Downloads

product information

certificates

production {"X-Frame-Options"=>"SAMEORIGIN", "X-XSS-Protection"=>"1; mode=block", "X-Content-Type-Options"=>"nosniff", "X-Download-Options"=>"noopen", "X-Permitted-Cross-Domain-Policies"=>"none", "Referrer-Policy"=>"strict-origin-when-cross-origin", "Content-Security-Policy"=>"frame-ancestors 'self' https://*.scrivito.com https://punchoutcommerce.com https://www.trox.de https://trox-extern.com https://*.onventis.com http://localhost:63342 http://cerebrum.local", "Strict-Transport-Security"=>"max-age=31536000; includeSubDomains", "Content-Type"=>"text/html; charset=utf-8"}

Share page

Recommend this page

Recommend this page by sending a link by mail.

Fields marked with an (*) are required fields.

Share page

Thank you for your recommendation!

Your recommendation has been sent and should arrive shortly.

Contact

We are here for you

Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265

Contact

We are here for you

Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265

Attachment (max. 10MB)

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265