BUDN

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X-AIRCONTROL zone module MP bus

CONTROL COMPONENT WITH DYNAMIC TRANSDUCER AND SEPARATE ACTUATOR FOR VAV TERMINAL UNITS

Universal device for use with VAV terminal units

Controller and dynamic differential pressure transducer in one casing
Separate actuator with simple plug connection
Use in ventilation and air conditioning systems, only with clean air
Suitable for constant and variable volume flow rates
Activation of override controls via external wiring
Volume flow rates qvmin and qvmax are set in the factory and saved in the controller
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 MP-Bus, Modbus RTU or BACnet MS/TP

General information

Application

All-in-one control device for VAV terminal units
Dynamic differential pressure transducer and control electronics in one casing
Separate actuator with prefabricated connection plug
For use only with clean air
Standard filtration in comfort air conditioning systems allows for use of the controller in the supply air without additional dust protection.
Suitable for different control tasks depending on the specification of the setpoint value
The room temperature controller, central BMS, air quality controller or similar units control the variable volume flow control by specifying the setpoint values via a communication interface or analogue signal
Override controls for activating qvmin, qvmax, shut-off, OPEN position via MP-Bus data points or Modbus/BACnet register or switch/relay possible
Volume flow rate actual value is available as a 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

With heavy dust levels in the room

Install appropriate exhaust air filters upstream, as a partial volume flow is routed through the transducer for volume flow rate measurement.

If the air is additionally contaminated, e.g. with fluff or sticky components

Use of the BUSN attachment group instead of the BUDN universal controller described here

Control concept

The volume flow controller works independent of the duct pressure
Differential pressure fluctuations do not result in permanent volume flow rate changes
To prevent the control from becoming unstable, a dead band is allowed within which the damper blade does not move.
Volume flow rate range in the controller set in the factory
qvmin: minimum volume flow rate
qvmax: maximum volume flow rate
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 volume flow rate setpoint
Analogue signal for actual volume flow rate

Digital communication interface (Bus)

MP bus
Modbus RTU, RS485
BACnet MS/TP, RS485
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 qvmin – qvmax

Constant value mode (F)

A setpoint signal is not required, setpoint value corresponds to qvmin

Operating parameters

Volume flow rate range in the controller set in the factory
qvmin: minimum volume flow rate
qvmax: maximum volume flow rate
qvmin = 0 – 100 % of the nominal volume flow rate qvnom adjustable
qvmax= 20 – 100 % of the nominal volume flow rate qvenn adjustable

Signal voltage ranges

0 – 10 V DC
2 – 10 V DC

Parts and characteristics

Transducer for dynamic 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

Construction
BUDN with actuator LM24A-VST for:

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

BUDN with actuator NM24A-VST for:

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

BUDN with actuator SM24A-VST for:

TVT from dimensions of 800 × 500 to 1000 × 600

Commissioning

Due to the volume flow rates set in the factory, always ensure that the control units are only installed in the specified locations
Modbus/BACnet/MP bus interface: additional commissioning steps required
Operating parameters can be adjusted using the TROX FlowCheck app

Useful additions

TROX FlowCheck app for Android and iOS
Adjustment device type ZTH-EU (order code AT-VAV-B)
Belimo PC-Tool
NFC Bluetooth converter ZIP-BT-NF
X-AIRCONTROL zone modules for room control

Technical information

Principle of operation Universal controller: TVR, TVJ, TVT, TZ-/TA-Silenzio, TVZ, TVA, TVRK XD4_gc_01ai.ai.link

① Differential pressure transducer

② Actuator

③ Volume flow controller

④ Setpoint value signal

A closed control circuit for regulation of the volume flow rate, i.e. measuring - comparing - adjusting, is characteristic of air terminal units.
The volume flow rate is measured by measuring a differential
pressure (effective pressure). This is done via a differential
pressure sensor. An integrated differential pressure transducer converts the effective pressure into a voltage signal.

The volume flow rate actual value is available as a voltage signal. The factory setting is such that an actual output signal of 10 V DC always corresponds to the nominal volume flow rate (qvnom). The volume flow rate setpoint value is specified by a higher-level controller (e.g. room temperature controller, air quality controller, central BMS). Variable volume flow control results in a value between qvmin and qvmax. It is possible to override the room temperature control by override controls, e.g. by a complete shutoff of the duct. The controller compares the volume flow rate setpoint value to the actual value and controls the external actuator accordingly to the system deviation.

This specification text describes the general properties of the

product.

Category

Universal controller for volume flow rate

Application

Control of a constant or variable volume flow rate setpoint
Electronic controller for connecting a controlled variable and tapping an actual value signal
The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
Stand-alone operation or integration in central building management system

Area of application

Differential pressure transducer with dynamic measuring principle for clean air in ventilation and air conditioning systems

Actuator

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

Installation orientation

Either direction

Connection

Pluggable connection terminals; no additional terminal box required

Supply voltage

24 V AC/DC

Interface/Control
Analogue signal

0 – 10 V DC or 2 – 10 V DC

Bus interface

MP bus
Modbus RTU
BACnet MS/TP

Interface information
Analogue

Volume flow rate setpoint and actual value

Bus interface

Volume flow rate setpoint and actual value
Damper blade position
Fault status

System connections

MP-Bus for optional extensions
Suitable for TROX X-AIRCONTROL zone module X-AIRZMO-MP
Gateways for LonWorks, Modbus, BACnet, KNX e.g. Belimo UK24EIB
Fan optimiser, e.g. Belimo COU24-A-MP

Modbus RTU for optional extensions

Suitable for TROX X-AIRCONTROL zone module X-AIRZMO-MOD, e.g. in conjunction with X-SENS-SPLITTER

Special functions

Activation qvmin, qvmax, Closed, Open, Control Stop by means of external switching contacts/wiring or bus communication

Parameter settings
Parameters specific to VAV terminal unit set at the factory

Operating values qvmin, qvmax factory set
Signal characteristic factory set

Subsequent adjustment

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

Factory settings

Electronic controller factory-mounted on the terminal unit
Factory parameter settings
Functional test under air; certified with sticker
Controller in OPEN position

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)
BUDN Universal controller with dynamic transducer

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

9 Signal voltage range
0 0 – 10 V DC
2 2 – 10 V DC

10 Operating values for factory setting
Volume flow rates in m³/h or l/s
qvconst (only with operating mode F)
qvmin (only with operating mode V)
qvmax (only with operating mode V)

11 Volume flow unit
m³/h
l/s

Order example: TVR/100/D2/BUDN/V0/50-354 m³/h

Downloads

product information

Print page BUDN - Volume flow MP/Modbus/BACnet
Product data sheet BUDN

BUDN_PD_2024_01_16_DE_en Product data sheet 770 KB pdf

certificates

Konformitätserklärung / Declaration of conformity BUDN - VRU-D3-M/B.1 TR

BUDN-VRU-D3-M_B.1-TR_CE_01_2020_07_30_de_en_fr Certificate 190 KB pdf
Konformitätserklärung / Declaration of conformity BUDN - LM24A-VST.1 TR

LM24A-VST.1-TR_CE_01_2020_07_30_de_en_fr Certificate 190 KB pdf
Konformitätserklärung / Declaration of conformity BUDN - NM24A-VST.1 TR

NM24A-VST.1-TR_CE_01_2020_07_30_de_en_fr Certificate 190 KB pdf
Konformitätserklärung / Declaration of conformity BUDN - SM24A-VST.1 TR

SM24A-VST.1-TR_CE_01_2020_07_30_de_en_fr Certificate 190 KB pdf

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BUDN

CONTROL COMPONENT WITH DYNAMIC TRANSDUCER AND SEPARATE ACTUATOR FOR VAV TERMINAL UNITS

General information

Technical information

Downloads

product information

Print page BUDN - Volume flow MP/Modbus/BACnet

Product data sheet BUDN

certificates

Konformitätserklärung / Declaration of conformity BUDN - VRU-D3-M/B.1 TR

Konformitätserklärung / Declaration of conformity BUDN - LM24A-VST.1 TR

Konformitätserklärung / Declaration of conformity BUDN - NM24A-VST.1 TR

Konformitätserklärung / Declaration of conformity BUDN - SM24A-VST.1 TR

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

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