Control component
Control component
VME with control component BTD
VME with control component BTD
VMR with control component BTD
VMR with control component BTD
mp-bus_bacnet_modbus_logo-komposition_logo_01png.png

Communication interfaces

Control component
VME with control component BTD
VMR with control component BTD
mp-bus_bacnet_modbus_logo-komposition_logo_01png.png

BTD   

Effective pressure transducer for clean air

Effective pressure transducer based on the dynamic measurement principle for volume flow rate measuring units VME and VMR
■ Use in ventilation and air conditioning systems, only with clean air
■ Analogue or digital actual value signal for monitoring and evaluation by the central BMS
■ Suitable for constant and variable volume flows
■ No commissioning required as parameters are factory set
■ Recording of measured values for the display of volume flow rates or for the control of slave controllers
■ Service access for PC configuration software
■ Access with a smartphone thanks to NFC interface and wireless
■ Data transparency due to bus communication with MP bus, Modbus RTU or BACnet MS/TP

General information

Application
  • Determination of volume flow rates and transmission/ processing as an electrical signal for monitoring/tracking control
  • Measurement of an effective pressure and conversion of the volume flow rate actual value into an analogue and digital actual value signal
  • 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
  • Volume flow rate actual value is available as a network data point or linear voltage signal
  • Use TROX FlowCheck app and PC tool to configure the controller and the communication parameters
  • Transducer factory-set to the unit-related constant (K value) of the measuring unit

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 BTS attachment group instead of the BTD universal controller described here

Interface

Analogue interface

  • Analogue interface with adjustable signal voltage range

Digital communication interface (bus)
  • MP bus
  • Modbus RTU, RS485
  • BACnet MS/TP, RS485
  • Data points, see bus lists

Factory setting

  • Actual value output via analogue interface and Modbus communication interface

Signal voltage ranges
  • 0 – 10 V DC
  • 2 – 10 V DC

Parts and characteristics
  • Effective pressure transducer according to the dynamic measurement principle (dynamic transducer)
  • Plug-in terminals for supply line and controls including cover
  • NFC and service interface
  • Indicator lights for displaying the operating mode
  • Controller casing prepared with 4 openings for threaded connections, 2 cable glands M16 x 1.5 for connecting cable in the supply package

Construction

Type VRU-D3-M/B TR for volume flow rate measuring unit

  • For VME all dimensions
  • For VMR all dimensions

Commissioning
  • All parameters are factory-set
  • On-site adjusting is not required
  • Modbus/BACnet/MP bus interface: additional commissioning steps may be required
  • Operating parameters can be adjusted using the TROX FlowCheck app

Useful additions

TROX FlowCheck app for Android and iOS

  • Belimo PC-Tool
  • Wireless-to-NFC converter ZIP-BT-NFC

Technical information

  • FUNCTION
  • SPECIFICATION TEXT
  • Order code
Principle of operation – volume flow rate measuring unit Funktionsprinzip_XTDai.png
① Effective pressure transducer (dynamic measurement principle)
② Transducer for converting the effective pressure signal into a volume flow rate signal
③ Analogue actual value signal
The volume flow rate measurement is carried out by measuring an effective pressure. The volume flow rate measuring unit is fitted with an effective pressure sensor for this purpose. The effective pressure is converted into a voltage signal by an effective pressure transducer with a dynamic measurement principle. The volume flow rate actual value is available as a voltage signal and digital information. The factory setting is such that 10 V DC always corresponds to the nominal flow rate (qvnom). Voltage ranges are stored in the transducer.
This specification text describes the general properties of the product.

Category

  • Volume flow rate measuring unit

Application

  • Recording of a constant or variable volume flow rate actual value, e.g. for connection to the central building management system for the purpose of monitoring or integration into a room balancing system

Pressure range

  • Effective pressure transducer for dynamic pressure measurements in ventilation and air conditioning systems with clean air

Installation orientation

  • Either direction

Connection

  • Plug-in terminals with cover. No connection box required

Supply voltage

  • 24 V AC/DC

Interface/Control

Analogue signal
  • 0 – 10 V DC; 2 – 10 V DC
or digital bus connection
  • Modbus RTU
  • BACnet MS/TP
  • MP bus
Interface type can be set and connected by others

Interface information

Analogue signal:
  • Volume flow rate actual value
Bus interface:
  • Volume flow rate actual value
  • Error status

System connections

  • Flexible integration into digital bus systems

Parameter setting
  • Parameters specific to measuring unit are factory-set
  • Signal characteristic factory set
Subsequent adjustment using optional tools:
  • TROX FlowCheck app, PC software (wired)

Condition upon delivery

  • Electronic transducer is factory mounted on the measuring unit
  • Factory-set parameters
  • Functional test with air (see sticker)
VMR–P1/125/BTD/0
|||||
13579

1 Type
VMR Volume flow rate measuring unit

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

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

7 Attachments (effective pressure transducer)
BTD Effective pressure transducer for measuring units, dynamic

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

Downloads

informazioni di prodotto

  • Product data sheet BTD 

    BTD_PD_2021_08_12_Update_2026_DE_en Product data sheet  690 KB pdf
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