Room automation
station DXR1 and DXR2

DXR1 and DXR2 room automation stations are perfectly suited for creating the ideal comfort conditions for the room user. They measure room air temperature, air quality (CO2), and humidity, and control fan coils, air volume flow, heat pumps, chilled ceilings and heated ceilings, chilled beams, radiators, and floor heating.

Moreover, the DXR2 can be supplemented with lighting and shading functions by adding the KNX PL-Link module.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure: DXR1 and DXR2 room automation stations

Applications

The DXR2 can be flexibly configured, regardless of available inputs and outputs. The following tested and flexible applications are available, needing only to be configured. The following applications are available:

  • Air temperature control/variable air volume control (VAV)
  • Fan coil units
  • Heat pumps
  • Chilled ceiling/ceiling heating
  • Chilled beams
  • Radiator/floor heating

All configurable DXR2s can also be combined with lighting and blinds applications.

Configurable applications meet the functional scope per VDI 3813.

Central functions

Information is centrally collected and evaluated to operate the entire system in an energy optimized way. Each application is already set up to have all the relevant information that can then be read without additional programming.

Energy relevant information includes:

  • Ventilation system: Heating/cooling demand (optimum supply air temperature), air demand (optimum supply air pressure or air volume)
  • Heat pumps: Source demand
  • Hot water/chilled water (2 pipe): Heat demand, cooling demand, heating/cooling (changeover), etc.
  • Chilled water system: Cooling demand, etc.
  • Hot water system: Heat demand

Engineering central control or central measured values is child's play: Functions can be simply enabled in the applications without additional programming.

The functions include:

  • Central operation of operating mode
  • Distribution of measured values from the weather station
  • Central blinds control

Functional extension KNX PL-Link

Each DXR2 has an integrated KNX PL-Link interface. The interface integrates communicating room operator units and field devices. One device on the KNX PL-Link is as easy to engineer and functionally integrate as the fixed inputs and outputs on the DXR2. In the event a device fails on the PL-Link and requires replacement, the new device operates immediately after mounting--no additional effort required.

Flexible room occupancy

How space is allocated is often flexible in a lot of buildings, rooms are occupied as large open offices or individual ones. Walls are only added after consulting with the lessor and are often rearranged during the occupancy phase.

The applications in the DXR2 are designed to adapt to current occupancy in a flexibly manner. For example, control and operation automatically applies to the entire room if two room segments are combined into one; the responsible DXR2 automatically coordinates the changes over communications.

Open system

BACnet and KNX are fully integrated in DXR2 and both support the most important building automation and control standards. In other words, they can be readily integrated into a superposed system. And future changes and extensions are no problem thanks to the open standards.

Even IT standards are supported, for example, using any standard web browser to directly access the integrated DXR2. Of course, a password is required to operate data points and prevent authorized access.

Wall mounted room operator
KNX PL-Link

All DXR2s support the QMX3 room operator units and room sensors for wall mounting. The devices, featuring KNX PL-Link communications, can acquire, depending on the type, the room temperature, humidity, and air quality. Types are available with or without display and operating elements, Green Leaf or air quality indicators.

For example, you can compile customized operating concepts ranging from merely acquiring measured values with display (sensors), to comprehensive display and operation of room conditions (HVAC), up to combining the same with lighting and shading to create a custom operating concept.