Applications and devices

 

 

To find more information about RDG2xx room thermostat applications, refer to the Basic Documentation about room thermostats, A6V11545892.

The following minimal firmware versions are required on RDG2xx room thermostat devices that they can be integrated into PXC4-2/5/7 automation stations via KNX PL-Link:

RDG200KN / RDG260KN

V5.6 / Index D and higher

RDG204KN / RDG264KN

V7.4 / Index B and higher

For more details about the compatibility of firmware versions, refer to Collection, grouping and aggregation functions for KNX PL-Link devices in this document.

Typical configuration and integration use cases

 

Commercial Building:

  • Grouping of multiple RDG2xx room thermostat devices which are in the same room zone (manager/subordinate)
  • Grouping of multiple RDG2xx room thermostat devices which are placed in the same room zone. In this way, setpoints and application modes are automatically shared from the manager to the subordinates.
  • Integration of room temperature, humidity, air quality, window status, presence, dew point sensor, supply air temperature sensor information
  • Scheduler on PXC4-2/5/7 automation stations sending resulting HVAC Mode to RDG2xx room thermostat devices
  • Distribution of HVAC Controller Mode, Changeover Mode, Outside Temperature and Clock Synchronization by PXC4-2/5/7 automation stations
  • Automatic room temperature setpoint H/C shift by system controller for summer / winter compensation
  • Green leaf functionality (reset to optimized setpoints by PXC4-2/5/7 automation stations)
  • Automated energy demand collection and aggregation into PXC4-2/5/7 automation stations based on heating and cooling distribution segments.

 

Managed Residential Building:

  • Keep functionalities local on RDG2xx room thermostat devices (limited access by PXC4-2/5/7 automation stations due to privacy reasons):
    • Scheduler for room-/apartment usage
    • HVAC Mode and room setpoints
  • Distribution of Changeover Mode, Outside Temperature, and Clock Synchronization by PXC4-2/5/7 automation stations
  • Automatic room temperature setpoint H/C shift by system controller for summer / winter compensation
  • Integration of dew point sensor and supply air temperature sensor information
  • Automated energy demand collection and aggregation into PXC4-2/5/7 automation stations based on heating and cooling distribution segments.

Configuration examples for BACnet object generation

By adding RDG2xxKN devices to your control unit, BACnet objects are generated automatically. To get an impression of how many of these BACnet objects need to be considered in the overall system limitation calculation, the following list shows four typical configurations. Keep in mind that KNX PL-Link data points do not count as integration points. For further details, refer to the system limitations in this document "PXC4-2, PXC5, and PXC7 automation stations".

 

Device type

Application configuration

BACnet objects 1)

Data points2)

RDG200KN

  • Chilled ceiling and radiator
  • Window contact

26

3

  • 2-pipe fan-coil with changeover (auto)

28

2

  • 4-pipe fan-coil heating and cooling
  • Window contact

29

3

RDG204KN

  • Chilled ceiling and radiator
  • Indoor air quality control and cooling by air (damper 0..10V)

28

3

RDG260KN

  • 4-pipe fan-coil heating and cooling with 6-port ball valve PICV

28

3

RDG264KN

  • 2-pipe fan-coil with radiator/floor heating
  • Air quality sensor
  • Window contact

32

4

  • 4-pipe fan-coil / 2-stage
  • Indoor air quality control (damper 0..10V)
  • Presence detector
  • Window contact

35

5

1) When RDG2xx room thermostat devices are added as subordinates, no BACnet objects are created.

2) Data points to be considered for Desigo CC license.