Room operating mode

The DXR2 room automation station receives commands to change room operating mode via digital inputs and takes over control of the electrical and mechanical installations light, facade, and HVAC in the room.

The command to changeover room operating modes can be created using a BACnet reference.

Central manual operation of lighting and blinds

Each central automation station can manually operate two central groups for lighting and two central groups for blinds via the KNX PL-Link switch.

HVAC supply and demand signals

The HVAC supply and demand signals are available in the DXR2 as BACnet data points can be read and written by each BACnet primary plant. HVAC supply and demand signals cannot be created via analog and digital inputs.

One DXR2 with central functions can control the following maximum number of groups:

  • 4 x groups for distributing room operating mode to rooms
  • 2 x hot water supply groups
  • 2 x chilled water supply groups
  • 1 x air supply group (based on demand)
  • 1 x heat pump supply group

If more supply groups are required, additional DXR2 can be installed and operated for HVAC supply and demand signals.

 

PAS

Automation station for supply plant

 

AS

Room automation station

BI

Digital signals for room operating mode

 

CAS

Central automation station for emergency control

KNX PL-Link

KNX PL-Link pushbuttons for central switching/dimming of luminaires and control of facades

Figure: Plant diagram for HVAC supply/demand signal automation station