Assortment / System Description

Central applications
Automation station for HVAC supply and demand signals and manual control for lighting and blinds
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● 1 x group for emergency control of facades with 4 facade segments each
(3 of which can be delayed)
● 1 x group for protection function of facades with 4 facade segments each
(3 of which can be delayed)
● 1 x group for service function of facades with 4 facade segments each
(3 of which can be delayed)
● 1 x group for emergency control of all luminaires
Connect all sensors directly to the DXR2 for central functions via analog or
digital I/Os. A DXR2 for central functions may be required at multiple locations
in the building depending on the position of the sensors (e.g. wind sensors).
The functions belonging the sensors must be configured on each DXR2 to
which the corresponding sensor is connected.
4 different configurations for central functions are recommendation to simplify
configuration. The 4 configurations are described in the following sections.
Each of the configurations can be used and installed multiple times on a project
(e.g. if more HVAC hot water supply groups are required).
24.1 Automation station for HVAC supply and
demand signals and manual control for lighting
and blinds
The DXR2 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.
Each central automation station can manually operate 2 central groups for
lighting and 2 central groups for blinds via the KNX PL-Link switch.
The HVAC supply and demand signals are available in the DXR2 system 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 a maximum of:
● 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 automation stations can be
installed and operated for HVAC supply and demand signals.
Sensor placement
Recommendation
Room operating mode
Central manual
operation of lighting
and blinds
HVAC supply and
demand signals