User Manual

Network architecture
DALI architecture (FLN)
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The PXC3 and DXR2 room automation stations have an integrated KNX power
supply to supply their trunks with the corresponding KNX PL-Link devices. This
allows simple installations, e.g., an automation station with one or a few room
units, without an extra device for power supply to the KNX PL-Link network. If
many KNX PL-Link devices are connected, the power supply at the room
automation stations is shut off and an external KNX power supply must be
used.
The following figure shows the concept of a built-in power supply unit (PSU):
System devices
Third-party KNX devices can be integrated in KNX PL-Link networks via KNX
S-mode. The KNX Engineering Tool Software (ETS) is necessary to engineer
and commission these devices.
DXR2.M.. automation stations cannot integrate KNX S-Mode devices.
14.5 DALI architecture (FLN)
DALI (Digital Addressable Lighting Interface) is a dedicated protocol for lighting
control. See www.dali-ag.org.
DALI is tailor made for modern lighting solutions. A DALI system can be as
small as a single luminaire, or can encompass multiple systems across one or
more buildings. DALI systems can be connected using lighting hubs/routers.
DALI features:
● Max. 64 devices per subnet (hub/routers)
● Max. 300m cabling
● Max. 250mA device consumption
● Standard two-core cable (1,5mm²)
● Polarity free & free wiring topology
● DALI power and data on the same pair of wires
● Bidirectional communication with feedback of operating state (dim level,
lamp failure, etc.)
Room Room Room
KNX PL-Link network
Automation
station
BAC network
Automation station
PSU
KNX PL-Link network
Power supply concept