User Manual

Overview
Merging BACnet/IP networks
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On the actual floors, up to 20 Desigo room automation stations are network over a daisy chain. The entire
network continues operated, even if a device fails.
Copper cabling can still be used to reach individual edge switches. And from there distributed (depending
on the application) in a star or daisy chain topology.
The distribution switches are equipped as managed layer 2 switches; the edge switches as unmanaged.
This topology illustrates that you can expand in the future using layer 2 switches. Separate VLANs can be
configured for each floor to separate disciplines (HVAC, room automation, video, fire detection systems).
Ring cabling of distribution switches meet customer requirements for reliability. Important Desigo room
automations for central functions and important room are cabled in a star topology to the edge switch.
Large project
The following illustrates a large project with various disciplines. Emphasis is also placed here on speed,
availability, a structure cabling concept, and standardized connection technology. Advanced availability and
redundancy is achieved by using an additional core switch.
Glass fiber optics can cable network components across building over long distances, over EMC risky
areas, and where there is a risk of potential drift.
Floor 2
Desigo Room Automation Stations
XB205-3
Floor 1
Basement
Desigo Room Automation Stations
XB004-1
(Power AC 24 V)
Desigo Primary Automation Stations
XB205-3
XB205-3
S 623
XB205-3
XB205-3
XB005
(Power AC 24 V)
Typical Project
Desigo CC
Workstation
BACnet/IP over
Ethernet (Twisted Pair)
Ethernet (Fiber Optics)