User Manual

BACnet networks with MS/TP trunks
Application examples
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IT security and IT basic protection
The elements of infrastructure, IT systems, networks, and applications must be discussed under the
aspects of security and appropriate measures need to be developed. Customer, domestic, or industry
guidelines and directives must be observed under all circumstances.
For additional details, see
IT security on installations with Desigo (CM110663) and Practical Guide on IP
Networks in Building Automation and Control Systems
(CM110668).
Reliability and redundancy
Distribution switches can be cabled on the floor distributors from the core switch in a Gbit ring as
backbone if the customer requires extended availability. To this end, special network components must be
planned on midsized to highly complex networks with basic cabling of fiber optics and copper cable.
Yet another level for increasing reliability and redundancy is to employ two core switches at different
locations.
Cabling the distribution switches
The distribution switches can be cabled in RSTP, increasing reliability. The BACnet MS/TP IP routers are
either connected directly to the distribution switch or on remote edge switches.
Fiber Optics
Twisted Pair
B
C
A –
–
–
Distribution Switch
Edge Switch
C
A
Core Switch
C
A
B