Specifications For Electric Ethernet; Guidelines For Bacnet Connections - Siemens FS20 Planning Manual

Planning the networking of the stations
8
Guidelines

8.16.5 Specifications for electric Ethernet

8.16.6 Guidelines for BACnet connections

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Building Technologies
Fire Safety
Please observe the following points:
● CAT5/CAT6 Fast Ethernet cables must be used for networking via Ethernet.
● A crossed cable must be used for the link between two ↑ stations via the
Ethernet.
● When networking via electric Ethernet only (not EN 54-compliant), a maximum
number of 32 stations an be connected to each other by means of a hub or
switch (do not use crossed cables).
● When networking via FCnet/Ethernet (not EN 54-compliant), a maximum
number of 14 stations (incl. router station) can be connected by means of a hub
or switch (do not use crossed cables).
● With cable lengths longer than 100 m, a switch or router must be used for the
amplification of the signals (do not use crossed cables).
↑ BACnet connections for ↑ management stations are subject to the following
guidelines:
Parameters
Maximum number of management stations (↑ BACnet
clients with access to each ↑ station)
Maximum number of BACnet clients total *
Maximum number of FS20 stations per ↑ SAFEDLINK
network (sub-net) with management stations
Maximum number of FS20 stations per FCnet/LAN
(extended network) with management stations
Table 34: System limits for BACnet connections
* Each additional BACnet client (e.g., STT20, Desigo PX controller) may only
access one station.
You will find other potential restrictions for MM8000 or GMA-Manager in the
relevant description and Release Notes.
Limitations
Fire control panels with PMI & mainboard FCM2004 cannot be connected to a
management station.
Compatible management stations
You will find information about the compatibility of management stations in the
corresponding documentation for the management system.
System limits
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2015-12-15