User Manual

7
Fire & Security Products
Siemens Building Technologies Group
1964_a_en_--.doc
07.2001
3.2 Physical tree
The physical tree represents the installed hardware components of a station.
Station
The term Station refers to individual nodes on the C-Bus. Stations supply primarily in-
formation on faults in the connected hardware.
Currently the following stations exist: CC11, CT11 and CK11.
System limit:
16 stations per CS11.
Function unit
The term function unit refers to modules connected to the internal I-bus of the stations.
Typical function units are detector modules, extinguishing control modules, digital I/O
modules, etc.
System limit:
16 function units per CC11.
Device
Devices are transmitters or actors on a detector bus or digital inputs and outputs of a
corresponding module. The device states are always represented in the logical tree via
the affiliated element.
System limit:
1000 devices pro CC11.
3.3 Structure of the tree nodes
Tree nodes are database records with a certain data type (structure number, StrucNr)
that receive a (station-wide) unique instance number (sequence number, SeqNr) at the
time they are created.
Tree nodes contain one or several datapoints.