Siemens Cerberus CS1140 - Page 56

e1249d2
52
Fire & Security Products
Siemens Building Technologies Group
01.1999
second address, the second detector occupies the third address, etc.
At the end of the stub line, after the last detector, T-T END occupies another address.

Since the two nodes for the start (DC1135s) and end (T-T END) of the
stub line have no counterparts in the logical structure, they remain unlinked (prefix *
remains).
DC1135  represented
in the physical structure
by 2 separate devices
(DC1135s/ T-T END)
’224: T-T END’’221: DC1135s’
Localization
structure
Function unit
DC1135  represented in
the localization structure by
2 devices each of which
has the same localization
index
Station
Physical
structure
’FU DS11a’
’221: DC1135s’ ’224: T-T END’
Logical
structure
No link with the
logical structure!
Logical and physical structure
see example ’DC1135 with one stub line’  page 59
DC1135 with two to four stub lines
(zero ohm resistance on the circuit unit remains)
Regardless of whether the stub lines have devices connected or not, the beginning
(DC1135m) and end (T-T END) of the four stub lines each has its own D-Bus address.
This means that the multiple T-branch module always occupies eight D-Bus addresses.