User Manual

6
Fire & Security Products
Siemens Building Technologies Group
1964_a_en_--.doc
07.2001
3.1 Logical tree
The logical tree represents the logical/geographical data image of a station.
Area
The Area comprises lower ranking nodes (sections, zones, elements) that are linked to
a common alarm organization. The alarm organization can be set either to:
 DAY (Day mode, manned operation)
A danger event can be investigated by the on-site security personnel
before external intervention squads (fire department) are summoned.
 NIGHT (Night mode, unmanned operation)
The intervention squads (fire department) are summoned immediately.
By means of “Event evaluation devices” the area controls the alarm devices (internal
horn, external horn, remote transmission channels) in accordance with the require-
ments of the lower ranking nodes.
System limit:
4 areas per CC11.
Section
Detection sections collect the states of the affiliated detection zones and allow collec-
tive operation.
Control sections are used for joint control of the lower ranking control zones.
System limit:
255 per area.
Zone
Detection zones evaluate the information (danger levels) of the affiliated detection de-
vices. The are responsible for the alarm decision.
Control zones contain the control logic for controlling the affiliated elements.
System limit
: 1000 zones per CC11.
Element
Detection devices evaluate the information supplied by the detectors and transmit it to
the higher ranking detection zone.
Control devices control the affiliated digital outputs.
System limit:
1000 elements per CC11.