User Manual

Siemens Switzerland Ltd 17
Building Technologies Division
2.2.2. Elements
Figure 2.2.2-1 Setup of a fire detection system
Periphery Fire-related information is collected from all parts of the building by the input
periphery (automatic detectors, manual call points and input contacts) and
transmitted to the control unit.
The intelligent, automatic fire detectors (point-type detector or aspirating smoke
detection) detect and analyze the different fire phenomena and automatically
report the current hazard levels to the control unit. When selecting the correct
fire detector for each location (together with its settings and placement), it is
also crucial to consider the type of fire to be expected, the room height, ambient
conditions such as air changes and possible deceptive phenomena.
Manual call points enable direct alarm activation by people who recognize an
incipient stage fire or smoke in their vicinity.
Contacts (e.g. from the activation of a sprinkler extinguishing system) report a
fire alarm indirectly.
Control unit/panel The system is monitored, controlled and operated by the fire detection control
unit, which evaluates the hazard messages from the peripheral devices activates
audible alarm warnings, fire control installations and sends a signal to
extinguishing control panel.
Actions The actions initiated by the control unit/panel include alarming, activating the
fire controls and alerting the fire brigade. Optical and acoustic alarm devices
warn the people in the building. The activation of the preprogrammed fire
controls causes fire doors to be closed, and smoke and heat extraction systems to
be activated, in certain cases extinguishing systems may also be activated.
Integration Centralized danger management and supervision of the complete fire protection
installation ensures highest safety of people, assets and business processes.
Extinguishing system