User Manual

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Fire & Security Products
Siemens Building Technologies Group
06.2002
4.5 Manual call points
Application:
For immediate manual actuation of fire alarm
For immediate manual alerting of external fire-fighting forces
For safety, the alarm actuating element is protected by a glass plate which must be bro-
ken in order to give an alarm.
4.5.1 Special design manual call point
For immediate manual actuation of fixed extinguishing systems such as gas and del-
uge systems.
Operating principle Application Danger of erroneous actuation
Breaking of the glass plate - along escape routes, e.g.
exits, corridors, staircases
- in specially hazardous areas, e.g.
chemical laboratories, solvents stores
- at extinguishing cabinets
- in areas where automatic detectors frequently have
to be switched off, or only insensitive detectors can
be operated
- in and at the entrance to extinguishing sectors
- When mounted close to light switches
- When mounted at exposed parts of buildings e.g.
risk of damage from vehicles
- Penetration by water, e.g.
from snow in multi-storey parking
- Deliberate actuation when mounted in places where
people act and escape unobserved e.g.
in multi-storey parking, or where units are mounted
on outside walls
- Where the purpose of the unit is not clearly shown
Type/model unit
Permissible ambient
temperature in °C
Humidity IEC protection category Special features
AT50
-25 °...+80° ≤75°C IP 30
Standard manual call point
for surface mounting
AT51 As for AT50, but with protective cover
AT50Mi Addressable standard manual call
point for surface mounting
AT51Mi As for AT50, but with protective cover
ATAN50 -25 °...+80° ≤100°C IP 66 Model for wet and very dusty applica-
tions and in explosion hazard areas
Application in intrinsically safe areas