Alarms - Siemens FC10 Operating Instructions Manual

4.2.4

Alarms

Siemens Building Technologies
Fire & Security Products
An alarm is triggered when:
a manual call point has been activated,
an automatic detector has detected a fire.
The process in case of alarm depends on:
the operating mode set ('Manned' or 'Unmanned');
the zone type selected (internal, via timer V1 and V2 or direct)
The following figure shows the processing of alarms:
Zone type 'internal'
ALARM
no fire zone
fire detector zone
mode 'manned'
mode 'manned'
no influence
state 'ALARM 0' state 'ALARM 1'
• buzzer activated • buzzer activated (continuous)
• sounders activated • sounders activated
• zone output activated • zone output activated
start timer 'V1'
•
Start timer 'V2'
minor incident ?
Reset
Fig. 3 Flow diagram in case of alarm
Process: Zone type direct
In case of alarm, the fire brigade is called up immediately.
Process: Zone type via timer V1 and V2
With this zone type, the process depends on the operating mode set. As a rule:
in operating mode 'Unmanned'
In case of alarm, the fire brigade is called up immediately.
in operating mode 'Manned'
During V1 the staff may acknowledge the alarm. During V2 the staff may check
whether it is a real fire or false alarm.
Process: Zone type internal
Alarm is only indicated on the control unit, it is not transmitted to the fire brigade.
Zone type 'via timer V1/V2'
ALARM
V1 expired ?
'V1'
acknowledged ?
•
activate next call point
fire ?
or
Decision
press key
•
'cancel alarm delay'
V2 expired ?
Structure and function
Zone type 'direct'
ALARM
ALARM
manual call point zone
fire detector zone
mode 'manned'
mode 'unmanned'
no influence
state 'ALARM 2'
Buzzer & sounders (re-) activated
•
control lines(re-) activated
•
contact RT-Alarm activated
•
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04.2004