Siemens FC700A - Manual (Page 56)

Alarm concept
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Siemens Building Technologies 007836_a_en_--.doc
Fire & Security Products 03.2004
24 Alarm concept
The alarm concept must be worked out individually for each system
The important thing is to pass on the alarm message quickly to the appropriate
group of recipients
The requirements vary between
– 'Discreet alerting' of the reconnaissance squad, e.g. via staff paging system
– 'Alarm / evacuation' for people familiar with the location
– 'Alarm / evacuation' for people unfamiliar with the location
– 'Area evacuation', e.g. building storey
24.1 Cerberus Alarm Concept (CAC)
The Cerberus alarm concept prevents the unnecessary turnout of the fire de-
partment for minor incidents
The CAC is based on an alarm organization involving the presence or absence
of personnel:
– Presence of operating personnel or "Day"
– Absence of operating personnel or "Night"
The response of the operating personnel is monitored by two independent time
circuits (V1 and V2) monitored
The CAC is an integrated part of the FC700A control unit. The required parame-
ters can be entered via the user functions
24.2 Principle of the Cerberus alarm concept
– During the "Day" operating mode, if an alarm is activated its source is located
and the decision is taken "Emergency" or "Minor incident"
– During "Night" operating mode, all signals immediately generate a "Remote
alarm"
– The activation of a manual call point always immediately generates a "Remote
alarm"
F
Alarm
event
Remote
alarm
manned Operating mode
manned or
unmanned
<Reset> pressed
'Minor incident'
<Acknowledge>
pressed
F pressed
'Emergency'
Normal
operation
V1
running
V1 = 0
V2 = 0
unmanned
V2
Local
alarm
running
General
alarm
<Alarm delay OFF>
- or -