Siemens FC10 Operations Instructions download pdf (Page 13)

Structure and function

Siemens Building Technologies 007995_a_en_--.doc

Fire & Security Products 04.2004

4.2.4 Alarms

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:

•

‘V1’

•

state ‘ALARM 1’

zone output activated

start timer ‘V1’

Decision

ALARM

mode ‘manned’

ALARM

manual call point zone

mode ‘manned’

no influence

state ‘ALARM 2’

Buzzer & sounders (re-) activated

control lines(re-) activated

contact RT-Alarm activated

Reset

V1 expired ?

acknowledged ?

V2 expired ?

fire ?

minor incident ?

Start timer ‘V2’

Zone type ‘via timer V1/V2’ Zone type ‘direct’

ALARM

mode ‘unmanned’

state ‘ALARM 0’

buzzer activated

sounders activated

zone output activated

ALARM

mode ‘manned’

no influence

Zone type ‘internal’

activate next call point

press key

‘cancel alarm delay’

no fire zone

fire detector zone

buzzer activated (continuous)

sounders activated

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.

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