Siemens FC7xx Operation Manual page 145

Building Technologies
Fire Safety
'Manual zone'
A 'Manual zone' combines the 'Manual call points'. Danger signals are evaluated by
means of an OR relation. Each detector of a 'Manual zone' can generate 'ALARM',
but not 'Pre-ALARM'.
'Automatic zone'
A 'Automatic zone' combines 'Automatic detectors'. The 'Automatic zone' can
generate 'Pre-ALARM' and 'ALARM'. A distinction is made between the following
detector dependencies:
● ↑ Multi-detector dependency
With multi-detector dependency, the ↑ danger levels of several detectors are
linked (AND relation) and evaluated. A 'Pre-ALARM' or 'ALARM' is generated
when the defined danger levels have been reached.
Several evaluation variants are possible in multi-detector dependency.
● ↑ Single-detector dependency
With single-detector dependency the danger levels of one or more detectors
are linked (OR relation). A 'Pre-ALARM' or 'ALARM' is generated as soon as at
least one detector has reached the defined danger level.
Sample criteria for 'Pre-ALARM' or 'ALARM'
Alarm level
'Pre-ALARM'
'ALARM'
Table 9: Alarm levels
'Technical zone'
In a 'Technical zone', inputs for ↑ technical messages are combined, e.g., fault or
danger by extraneous equipment.
'FSE zone'
A release element is assigned to this ↑ zone. With the release element, a fire
alarm is generated manually, which in turn releases the lock to the 'Key depots'
with the keys for the building. To operate the release element, a key is required
which is exclusively in the possession of the fire brigade.
↑ Single-detector
dependency
1 x ↑ danger level 2
1 x danger level 3
System description
9
Evaluation
↑ Multi-detector
dependency
1 x danger level 2 or 3
2 x danger level 2 or 3
145 | 184
A6V10211076_i_en_--
2015-12-15