Page 52 - Priesgaisrine signalizacija FX 3NET_Schneider Electric_Projktavimo instrukcija_ENG

Planning Instruction 66571760GB0 Fire Detection 9

The initial delay time and the additional delay time are set in 10-second increments and are limited by the standard
to a maximum of 5 minutes and 10 minutes, the total delay time being further restricted to a maximum of 10
minutes.

Delayed alarm mode is selected individually for each address (normally only for smoke detectors).

Delay is terminated by a non-delayed alarm signal (normally heat detector or manual call point).

Delay termination can also be selected to occur when a second (delayed alarm) detector gives a fire signal.

3.3 Delayed signal inputs

A third way to avoid nuisance alarms is to use delayed signal inputs. The time can be set in 10-second increments
up to 60 seconds and is typically set to 20 or 30 seconds. The function requires that the signal from the detector
remains above alarm level for the selected time before an alarm is issued by the panel. If the signal goes below the
alarm level, the timer is stopped. This effectively filters out transients in the detectors or in the communication
between the panel and the detectors.

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Schneider Electric Pelco Finland Oy Kalkkipellontie 6, 02650 Espoo, Finland Telephone: +358 10 446 511 Fax: +358 10 446 5103 www.pelco.com/nordic
Document Number 66571760GB0 49 2011