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3
General description
When the Alert Annunciation function shall be used in the systems FT512,
FT128 and FT1022G3, one or more AA units are required to present the AA
alarms and for the related manoeuvres, i.e. to acknowledge / reset the AA
alarms.
The LED "L6" (Operation) is indicating if the "Alert Annunciation" function is
enabled or disabled
When the AA function is enabled ("L6" on) and a fire alarm in the system, the
LED "L3" (Fire brigade alerted) is indicating whether the alarm is an AA alarm
or normal alarm.
LED L3 will be OFF for AA alarm and ON for non - AA alarm / Output "Fire
brigade tx" activated.
The LED "L4" (Acknowledged) is indicating if the AA alarm has been
acknowledged. See also chapter "Operation", page 25.
3.1
Alert Annunciation Unit 1736
Figure 1. The Alert Annunciation Unit (AAU) 1736.
The Alert Annunciation Unit consists of a compact size enclosure made of
grey (RAL 7035) high impact ABS, with temperature resistance up to 85° C.
Fitted with a supplementary "O" ring gasket, it will comply with IP65, in respect
of dust and moisture. The unit has no door, i.e. the front is accessed directly,
when required. The push buttons are disabled until an AA alarm is activated.
The unit shall be wall mounted. The unit is intended for indoor use and in dry
premises. Two compression glands (IP67) for cable inlets are attached.
3.1.1
SW mode 1736 - 1587
The Alert Annunciation Unit 1736 must run in SW mode 1736 – 1587.
In system FT512, 1736 units running in SW mode 1736 – 1587 have to be
connected to a DU interface board 1587 mounted in the FT512 C.I.E.
1
The AA function is normally enabled (during daytime) / disabled (during night-time)
via a time channel.
1
.
6
Technical Description
AAU 1736 – Rev 1
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