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6.4.1 Emergency power supply
Building Technologies
Fire Safety
Should the AC mains voltage fail, the emergency power supply will be provided by
the connected batteries with no interruptions. The emergency power bridging time
depends on the control panel's quiescent and alarm current and the battery
capacity used. Once the emergency power bridging time has lapsed, it must be
possible for the external signal transmitters to be activated in the event of an alarm.
This activation must also be ensured at a battery final voltage of DC 21.2 V.
NOTICE
Error during configuration detection
Additional effort for troubleshooting
●
Only connect the battery connection cables (*) once all installation work is
complete because the station will start as soon as the batteries are
connected.
Figure 21: Diagram with battery wiring on 70 W power unit
Emergency power bridging time
Depending on national and local requirements, a bridging time of 72 hours or more
may be needed for the emergency power supply. The battery capacity needed
must be calculated and the calculation checked by measuring the power consumed
during an alarm (with mains voltage deactivated). The Quantities Tool software is
available for calculating the battery capacity.
New batteries / initial commissioning
When using new batteries, they must be charged for at least 24 hours before
commissioning. If the date of manufacture (printed on batteries) is more than nine
months ago, they will need charging for at least 48 hours.
Total discharge
There is no guarantee that totally discharged batteries can be correctly charged
again. Replace batteries that have been totally discharged with new ones. You
may only use the approved battery types for the emergency power supply in fire
detection systems. Also note the details provided by the battery manufacturer.
Power supply - mains voltage connection
N
Akku -
Akku 1
Installation
6
Akku 1
49 | 118
A6V10211100_f_en_--
2015-12-15
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