Battery capacity
6
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Building Technologies
A6V10393194_d_en_--
Fire Safety
2018-11-05
6 Battery capacity
The required battery capacity depends on the required standby and alarm time, the
aging factor, and the total current in the relevant mode.
Observe the country-specific or EN regulations.
The required battery capacity can be identified using the following table and the
calculation formula.
Consumer
Standby [mA]
Alarm [mA]
Internal use by PSU
24
24
AUX 1 (e.g., sounders)
AUX 2(e.g., sounders)
Total current [mA]
Total current [mA] = standby [mA] + alarm [mA] = max. 2000 mA
[(Standby time * standby current) + (alarm time * sum alarm current)] * aging factor = capacity
Standby time [h]
24, 30 or 72
Alarm time [h]
0.5
Aging factor
1.25
Standby current [A]
Total current in standby mode
Alarm current [A]
Total current in alarm mode
Capacity [Ah]
Max. 17 Ah depending on type, see the 'Components / accessories / spare parts
[
➙
28]' chapter
l
Choose the appropriate battery based on calculated capacity.
See also
2
Components / accessories / spare parts [
➙
28]
