Siemens FC122-ZA - 11 Battery Capacity; FC121-ZA Calculation; FC122-ZA Calculation

76
Smart Infrastructure A6V10393190_h_en_--
2019-09-01
11 Battery capacity
The battery capacity depends on panel type and standby time. The standby time is
regulated by local code of praxis or the EN regulation.
The required battery size can be identified using the following calculation.
Moreover, the calculation indicates whether an external power supply is needed.
11.1 FC121-ZA calculation
Type Description
Standby
[mA]
Alarm
[mA]
Panel (internally) Sounders, etc…
Standby
[mA]
Alarm
[mA]
Standby
[mA]
Alarm
[mA]
FC121-ZA 2 zone panel 38 107
Out 1 (e.g. Sounders)
Out 2 (e.g. Sounders)
Aux. output
Accessory cards
FCA1203-Z1
(1st)
Output card 2M 2R 12 25
Out A&B (e.g. Sounders)
FTO1203-H1 EVAC Module 0.5 2.2
Standby current [A]
Alarm current [A]
If the total current of the outputs (Sounders, etc.) is higher than
500mA
, then an external
power supply is required.
In order to reduce the total current:
- Power the output A&B from the external power supply (possible per card).
-
Move the Auxiliary output to the external power supply.
Choose the appropriate battery size depending on the calculated capacity.
[(Standby time × Standby current) + (Alarm time × sum alarm current)] × Aging factor = Capacity (max.12 Ah)
_ _ h × 0._ _ _ A + 0.5 h × _._ _ _ A × 1.25 =
Standby time [h]: 24, 30 or 72
Alarm time [h]: 0.5 hour
Aging factor: 1.25
Standby current [A]: Total current in standby mode
Alarm current [A]: Total current in alarm mode
Capacity [Ah]: 4.5 Ah; 7 Ah
11.2 FC122-ZA calculation
Type Description Standby Alarm Panel (internally) Sounders, etc…