Siemens FS20 Planning Manual page 157

11.3.4.2 Selecting the power supply
Power supply
Integrated power supply (70 W)
Integrated power supply (150 W)-A4
Integrated power supply (150 W)-A5
Integrated power supply (150 W)-A4
plus an optional power supply kit
(150 W)-A4
Integrated power supply (150 W)-A5
plus an optional power supply kit
(150 W)-A5
Building Technologies
Fire Safety
Determining the relevant total current consumption
For the selection of the power supply, only the higher of the two total current values
must be taken into account:
I = higher value of I
total total_A
Legend
I Total current in alarm condition [A]
total_A
I Total current in quiescent condition [A]
total_R
I Operating current of all consumers in alarm condition [A]
A total
I Operating current of all consumers in quiescent condition [A]
R total
I Charging current [A]
L
I Relevant total current [A]
total
Selecting the power supply
The total current I must be lower than the maximum output current of the power
total
supply unit.
The tables below list the maximum output current values and the maximum
possible battery capacity of the power supply units.
Perfor Maximum output current
mance
[W] I
max.
70 2.5
150 5
150 5
300 10 A
300 10 A
● The -A5 power supply is only available at a later point. Please refer to the
separate product information for this.
● The calculated battery capacity should not exceed the maximum possible
battery capacity of the power supply.
● The required power supply can affect the size of the housing.
Determining the compact stations
Determining the batteries and power supply
or I
total_R
Minimum
possible
battery
capacity
[A] I [A] I [Ah]
max. a max. b
[A]
Accordin 7
g to
4.2 17
separate
4.4 17
Table
4.2 45
7.6 45
11
Maximum
possible battery
capacity
[Ah]
17
45
45
65
100
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2015-12-15