Siemens FS720 Mounting & Installation page 115

Building Technologies
Fire Safety
1 Cable tree to periphery board or fire terminal board
2 Existing cable tree (connection for master power supply)
3 Additional cable tree for the second power supply (slave 1)
4 Additional fused terminal (F2) on the DIN rail
5 Additional cable tree for the third power supply (slave 2)
● The connection lines marked in bold of the additional cable tree (3 and 5) and
the existing cable tree (2) must be wired again when installing the second
power supply (slave).
● In order to avoid operating temperature differences, all three power supply
units must be mounted next to each other in the same housing.
● The batteries and the system supply must only be connected to the master
power supply unit.
● Only one temperature sensor must be connected to the master power supply
unit.
● The temperature sensor must be fitted close to the batteries. (You will find
precise details in document A6V10210390).
NOTICE
Damage to the power supply
Different versions (A4/A5) of the power supply (150 W) may not be switched in
parallel.
Installing, exchanging and connecting modules
Power supply (150 W)
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A6V10210390_m_en_--
2018-08-29