Siemens FS720 Mounting & Installation page 79

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)
4 Additional fused terminal (F2) on the DIN rail
● The connection lines marked in bold of the additional cable tree (3) and the
existing cable tree (2) must be wired again when installing the second power
supply (slave).
● In order to avoid operating temperature differences, the two 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.
● The positive pole for the batteries must be unwired at connection X8-9 (Master)
and be provided with an external fuse.
● 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).
Installing, exchanging and connecting modules
Power supply (150 W)
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A6V10210390_j_en_--
2015-12-15