Wiring the System
28
Siemens Building Technologies
Fire Safety & Security Products
09.2008
7.2
Wiring of Branch Expander
The wiring of the X-BUS interface with eight terminals 1A/1B to 4A/4B provides for
the connection of an additional branch Expander.
If the branch is not used then the terminals 1A/1B are used to connect to the next
Expander/Keypad. Terminals 3A/3B 4A/4B are then not used. Branches are on all
Expanders except Keypads.
1
Previous Expander
2
Wireless Gateway Expander
(NOTE: Wireless
features and devices will be available with a later
market package.)
3
Next Expander
4
Branch
Fig. 9
Wiring of a Branch Expander