Siemens SPCK421 Spezifikationen Seite 44

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Seitenansicht 43
9
Wiring the system
Wiring the X-BUS interface
44
Siemens AB
A6V10276959
Security Products
18.11.2011
Star configuration
NOTICE
All expanders/keypads are fitted with a termination jumper by default. In star
configuration it’s imperative to remove these jumpers.
A star configuration is established when multiple expanders are wired back to the
same X-BUS port on the S P C controller. Depending on controller type 2 ports may
exist (1A/1B, 2A/2B), however only one port (1A/1B) is to be used on each keypad
or expander.
In the case of a X-BUS break the single will be disconnected, all other expanders
and detectors continues to be supervised. A short in the cable renders all
expanders disabled.
Star configuration
1
SPC Controller
2-4
Expanders
Multi-drop configuration
NOTICE
All expanders/keypads are fitted with a termination jumper by default. In multi-
drop configuration it’s imperative to remove these jumpers with exception of last
keypad or expander.
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