Siemens SPCK421 Spécifications Page 45

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Wiring the system
9
Wiring the X-BUS interface
45
Siemens AB
A6V10276959
Security Products
18.11.2011
The multi-drop configuration varies in that each expander uses the same
communication channel as it wires onto the next expander, with all expanders
using the same input channel. See multi-drop configuration in the second figure.
In the case of a X-BUS break, all expanders and detectors up to the fault continues
to be supervised. A short in the cable renders all expanders disabled.
Multi-drop configuration
1
SPC controller
2-4
Expanders
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