Planning - Siemens FDCL221 Technical Manual

Planning

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Unique detector line topology recognition is only ensured if at least one device with
a separating function is present between two sub-stub lines. In this case a line
separator.
Station
Figure 4: Line separator FDCL221 between two sub-stubs
If several sub-stub lines are to be activated on one FDnet/C-NET loop, failure of
large numbers of devices must be prevented in the event of a line short-circuit. In
this regard the national regulations must be observed.
From a FDnet/C-NET communication point of view, the line separator is a normal
line participant which occupies one bus address and is visible in the line topology.
FDCL221
FDCL221-M
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