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4 Planning
Building Technologies
Fire Safety
Unique detector line topology recognition is 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 6: Line separator 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.
Rules for the branching of a sub-stub from a loop
●
Only one sub-stub is permitted between two FDnet/C-NET devices.
●
One sub-stub is permitted at the start and end of the loop respectively,
between the connection terminals of the fire control panel and the first line
device.
●
If there is more than one sub-stub between two FDnet/C-NET devices, a line
separator must be fitted between the sub-stubs.
The following figure shows the common variants of a detector line which has been
modified from a collective detector line to a FDnet/C-NET detector line, on which
FDnet/C-NET devices (Tr/Ts) are installed with an integrated line separator
function. The outgoing sub-stub lines are directly connected to the multi line
separator modules FDCL221-M without a distributor terminal.
Planning
4
Accessories
FDCL221
FDCL221-M
25 | 42
A6V10224006_g_en_--
2018-10-25
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