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3.4 Behaviour in degraded mode
Building Technologies
Fire Safety
2-loop operation
The multi line separator module can be connected to two separate FDnet/C-NET
loops.
Figure 5: FDCL221-M topology with two detector line loops
First sub-stub on FDnet/C-NET
1/1
loop 1
1/n
Nth sub-stub on FDnet/C-NET
loop 1
Nth sub-stub on FDnet/C-NET
2/n
loop 2
See also
2 Printed circuit board view [➙ 18]
2 Indication elements [➙ 18]
2 Adjustment elements [➙ 19]
Applicable for the FDnet/C-NET:
When the main processor of the fire control panel fails, the control panel works in
degraded mode operation. Depending on the control panel type, the fire control
panel can continue to perform the most important alarming and signaling functions
in degraded mode operation.
Degraded mode operation on the FDnet/C-NET is not supported in the same way
by all control panels. The information in the 'List of compatibility' and in the
corresponding control panel documentation must be taken into account during
project planning.
Setup and function
Behaviour in degraded mode
Fifth sub-stub on FDnet/C-NET
2/5
loop 2
Ts
FDnet/C-NET device on sub-stub
FDnet/C-NET device on
Tr
FDnet/C-NET loop
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2018-10-25
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