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2BStructure and function
18BFunction
3
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Building Technologies
A6V10212047_m_en_--
Fire Safety
2015-05-04
3.3.9
Behavior in degraded mode
Applicable for the 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.
Behavior of control panels that support degraded mode operation:
Alarming is still ensured in degraded mode operation. However, in degraded mode
only collective alarming is possible. This means that in the event of an alarm, it is
possible to identify the C-NET detector line but not the exact location of the
detector triggering the alarm.
When a sounder base DBS720 is connected to the output for the external alarm
indicator, it is activated in degraded mode in the case of a fire alarm.
Degraded mode operation on the 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.
3.3.10
Line tester
The line tester FDUL221 is able to recognize and localize the following errors on
the C-NET:
●
Wiring error
●
Open line
●
Short-circuit
●
Ground fault
In addition, the line tester recognizes the devices connected to the C-NET detector
line.
You will find more information in document 008250.
See also