User Manual
Structure and function
Function
3
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Building Technologies
A6V10218037_n_en_
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Fire Safety
2019
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03
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3.2 Function
3.2.1 Activation levels and sound level
The sounder base can be activated for two selectable event categories (e.g. pre-
alarm or alarm). The tone and sound intensity can be configured individually for the
two selectable event categories. 11 tones are available, each with two sound
levels.
The sounder base is connected to the connection for the external AI. It does not
therefore take up an address on the detector line. The control panel communicates
with the detector via the detector line. The detector communicates with the sounder
base.
During the function test, a test sound with a low sound level can be activated.
The sounder base and other alarm sounders on the same detector line are
synchronized with one another.
The presence of the sounder base is automatically detected by certain control
panels. Note the documentation for the relevant control panel.
3.2.2 Diagnosis levels
The sounder base DBS720 monitors its function by itself. The following diagnosis
levels are taken from the different control measuring processes:
● Normal
● Observe information
● Fault
When a fatal error occurs, which makes the proper function of the sounder base
impossible, a fault message is signaled. To remedy the cause, additional
information is available in the sounder base. This can be displayed on the control
panel for example.
You will find more detailed information in the fire detection system documentation.
3.2.3 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.
Interbases are also activated and deactivated in case of a fire alarm in degraded
mode operation.
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.