Configuration Instructions

System configuration
Configuring the backup amplifier system
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5.17.11 Example of a backup amplifier concept
The following example illustrates the inner workings of the backup amplifier
concept.
CAUTION
Loss of speaker lines
No announcement in the case of an alarm
● Plan the backup amplifier concept for each amplifier within the system.
The following example can only compensate for a fault on a single amplifier. Any
further faults will result in the loss of speaker lines.
● 2x 'Digital audio matrix (4/4/16)'
– 1x backup master
– 1x slave
● Two amplifiers are connected to each 'Digital audio matrix (4/4/16)'.
● Each amplifier has two audio channels.
– E.g., DigiPower 2x250 W
Fig. 52: Inner workings of backup amplifier concept
● The amplifiers (1) are used for background music and announcements.
● The backup amplifier (2) is activated when the system detects a fault.
● All amplifiers are constantly monitored via a pilot tone.
● The 100 V signal of the backup amplifier (3) is connected to all 'Digital audio
matrix (4/4/16)' in the same backup configuration.
– This wiring is also monitored by all 'Digital audio matrix (4/4/16)'.
● A pilot tone is used to monitor the speaker lines (4) too.