XTA DNA20 Operating Instructions Manual
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Contents
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Page 26 DNA Series — DNA20 Operating InstructionstaxAppendix I: Speaker Backup InputsIt is possible to configure a secondary amplifier as a backup device for use in safety-criticalapplications, which will automatically be switched into circuit should there be a failure of themain amplifier.Failure could include loss of power, over-temperature protection or accidental remote enablingof standby.To use this feature, the backup amplifier must also be an MC2 Delta 20, or an XTA DNA20. DoNOT attempt to use another manufacturer’s amplifier or any Delta/DNA/DPA amplifier that isnot fitted with this feature.Connect the two amplifiers as shown below:Step 1: Connect both amplifiers’ inputs to the required sources and make sure both amplifiersare configured the same for routing, and source (analogue/network).Step 2: Connect speakers to the MAIN amplifier as normal in the required configuration.Step 3: Connect link cables from the Speakon outputs of the BACKUP amplifier to the Backupinputs of the MAIN amplifier, being careful to observe the correct polarity on the Backup inputs.Two Phoenix connectors are wired to each Speakon for each pair of channels.Both amplifiers must remain powered up and out of standby at all times. Should the mainamplifier fail, its output relays will disengage and in doing so, connect the outputs from thebackup amplifier directly to the Speakon speaker outputs via the Phoenix inputs. |
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