118 DAA2 & DAX — P/N 53265:A1 8/24/2011
DAA Digital Audio Amplifiers Installation
• One-to-One Backup
Figure C.31 illustrates output sources 1, 2, 3 and 4 on the primary amplifier backed up by the
backup amplifier. Should the primary amplifier fail, all its messages will still be played as
programmed.
Figure C.31 One-to-one, All Sources Backed Up
• One-to-Many Backup
One amplifier may be used to back up as many as 31 primary DAA amplifiers. All primary
amplifiers backed by the same backup amplifier must each be wired in the same style or
combination of styles; for example, all wired Class A (Style Z), or all wired Class B (Style Y), or
all wired with one Class A and two Class B circuits.
VeriFire Tools Programming
Backup DAA Address 1
Primary DAA Address 2
DAP A+
DAP A-
REF A
DVC
TB2
TB3
DAP B+
DAP B-
REF B
Primary DAA
Backup DAA
Digital Signal
from DVC
20k ohm end-of-line
resistor,
p/n ELR-20K
ELR-20k
ELR-20k
ELR-20k
Optional Class A Return
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