Mircom QX-mini - Backup Amplifier Configuration and Wiring

79
Wiring
Two Audio Message Application
Figure 52 shows the wiring of 2 amplifiers to the audio zone splitter in an application where
each amplifier plays a different audio message.
For example, one amplifier can provide an alarm signal to a zone, and the other amplifier can
provide an alert signal to the other zones.
This configuration provides 8 outputs. The 8 outputs can select from amplifier 1, amplifier 2, or
they can be off.
Figure 52 Wiring 2 amplifiers to the audio zone splitter
4.5 Backup Amplifier
When there are 2 amplifiers installed, one of them can be configured as a backup. If the main
amplifier fails, the backup amplifier takes over.
To enable a backup amplifier
1. Configure in Software.
Figure 53 shows the wiring of 2 amplifiers where one of the amplifiers is configured as a
backup amplifier.
Figure 53 Backup amplifier wiring
OUTPUT 1
22K EOL
-
+-
OUTPUT 1
+
+
-
INPUT 1
+
-
INPUT 2
-
+-
OUTPUT 2
+
QAD-30 #2 QAD-30 #1
QAS-2X8
+
-
BACKUP
IN
OUTPUT 1
B+B-A+A-
B+B-A+A-
OUTPUT 2
TS1
B+ B-
A+ A-
TS3
TS2
OUTPUT 2
B+ B-
A+ A-
OUTPUT 1
22K EOL
+
-
BACKUP
IN
B+B-A+A-
OUTPUT 2
OUTPUT 1
B+B-A+A-
B+ B-
A+ A-
OUTPUT 2
B+ B-
A+ A-
TS2TS3TS1A TS1B
+
-
INPUT 1
+
-
INPUT 2
TS1
TS3
TS2
OUTPUT 1
QAD-30 #2 congured
as a backup amplier
QAD-30 #1
+
-
BACKUP
IN
OUTPUT 1
B+B-A+A-
B+B-A+A-
OUTPUT 2
TS1
B+ B-
A+ A-
TS3
TS2
OUTPUT 2
B+ B-
A+ A-
OUTPUT 1
+
-
BACKUP
IN
B+B-A+A-
OUTPUT 2
OUTPUT 1
B+B-A+A-
B+ B-
A+ A-
OUTPUT 2
B+ B-
A+ A-
TS1
TS3
TS2
+
-
BACKUP
IN
22K EOL
Speakers Class A or B
(Class B shown) or QAS-2X8 or
22K EOL if this output is not used
Speakers Class A or B
(Class B shown) or
22K EOL if this
output is not used
22K EOL
22K EOL