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The amplified signal from each audio amplifier must be connected to a control module, which will
switch the signal to a speaker circuit when necessary. Figure 2.1 through Figure 2.4 illustrate the
wiring configurations for the AA-100 and AA-120 audio amplifiers.
NOTE: SURVIVABILITY CLAUSE:
Per the National Fire Alarm Code, NFPA 72, all circuits necessary for the operation of the
notification appliances shall be protected until they enter the evacuation signaling zone that they
serve. Any of the following methods shall be considered acceptable as meeting these
requirements.
1) A 2-hour rated cable or cable system
2) A 2-hour rated enclosure
3) Performance alternatives approved by Authority Having Jurisdiction (AHJ)
Trouble
IN
T ro u b le
IN
AA-100/AA-120 Audio Amplifiers Installation/Operation Manual — P/N 9000-0573:C 03/12/2020
Section 2: Speaker Switching
SLC
AA-100/AA-100E High
Level Audio Out (70.7V)
Supervised
Class 2Power-Limited
70 V Transformer
Connection
(AA-120/AA-100E only)
Audio
Backup
OUT
IN OUT
IN
AA-100/AA-100E
Upper Board
Figure 2.1 Speaker Switching Configuration for the
AA-100/AA-100E (Class B) with AOM-2SFor AOM-MUXF (Class B)
S L C
A A -1 0 0 /A A -1 0 0 E H ig h
L e v e l A u d io O u t (7 0 .7 V )
S u p e rv is e d
C la s s 2 P o w e r-L im ite d
7 0 V T ra n s fo rm er
C on ne ctio n
(A A -12 0 /A A -10 0E o n ly )
A u d io
B a ck up
B a c k u p
O U T
IN O U T
IN
O U T
A A -1 0 0 /A A -1 0 0 E
R 1 0 0
U p p e r B o a rd
Figure 2.2 Speaker Switching Configuration for the
AA-100/AA-100E (Class B) with AOM-2SF or AOM-MUXF (Class A)
Control Module
AOM
Module polarities
are shown in alarm
High Level
Audio Return
(4-wire mode required
for AA-100/AA-100E)
Backup
AA-120/AA -120E
OUT
High Level
Audio OUT
R100
S p e a k e r S w itc h in g C irc u it – N F P A C la s s A
S p e a k e rs m u s t b e L is te d fo r fire p ro te c tio n
M a x im u m L o a d : 4 3 .7 5 w a tts m a x .
C o n tro l M o d u le
A O M
M o d u le p o la ritie s
a re s h o w n in a la rm
B y p a s s C a p a c ito rs :
A 2 1 4 3 -2 0
H ig h L e v e l
A u d io R e tu rn
(4 -w ire m o d e re q u ire d
fo r A A -1 0 0 /A A -1 0 0 E )
C u t re s is to r R 1 0 0 to
e n a b le h ig h le v e l a u d io
A A -12 0 /
o u tp u t w irin g s u p e rv is io n
A A -1 20 E
H ig h Le ve l
In fo u r-w ire m o d e .
A ud io O U T
Speaker Switching
Speaker Switching Circuit – NFPA Class B
Speakers m ust be Listed for fire protection
Maxim um Load: 43.75 watts m ax.
up to 70.7 VRMS
(.35 power factor)
47K EOL
Resistor
A2143-00
Cut resistor R100 to enable
high level audio output
wiring supervision in
four-wire m ode.
u p to 7 0 .7 V R M S
(.3 5 p o w e r fa c to r)
E O L
R e s is to r
is in te rn a l
a t te rm in a ls
8 a n d 9
1 0 0 µ f, 1 0 V
N o n -p o la riz e d
< 1 0 µ A le a k a g e
9
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