AA-100/AA-120 Audio Amplifiers Installation/Operation Manual — P/N 9000-0573:C 03/12/2020
9
Speaker Switching
Section 2: Speaker Switching
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.
Figure 2.1 Speaker Switching Configuration for the
AA-100/AA-100E (Class B) with AOM-2SFor AOM-MUXF (Class B)
Figure 2.2 Speaker Switching Configuration for the
AA-100/AA-100E (Class B) with AOM-2SF or AOM-MUXF (Class A)
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)
Cut resistor R100 to enable
high level audio output
wiring supervision in
four-wire mode.
AA-100/AA-100E
Upper Board
70 V Transformer
Connection
(AA-120/AA-100E only)
R100
SLC
Module polarities
are shown in alarm
High Level
Audio Return
(4-wire mode required
for AA-100/AA-100E)
Control Module
AOM
AA-100/AA-100E High
Level Audio Out (70.7V)
Supervised
Class 2Power-Limited
Speaker Switching Circuit – NFPA Class B
Speakers must be Listed for fire protection
Maximum Load: 43.75 watts max.
up to 70.7 VRMS
(.35 power factor)
47K EOL
Resistor
A2143-00
Trouble
IN OUT
Audio
IN OUT
Backup
IN
Backup
OUT
AA-120/AA-120E
High Level
Audio OUT
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
o u tp u t w irin g s u p e rv is io n
In fo u r-w ire m o d e .
H ig h L ev 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 -10 0 /A A -1 0 0 E )
A A -1 0 0 /A A -1 0 0 E
U p p e r B o a rd
S L C
M o d u le p o la ritie s
a re s h o w n in a la rm
C o n tro l M o d u le
A O M
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 las s 2 P o w e r-L im ite d
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 .
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
T ro u b le
IN O U T
A u d io
IN O U T
B a c k u p
IN
B ackup
O U T
A A -120/
A A -120E
H igh Level
A udio O U T
B y p as s C a p a c ito rs :
A 2 1 4 3 -2 0
1 0 0 µ f, 1 0 V
N o n -p o la rize d
< 1 0 µ A le ak a g e
70 V Transform er
C onnection
(A A-120/A A-100E only)
R 1 0 0
