Wiring Multiple Audio Amplifiers; 1: Two Primary Aa-30S Without Backup - Honeywell NOTIFIER AA Series Installation Manual

Analog audio amplifiers for dvc-ao applications
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Wiring Multiple Audio Amplifiers

When finished installing all amplifiers and associated circuitry, adjust the audio gain as follows:
1.
Locate the Audio Gain Rotary Switch on AA-30 (Figure 3.6) or AA-100 and AA-120 (Figure 3.10).
2.
Use a small common screwdriver to turn the Audio Gain Rotary Switch until the Normal Level LED and Incorrect Level LED are
properly adjusted as shown in Table 3.3.
NOTE: 70.7 Vrms speakers require the 2 watt, 4.7K end-of-line resistors (P⁄N 90224) supplied with the AA-100 Audio Amplifier in place of
the resistors supplied with the speaker-control devices. Systems configured for 70.7 Vrms operation must be wired as Class B.
NOTE: If not using Class A low-level audio return, an R-470 resistor assembly may be installed across P3, pins 4 and 5 of the last directly
connected device on the low-level audio riser; this may help to calibrate the audio amplifier.
3.8 Wiring Multiple Audio Amplifiers
3.8.1 Two Primary AA-30s Without Backup
Figure 3.12 shows the use of two AA-30s without backup and Table 3.4 lists the wiring components used.
The speaker circuits on the first AA-30 share 30 watts from that AA-30; the speaker circuits on the second AA-30 share 30 watts
from that AA-30.
To use high-level audio (25 Vrms output) with four-wire supervision, cut resistors R8 and R9 on the AA-30 (Figure 3.5).
This wiring diagram applies to AA-30 audio amplifiers. Connections to plugs P1, P2, P4, P5, P6, P9, and P10 are identical.
Typical wiring of two primary AA-30 audio amplifiers without using a backup amplifier. This sample shows how to connect to speaker
circuit control modules within cabinet, using Cable 75109:
low-level audio
DVC-AO Outputs
(See DVC Manual for details)
Note: Cables must enter from top of the plug.
*Note: If not using Class A low-level audio return, an R-470 resistor assembly may be installed across P3, pins 4 and 5 of the last
directly connected device on the low-level audio riser; this may help to calibrate the audio amplifier.
AA-series Audio Amplifiers Manual for DVC-AO Applications — P/N 52526:B 8/13/2019
Audio Level
Properly Adjusted
Adjusted too Low
Adjusted too high
Table 3.3 Adjusting the Audio Level
Item
Low-level audio cable
25-volt audio cable
Unamplified
(Twisted-pair,
14-18 AWG)
1, 2, 3, or 4
Figure 3.12 Wiring Two AA-30's Without a Backup Amplifier
Normal Level LED Incorrect Level LED
ON
OFF
ON
Supplied with
AA-30
AA-30
Table 3.4 Wiring Inventory
To Speaker Circuit
Control Modules
inside cabinet
Optional
(e.g. XP6-C, FCM-1)
Cable 75109
Supervised
Return
(High-Level)
First AA-30
Amplifying Audio Messages
OFF
ON
ON
Part Number
75110
75109
To Speaker Circuit
Control Modules
inside cabinet
(e.g. XP6-C, FCM-1)
4-Wire
Cable 75109
Optional
Class A
Audio
Return*
(Low-Level)
Cable
75110
Second AA-30
Optional
4-Wire
Supervised
Return
(High-Level)
17

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