Johnson Controls Metasys AA-30 User manual

Fire Management Accessories Manual 445
Audio Amplifiers Section
Technical Bulletin
Issue Date 0394
© 1994 Johnson Controls, Inc. 1
Order No. 445-020
Introduction Page 3
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Description 3
Installation Procedures 5
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Mounting the AA-30 5
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Connecting the AA-30 Amplifier 7
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Adjusting the AA-30 Audio Gain Level 9
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4-Wire Supervision for Audio Amplifiers 10
Audio Amplifier (AA-30)

2 Audio Amplifiers—Audio Amplifiers (AA-30)

Audio Amplifiers—Audio Amplifiers (AA-30) 3
Introduction
The AA-30 Audio Amplifier provides 30 watts of audio power compatible
with 25 VRMS speakers. Speaker zone selection is performed by an
XPC-8 transponder or M500CJ/M510CJ control module in
IFC-1010/2020 systems. Speaker zones may be up to 30 watts each, but
are limited to ten speakers per M510CJ control module employed. The
indicating appliance circuit for XPC-8 modules does not have a speaker
limit.
The AA-30 has a set of normally open trouble contacts for built-in
supervision. The contacts close to report an input power brownout, loss of
batteries, failure of audio output wiring (if configured for 4-wire output),
or amplifier failure. Individual LEDs signal each source of trouble to aid
in troubleshooting. During total loss of primary power, all LEDs are
extinguished to conserve battery power. An AA-30 can also be configured
as a backup amplifier for one or more AA-30s. In the event of an
amplifier failure, backup amplifier switching is automatic.
Table 1: Specifications
Dimensions (H x W x D) 7.0 x 8.5 x 4.3 in. (178 x 216 x 109 mm)
Weight 6.0 lbs. (13.2 kg)
Rated Output 30 watts RMS
Output Voltage 25 VRMS
Total Harmonic Distortion at 1 KHz 0.5%
Frequency Response (+ 3, - 1 dB) 220 - 22,000 Hz
120 VAC Power Consumption Standby: 208 mA
Alarm: 0.9 A
24 VDC (battery) Power
Consumption Standby: 21 mA
Alarm: 3.4 A
Agency Listings UL, FM, CSF, BS&A, ULC
Description

4 Audio Amplifiers—Audio Amplifiers (AA-30)

Audio Amplifiers—Audio Amplifiers (AA-30) 5
Installation Procedures
The AA-30 mounts in a CHS-4L Chassis. Two AA-30s can be placed side
by side in a CHS-4L. The AA-30 may be mounted either in the same
cabinet as the AMG-1 or in a remote cabinet.
See Figure 1 for more information on installing the AA-30.
Mounting the
AA-30

6 Audio Amplifiers—Audio Amplifiers (AA-30)
Figure 1: Mounting the AA-30 in the CHS-4L Chassis
FFCC10
Step 1
Install the CHS-4L chassis in each row of the cabinet that will employ AA-30
audio amplifiers. For proper grounding of the AA-30 audio amplifiers to the
cabinet, connect a grounding cable to one of the chassis mounting screws as
illustrated.
Step 2
Position the lower end of the AA-30 audio
amplifier into the slot in the bottom of the
CHS-4L chassis.
Step 3
Secure the AA-30 audio amplifer to the
CHS-4L with the washers and nuts
provided.

Audio Amplifiers—Audio Amplifiers (AA-30) 7
Figures 2 and 3 depict the wiring at the AA-30. Figure 2 identifies the
terminal assignments on the back board as well as the over all chassis
layout. Figure 3 shows the termination assignments on the front board.
Primary (AC) Power
Earth Ground
Hot Neutral
In Out In Out
Secondary (DC) Power
+ 24 VDC
System Common
FFCC08
Audio Amplifier Gain Adjust
Audio Input and Output Connectors for Remote Mounting (See Figure 3.)
Audio Input and Output Terminals for Mounting in the Same Cabinet (See Figure 3.)
Figure 2: AA-30 Back Board Terminal Assignments
Notes: Primary (AC) and secondary (24 VDC battery) power must be
connected to each AA-30. You must also provide some means of
charging the batteries.
Connecting the
AA-30 Amplifier

8 Audio Amplifiers—Audio Amplifiers (AA-30)
Figure 3: AA-30 Front Board Terminal Assignments
Notes: The audio output (Terminals 5 and 6 of P8 or P6) is not supervised.
Looping the audio output and connecting the return circuit to
Terminals 2 and 3 of P8 or P7 provides supervision unless the
audio output is wired Style Z by returning (looping) the audio
output circuit to Terminals 1, 2, and 3 on P8. Therefore, the
speaker circuit control device (XPC-8 or M510CJ) must be located
in the same cabinet as the amplifier.
Backup Audio Input Signal1 IN
From PreviousAA-30 P8, Terminal10 or
Backup AA-30 P8, Terminal7
Backup Audio Input Signal 2IN
From PreviousAA-30 P8, Terminal9 or
Backup AA-30 P8, Terminal6
Backup Audio Input ShieldIN
From PreviousAA-30 P8, Terminal8 or
Backup AA-30 P8, Terminal5
Backup Audio Input Signal1 OUT
To Next AA-30 P8,Terminal 12
Backup Audio Input Signal2 OUT
To Next AA-30 P8,Terminal 11
Backup Audio Input ShieldOUT
To Next AA-30 P8,Terminal 10
Audio Output Signal 1
First XPC-8 P3 or P5 or P7 or P9
Audio Output Signal2
First XPC-8 P3 or P5 or P7 or P9
Audio Output Shield
From Speaker IAC Shield(s)
Style Z Return for Audio OutputSignal 1
Last XPC-8 P4 or P6 or P8 or P10
Style Z Return for Audio Signal Output Signal 2
Last XPC-8 P4 or P6 ro P8 or P10
Style Z Return for Audio Output Shield
From Speaker IAC Shield(s)
P8
FFCC08
Style Z Return for Differential 25 VRMS
Audio Output Signal To XPC-8 P10
Differential 25 VRMS Audio Output
Signal To Primary AA-30 P4
or XPC-8 P3
Backup Differential 25 VRMS Audio
Input Signal OUT To Next AA-30 P4
Backup Differential 25 VRMS Audio
Input Signal IN To Backup AA-30 P6
or Previous AA-30 P5
Nomally Open Trouble Contacts
(Generally Not Used When AA-30 is
Transponder Mounted)
Low Level Audio Output 1 to Next
AA-30, P3 Terminal 4, or AMG-1, P4,
Terminal 1, or to 470 ohm Resistor
Low Level Audio Output 2 to Next
AA-30, P3 Terminal 5 or to AMG-1, P4,
Terminal 2, or to 470 ohm Load Resistor
Audio Input Shield OUT
To AMG-1 P4, Terminal 6
Low Level Audio Input 1
From AMG-1, P4, Terminal 4
Low Level Audio Input 2
From AMG-1, P4, Terminal 5
Audio Input Shield IN
From AMG-1 P4, Terminal 6
No Connection
Differential Low Level Audio Input Signal IN
From AMG-1 P5
Differential Low Level Audio Input Signal
OUT To Backup AA-30 P2 or Next AA-30
Normally Open Trouble Contacts IN
From AMG-1 P9 or AA-30 P9 or XPP-1 P6
Normally Open Trouble Contacts OUT
To AA-30 P10
(No Connection on Last AA-30)

Audio Amplifiers—Audio Amplifiers (AA-30) 9
The Audio Gain Level multi-position rotary switch allows you to adjust
the gain of the audio output signal to compensate for audio line losses.
After you have made the correct adjustment, the AA-30 Audio Amplifier
produces its maximum rated output power at 25 VRMS. After installing
all of the AA-30 amplifiers, follow this procedure:
Use a small slotted screwdriver to position the rotary switch until the
Normal Level LED on the AA-30 is lit and the Incorrect Level LED turns
off. Once this is achieved, the audio gain is properly adjusted. See the
figure below.
Speaker Trouble LED
An open circuit condition in the 4-wire speaker loop.
Amplifier Trouble LED
Loss of the audio input signal or trouble in the audio in or audio
out circuitry.
Battery Trouble LED
The secondary (DC) power source has fallen below a suffficient
voltage level.
Brownout LED
The primary (AC) power source has fallen below a sufficient level.
Note: During a complete loss of AC, no LEDs will light on the AA-30.
Incorrect Level LED
During normal (non-alarm) conditions, this LED indicates that
the AA-30 is out of adjustment. When this LED is on and the
Normal Level LED is off, the audio level has been adjusted too
low. When both this LED and the Normal Level LED are on, the
audio level has been adjusted too high.
Normal Level LED
During normal (non-alarm) conditions, when this green LED is
on and the Incorrect Level LED is off, the AA-30 is adjusted
properly and operating correctly.
FFCC08
Audio Gain Switch
P3
P1
P10 P9
P1
P2 P6 P7 P4 P5
Figure 4: Adjusting the Audio Gain
Note: When the AA-30 is operating on secondary power, no LEDs light
in order to conserve power.
Adjusting the
AA-30 Audio
Gain Level

10 Audio Amplifiers—Audio Amplifiers (AA-30)
The amplified audio output circuit is not supervised if configured as
Style Y (2-wire). Supervision is unnecessary, in most jurisdictions, if the
amplified audio wiring is contained within an enclosure such as a
transponder. If the amplified (high level) audio wiring extends outside the
transponder, it should be supervised.
To enable supervision of the audio output circuit, configure it as Style Z
(4-wire) by cutting resistors R8 and R9 on the AA-30 amplifier. The two
resistors, R8 and R9, are located right below P6 on the AA-30 as shown in
Figure 5.
P8
aa30
P5 P6P4
P10 P9P1
P2 P7
P3
R9 R8
Figure 5: Resistors R8 and R9 on the AA-30
AA-30 Amplifier
Supervision
Setup

Audio Amplifiers—Audio Amplifiers (AA-30) 11
Notes

12 Audio Amplifiers—Audio Amplifiers (AA-30)
Notes
Controls Group FAN 445
507 E. Michigan Street Fire Management Accessories Manual
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53201