Summary of Contents for EDWARDS SYSTEMS TECHNOLOGY AA75 Series
- Page 1 AA75 Series Audio Amplifiers Installation Manual P/N 270218 Revised 14JUL97 firealarmresources.com...
- Page 2 Copyright © 1997 Edwards Systems Technology, Inc. This manual and the products it describes are copyrighted by Edwards Systems Technology, Inc. (EST). You may not reproduce, translate, transcribe, or transmit any part of this manual without express, written permission from EST.
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Page 3: Table Of Contents
Single-Channel Audio System Configuration Single-Channel Audio System Configuration With SIGA-CC1 Module 20 AA75 Amplifier Backup Using “B” Riser 21 AA75 Amplifier Backup Using ARA-1 Relay AA75 Amplifier Backup Per IRC-3 Enclosure Remote Paging 24 Maintenance and Troubleshooting AA75 Series Audio Amplifiers Manual firealarmresources.com... - Page 4 Edwards Systems Technology, Inc. The distribution of information contained within this manual to unauthorized persons shall constitute a violation of any distributor agreements and may result in implementation of legal proceedings.
- Page 5 Document history AA75 Series Auido Amplifiers Installation Manual P/N 270218 Revision Status Revision Date Reason For Change September 1995 Initial Release. July 1997 Layout and content revisions. AA75 Series Audio Amplifiers Manual firealarmresources.com...
- Page 6 AA75 Series Audio Amplifiers Manual firealarmresources.com...
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Page 7: Description
24 VDC power supply source within the Fire alarm control panel. The AA75 series amplifiers are inherently power limited. If a short or continuous overload is sensed, the output will be shut down and an amplifier trouble relay is activated. The amplifiers contain three LED status indicators. - Page 8 INDICATES INPUT LEVEL TOO LOW. INPUT LEVEL WARNING HIGH VOLTAGE -Disconnect primary and secondary AMPLIFIER TRBL power before servicing. AUDIO AMPLIFIER MODEL AA75T-25 FOR FIRE PROTECTIVE SIGNALING USE EDWARDS SYSTEMS TECHNOLOGY [AA75-003.CDR] Model AA75T-25 AA75 Series Audio Amplifiers Manual firealarmresources.com...
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Page 9: Specifications
6 - 8 (Requires DAPM-R on the input) Input power* (Standby) Voltage (24Vdc) 24 Vdc Current 250 mA Full load current 3.44 A Max ripple Fail relay contacts: Voltage max 30 Vdc Current max (resistive) 500 mA AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 10: Installation
CONTROL MODULE CM1(N) - CM2(N) AA75 SERIES AMPLIFIER [AA75-010.CDR] CAB 3 Setup The following illustrates the mounting hardware for this type of installation. AMPLIFIER COVER #6 SCREWS AMPLIFIER PART OF CAB2/3/6 [AA75-011.CDR] Mounting Hardware AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 11: Model Aa75-25
Aux Input (TB2-1 - TB2-3): Not used. Fail/Notify (TB2-4 - TB2-6): Form C contacts that transfer when an internal amplifier fault prevents Audio Power Output, or amplifier has no power; contacts are shown energized. AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 12: Model Aa75P-25
The following options must be selected and/or setup during the installation of each amplifier. Refer to the diagram below for preamp card component locations and to the chart on the next page for setup procedures for the AA75 series amplifiers. GAIN ADJ. - Page 13 DC Input (24 VDC input): Input power must be supplied from a PS4/8B or APS4/8B. When a APS8B or PS8B supply is used, the second 24 VDC Note: output on the supply must NOT be used for anything. AA75 Series Audio Amplifiers Manual firealarmresources.com...
- Page 14 Green LED is ON and the Red is OFF. Use a DVM on AC scale and measure 25VRMS on the output riser. Check under load conditions. AA75 Series Audio Amplifiers Manual firealarmresources.com...
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Page 15: Model Aa75T-25
Refer to the figure below for the terminal nomenclature and component locations for amplifiers with integral page microphone and tone generator. INPUT POWER CONNECTOR GAIN ADJ. PREAMP CARD TONE CARD FAIL/NOTIFY AUXILARY INPUT IN SHLD CB-1 [AA75-008.CDR] Model AA75T-25 AA75 Series Audio Amplifiers Manual firealarmresources.com... - Page 16 The following features and options must be selected or setup during the installation of each amplifier. Refer to the following figure for component locations on the preamp card to properly setup the models AA75T series amplifiers. AA75 Series Audio Amplifiers Manual firealarmresources.com...
- Page 17 J2 / J3 J1 - ON, J2 - ON = 1KHz J1 - ON, J2 & J3 - OFF = 600Hz J1 - OFF, J3 - ON = SLOW WHOOP TONE CARD [AA75-009.CDR] Tone Card AA75 Series Audio Amplifiers Manual firealarmresources.com...
- Page 18 Microphone Tone Card Setup Function Slow Whoop ---- 1K Hz ---- 600 Hz AA75 Series Audio Amplifiers Manual firealarmresources.com...
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Page 19: Operation
This section will only provide the basic operation of the AA75 series amplifiers and how the different control inputs will affect system operation. Model AA75-25 Amplifier... -
Page 20: Model Aa75T-25 Amplifier
J1/J2/J3 on the Microphone/tone card. If the AUX ACTIVATE terminal is connected to common the device connected to the AUX INPUT will be amplified instead of the tone generator signal. AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 21: Wiring Methods
TB1-3 and/or TB1-6 to Earth Ground. The 25V audio riser must be twisted cable and sized according to the chart on this page. AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 22: Amplifier Signal Flow Diagrams
G ENERATOR xxxxxx ALARM TONE RETURN GENERATOR 25 VRMS AUDIO SENSE CH1/2 xxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxxx AUX ACT ACTIVATE FAIL/ IN/OUT NOTIFY IN IN SHLD PRE-AMP LEVEL AUDIO xxxxx CONTROL WIRING [AA75-013.CDR] AA75P-25 Signal Flow Diagram AA75 Series Audio Amplifiers Manual firealarmresources.com... - Page 23 25 VRMS AUDIO ALARM TONE GENERATOR xxxxxx RETURN 25 VRMS AUDIO SENSE CH1/2 xxxxxxxxxxxxxxxxxxxx AUX ACT ACTIVATE FAIL/ IN/OUT NOTIFY IN IN SHLD PRE-AMP LEVEL AUDIO xxxxx CONTROL WIRING [AA75-014.CDR] AA75T-25 Signal Flow Diagram AA75 Series Audio Amplifiers Manual firealarmresources.com...
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Page 24: Application Drawings
1 2 3 4 5 6 PS8B SMK #1 24VDC SUPERVISED FCCA DAPM CH 1 FIRE SHLD SHLD CH 2 AA75 AMPLIFIER OTHER SHLD CH1/2 PREAMP OUT TB1 IN TB2 OUT [APP-004.CDR] PREAMP AUX ACT ACTIVATE IN/OUT AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 25: Single-Channel Audio System Configuration
CH 2 AA75 AMPLIFIER OTHER SHLD CH1/2 PREAMP OUT TB2 OUT TB1 IN PREAMP AUX ACT ACTIVATE IN/OUT To riser terminals on CM1(N), CM2(N) or RZB12-6 AA75 AMPLIFIER CH1/2 AUX ACT ACTIVATE IN/OUT [APP-002.CDR] AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 26: Module
Wiring Practices Manual P/N 387020. CH1/2 Power limited circuit. AUX ACT If a AA75P-25 is used in the system an ACTIVATE FCCA may not be used. IN/OUT (A75SCAD1.CDR) Break wire run to provide supervision [AA75-016.CDR] of connection. AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 27: Aa75 Amplifier Backup Using "B" Riser
Spare amplifier may be model AA75 or larger [AA75-017.CDR] amplifier depending upon total backup requirements. Power supplies not shown. A DAPM must be used in conjunction with a FCCA. THIS IS A CONCEPTUAL DRAWING ONLY AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 28: Aa75 Amplifier Backup Using Ara-1 Relay
Spare amplifier may be model AA75 or larger amplifier depending upon total backup requirements. Power supplies not shown. A DAPM must be used in conjunction with a FCCA. [AA75-018.CDR] THIS IS A CONCEPTUAL DRAWING ONLY. AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 29: Aa75 Amplifier Backup Per Irc-3 Enclosure
Zone 4 must have 15K EOL at the ARA-1 relay and ARA-1 ACTIVATE IN/OUT must be polarized. This relay switches in back-up amp. Relay must be programmed similar to an output ckt. FROM AA75 APS4B [AA75-019.CDR] AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 30: Remote Paging
1 2 3 PREAMP 1 TROUBLE PREAMP 1 CH2 ADJ SPEAKER Ω 1.8 K EOL P/N 260044 ACTIVATE 2000 Feet Max. Using 18 AWG Wire AUDIO OUTPUT 1 Vrms AUX AUDIO INPUT 24 VDC [AA75-020.CDR] AA75 Series Audio Amplifiers Manual firealarmresources.com... -
Page 31: Maintenance And Troubleshooting
2. Too low input signal. 3. J1 (preamp card) set incorrectly. Amplifier trouble led 1. Audio riser not returned to audio return on, tone/page okay: terminals. 2. J2 on preamp card incorrectly set. AA75 Series Audio Amplifiers Manual firealarmresources.com... - Page 32 AA75 Series Audio Amplifiers Manual firealarmresources.com...