GAI-Tronics 69253-001 Audio Generator Interface PCBA - Manual

Pub. 42004-601L2
GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA
610-777-1374 „ 800-492-1212 „ Fax: 610-796-5954
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G A I - T R O N I C S ® C O R P O R A T I O N
A H U B B E L L C O M P A N Y
69253-001
Audio Generator Interface PCBA
Confidentiality Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains sensitive
business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics
retains all intellectual property and other rights in or to the information contained herein, and such
information may only be used in connection with the operation of your GAI-Tronics product or system.
This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third party.
Introduction
The GT1000/5000 Emergency Notification and Communication System is designed for use in harsh
industrial environments. The 69253-001 Audio Generator Interface (AGI) is an integral assembly in this
system. The AGI is responsible for generating the tone messages that are broadcast over the system
speakers during emergency conditions. The 69254 Series Master Control Unit (MCU) and the AGI
maintain constant communication links. These links are continually supervised by both the MCU and the
AGI to verify proper working condition.
How to Use the Assembly
The AGI contains four tone sources:
• Primary Alarm Generator • Backup Tone Generator
• Fail-safe Tone Generator • Supervisory Tone Generator
The AGI controls the Fail-safe Tone Generator. The Master Control Unit regulates the output of the
Back-up and the Supervisory Tone Generators. The MCU also controls the Primary Alarm Generator.
The following information defines the purpose of each tone generator.
Primary Alarm Generator
The Primary Alarm Generator produces alarms from a library of tones upon command from the MCU. If
multiple alarms are activated, the Primary Alarm Generator plays the alarm tones in the order they are
received according to their priority. The MCU communicates with the Primary Alarm Generator via the
control rack backplane. The MCU uses this communication path to supervise the Primary Alarm
Generator. The MCU performs this function by periodically commanding the Primary Alarm Generator to
play a pre-determined tone.