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This chapter describes the operating characteristics of the AVL-1. Included is information about the following AVL-1 features:
•
Message Memory
•
Input and Output Options
•
Message Files
•
Output Channels
•
File Priority
•
Playing Files
•
System Pause
•
Supervision
•
Standby Battery Calculations
•
Access Key Password Protection
•
Memory Retention Battery
Message Memory
The AVL-1 has the ability to store up to sixteen minutes of audio. The audio is stored digitally on up to eight memory IC's. Each
memory IC can store up to two minutes of audio messages. See Figure 8 for the socket locations S63 thru S70 on the AVL-1
printed circuit board into which the eight memory IC's, U63 thru U70, are inserted.
These memory IC's are commonly referred to as pseudo static random access memories ("PSRAM's"). If the input power is
disconnected and the memory retention battery is or has been disconnected or discharged, the PSRAM IC's will be erased.
WARNING:IF THE INPUT POWER IS DISCONNECTED AND THE MEMORY RETENTION BATTERY IS OR HAS BEEN
DISCONNECTED OR DISCHARGED, ALL MESSAGES IN THE PSRAM IC'S WILL BE ERASED. IF STORED MESSAGES ARE
ERASED, THEY WILL NOT BE DELIVERED TO THE AUDIO SYSTEM WHEN INPUT POWER IS RESTORED. THIS COULD
RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.
Input and Output Options
Each AVL-1 model includes 8 inputs that can be used to activate file numbers 1 through 8 with a contact closure or a transistor
switch across the corresponding input terminals. The optional digital voice expansion modules ("DV-EM") can provide 32 inputs.
When a DV-EM module is used, the 8 inputs in the AVL-1 unit cannot be used. Up to 8 DV-EM's can be connected to a AVL-1 for
a total of 256 inputs.
WARNING: MAKE SURE THAT AVL-1 OUTPUTS ARE CONNECTED TO A PROPERLY OPERATING, LISTED
COMPATIBLE AUDIO SYSTEM SO THAT MESSAGE FILES ASSIGNED TO THAT CHANNEL CAN BE PLAYED.
The AVL-1 is provided with a serial port, through which up to 999 files can be activated with digital commands. The contact inputs
in the AVL-1 or DV-EM modules can be used along with the serial port. A command is required to start a message, and a second
command is required to stop the message. The operation is similar to closing an input contact (start) and then reopening the
contact (stop).
Up to four audio output channels are available with the AVL-1. The audio output from each channel of the AVL-1 is through a 600
Ohm transformer and is designed to drive a load impedance of 600 Ohms or higher. The audio level of each channel can be
adjusted by a potentiometer on the PC board from -3.8 dBm to +8.2 dBm (0.5 to 2.0 Vrms). All AVL-1 output channels can be
active simultaneously.
AVL-1 Manual
Rev. H August 2000
www.PDF-Zoo.com
Operation
firealarmresources.com
Sheet 11 of 41
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