Advanced AXIS AX AV-VBM

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3.2 AV-AMP-80 Audio Amplifier Module

The AV-AMP-80 audio amplifier module provides the digital audio capabilities (live voice communications with AV-

VBM) of the AV-VBM audio panel w/microphone and AV-VB distributed audio booster and requires 24 VDC nominal

power from the AX-PSU-6 (see figure 4).

The AV-AMP-80 contains two (2) electrically independent Class “A” or “B”, 40 Watt @ 25 Vrms, amplifiers (Audio

Notification Appliance Circuits - ANACs) [controlled together or amplifier two dedicated as a backup to amplifier

one]. Each amplifier (audio notification appliance circuit) is activated whenever one of the AV-AMP-80 trigger inputs

is activated (trigger input activation on AV-VBM is via the AV-SM switch/LED module).

In addition to providing the two (2) electrically independent amplifiers (audio notification appliance circuits), the AV-

AMP-80 has an integral two (2) programmable, flash-based, digital message/tone generator. Messages are freely

programmable and can be tailored to meet specific installation requirements.

There are three (3) trigger inputs on the AV-AMP-80 (two of these, trigger input 1 and trigger input 2, are prewired

on the AV-VBM to the AV-SM switch/LED module) for activating the audio amplifiers; trigger input 1, trigger input 2

and trigger input 3.

Trigger input 1 when activated, not only turns on both amplifiers (audio notification appliance circuits) it also

activates programmed message/tone #1 and plays this message over the audio notification appliance

circuits. Trigger input 1 has a higher priority than trigger input 2. If both trigger inputs are active at the same

time, programmed message/tone #1 will be broadcasted.

Trigger input 2 when activated plays message/tone #2 on both amplifiers (audio notification appliance

circuits).

Trigger input 3 sets the AV-VBM audio panel w/microphone and/or AV-VB distributed audio booster to

“booster mode”, this allows any external audio signal ( 25vrms) to be broadcasted out of one or both of the

AV-AMP-80 amplifiers (based on wiring). This trigger input has the highest priority, if both trigger input 1

and 2 are active during a trigger input 3 activation, amplifiers will broadcast the external audio signal. This is

how live voice communications are broadcasted through the AV-VB distributed audio booster amplifiers. By

activating trigger input 3 on the AV-AMP-80 of the AV-VB distributed audio booster, microphone

communications from an Axis

integrated audio intelligent fire alarm control panel, an AV-VBM audio panel

w/microphone or a host EVAC system can be rebroadcasted out of the AV-VB distributed audio booster

amplifiers.

Designed into the AV-AMP-80 is a dedicated Form “C” trouble relay contact which transfers on any amplifier and/or

audio notification appliance circuit trouble/failure. This trouble/fault relay contact is prewired in the AV-VBM to the

AV-SM switch/LED module. In the AV-VB the trouble/fault relay contact must be monitored by the host fire alarm

control panel.

Note: The trouble relay contact, in addition to the power supply charger trouble/fault relay contact, located

on the AX-PSU-6 power supply charger, are prewired in the AV-VBM panel to the AV-SM switch/LED

module. These contacts located in both the AV-VBM and AV-VB must be monitored by the host fire alarm

control panel to maintain proper supervision of the AV-VBM audio panel w/microphone and AV-VB

distributed audio booster. If the AV-VB is utilized as a PBUS (485) amplifier trouble/fault monitoring is

accomplished by the AX-CTL base card via the PBUS (485) connection.