Audio Amplifiers 5. Voice Alarm Systems
Unimode 400 Operations PN 50709:A 10/20/97 35
Audio Amplifiers
Overview Audio Amplifiers provide audio power for the Voice Audio System. The control panel
supports three models of audio amplifiers as listed in Table 31:
Table 31 Audio Amplifier Models
Audio Amplifier
Features Audio amplifiers provide the following features:
•Built-in Supervision Each audio amplifier contains a set of normally-open
trouble contacts that close to light an LED showing the type of trouble. Types of
trouble include: brownout, loss of low-level supervision tone at the input, battery
failure, audio output wiring failure (if set for four-wire output), and amplifier
failure. During total loss of primary AC power, all LEDs extinguish to conserve
battery power.
•Backup You can set up an audio amplifier as a backup amplifier for multiple
amplifiers. If an amplifier fails, the control panel automatically switches to the
backup amplifier.
•Speaker zone selection Set by control-by-event or set manually using control
switches on the VCM-4, DCM-4, or ADT-ACM-16AT modules.
Amplifier Audio Power Speaker Circuits
AA-30
See Figure 36 on page 36 30 watts – compatible with
25Vrms speakers. up to 30 watts each.
AA-100
See Figure 37 on page 37 100 watts of 70.7Vrms audio. up to 100 watts each.
AA-120
See Figure 37 on page 37 120 watts of 25Vrms audio. up to 120 watts each.