Amplifiers

50W 24V Amplifier

Product Overview

The Pertronic 50W Amplifier (EVAC50W24V) is an evacuation amplifier with integral evacuation tone and message generator, designed for use in fire alarm systems with supervised 100 Volt-Line audio distribution. The amplifier delivers up to 50 Watts of audio power to the 100 Volt-Line.

The EVAC50W24V is able to generate up to three pre-configured tones. An optional pre-amplifier provides local microphone and remote audio inputs.

Each of the amplifier’s three tones can be selected from 47 available options. The factory default tones are: NZS 4512:2010 Evacuation signal, with verbal message; NZS 4512:2010 Alert signal with verbal message; and a Simulated Bell tone. The third tone provides for non-emergency applications. For example, in a school, the third tone may signal start and finish times for classes.

There are three methods of controlling tone output from the amplifier:

  1. The external RS-485 bus from any Pertronic analogue addressable fire alarm panel activates any one of the three pre-configured tones
  2. Switch or relay contacts connected to the amplifier’s TONE CONTROL inputs are able to activate any one of the three pre-configured tones
  3. A positive DC voltage applied to the amplifier’s BELL input activates one selected tone

An optional microphone pre-amplifier provides a local microphone input (MIC) and press to talk (PTT) control. The PTT may be configured to silence the integral tone generator. Alternatively, the tone generator may be configured to over-ride the MIC and PTT inputs. The pre-amplifier also has a line level input for connecting an external audio source.

When not broadcasting audio, the amplifier continuously checks for faults on the 100 Vrms line by driving a small DC current through the output wiring, which must be correctly terminated with an end of line resistor. It is important to note that every speaker connected to the supervised 100 Volt-Line must incorporate a DC-blocking capacitor.

Features

  • Default Alert and Evacuation tones with verbal messages as in NZS 4512:2010
  • Each of the amplifier’s 3 tones may be chosen from 47 available options, configurable using on-board rotary and DIP switches
  • Verbal message duration: up to 20 seconds
  • Custom tones and / or messages available on special order
  • Delivers up to 50 W to connected speakers
  • Optional pre-amplifier suitable for public address microphone or fire microphone
  • Operates from 24 Volt (nominal) DC power
  • Controllable by panel RS-485 bus, TONE CONTROL inputs, or BELL input
  • Overload and short-circuit output protection
  • Fault (DEFECT) LED displays a pattern of short and long flashes to identify any faults that have been detected
  • Supervisory system operates when not broadcasting audio and can detect:
    • Short and open-circuits on the 100 Volt-Line
    • Power supply faults
    • Overload conditions
    • Low power output
    • RS-485 communication faults
    • Missing pre-amp (if appropriate)

Tones

Tone 01 Evacuation Tone with Voice Tone 25 660 Hz 1.5s on, 1.8s off intermittent
Tone 02 Evacuation Tone Tone 26 1.4 kHz - 1.6 kHz 2 Hz
Tone 03 Alert Tone with Voice Tone 27 660 Hz continuous
Tone 04 Alert Tone Tone 28 544 Hz / 440 Hz alternating
Tone 05 T3 Cadence with Voice Tone 29 544 @ 0.875s intermittent
Tone 06 T3 Cadence Tone 30 800 Hz @ 2 Hz intermittent
Tone 07 Simulated Bell Tone Tone 31 800 / 1000 Hz @ 25 Hz sweeping
Tone 08 PA400 Tone Tone 32 2400 / 2900 @ 25 Hz sweeping
Tone 09 Claxon (star trek) Tone 33 554 Hz continuous
Tone 10 400 - 700 Hz 1.5 sec whoop Tone 34 440 Hz continuous
Tone 11 800 / 1000 Hz @ 1 Hz sweeping Tone 35 800 / 1000 Hz @ 7 Hz sweeping
Tone 12 400 / 450 Hz @ 0.5 Hz alternating Tone 36 660 / 1200 Hz @ 1 Hz sweeping
Tone 13 2400 / 2900 Hz 7 Hz sweeping Tone 37 1000 & 650 Hz two-tone chime 
Tone 14 2400 / 2900 Hz 1 Hz sweeping Tone 38 745 Hz @ 1 Hz intermittent
Tone 15 500 / 1200 Hz @ 1 Hz sweeping Tone 39 1000 & 2000 Hz @ 0.5s alternating
Tone 16 1200 / 500 Hz @ 1 Hz DIN / PFEER Tone 40 1000 Hz continuous PEEER Toxic Gas
Tone 17 2400 / 2900 Hz @ 2 Hz alternating Tone 41 2000 Hz continuous
Tone 18 1000 Hz @ 1 Hz intermittent Tone 42 1200 Hz continuous
Tone 19 800 / 1000 Hz @ 0.875 Hz alternating Tone 43 800 Hz / 1000 Hz @ 4 Hz alternating
Tone 20 2400 Hz @ 1 Hz intermittent Tone 44 500 Hz – 1400 Hz @ 5 Hz repetition RH3 Tone
Tone 21 800 Hz 0.25s on, 1s off intermittent Tone 45 'SOS' in Morse code
Tone 22 800 Hz continuous Tone 46 300 Hz - 1400 Hz - 300 Hz sweep
Tone 23 660 Hz 150 ms on / off intermittent Tone 47 3480 Hz 130 ms on / off
Tone 24 544 (100 ms) / 440 Hz (400 ms) NF S 32-001