www.redbackaudio.com.au
Redback® Proudly Made In Australia
2
Redback® A 4574
Alert/Evac/Chime Tone Generator
1.0 Overview
This unit has provision for playback of Alert, Evacuation and chime tones as well as an alert and/or emergency message.
When connected to a paging system amplifier, building occupants can be alerted and/or evacuated in the event of an
emergency e.g.: fire, gas leak, bomb scare, earthquake.
The Alert, Evacuation, Bell, and Emergency Messages are all MP3 based and stored on a Micro SD card which is accessible
from the front of the unit. The Alert, Evacuation and bell tones and cancel function are triggered by the front switches, or
by the rear terminal contacts for remote activation i.e. a clock, remote switch or optional A 2078B and A 2081 remote wall
plates.
It features 24V DC switched outputs which are enabled when the Alert, Evac or Chime tones are triggered. It is powered
from a 24V DC source (plugpack supplied) and features a line out facility and MP3 based Message Voice Over.
2.0 Features
3.0 Front Panel Guide
The layout of the A 4574 front panel is shown below in figure 1.
Fig 1.
1
Alert Tone Activation Switch
This switch is used to activate the Alert tone. Press for 2 seconds to activate.
2
Evac Tone Activation Switch
This switch is used to activate the Evacuation tone. Press for 2 seconds to activate.
3
Bell Tone Activation Switch
This switch is used to activate the Bell tone.
4
Cancel Tone Activation Switch
This switch is used to cancel the Alert, Evac or Bell tones. Press for 2 seconds to activate.
5
Micro SD Card
This is used to store the MP3 audio files for the Alert, Evac, Bell and Message playback.
6
Fault Indicator
This LED will illuminate when the unit has trouble reading an MP3 file or if files are missing from the Micro SD card..
7
On Indicator
This LED indicates the unit has power.
8
Standby Switch
When the unit is in standby mode this switch will illuminate. Press this button to switch the unit ON. Once the unit is ON the
On indicator will illuminate. Press this switch again to put the unit back in standby mode.
Timer
Tone Generator
A 4574
Evac
Standby
Micro
SD Card
Power/
Evac
Alert
Bell
Cancel
Hold for 2 seconds
Hold for 2 seconds
Hold for 2 seconds
Fault
On
1
2
3
4
5
6
7 8
• Level controls for alert/evac, bell and voice over
• Front panel alert/evac/bell and cancel switches
• All tones MP3 based
• Alert/Evac Emergency tones can be configured for
momentary or continuous operation
• 1U half rack cabinet
• Alert and Evac Tones conform to AS 1670.4
(Library included on Micro SD card)
• Compatible with fire indicator boards & break glass
alarms
• Remote operation of alert , evac, bell tones & cancel.
• Local operation of alert, evac and bell
• MP3 based Alert and Evacuation Voice over message
facility
• Bell chime facility
• Switched 24V DC outputs for override relays or strobes
(outputs limited to 120mA)
• On-board timer for remote alert activation adjustable
from 30secs to 7.5min in 30 second increments. Switches
from alert to evac after preset time.
• Auxiliary level output
• 10 year warranty
• Australian designed and manufactured
