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www.redbackaudio.com.au
Redback® Proudly Made In Australia8
Redback® Hearing Loop Ampliers
Setup
2.2 EWIS INPUT
The A 4210/12 ampliers have a dedicated EWIS input for emergency situations.
The A 4565 controller is designed around industry standard building emergency alert/evacuate requirements. When con-
nected to a paging system amplier, building occupants can be alerted and/or evacuated in the event of an emergency
e.g.: re, gas leak, bomb scare, earthquake.
Figure 2.1 demonstrates how to connect the A 4565 controller to the A 4210/12 amplier.
The output of the A 4565 Evacuation controller is connected to the EWIS Input of the A 4210 using dual RCA leads. The
output level of the signal from the Evacuation controller is set by the EWIS volume adjustment on the front of the
A 4210/12 amplier.
The A 4210/12 has an in-built VOX circuit, which is activated when a signal is applied to the EWIS input. The VOX
sensitivity of the EWIS input is adjusted via the (Alert/Evac Level) trimpot adjustment on the front panel. Once the VOX
is activated the Mic, Line and AUX inputs will be overridden, and the audio from the EWIS input will be output. (See DIP
switch settings for more info on enabling the VOX Triggering).
Fig 2.1
Other Emergency Tone Generators
RISK OF ELECTRIC SHOCK
OPEN BY QUALIFIED
PERSONNEL ONLY
!
CAUTION
+
–
240V AC @ 50Hz
Line Mic
OUTPUT
L
R
Aux
Ewis
L
R
Vox
Sens.
+24V DC FUSE -24V DC FUSE
Made in Australia by
Altronic Distributors Pty Ltd
www.altronics.com.au
DIP Switch Options
SW
1
2
On Off
Vox enabled Vox disabled
Phantom Power Off
3 Not Used
4 Phantom Power On
Not Used
DIP
Switches
2 1
3
ON
1 2 3 4
2 1
3
A 4565 ALERT/EVAC CONTROLLER
A 4210/12 AMPLIFIER
PHASE
SHIFT
(When Internal
module fitted.)
DC FUSE
24V DC
IN
1 2 3 4 5 6 7 8
+
_
DC FUSE
(2A M205)
L
R
Audio
In
Chime
Vol
Fire
DIP Switches
Interface
Alert
24V Out
Fire
24V Out
Evac
24V Out
To Paging
Console
IMPORTANT NOTE
Ensure power is switched off when
adjusting DIP switches. New
settings will be effective when
power is switched back on.
24V DC
IN
(16GB Maximum)
V/Over
Vol
SD Card
1 2 3 4 5 6 7 8
To Wall Plates
+-
Bell
24V Out
Common
24V Out
All switched outputs limited to 120mA maximum current draw
Contacts
Evac
Alert
Bell
Cancel
3
4
(Maximum 500mA per output)
Made in Australia by
Altronic Distributors
Pty Ltd
www.redbackaudio.com.au
L
R
L
R
BGM
Volume
Audio
Out
BGM
In
Fire
Vol
Bell
Vol
Evac
Vol
PA Mic
Vol
N/C
N/O
N/C
N/O
N/C
N/O
N/C
N/O
N/C
N/O
1
2
A 4574
Alert/Evac Tone Generator
A 2070B
Alert/Evac Tone Generator
A 1741B
MP3/SD Tone Generator
A 4595A
School Lockdown Controller
A Fire Evacuation System can be con�gured when the A 4210/12 is complemented with an Emergency Tone Generator or
Evacuation Controller such as the A 4565 as shown in Fig 2.1.