www.altronics.com.au
Redback® Proudly Made In Australia
8
Redback® A 4480B
8 In to 8 Out Audio Switcher
Overview
10
Power switch
Use this to switch to turn on mains power 220-240V AC.
11
On indicator
This led indicates the unit has power.
12
Keyboard USB input
This USB connection is for a keyboard for programming the LCD.
13 LCD
The LCD is used to indicate which inputs are selected to which outputs.
14
Inputs 1-8 volume controls
Use these to adjust the volumes of the RCA input sources.
1.5 REAR PANEL CONNECTIONS
Fig 1.5A shows the layout of the A 4480B rear panel.
Fig 1.5a
1-4
A 4573 Alert/Evac/Chime Module Controls
This module generates Alert and Evacuation tones for use in an emergency. Triggering of these tones and the
volume adjustment trimpots are located here. Refer to section 2.1 for more details.
5
Stereo RCA input connectors
Connect these inputs (1-8) to the input audio sources such as a CD player etc. These inputs are converted to
mono internally. Note. Inputs 1 & 2 also have a line level XLR input (Refer to section 7).
6
RCA input sensitivity DIP switches
These DIP switches are used to set the input sensitivity of the 8 auxiliary input sources. Each input can be config
ured for an input sensitivity of 0.3V or 0.7V. See fig 1.5b.
Output levels
Voice Chime Alert
Over
& Evac
24VDC In
(4A M205)
Lift/Chassis
ZONE PLATES OR PRESET PLATE
Keyboard
INPUTS
SW2
SW1
8
7
6
5
4
3
2
1
SW5
ON
OFF
1 Phantom Phantom
Power On Power Off
2
Mic Level Line Level
Switches 3 & 4 Not Used
Vox
Level
Volume
Priority Input
L
R
Vox
Level
Trigger
To Paging Consoles/Preset Plate
3
4
1 2 3 4
ALERT - EVACUATION MODULE
1 2 3 4
L
R
SW3
EV
CO
M
CH1/ C
AN
CH2
AL
2
1
3
1 - Shield
2 - Hot
3 - Cold
1 - Shield
2 - Hot
3 - Cold
2
1
3
SW3 Input 1 & 2 XLR
Phantom Power Settings
SW
ON OFF
(1) Input 1
ON OFF
(2) Input 2 ON OFF
Triggers
OUTPUT
S
8
7
6
5
4
3
2
1
EMERGENCY INPUT
DC Fuse
Earth Lift
+
-
24VDC In
Power Fail
+
_
Manufactured in Australia By
Altronic Distributors Pty. Ltd.
www.redbackaudio.com.au
BCD & DIP SWITCH SETTINGS
DIP SWITCH
CHIME CONTACT
4
5
6
7
CH2
CH1/CANCEL
OFF OFF OFF OFF
Pre Announce
Ding Dong
ON OFF OFF OFF
Pre Announce Repeating Bong
OFF ON OFF OFF
Pre Announce Repeating Bing
OFF OFF ON OFF
Pre Announce
CANCEL
OFF OFF OFF ON
Ding Dong
Pre Announce
ON
ON
ON
ON
Ding Dong
Repeating Bong
OFF ON
ON
ON
Ding Dong
Repeating Bing
ON OFF ON
ON
Ding Dong
CANCEL
ON
ON OFF ON
Repeating Bong Pre Announce
ON
ON
ON OFF Repeating Bong
Ding Dong
OFF OFF ON
ON
Repeating Bong Repeating Bing
OFF ON OFF ON
Repeating Bong
CANCEL
OFF ON
ON OFF
Repeating Bing Pre Announce
ON
ON OFF OFF
Repeating Bing
Ding Dong
ON OFF ON OFF
Repeating Bing Repeating Bong
ON OFF OFF ON
Repeating Bing
CANCEL
The Alert/Evacuation module has multiple chime options, a recordable
voice-over message and adjustable alert to evacuation tone switch-over times.
These options are selectable inside the unit, via the BCD rotary switch and
DIP switches located on the alert/evacuation module (refer to below settings).
ON
OFF
Momentary Alert
& Evac operation
Latched Alert
& Evac operation
1
2
3
4
Voice-over
message ON
Voice-over
message OFF
Not Used
Not Used
Mic recording
enabled
Mic recording
disabled
DIP
SW
1 2 3 4
SW5
1
2
(Maximum 500mA per output)
8
7
6
5
4
3
1
SW4
(Not Used)
16GB
Maximum
Micro SD Card
2
1 2
3
4
1 2
3
4
1 2
3
4
1 2
3
4
1 2
3
4
Aux Input Sensitivity
DIP Switch Settings
SW1
ON OFF
(1) Input 1 0.3V 0.7V
(2) Input 2 0.3V 0.7V
(3) Input 3 0.3V 0.7V
(4) Input 4 0.3V 0.7V
SW2
ON OFF
(1) Input 5 0.3V 0.7V
(2) Input 6 0.3V 0.7V
(3) Input 7 0.3V 0.7V
(4) Input 8 0.3V 0.7V
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
1
5
8
11
6
7
2 3
4
9 10
18
13
14
15
16
17
23
19
21
22
24
25
26
20
12
Aux Input Sensitivity
DIP Switch Settings
SW1
OFF ON
(1) Input 1 0.3V 0.7V
(2) Input 2 0.3V 0.7V
(3) Input 3 0.3V 0.7V
(4) Input 4 0.3V 0.7V
SW2
ON OFF
(1) Input 5 0.3V 0.7V
(2) Input 6 0.3V 0.7V
(3) Input 7 0.3V 0.7V
(4) Input 8 0.3V 0.7V
Fig 1.5b
