Redback A 4480B User manual

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Redback® A 4480B 8 In to 8 Out Audio Switcher
Operating Manual
A 4480B 8 Input / 8 Output Audio Switcher
A 4481 Paging Console
A 4476 Preset Selector Wallplate
A 4931, A 4931V, A 4932 Local Input Wallplate or Box
A 4493 Music Source Selector Wallplate
Redback® Proudly Made In Australia
Distributed by Altronic Distributors Pty. Ltd.
Phone: [phone] Fax: [phone] Internet: www.altronics.com.au
IMPORTANT NOTE:
Please read these instructions carefully from front to back prior to installation. They include
important setup instructions.
Failure to follow these instructions may prevent the system from working as designed.
A 4481 A 4493
A 4476 A 4931
User manual revision number: 1.0 09/04/2020

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Redback® A 4480B 8 In to 8 Out Audio Switcher
REDBACK is a registered trademark of Altronic Distributors Pty Ltd
Since 1976 Redback ampliers have been manufactured in Perth, Western Australia by Altronics. With over 40 years
experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build
quality with local product support. We believe there is signicant added value for customers when purchasing an
Australian made Redback amplier or PA product
Australian Made Status
All Redback house products made by Altronics will now be sporting the ofcial Australian Made logo. Since starting manu-
facturing of commercial audio equipment in the mid 70’s we have always taken pride in producing a quality local product.
The new adoption of the Australian Made logo will help us get the word out to local and export markets that our
products carry the ofcial compliance seal of the Australian Made campaign. We have always pushed our ‘local is better’
line in all of our marketing efforts, it’s always an added boost when you are backed up by a widely recognised and
respected icon.
Industry leading 10 year warranty.
There’s a reason we have the industry leading DECADE warranty. It’s because of a long tried and tested history of
bulletproof reliability. We’ve heard PA contractors tell us they still see the original Redford amplier still in service in schools
- that’s over 40 years of operation - and still going strong!
Published by Altronic Distributors
© 2020 Altronic Distributors

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Redback® A 4480B 8 In to 8 Out Audio Switcher
1.0 Overview
1.1 Introduction 5
1.2 Features 6
1.3 What’s in the box 6
1.4 Front panel guide 7
1.5 Rear panel connections 8
2.0 Setup Guide
2.1 A 4573 Alert/Evac Module 11
2.2 Connecting audio sources 13
2.3 Connecting outputs 13
2.4 Connecting power 14
2.5 Conguring the inputs to outputs/zones 14
2.5.1 Routing audio to a zone 15
2.6 Adjusting the bass, treble and input volumes 16
2.7 Adjusting the paging console and emergency input volumes 16
2.8 Adjusting the zone volumes 16
3.0 Local Audio & Paging Console Options
3.1 Local audio conguration 16
3.2 Paging console conguration 17
3.3 Conguring the paging console lockout on the LCD 17
3.4 Conguring the program isolate on the LCD 17
4.0 Emergency Overrides & Priorities
4.1 Priorities 20
4.2 Priority input 20
4.3 Labelling of input sources, zones & presets 21
4.3.1 How to label input sources & zones with USB keyboard 21
4.4 Presets 22
4.4.1 User dened presets (1 to 4) 22
4.4.2 Default preset 22
4.4.3 Last setting preset 22
4.4.4 Setting up the presets 22
4.4.5 Modifying presets 22
4.5 Button lockout feature 22
4.6 Master reset function 22
Contents

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Redback® A 4480B 8 In to 8 Out Audio Switcher Contents
5.0 Peripheral Connections
5.1 Paging console overview (A 4481) 23
5.1.1 Features 24
5.1.2 DIP switch settings 24
5.1.3 Connecting the paging consoles 24
5.1.4 Cascading the paging consoles 25
5.1.5 Cascading the paging consoles with 8 zone wallplates and a preset plate 26
5.1.6 Multi-zone paging 26
5.1.7 Zone lockout 26
5.1.8 Store & recall 27
5.1.9 Emergency override 27
5.1.10 Paging console busy 27
5.2 Music source selection wallplate overview (A 4493) 28
5.2.1 Features 28
5.2.2 Menu accessed features 28
5.2.3 DIP Switch settings 29
5.2.4 Screen Layout Guide 29
5.2.5 Navigating The Menu 30
5.3 Local microphone/line input wallplate (A 4931)
5.3.1 Features 31
5.3.2 Connections 31
5.3.1 Connecting the A 4931 local input wall plates to the A 4493 Zone wall plates. 31
5.4 Preset selector wallplate (A 4476)
5.4.1 Features 32
5.4.2 DIP switch settings 32
6.0 Troubleshooting
6.1 Symptoms & remedies 33
6.1.1 Installation of replacement microprocessor card 33
6.1.2 RJ45 cabling conguration for system components 33
7.0 Help
7.1 Help screens 34
7.1.1 Main screen help 34
7.1.2 Preset help 34
7.1.3 PA On/Off help 34
8.0 Specications
8.1 Specications 35
9.0 Programming Sheets
9.1 A 4480B programming sheet 36
9.2 A 4481 programming sheet 38
10.0 Firmware Updates 40

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Redback® A 4480B 8 In to 8 Out Audio Switcher
Overview
1.0 OVERVIEW
1.1 INTRODUCTION
Designed to meet the demands of todays complex installations, this unit is a very versatile cost effective public address/
background music control system.
In total there are 16 inputs:
• 1 emergency paging input
• 1 alert/evac input
• 6 auxiliary inputs and 2 auxiliary/line inputs
• 2 zone paging inputs
• 1 priority input
• 8 local inputs
Operation is as follows:
Emergency Paging mutes all other inputs, including alert/evac signals and transmits to all zones. Note: the emergency
paging input will accept either a low level balanced mic signal (3mV) or a high level balanced signal (700mV). This enables
sources other than a microphone to be used. For example, the output of a building occupancy warning system could feed
into this input and transmit either verbal messages from the microphone or the alert & evacuation tones. All on an “all
call” basis.
Alert/Evac signals mutes all other inputs, except emergency paging and transmits to all zones.
Zone Paging (via optional A 4481 paging station) mutes auxiliary signals and transmits to selected zones. Zone paging
may be prohibited for each zone from the front panel on the mic console.
Priority Input mutes auxiliary signals and transmits to selected zones. This input has the same priority as the A 4481
paging stations and works on a “rst in best dressed” basis. This input is enabled via a trigger input or vox enabled dual
RCA input.
Local Inputs (1-8 via optional A 4931 wall plate) mutes any auxiliary source selected to that zone. Local inputs can be
congured for either balanced mic or line operation.
Aux inputs (1-8) can be switched to any zone or combination of zones.
Each of the eight auxiliary inputs have tamper proof volume, treble and bass controls, plus a signal presence indicator.
Volume controls are provided for each zone output.
A programmable LCD indicates which input is selected to which outputs.
Tamper proof volume controls and signal presence indicators are provided for local microphone paging and emergency
microphone paging.
Remote selection wallplate (A 4493) may be connected via Cat5e cable to each zone. This wallplate enables selection of
any auxiliary input source, volume adjustment of that zone plus the option to connect a local input source (mic or line) via
the optional A 4931 wallplate.
Memory presets are programmable to provide easy recall of certain system congurations including a default setting, last
memory setting and 4 memory presets. This is selected from the front panel, or remotely via the optional A 4476 preset
selector wallplate (see 5.4, page 28).
System lockout feature to prevent unauthorised adjustment of system settings.
WARNING
System components are connected using standard “pin to pin”
conguration RJ45 data cabling. When installing ensure all connections
are veried before switching any system component on.
Failure to follow the correct wiring conguration may result in damage to
system components.
For the correct wiring conguration, see section 6.0 “Troubleshooting”.

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Redback® A 4480B 8 In to 8 Out Audio Switcher Overview
1.2 FEATURES
• 8 Stereo RCA line inputs (internally mono mixed).
• 2 Microphone XLR inputs with phantom power option.
• Adjustable line input sensitivity 0.3/0.7V.
• Individual bass, treble and volume controls of all line inputs.
• 8 Balanced 3 pin XLR line outputs.
• Individual volume controls of all 8 outputs.
• Alert/evacuation/pre chime tone generator included (alert/evac tones comply to AS1670.4) .
• Emergency balanced input with selectable phantom power and input sensitivity.
• Programmable labelling of input sources and output zones via USB keyboard.
• Programme isolate function.
• Four programmable presets.
• Tampering lockout feature.
• Power fail trigger.
• 240V AC or 24V DC operation.
• 19” Rack Mount (2 unit).
Optional Features
• Zone and emergency over-ride paging via A 4481 paging console.
• Remote zone control of volume and music sources via A 4493 wall plate.
• Preset selection via A 4476 preset wall plate.
• Local microphone or music input connection via A 4931 and A 4493 wall plates.
Priority Order
Priority 1 is the highest priority and overrides all others priorities. Priority 2 is next, then priority 3 and so on.
• Priority 1 - Emergency microphone.
• Priority 2 - A 4481 paging consoles 1 & 2 (if tted, in emergency paging mode).
• Priority 3 - Alert/evacuation tones.
• Priority 4 - A 4481 paging console (in normal mode).
• Priority 5 - Local zone input, if being used.
• Priority 6 - Line inputs.
1.3 WHAT’S IN THE BOX
A 4480B Audio Switcher
M 8973 24V 5A Power Supply
240V AC power lead (suits Australian Standard)
USB - PS2 compatible keyboard (Altronics D 2111)
Acrylic anti tamper cover

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Redback® A 4480B 8 In to 8 Out Audio Switcher
1.4 FRONT PANEL GUIDE
Fig 1.4A shows the layout of the A 4480B front panel.
Fig 1.4A
1 Emergency microphone volume control
Use this control to adjust the volume of the emergency microphone input.
2 Emergency microphone signal present indicator
This LED illuminates to indicate a signal is present at the emergency microphone input.
3 Paging microphone signal present indicator
This LED illuminates to indicate a signal is present at the paging microphone input.
4 Paging microphone volume control
Use this control to adjust the volume of the paging microphone input.
5 Inputs 1-8 signal present indicators
These LEDs illuminate to indicate a signal is present at the corresponding RCA inputs.
6 Inputs 1-8 bass and treble controls
Use these controls to adjust the bass and treble of the 8 input sources as desired.
7 Zone volume controls
Use these to adjust the volumes of the zones.
8 Zone selection buttons
These buttons select the output zone.
9 Preset selector button
This button is used to select pre-programmed preset congurations. (See section 4.4 Presets).
Public address on/off button
This button is used to switch on or off the general paging to a particular zone. (See section 3.3 for more
information). This does not block emergency paging.
Program isolate button
This button is used to isolate inputs from a particular zone. (see section 3.4 for more information)
Help button
Pressing this button provides help on the selected option. (See section 7.0 Help).
Conrm button
This button is used to conrm your selected changes. Push “conrm” and “cancel” buttons at the same time
to lock and unlock the front panel controls.
Cancel button
This button is used to exit from the current menu or cancel the selected option. Push “conrm” and
“cancel” buttons at the same time to lock and unlock the front panel controls.
Overview
Zone 1 Zone 3 Zone 5 Zone 7
Zone 2 Zone 4 Zone 6 Zone 8
Keyboard
USB
Power
Signal
Emergency
Input
- +
Signal
Paging
Console
Signal Signal Signal Signal Signal Signal Signal Signal
Vol 1 Vol 2 Vol 3 Vol 4 Vol 5 Vol 6 Vol 7 Vol 8
Treble Treble Treble Treble Treble Treble Treble Treble
Bass Bass Bass Bass Bass Bass Bass Bass
Input 1 Input 2 Input 3 Input 4 Input 5 Input 6 Input 7 Input 8 A 4480B
8 X 8 Audio Switcher
One
Two
Three
Four
Five
Six
Seven
Eight
Presets
PA on/o
Isolate
Help
Conrm
Cancel
- +
6
0
2
4
8
10
6
0
2
4
8
10
6
0
2
4
8
10
6
0
2
4
8
10
6
0
2
4
8
10
6
0
2
4
8
10
6
0
2
4
8
10
6
0
2
4
8
10
21 43 5 8 9 10
11
12
13
6 7

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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 cong
ured for an input sensitivity of 0.3V or 0.7V. See g 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 O
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
COM
CH1/
CAN
CH2
AL
21
3
1 - Shield
2 - Hot
3 - Cold
1 - Shield
2 - Hot
3 - Cold
21
3
SW3 Input 1 & 2 XLR
Phantom Power Settings
SW ON OFF
(1) Input 1 ON OFF
(2) Input 2 ON OFF
Triggers
OUTPUTS
8 7 6 5 43 2 1
EMERGENCY INPUT
DC Fuse
Earth Lift
+
-
24VDC In Power Fail
+_
Manufactured in Australia By
Altronic Distributors Pty. Ltd.
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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 RepeatingBong
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 NotUsed
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 41 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
21
3
2 1
3
2 1
3
21
3
21
3
21
3
21
3
21
3
21
3
21
3
158 11
6
7
2 3 4 9 10
18 1314151617
23 19 2122242526
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

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Redback® A 4480B 8 In to 8 Out Audio Switcher
7 XLR line inputs
inputs 1 & 2 female XLR inputs.
8 XLR input phantom power settings
Phantom power can be applied to the XLR inputs via DIP switch 3. Refer to Fig 1.5c.
9 Optional Dip Switch Settings
Currently not used
10 Emergency input settings DIP switches
Change the sensitivity of the 3 pin emergency XLR from balanced mic level to balanced line level. Also selectes
phantom power to this input. See g 1.5d.
11 Male XLR balanced line output connectors
Connect these outputs (1-8) to the zone ampliers. Use a 3 pin female XLR connector (pin 1 GND, pin 2 Cold,
pin 3 Hot).
12 Emergency microphone female 3 pin XLR socket
Use this input for emergency or “all call” paging. This has overall priority and goes to all zones. This input is
suitable for connection to the output of a building EWIS system allowing remote paging and alert/evac tones to
be transmitted on an “all call” basis. Sensitivity can be set to mic (0.3V) or line level (0.7V) using the DIP
switch. See SW5 in g1.5d for details.
13 RJ45 connectors for preset plate or paging consoles
These RJ45 ports connect to the A 4481 zone paging consoles or A 4476 preset plate.
NOTE: A maximum of eight A 4481 mic consoles and a single A 4476 preset plate may be used at the same time.
In this case only seven A 4475 zone wallplates can be used. The A 4476 will operate in any “Zone wall plate” or
“Paging console” RJ45 port.
14 Emergency input Vox Level
Use this trimpot adjustment to change the vox level for the emergency mic input.
15 Priority input Volume
Use this trimpot adjustment to change the output level of the priority input.
16 Pririty input trigger
Use this contact to trigger the priority input.
17 Priority Input RCA Connectors
Connect this input to an input audio source such as telephone paging, or special event player such as the playing
of the “ODE”. This inputs is converted to mono internally.
18 Priority Input Vox Level
Use this trimpot adjustment to change the vox level for the priority input.
19 RJ45 connectors for zone wall plates
These RJ45 ports connect to the A 4475 remote zone wallplates, if used.
Overview
1 2 3 4
Input 1 & 2 XLR
SW3
SW ON OFF
Phantom Power
(1) Input 1 ON OFF
(2) Input 2 ON OFF
(3) Not Used
(4) Not Used
Dip Switch 3 Settings
ON
1 2 3 4
Fig 1.5c
1 2 3 4 SW5 ON OFF
1 Phantom Phantom
Power On Power O
2 Mic Level Line Level
Switches 3 & 4 Not Used
SW5
ON
1 2 3 4
Fig 1.5d

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Redback® A 4480B 8 In to 8 Out Audio Switcher Overview
20 USB keyboard connector
Connects to a standard USB keyboard for programming the front panel LCD.
21 Micro SD Card Socket
This socket is used to update rmware (Micro SD card not supplied).
22 Power Fail connector
A closing contact which can be used to trigger a buzzer or lamp via an external relay for indication of a power fail.
23 DC fuse (4A M205)
This fuse protects the internal power supply. Replace with 4A rated fuse only.
24 Pluggable 24VDC backup power socket
Connects to 24V DC power source via Euroblock screw terminals. Observe correct polarity when connecting.
25 24VDC power socket
Connects to 24V DC plugpack supplied with 2.1mm adaptor.
26 Earth Lift switch
This switch is used to isolate the input earth from the chassis to help eliminate earth loops or hum.
2.0 SETUP GUIDE
This is intended to be a quick setup for a minimal install. Section 3.0 will build on the initial setup and cover the installa-
tion of peripheral connections and more in depth detail on programming the unit. In this basic conguration we will use
a setup in a bar as an example. The install requires 2 audio sources, a tuner and a dvd player. This audio will be fed to 4
different zones, the main bar, the beer garden, the restaurant, and the kitchen. All adjustments will be made from the
front panel of the A 4480B.
A programming template in PDF format is available to download from the Altronics website. This allows you to map your
inputs, outputs, zone names, source names and presets before you commence programming. A printed copy is located at
the end of operating manual (see section 9.0).
2.1 ALERT/EVACUATION/CHIME MODULE
The A 4573 module generates pre announcement chimes and alert and evacuation tones.
Separate volume controls are included for adjustment of the alert/evac tone level, the chime level and the message
voice-over level. The chime and alert/evac tones are triggered by closing contacts via a ve way euro block. These triggers
can be set to momentary or alternate action by on board DIP switches.
Chimes included on the module include pre announcement, Ding Dong, repeating Bing and repeating Bong. All of these
are DIP switch selectable.
The module is also tted with a switch over option which changes the evacuation tone from the Alert tone to the
Evacuation tone after a set time. This can be adjusted from 30 seconds to 270 seconds in 30 second increments or it can
be switched off altogether.
A microphone has been included which is used to record an emergency voice over message if required. This message can
be turned on via DIP switches, and will play twice after the evacuation tone has repeated four times.
Fig 2.1a
AL CH2 CH1/
CAN
GND
EV