www.altronics.com.au
Redback® Proudly Made In Australia
5
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 “first 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
configured 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 configurations 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”
configuration RJ45 data cabling. When installing ensure all connections
are verified before switching any system component on.
Failure to follow the correct wiring configuration may result in damage to
system components.
For the correct wiring configuration, see section 6.0 “Troubleshooting”.
