Redback A 4500B Operating Manual page 7

Overview
13 Audio Out RCA Connectors
Connect these outputs to the input of the background music amplifier.
14 Bell Contact
These contacts are for remote triggering of the Bell tone. These could be triggered by a remote switch or other
closing contact.
15 Alert Contact
These contacts are for remote triggering of the Alert tone. These could be triggered by a remote switch or other
closing contact.
16 Evac Contact
These contacts are for remote triggering of the Evacuation tone. These could be triggered by a remote switch or
other closing contact.
17 Cancel Contact
These contacts are for remote triggering of the cancel function. These could be triggered by a remote switch or
other closing contact.
18 Mic Volume
Adjust this trimpot to adjust the A 4564 Microphone volume.
19 RJ45 interface
This RJ45 port is for connection to the A 4564 microphone paging console.
20 RJ45 interface
This RJ45 port is for connection to the A 4578, A 4581 and A 4581V wall plates.
21 Dip Switches
These are used to select various options. Refer to DIP Switch Settings section.
22 24V DC Input (Backup)
Connects to a 24V DC backup supply with at least 1 amp current capacity. (Please observe the polarity)
23 24V DC input
Connects to a 24V DC Plugpack with 2.1mm Jack.
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Redback® A 4500B Evacuation Controller & Timer
Redback® Proudly Made In Australia 7