Redback A 2078B Operating Manual page 7

Overview
10 PreBell Volume
Adjust this trimpot to adjust the PreBell playback volume.
11 Audio Out RCA Connectors
Connect these outputs to the input of the background music amplifier.
12 Backup Battery Switch
Use this switch to activate the backup batterry. (Note: The backup battery only backs up the current time).
13 Bell Contact
These contacts are for remote triggering of the Bell tone. These could be triggered by a remote switch or other
closing contact.
14 Alert Contact
These contacts are for remote triggering of the Alert tone. These could be triggered by a remote switch or other
closing contact.
15 Evac Contact
These contacts are for remote triggering of the Evacuation tone. These could be triggered by a remote switch or
other closing contact.
16 Cancel Contact
These contacts are for remote triggering of the cancel function. These could be triggered by a remote switch or
other closing contact.
17 Dip Switches
These are used to select various options. Refer to DIP Switch Settings section.
18 DC fuse (1A M205)
This fuse protects the internal power supply. Replace with 1A rated fuse only.
19 24V DC Input (Backup)
Connects to a 24V DC backup supply with at least 1 amp current capacity. (Please observe the polarity)
20 24V DC input
Connects to a 24V DC Plugpack with 2.1mm Jack.
www.altronics.com.au
Redback® A 4500A Evac Controller & Timer
Redback® Proudly Made In Australia 7