Redback A 4567C Operating Manual page 6

Redback A 4567C 10 Zone Line Monitor
®
2.2 Configuring the speaker lines for monitoring.
As mentioned in section 2.1 all the speaker lines must be of the 100V type, with all speakers fitted with a 22uF Bipolar
capacitor and all lines terminated with an 100KΩ resistor of at least 0.25W rating. Figures 4a - 4d illustrate the
requirements for the speaker lines.
Figure 4a shows an C 2168C 100mm
ceiling speaker fitted with the latest in
EWIS requirements.
Figure 4b shows the 22uF Bipolar
capacitor visible as the plastic cover has
been removed from the
transformer. The various transformer
power taps are also visible. This model
has wattages ranging from 0.33W
to 5W. If this speaker was wired in
parallel to 99 other speakers, all on the
5W tap, this would give a total of 500
watts for the speaker line which is the
maximum load for a zone on the
A 4567C.
Figure 4c shows the Loop In/ Loop Out
wiring configuration required when
wiring up multiple speakers on a line.
Figure 4d shows the end of line resistor
fitted to the last speaker in the line.
The value must be 100KΩ with a
power rating of at least 0.25 watts.
6 Redback® Proudly Made In Australia
Heatshrunk power
tap lead.
Plastic cover to remove
the possibility of shorts
occuring in the
ceiling space.
Wire protect terminals.
Provides an easy
Loop In/loop Out
termination.
With the cover removed
the 22uF Bipolar
capacitor is visible.
Transformer power
taps. These are
changeable.
Speaker line coming
into speaker
termination. (Loop In)
Speaker line going
out of speaker
termination (Loop Out).
End of Line resistor
100KΩ 0.25W.
Speaker line coming
into speaker
termination. (Loop In)
Fig 4a
Fig 4b
Fig 4c
Fig 4d
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