AUSTRALIAN MONITOR AMIS ZRM4 Service Information - Page 6
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CHANNEL INPUTS
Each channel has a dual RCA and XLR
input. The RCAs accept line level signals
and are internally summed to mono.
The XLR accepts balanced mic or line
level signals depending on the internal
gain switch adjustment. The XLR will also
have +15v phantom power if selected
on the internal switch. See page 6 for
more information about the internal
adjustments available.
NOTE: Channel #1 is the priority
input and as such is able to
cause other signals to be ducked
when active. If you have a paging
mic, it should be connected to
channel #1. Channel #1 is not
affected by muting from the
chime module or level control
from the VCAs, so signals that
need to be muted in the event
of an emergency or need to be
controlled by a remote level
control should NOT be connected
to channel #1.
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OUTPUTS
The output XLRs provide balanced line
level signals.
AMIS ZRM4 INSTALLATION & OPERATION MANUAL
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CHIME MODULE CONTROL
CONNECTIONS
These connections are used to trigger
the internal tones. Only one tone can be
triggered at a time. Triggering occurs by
connecting the ALERT, EVAC, BELL or PRE
terminal to COM. The pre-announce and
bell tones are routed along with input
channel #1, whilst the evac and alert tone
are always routed to all outputs.
4
VCA
Each output level may be controlled by
a RC1 remote wall panel or 500k ohm log
(A) pot. This connector provides
connection for these panels. The VCA is
in series and before the master output
level controls, so that setting either VCA
of Master level control to zero will mute
the output.
REAR PANEL
5
POWER 20V AC
This 2.1mm connector accepts 20v AC
from the provided power supply.
Alternatively, the unit may be powered
from a 24-34v regulated DC power supply
or battery.
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EARTH
The earth stud provides a location to
connect a mains earth strap.
A NOTE ABOUT GROUNDING:
It may be necessary in some
circumstances to ground the
AMIS ZRM4 to eliminate noise
in the system. This can be done
using the earth stud or by making
sure that the chassis is
electrically connected to the
equipment rack (which should
be grounded).
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