Iq Bus "Drop Out" Relays; Hardware Controls; Iq Address Switch (S1); Reset/Preset Switch - Crown IQ-MC4 Reference Manual

trolled via software or may be pro-
grammed to switch when a fail con-
dition is present on any channel.*
The high-impedance (10 K ohm)
AUX input can sense logic signals
and can be programmed to activate
system mute or report fault condi-
tions when a logic high is present.
(See Section 5.2.2 for more informa-
tion.) All amplifier channel's output
can be monitored as a balanced
line level signal which is sent to pins
1 and 6 of the RJ-11 connector (soft-
ware selectable).
4.1.6 IQ Bus "Drop Out"
Relays
"Drop out" relays are provided on the
IQ Bus ports to maintain the continuity
of the IQ communication loop even if
the IQ-MC module loses power.

4.2 Hardware Controls

The following IQ-MC controls are ac-
cessed via hardware switches located
on the unit.

4.2.1 IQ Address Switch (S1)

An 8-section DIP switch is used to set
the IQ address of the unit. A valid IQ
address is any number from 1 to 250.
Numbers higher than 250 are reserved
for special use.
An address of "0" places the unit in
stand-alone mode. In this mode, the
IQ bus port is disabled and the IQ-
MC module will not function with IQ
software.
* The AUX output uses inverse logic when
it is configured to report a fail condition.
Normally high, it switches low when any
channel fails a test. In this way it can also
indicate a power loss.
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This switch is located on the rear of
the amplifier. Each IQ component on
a IQ Bus is given a unique IQ address
so it can be independently controlled
and monitored. Two or more IQ com-
ponents of the same type should
NEVER have the same address on
the same IQ Bus loop.

4.2.2 Reset/Preset Switch

A recessed reset/preset switch, ac-
cessible from outside the IQ-MC
panel, performs two functions. First, it
enables the IQ-MC module to be re-
stored to factory default settings, and
second, allows the user to recall any
of 10 presets. A straightened paper
clip or similar small object is required
to press the reset switch.
-To select one of the 10 presets,
complete the following steps:
Remove all input signals. With the
power on, briefly press the switch for
less than two seconds to toggle
through the 10 user-defined presets
stored in firmware. Each press will
increment the selected preset by one.
After the switch is released, the DATA
light will flash for a moment, then the
PRESET indicator will blink to indicate
the preset number selected. Restore
input signals.
-To restore the unit to the factory
default settings, complete the fol-
lowing steps:
Remove all input signals. With the
power on, press the switch and hold
for more than 2 seconds, or until the
DATA indicator blinks twice, and all
settings will be reset to factory de-
fault. When the switch is released, the
DATA indicator will flash rapidly for a
moment. Restore input signals.
IQ-MC Modules
Reference Manual