Mackie RCF RX 3000 Instructions D'emploi page 75

The A.C.U.s are divided into groups (max. 64 groups including NORMAL and BACKUP units). Any number of NORMAL or BACKUP A.C.U.s
can belong to a group, but the total number of units present in the system must not be more than 120. A NORMAL unit can be substituted
with a BACKUP unit only when these units belong to the same group. Using a special menu on the control unit, it is possible to activate
or disactivate the A.C.U.s manually, in order to use or not use the amplifier controlled by these units for sound amplification in a specific zo-
ne (see the section USING THE "INSERT BACKUP ACU" MENU). When an A.C.U. is disactivated, the amplifier being controlled by it is ex-
cluded from operating in a specific zone and a backup amplifier of the group can be inserted in its place, or a "BACKUP A.C.U. in the
event that the backup amplifier is controlled by an RB 3300 back-amplifier board.
NOTE
• The NORMAL units are normally ACTIVATED, while BACKUP units are always normally DISACTIVATED.
The activation/disactivation of an A.C.U. (NORMAL or BACKUP) in the event of an alarm caused by a breakdown or malfunction of an
amplifier, can be carried out in MANUAL or AUTO mode.
The operation of the NORMAL and BACKUP units in the two modes is described below.
• MANUAL mode on NORMAL unit – In the event of an alarm on the amplifier being controlled, the disactivation of the NORMAL unit
• AUTO mode on NORMAL unit –
• MANUAL mode on BACK UP unit – In the event of an alarm of the NORMAL unit belonging to the same group, the activation of the
• AUTO mode on BACKUP unit –
When a group of A.C.U.s includes more than one BACKUP unit configured with the AUTO activation/disactivation mode, the order of inter-
vention of these units in the event of an alarm on a NORMAL unit of the same group configured with the AUTO activation/disactivation mo-
de, depends on the IDENTIFICATION NUMBER assigned to it: the first BACKUP unit to be activated is the one with the lowest identification
number; the second BACKUP unit to be activated is the one with the subsequent identification number; and so on for any other BACKUP
units.
NOTES
• The activation of an A.C.U. (NORMAL or BACKUP) that has been automatically disactivated due to an alarm caused by a fault or malfunc-
tion on the amplifier being controlled, must always be carried out manually using the dedicated menu on the CP 3100 control unit.
• When a NORMAL unit is disactivated and the group of A.C.U.s to which it belongs includes a backup amplifier that is not controlled by an
RB 3300 back-amplifier board (no Backup A.C.U.), the backup amplifier is always activated automatically in place of the primary
amplifier.
• When a group of A.C.U.s has more than one BACKUP unit, in the event of an alarm on the NORMAL unit belonging to the same group and
configured with the AUTO activation/disactivation mode, the BACKUP with the lowest identification number of those configured with the
AUTO activation/disactivation mode is activated first; the BACKUP units with the lowest identification number in the absolute sense, but
which have been configured with MANUAL activation/disactivation mode, therefore do not interrupt the automatic substitution of a
NORMAL unit.
The types of alarms that determine automatic disactivation of an A.C.U., and the eventual automatic activation of the backup unit (or of the
backup amplifier if it is not coupled with an RB 3300 board) are:
• PA FAULT. alarm: This alarm can be activated if the A.C.U. that controls the amplifier is equipped with the optional SB 3320 FAULT DE-
TECTOR board. It indicates an alarm situation caused by any breakdown on the amplifier being controlled that causes a perceptible de-
crease in the power transmitted.
• OVL. alarm: This alarm can be activated if the A.C.U. is equipped with an auxiliary alarm contact, which closes when a protection device
intervenes or when the equipment is operating abnormally (e.g. operation in overload).
At the end of an alarm on the A.C.U., to return to the initial status of the NORMAL and BACKUP units (the NORMAL units are normally ac-
tivated and the BACKUP units are normally disactivated), the units must be manually restored to the original condition by means of a dedi-
cated menu on the control unit (see the section USING THE "INSERT BACKUP ACU" MENU), or the system must be reconfigured by means
of the procedures described in the section STORING A CONFIGURATION.
For A.C.U. programming, see the section USING THE "ACU" MENU; for manual activation/disactivation of the A.C.U.s, see the section USING
THE "INSERT BACKUP ACU" MENU. The following examples can provide further clarification on the operation of the A.C.U.s.
must be carried out manually using a dedicated menu on the CP 3100 control unit.
In the event of an alarm on the amplifier being controlled, the disactivation of the NORMAL unit is
carried out by the system automatically.
BACKUP unit must be carried out manually using a dedicated menu on the CP 3100 control unit. In
the event of an alarm on the amplifier being controlled, the disactivation of the BACKUP unit must
be carried out manually by means of a dedicated menu on the CP 3100 control unit.
In the event of an alarm of the NORMAL unit belonging to the same group, the activation of the
BACKUP unit is carried out by the system automatically if the NORMAL unit that substitutes it is
configured with the AUTO mode for activation/disactivation; otherwise, if the NORMAL unit that
substitutes it is configured with MANUAL activation/disactivation mode, the activation of the
BACKUP unit must be carried out manually.
In the event of an alarm on the amplifier being controlled, the disactivation of the BACKUP unit is
carried out by the system automatically.
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