Instructions

ASC-1 / ASC-2
MXLV Amplifier Supervisory Cards
ENGINEER AND ARCHITECT SPECIFICATIONS
l Amplifier Input And Output Supervision
l Variable Backup Amplifier Ratio
l Automatic Transfer To Backup
Amplifier
l Plugs Into OMM-1 Cardcage
l Listed, ULC Listed, CSFM,
NYMEA, City Of Chicago
Description
ASC-1
The ASC-1 is an MXLV card which plugs into one slot of
the OMM-1 cardcage. It supervises the output of up to
three primary and optionally, one backup amplifier. The
amplifiers may be on the same or different audio chan-
nels.
One ASC-1 is required for each 3 primary amplifiers,
even if no backup amplifiers are being used.
The ASC-1 monitors and compares the channel riser
output on the OMM-1 to the amplifier output. If it deter-
mines that the output of any primary amplifier is incor-
rect, it will automatically transfer operation to the backup
amplifier. The backup amplifier may be shared by
multiple ASC-1 cards providing the ability to determine
the primary to backup ratio. If desired, backup amplifi-
cation can be provided on a one for one basis, using
one ASC-1 for each primary/backup amplifier set.
Each ASC-1 occupies one OCC-1 sub-address. The
address is set using an on-board DIP switch. A second
DIP switch is provided for configuration of the ASC-1.
Connections between the amplifiers, audio riser busses
and the ASC-1 are made through the appropriate OMM-
1 screw terminals.
This equipment is approved for operation over the
temperature range of 0°C to 49°C.
ASC-2
The ASC-2 is an MXLV card which plugs into one slot of
the OMM-1 cardcage. It supervises the output of one
primary and optionally, one backup amplifier.
One ASC-2 is required for each primary amplifier,
whenever a high power audio riser is to be connected to
ICP Control modules, even if no backup amplifiers are
being used.
The ASC-2 monitors and compares the channel riser
output on the OMM-1 to the amplifier output. If it deter-
mines that the output of any primary amplifier is incor-
rect, it will automatically transfer operation to the
backup amplifier. The backup amplifier may be shared
by multiple ASC-2 cards providing the ability to deter-
mine the primary to backup ratio. If desired, backup
amplification can be provided on a one for one basis,
using one ASC-2 for each primary/backup amplifier set.
Each ASC-2 occupies one OCC-1 sub-address. The
address is set using an on-board DIP switch. A second
DIP switch is provided for audio configuration of the
ASC-2.
Connections between the amplifiers, audio riser busses
and the ASC-2 are made through the appropriate OMM-
1 screw terminals.
This equipment is approved for operation over the
temperature range of 0°C to 49°C.
5020
CATALOG NUMBER
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