14 | Functional description
MX51x BR Beacon and Remote Configuration
MX51x/BRIM (Backup Receiver Integrity Monitor)
The MX51x/BRIM is an enhanced Dual-Control configuration wherein two MX51x CDUs
and two MX521A smart DGPS antennas are supplied. The two MX51x units are connected
in dual-control configuration but they operate as independent navigator units with
dedicated antennas. The Integrity Monitoring (IM) feature is a software option that
works in the MX51x CDU hardware.
This configuration allows data to be shared between two remotely separated stations
(i.e. navigator’s station and helmsman’s station), with independent access to various
information fields. The purpose of this configuration is to enable each CDU to calculate
its own position, then check the operational status of the other GPS receiver. The GPS
receiver with the best overall operational status provides the system position. This is a
fully redundant system, with self-recovery capabilities. The Integrity Monitor function
can be set to Automatic switch over or forced to the any of the units for position and
navigation functions.
LAN port must be setup before enabling the IM feature. The units can be connected over
an ethernet crossover cable or through a hub/switch/router. See section 4 of this manual
for setup details.
MX51x/BRIM System Configuration
MX51x/MUC (Multi Unit Control)
The MX51x/MUC is a configuration wherein three or more MX51x units are networked
together using a hub or a router switch. In a MUC network one unit is assigned as a
master unit and the rest are either slaves or repeaters. Slave units are able to display
navigation data and control the master unit remotely while the repeaters can only
display navigation data. A maximum of five MX51x units can be a member of the MUC
network, one master unit, one or two slaves and the rest as repeaters. Please refer to
the installation notes section of this manual for the MUC diagram.
1) In general, this manual will refer to all versions of this product line simply as the
MX51x CDU, CDU or navigator. Where distinction between models is necessary, the
particular model type will be indicated.
2) Four MX Smart antenna models are compatible with the MX51x CDU. They are the
MX421-10 (GPS or DGPS), MX525A (DGPS only), MX521A (GPS or DGPS ) and MX575A
DGPS Compass.
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