MX510/MX512 Operator & Installation Manual - Simrad Professional ...

MX51x LAN Crossover (Null) Cable Diagram
The interface between the two (or more) units takes place over a high speed (100 Mbps)
data link. The master unit must be connected to the smart GPS antenna unit (MX421,
MX521A, MX525A, or MX575A). The master unit receives the position data then transfer
it to the slave unit(s) at a one second rate (the same as the position calculation). Due to
the high speed data link, there is virtually no visible position delay between the two (or
more) units.
When two (or more) units are first configured as master and slave(s), the master listens
for a configuration polling message from the slave(s). Once the master recognizes
the slave’s polling message, the Common Data Base (see Table below) is downloaded
from the master to the slave(s). This function also takes place each time the units are
powered up.
Data Base
Present Position
Time
Date
Routes
Waypoints
Reset XTE
DGPS Setup
Dual Control Alarms
Man Over Board
Update once per second
Comments
Update once per second. Displayed in the same mode on
both units
Only one unit can make changes at any given time
Leave the screen and reenter it or press the E key to refresh
the screen if viewing the screen at the same time in both
units. Only one unit can make changes at any given time.
Only one unit can make changes at any given time.
Only one unit can make changes at any given time.
Only one unit can make changes at any given time.
Table 5. Master / Slave Common Data Base
The items detailed in Table 6 are independently controlled at the individual MX51x
control heads.
Plotter Setup
GPS Engineering Display
Dual Control Setup
Lighting Setup
DGPS Displays (slave reflects the
conditions in the master
Navigate Displays
Position Displays
Auxiliary Displays
Tide Displays
NMEA Out Print Out 2
Waypoint Sorting
GPS Displays (slave reflects the
conditions in the master
Table 6. Independently Controlled Functions
108 | Installation