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Simrad MX500 | 227

Appendix D - Multiple Unit

Control (Via LAN Connection)

Dual Control Conguration:

The Dual Control mode, which is enabled in the CFG Dual

Contrl. screen, allows you to connect one MX500 as a

Master and another MX500 as a Slave unit. This allows a

common data base to be shared between the two CDU

control heads. This configuration also allows you to use

one antenna connected to the Master unit for both CDUs.

The remaining data ports, the MOB/Event input port, and

the alarm output ports are still available on each unit

for individual use on each CDU. The hardware interface

is accomplished by connecting the two units together

via the Local Area Network (LAN) port. You can use an

Ethernet cross-over (null) cable or an Ethernet switch.

MX 500

MASTER UNIT

MX 500

SLAVE UNIT

MX 422 Professional DG PS Navigator MX 422 Professional DG PS Navigator

LAN Type: Host

LAN Type: Client

LAN Number: 1

Ethernet

cross-over cable

Hub/Switch/Router

( C A T 5 )

No Antenna

Connected

The interface between the two units takes place over a

high speed (100 Mbps) data link. The master unit must

be connected to the antenna. The master unit receives

the NMEA signals from an MX antenna and pass it along

to the slave unit at a one second rate. Due to the high

speed data link, there is virtually no visible position delay

between the two units.

When the two units are first configured as master and

slave, the master unit mirrors to the slave, and the

Common Data Base (see Table D-1) is downloaded from

the master to the slave. This function also takes place

each time the units are powered up. If you happen to

have the CFG1 Dual Control screen active, the status bar

will indicate Mirroring during the database update period.

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