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MX 420 Installation and Service Manual
To enable the functionality of the Dual Control Integrity Monitor, you
must set the following to:
Dual Control:
Yes
GPS Source:
Automatic
If you want the alarm to sound when the GPS source is switched:
Set the Integrity Alarm to Yes
MX420/AIS Installation
There are two variation of the MX420/AIS models, namely:
•
MX420/AIS Basic System (MKD)
•
MX420/AIS DGPS Navigation System
The MX420/AIS Basic or MKD system is primarily a control and display unit (CDU)
for the MX423 AIS transponder. GPS Position data is supplied by the GPS engine
in the transponder. The MX420/AIS Basic does not perform navigation calcula-
tions. Displays functions like the NAV, TIDE and GPS are inactive. In addition,
some display pages like POS3, AUX3, and AUX5 are also inactive when no
MX421 (smart GPS antenna) is connected to the CDU. A third party external GPS
source may be used to provide position data to the transponder.
The MX420/AIS Navigation system performs both the CDU functions to the AIS
transponder and navigation functions just like any regular GPS navigator. The
MX420/AIS Basic and the MX420/AIS Navigation Systems are essentially identi-
cal control and display unit. The main difference is the addition of the MX421
smart antenna and the activation of the AIS option (AIS license is required). The
MX420/AIS detects the presence of the MX421 antenna and makes the full
navigation function available to the user. Refer to pages 39 and 41 for AIS wiring
diagram.
Other MX420/AIS Interface
In addition to Speed and Gyro (ROT) interface, it is suggested to connect the
MX420/AIS CDU to the following equipment:
•
MX423 AIS Transponder - NMEA 5 (required)
•
Long-Range Communication (INMARSAT-C) - NMEA 6 (optional)
•
ECDIS Chart - NMEA 7 (optional)
These equipment requires high-speed connection to the MX420. NMEA 5 through
10 are high-speed ports capable of handling baud rate speeds up to 115.2 Kbps.
We recommend interfacing these equipment to the NMEA ports listed above for
better results.
Summary of Contents for MX420
Page 1: ...Installation Service Manual MX420 Navigation System ...
Page 5: ......
Page 8: ...1 MX 420 Installation and Service Manual List of Components SECTION 1 LIST OF COMPONENTS ...
Page 9: ...MX 420 Installation and Service Manual List of Components 2 ...
Page 15: ...MX 420 Installation and Service Manual List of Components 8 ...
Page 17: ...MX420 Installation and Service Manual Technical Specifications 10 ...
Page 24: ...17 MX420 Installation and Service Manual SECTION 3 MECHANICALAND INSTALLATION DRAWINGS ...
Page 25: ...18 MX420 Installation and Service Manual ...
Page 32: ...25 MX420 Installation and Service Manual SECTION 4 ELECTRICALINSTALLATION DRAWINGS ...
Page 33: ...26 MX420 Installation and Service Manual ...
Page 49: ...42 MX420 Installation and Service Manual ...
Page 57: ...50 MX 420 Installation and Service Manual SECTION 5 INSTALLATION NOTES ...
