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MX 420 Installation and Service Manual
GENERAL
All configurations of the MX420 Control and Display Unit (CDU) are splashproof and
can be installed both above and below deck. To ensure that the back of the display unit
remains splashproof, protection covers must be used around the connectors. The
installation should meet the requirements of the helmsman, the crew or other users.
When flush mounted, locate a smooth and flat surface to insure that the gasket makes
full contact with the mounting surface. Ensure that the navigator is mounted in a place
where water flows off easily. Avoid places where water may accumulate for any
period of time.
Electronic Connections
Refer to figures in Section 3 for the drawing of the display console and Section 4 for
interface cables. The MX420/2 has one interface connector at the back, while the
MX420/8 and MX420/AIS models have three. The power and data I/O cable (Cable A)
and antenna cable are standard in the MX420/2 and MX420/8/AIS models. Cables B
and C are only supplied with the MX420/8 and MX420/AIS. All 18-wire I/O cables are
2 meters long and are clearly tagged with the letter designation near the connector
end. Cable A is pre-wired with a female 18-pin connector while cables B and C are
pre-wired with male 18-pin connectors. These data cables are not interchangeable.
When ordering these cables, please specify the part number and description as
described in the list of components in Section 1 of this manual.
Wire Preparation Procedure
Cables A, B & C are all 9-pair shielded cables. We recommend that the main cable
insulation (black plastic) be stripped about 5 inches back to expose the 9 color-coded
leads. Stripping each of these leads will expose the two wires in each pair, as
follows:
RED ---------- Red & Red/White
BROWN ----- Brown & Brown/White
PURPLE ---- Purple & Purple/White
ORANGE --- Orange & Orange/White
YELLOW --- Yellow & Yellow/Black
GREEN ------ Green & Green/White
BLUE -------- Blue & Blue/White
BLACK ------ Black & Black/White
GRAY -------- Gray & Gray/Black
Strip the individual wire insulation about 1/2 inch to make it more convenient to connect
the wires to the terminal strip posts and cut the shield wires short if not used. Use
electrical tape or shrink tubing to protect exposed shield wires. Use a 20-position
terminal strips to terminate each cable. This item is not supplied with the product, we
suggest getting it from a local electronic store. For more wiring details, please refer to
pages 33, 34 and 35 of this installation manual.
External Power
The MX420 was designed to operate on 12 ~ 32 VDC supply. It can tolerate voltages
no lower than 10 volts and no higher than 35 volts. It draws about 1 Ampere at 12 VDC
(with a MX421/B antenna connected). Power input connection is done through Cable
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 ...