Navico MX420, MX420/2, MX420/8, MX420/BR, MX420/BRIM, MX420/AIS DGPS Service Manual
Specifications and Main Features
Frequently Asked Questions
User Manual
MX420 Navigation System
Installation & Service Manual
MX420 Navigation System
Installation and Service Manual
Models Covered:
MX420/2
MX420/8
MX420/BR
MX420/BRIM
MX420/AIS BASIC (MKD)
MX420/AIS DGPS
Prepared by
MX Marine
A Division of NAVICO, Inc.
23868 Hawthorne Boulevard, Suite 201
Torrance, California 90505-5908
USA
P/N 3508 102 70060
July, 2007
MX Marine
MX Marine reserves the right to make changes to its products and specifications without
notice.
Copyright July, 2007
About This Manual
We at MX Marine have attempted to take care and develop manuals which provide in-depth
information. Obviously, we can’t anticipate every configuration in which you might install the
MX420, but we can help make your work more thorough and enjoyable.
This manual is organized by first describing the list of included items for the particular model
you purchased. The sections that follows detail the technical specifications of the MX420
navigation unit and the MX421 antenna unit. This is followed with the mechanical and electrical
wiring diagrams and installation notes to guide you in the installation of your MX420 system.
Should you require additional technical support, please first contact the dealer where you
purchased your MX420. Since your dealer sells and installs the MX420 and many other types
of equipment, they are often your best resource for technical questions. You can also contact
MX Marine for technical assistance:
International:
We hope you find the manual enjoyable and informative. As always, we welcome your
comments on improving our products or manuals. Thank you.
Product Information
The model and serial number of your instrument are given on the back of the unit. Please enter
the serial number in the space provided below. Always refer to this information when you
contact your dealer.
Model: MX420 Navigation System S/N ___________________
MX Marine (US)
A Division of NAVICO, Inc.
23868 Hawthorne Blvd., Suite 201
Torrance, California 90505
USA
Height:145 mm (5.71in)
Width:271 mm (10.67in)
Depth overall:53 mm (2.52in)
Depth flush mounted:24.5 mm (0.98in) to wall
Depth for cables:100 mm (3 in.)
Weight:1238 g (2.75 lbs.)
Weight gimbal mount:214 g (0.47lbs)
12
Cables
Cable A:2 m (6 ft)
Cable B:2 m (6 ft)
Canle C:2 m (6 ft)
MX421 Antenna:
Height:89 mm (3.27 in)
Diameter:182 mm (7.28in)
Cable Length:
Supplied:15 m. (Standard length)
Options:20 or 40 meters
MX420 Installation and Service ManualTechnical Specifications
13
MX420 Installation and Service Manual
Environmental
MX420 CDU:
Operating Temperature:-15 to +55 °C. IEC 60, clause 4.5.2 and
4.5.4 (draft 3 rd edition)
Storage Temperature:-30 to +70 °C. IEC 945, clause 4.5.2 and
Operating Temperature:-25 to +70 °C.
Humidity:MIL- STD- 810E, Method 507.3, Procedure
Technical Specifications
50081- 1/ 1992, EN 50082- 1/ 1992 and
55022/ 1994 class B, IEC 801- 2/ 1991, IEC
801-3/ Draft Second Edition, IEC 801- 4/
1998, IEC 945/ 1994, IEC 80/
106/ CDV/ 1995 (Draft IEC945), FTZ 171 R
32/ Aug. 1985, FTZ 171 R 45/ Jan. 1989,
FTZ 171 R 46/ Dec 1988
I. 100% R. H. for 30 days at 24 °C
Power:
MX420 CDU :
Type:DC/ DC switch mode with galvanic separation
Consumption:Less than 11W (display back light on). Typi
Supply voltage:12 or 24 volt battery: 9.6 volt dc to 32 VDC
Reverse protection: -100 volt: internal diode
Over voltage protection:+40 volt: fuse and transient voltage sup
Fuse:Internal over current / over temperature
Insulation:Supply voltage to data pins or shield: Maxi
Antenna supply:12 VDC, maximum 500mA
cal 8W at 24 volt external supply voltage.
Typical 8.7W at 12 volt external supply volt
age
pression
fuse. Automatic resetting
mum 50 VDC
14
Antenna:
MK 421:12 VDC, 200 mA
MK 421B:12 VDC, 280 mA
MX420 CDU Inputs and Outputs:
The input and output circuits of the serial interfaces meet the requirements of:
• IEC 61162-1 including the requirements of ITU-T V.11.
• NMEA 0183 version 1.5, 2.0, 2.1, 2.2 & 2.3
NMEA talker (all outputs):
Levels:Maximum ±6 volt, minimum ±2 volt, A out
Current:Minimum 15mA
Protection: -1 volt to +6 volt, output relative to shield,
NMEA listeners (all inputs):
Insulation:Opto coupler. Maximum ±50 volt, input
Impedance:Minimum 500 Ohms, A- in relative to B- in
Threshold:Maximum 2 volt and 2 mA
Protection: ±15 volt, A- in relative to B- in, ±50 volt,
MX420 Installation and Service ManualTechnical Specifications
relative to B out
±50 volt, output relative to external power
lines
relative to shield or power supply lines
input relative to shield or
power
15
MX420 Installation and Service Manual
MOB/ Event input
Insulation:Maximum ±50 volt, input relative to power
Impedance:3.5 kOhm input relative to Reference GND
Pull-up:15 kOhm to internal 12 volt
Threshold:Positive going maximum 2.3 volt, input
Protection:±25 volt, input relative to shield
Frequency:Triggered with 50 mS bounce control
Pulse width:Minimum 100 mS
Cable B Pins:Pin 6 (normally open) to Pin 1 (GND)
Alarm output
Signal levels:When not in Alarm state, or after
Cable A Pins:Pin 18 (N.O. contact to GND)
Antenna voltage output (Cable A)
DC voltage:12 VDC, +1.0 VDC loaded; (11.5 VDC
DC current:Maximum 500 mA at 12.0 volt DC
Technical Specifications
supply lines
relative to Reference GND Negative going
minimum 0.6 volt, input relative to
Reference GND Hysteresis minimum 0.6
volt
±50 volt, input relative to external
power lines
acknowledged alarm: Normally Open
When in Alarm On state: Closed to Ref.
GND
nominal unloaded)
1 PPS Output (optional)
Output :1 PPS + 50 ns RMS
Signal levels:0-12 Volt
Pulse width:250 mS.
Rise Time:25 nS.
16
MX420 Installation and Service Manual
SECTION 3
MECHANICAL AND INSTALLATION DRAWINGS
17
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