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3 Installation
3.1. NMEA 0183 interfacing
The Multi S400 display has one NMEA 0183 input and one output, non shielded. The
NMEA 0183 frame format recognized by the Multi display complies with the V3.01
standard of January 2002.
3.1.1. NMEA 0183 input interface
The NMEA 0183 input interface can simultaneously acquire the 5 physical
measurements listed in the table below. To avoid confusing the same data from
different frames, a 3-levl priority management algorithm is used to prioritize some
frames over others. Example: if the frames VTG and RMC are received, only the VTG
frame will be decoded to receive the SOG data.
No
NMEA data
1
Boat speed
2
Speed over ground
3
Depth
4
Log
5
Water temperature
Note: The data from the NMEA input are displayed with the
3.1.2. NMEA 0183 output interface
The Multi S400's NMEA output emits at a speed of 1 Hz the 5 frames below:
No
NMEA frames
1
VHW
2
VLW
3
MTW
4
DBT
5
DPT
Note: The NMEA 0183 output does not repeat the frames received on its input.
Priority 1
VHW
VTG
DPT
VLW
MTW
Data transmitted
Boat speed
Total log
Temperature
Depth
Depth
Installation and Operation Manual S400 series
Frames used
Priority 2
Priority 3
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RMC
--
DBT
--
--
--
--
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icon.
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Trip log
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