Operation Manual

Installation and Operation Manual S400 series 19
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
Frames used
Priority 1
Priority 2
Priority 3
1
Boat speed
VHW
--
--
2
Speed over ground
VTG
RMC
--
3
Depth
DPT
DBT
--
4
Log
VLW
--
--
5
Water temperature
MTW
--
--
Note: The data from the NMEA input are displayed with the icon.
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
Data transmitted
1
VHW
Boat speed
--
2
VLW
Total log
Trip log
3
MTW
Temperature
--
4
DBT
Depth
--
5
DPT
Depth
--
Note: The NMEA 0183 output does not repeat the frames received on its input.
3.2. Mounting and connections
3. Installation
3 Installation