User Manual

QK-A034 Manual
V 2.0 7 of 16 2020
2.3. SeaTalk
1
Input
The built-in SeaTalk
1
to NMEA converter translates SeaTalk data into NMEA sentences. The SeaTalk
port has 3-Pin terminals for connection to the SeaTalk bus. Ensure the connection is correct before
powering up. Inaccurate connection could damage the A034 and other devices on the SeaTalk Bus.
The SeaTalk converter converts the SeaTalk messages in the conversion table below. When a SeaTalk
message is received, A034 checks if the message is supported. When the message is recognized as
being supported, the message is extracted, stored and converted to an NMEA sentence. Any
unsupported datagrams are ignored. These converted NMEA messages are filtered and then combined
with NMEA data received on the other inputs.
This function allows the NMEA multiplexer to listen on the SeaTalk bus. Only one SeaTalk input is
needed as the SeaTalk bus is a single-cable system that connects all instruments. The A034 SeaTalk
to NMEA converter works in one direction only. NMEA sentences are not converted to SeaTalk.
Supported SeaTalk
1
Datagrams
SeaTalk
NMEA
Description
00
DBT
Depth below transducer
10
MWV
Wind angle, (10 and 11 combined)
11
MWV
Wind speed, (10 and 11 combined)
20
VHW
Speed through water, includes heading when
present
21
VLW
Trip mileage (21 and 22 combined)
22
VLW
Total mileage (21 and 22 combined)
23
MTW
Water temperature
25
VLW
Total and Trip mileage
26
VHW
Speed through water, includes heading when present
27
MTW
Water temperature
50
---
GPS latitude, value stored
51
---
GPS longitude, value stored
52
---
GPS speed over ground, value stored
53
RMC
Course over ground. RMC sentence is generated from stored
values from other GPS related datagrams.
54
---
GPS time, value stored
56
---
GPS date, value stored
58
---
GPS lat/long, values stored
89
HDG
Magnetic heading, including variation (99)
99
---
Magnetic variation, value stored
AS the table shows, not all datagrams result in an NMEA 0183 sentence. Some datagrams are only
used to retrieve data, which is combined with other datagrams to create one NMEA 0183 sentence.