The Nmea Interface - VDO Logic Log Depth Montageanleitung Und Bedienungsanleitung

The NMEA interface

The NMEA (National Marine Electronics Association) is an organization
of manufacturers, with the objective of developing standards for data
transmission between units of different makes.
The VDO LOGIC DEPTH sends the following data sets corresponding to
the NMEA standard 0183:
- $IIDBT: Depth below sender
- $IIDPT: Depth below sender and sender - water surface distance
The NMEA interface mostly corresponds to the serial interface RS422.
In most cases the NMEA interface can be connected directly to the in-
terface RS232 of the PC. Connect the PC as follows to read NMEA
data:
LOGIC indicating instrument:
Terminal 9 (GND)
Terminal 20 (NMEA A out)
If this connection does not work, the PC has to be equipped with an in-
terface RS422 to RS232. Connect the PC as follows:
LOGIC indicating instrument:
Terminal 19 (NMEA B out)
Terminal 20 (NMEA A out)
The NMEA data sets can be read under Windowws 3.xx with the termi-
nal program (accessories group), or under Windos 95 with the hyperter-
minal.
Use the following settings in the data transfer menu:
Transfer rate
Data bits
Stop bits
Parity
Protocol
86
NMEA- SCHNITTSTELLE
9-pin PC
connector:
pin 5
pin 2
PC interface RS422 to RS232
IN B (Return)
IN A (Signal)
4800 Baud
8
1
none
none
25-pin PC
connector:
pin 7
pin 3