Autonnic A5022 Manuale d'uso - Pagina 6

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Note that the GND wire is used for the current return path. This might be shared with

the NMEA- wire in some installations.

2.2 Compass to a PC serial port

In many cases the wires can be joined directly as shown in Fig 2. Alternatively use the

Autonnic A3036 serial interface unit.

1 +8-30V

A5022

3.1

The serial output format is: 4800 Baud, 8 data bits, 1 stop bit, no parity.

The compass sends information using the standard NMEA-0183 sentence 'HDG':

Magnetic Heading, Deviation, and Variation. But note that the information of Deviation

and Variation is not sent and so blank fields are defined by consecutive commas. In the

A5022 the sentence may have one of several forms typically of the general form:

$HCHDG,hhh.h etc

Where hhh.h is the magnetic heading from 000.0 to 359.9 degrees

Also the Rate-of-turn data is sent either with or without the heading sentence.

For a complete list of output formats available see Section 5

3.2 Furuno AD-10

The compass has a separate, dedicated output in Furuno AD-10 format. This is a

proprietary 4 character serial format, which gives heading in degrees and tens of

minutes. The string 0872 represents the heading 87° 20' so that the precision is to

POWER

SOURCE

7 GND

5 GND

3 NMEA IN -

4 NMEA IN +

6 NMEA OUT +

Fig 3

6 of 12

COM PORT D

CONNECTOR