Interfacing - Furuno NX-300-D Operator's Manual

Grounding
• The ground wire (local supply) should be 1.25 sq or larger for Navtex Receiver. The ground
wire should be as short as possible.
• The signal ground and frame ground are separated, however the power line is not isolated.
Therefore, if connecting other equipment which has signal ground connected to frame ground,
the earth lamp will light. Especially, for positive ground battery separate the frame ground of
the external equipment from the earth. If not, the equipment may be damaged.
External equipment
The power supply port is commonly used for connection of external equipment such as
navigation equipment or a PC. Refer to the interconnection diagram on page S-1 for connection.

6.4 Interfacing

This equipment can receive navigation data in RS-232C format. For example, it can receive
position data from GPS navigator GP-31/GP-36 for display on its screen. If you want to connect
equipment which outputs data in a format other than RS-232C, a level converter is required for
interface. Consult FURUNO dealer for details.
Input data sentence description
GGA: GPS position fixing condition (time of fix, latitude, longitude, receiving condition, number
of satellites used, DOP)
GLL: Latitude and longitude
RMB: Generic navigational information (cross track error, steering direction, starting waypoint
no., destination waypoint no., latitude and longitude of starting waypoint, latitude and
longitude of destination waypoint, range and bearing to waypoint, range and bearing
from present position to destination waypoint, velocity to destination, arrival alarm)
ZDA: Time and date
6-4