Furuno FR-10, Operator'S Manual

Page: 21 / 171

1. INSTALLATION & WIRING
1-5
Ground
Grounding guidelines :
• The ground wire (local supply) should be 2sq or higher.
• The length of the ground wire should be as short as possible.
• For an FRP vessel, fasten a 20 cm
×
30 cm earthing plate to the outside of the boat’s
hull and attach the ground wire to a bolt on the plate.
• Attach a closed-end lug ( ) to the ground wire. Do not use an open-end lug
( ).
• External equipment whose signal line is connected to ground cannot be directly
connected to this equipment if the positive polarity of the vessel’s DC power is con-
nected to ground.
MJ-A6SPF pin assignments (NMEA0183-1/2)
MJ-A7SPF pin assignments (NMEA0183-3)
Connector Color Remarks
1 TD1/2-A White NMEA0183
2 TD1/2-B Black
3 RD1/2-H Yellow
4 RD1/2-C Green
5 GND
6 GND Drain Wire
Connector Color Remarks
1 TD3-A White NMEA0183
2 TD3-B Black
3 RD3-H Yellow
4 RD3-C Green
5 EXT-BUZZER 12V Red
6 EXT-BUZZER Blue
7 GND Drain Wire
CAUTION
Do not fail to ground the display unit.
If the ground is poor or there is no
ground, the radar and other equipment
may pick up interference.