2. WIRING
2-2
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 cm30 cm earthing plate to the outside of the ship’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.
Connector Color Remarks
1 DC-P-IN(+) RED Power input, 12-24 VDC
2 DC-M-IN(-) BLK
3 TD1-A GRN/BLK(1) IEC61162-2/NMEA1
4 TD1-B GRN/RED(1)
5 RD1-H GRY/BLK(1)
6 RD1-C GRY/RED(1)
7 TD2-A GRN/BLK(2) IEC61162-2/NMEA2
8 TD2-B GRN/RED(2)
9 RD2-H GRY/BLK(2)
10 RD2-C GRY/RED(2)
11 RD3-H GRY/BLK(3) IEC61162-2/NMEA3
12 RD3-C GRY/RED(3)
13 12V-P(+) BRN Power output, 12-24 VDC
14 12V-M(-) ORG
15 EXT-BUZZ-EN WHT External buzzer
16 SHIELD BLK Drain wire, to ship’s switchboard’s
ground terminal
Do not fail to ground the display unit.
If the ground is poor or there is no ground, inter-
ference to the radar and other equipment can
result.
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