Chapter 3: Installation 31
3.6 Grounding the SPX SmartPilot
CAUTION: SPX systems MUST be connected to ship’s ground. Failure to
connect the unit to ground may cause it, or other on-board electronics to
function incorrectly.
• Use a dedicated earthing plate (e.g. dynaplate) in contact with the water.
• Use flat tinned copper braid, 30 A rating (1/4 inch) or greater. Equivalent stranded
wire diameter 4mm or greater.
• Keep the length of the earth braid as short as possible.
To install ground
• Using the supplied yellow (1/4 inch) female spade connector, connect the earthing
braid to the RF GND terminal on the SPX SmartPilot.
• Connect the other end of the earth strap to a dedicated earthing plate in contact
with the water.
Note:
If it is not possible to connect to a dedicated earthing plate, the earth braid may be con-
nected to the negative pole of the battery (ideally at the battery itself).
3.7 Connecting the data cables
For overview information on SeaTalk and SeaTalk
ng
, and the different types of cabling
and connections used by each, see
Data systems
on
page 5
.
Course computer
GROUND
POWER, 15 AMP
POWER
B
MOTOR
A
D10457-1
OR
Dedicated earthing
plate (preferred)
87072-2.book Page 31 Thursday, November 22, 2007 8:43 AM
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