Raymarine Autohelm ST3000, Owner'S Handbook Manual

Page: 44 / 77

Chapter 4: Installing the Wheel Pilot 39
4
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IMPORTANT:
Correct power cable size is critical for correct autopilot
operation. If in doubt, use a heavier gauge cable than specified.
A lighter gauge cable may cause a voltage drop between the
supply and the autopilot. This will reduce the power at the wheel.
SeaTalk cabling
The ST3000 control unit is SeaTalk compatible. It can receive and
transmit information to other instruments and autopilot control units
via the SeaTalk bus.
To connect the ST3000 control unit to the SeaTalk bus you will need
a suitable SeaTalk interface cable (part numbers: D229 flat moulded
plug, D179 male round plug, D181 female round plug) or a plugged
SeaTalk cable with one end cut off:
• plug one end of the cable to the last instrument or control unit
• connect the cores at the other end to the SeaTalk socket as shown
CAUTION:
The fuse on the control unit power supply is too large to offer safe
protection to the SeaTalk bus. You MUST protect the power
supply for the SeaTalk 12 V (red) line with a 5 A fuse (or
equivalent circuit breaker).
D5631-1
Screen
(Sea Talk 0 V) Red
(+12 V)
Yellow
(Sea Talk
Data)
Black
(Supply 0 V)
Pin
Identification
Stripes
Front view
of ST3000
+12 V 0 V
12 A
SeaTalk socket
(viewed from rear)
81194_1.book Page 39 Wednesday, July 25, 2001 12:10 PM