Raymarine 150/400 Installation Manual page 42

34
Separate course computer and instrument power
Another option is to provide separate power supplies to the course
computer and SeaTalk system so you can have independent, switched
instrument and pilot systems.
On the illustrated example, the behavior of the control unit on
SeaTalk A depends on whether you connect the red SeaTalk wire to
the SeaTalk B terminal:
•
•
Separate course computer and instrument power supplies
Typical larger boat system
The following illustration shows a typical system layout for a
Type 150G or Type 400G course computer on a larger boat. It has:
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•
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Type 150/400 Autopilot System: Installation Guide
if the red wire is not connected, the control unit does not power up
when the course computer power is off
if the red wire is connected, the control unit shows a PILOT OFF or
NO LINK message when the course computer power is off (as it will
still receive power from the SeaTalk B line)
Control unit
*Red wire not connected:
When course computer power supply is off,
control unit does not power up.
Red*
*Red wire connected:
When course computer power supply is off,
Screen Yellow
control unit shows 'PILOT OFF' or 'NO LINK'
message.
separate course computer and SeaTalk power supplies
an isolated control unit on SeaTalk A
a NMEA 1 output so the radar/chartplotters can use the fast
heading output from the course computer to enable MARPA
(see page 37)
Instrument SeaTalk bus
12 V power supply
for Instrument
SeaTalk bus
(via breaker/fuse)
Course computer
power supply
(via breaker/fuse)
ST60
instruments
D5393-2