Raymarine 150/400 Installation Manual page 41

Step 9: Integrate the System
Single control unit, single power supply
Isolated control unit, single power supply
If you have two control units, we recommend that you connect one to
each SeaTalk terminal. In the following illustration:
•
•
If the SeaTalk B line fails, the isolated control unit will switch to
Standby mode as a safety measure. By pressing auto on the isolated
control unit you can regain full autopilot control.
Isolated control unit, single power supply
* Note: Depending on the number of SeaTalk units and the total length of SeaTalk
cabling, you may need to provide power supply to each end of the SeaTalk bus
('ring-main' style). Refer to the instrument handbook for more information.
Control unit
Extra connection on larger SeaTalk systems*
the course computer provides power to the SeaTalk system
one control unit is connected on its own to SeaTalk A so it is
isolated against any possible failure of SeaTalk B
Isolated
control unit control unit
SeaTalk bus
Second
SeaTalk bus
Extra connection on larger SeaTalk systems*
33
Course computer
power supply
(via breaker/fuse)
ST60
instruments
D5391-2
Course computer
power supply
(via breaker/fuse)
ST60
instruments
D5392-2