Raymarine 150/400 manual Isolated control unit, single power supply

Step 9: Integrate the System 33

Single control unit, single power supply

SeaTalk A

Course computer power supply (via breaker/fuse)

ST60 instruments

Control unit SeaTalk bus

Extra connection on larger SeaTalk systems*

D5391-2

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:

•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

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

SeaTalk A	SeaTalk B
Isolated	Second	SeaTalk bus
control unit	control unit

Course computer power supply (via breaker/fuse)

ST60 instruments

Extra connection on larger SeaTalk systems*

D5392-2

*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.

Step 9