[CA] AIS 250 Install

[Chuck - Raymarine - Moderator]

Chris,

The D244 cannot be interfaced to the MFD's NMEA 0183 communications port. The D244 is a SeaTalk networking component and would be used to connect the MFD's SeaTalk communications interface to other devices within the system having a SeaTalk communications interface. The D244 would be one of the SeaTalk networking components used in networking such devices to one another.

Unlike MFD designs which followed, the C-Series Classic MFDs did not feature support for SeaTalkng communications. Accordingly, while it is permissible to interface the engine system to the MFD via the MFD's NMEA 2000 communications interface, it would not be permissible to interface the Evolution autopilot to the MFD in the manner shown. In the case of this vessel, two powered and properly terminated SeaTalkng / NMEA 2000 backbone. One backbone will include the Yamaha engine gateway and the C-Series Classic MFD as spurs. The second backbone will include the autopilot components and the SeaTalk to SeaTalkng Converter. The SeaTalk bus (3-pin network) including the C-Series Classic MFD and GPS sensor will be interface to the SeaTalk (yellow) socket of the SeaTalk To SeaTalkng Converter. Finally, as the SeaTalk communications socket (3-pin) of the C-Series Classic is designed to supply power to a SeaTalk bus, the SeaTalk cable connecting it to the SeaTalk bus must be cut and then its yellow and shield leads spliced back together. The cable's red leads will not be spliced back together and will be insulated to prevent shorting.

I suggest that you examine your system's cabling again. In most systems have a C-Series Classic MFD and a DSC VHF radio, the MFD's NMEA 0183 cable will be interfaced to the VHF radio's NMEA 0183 communication interface to supply it with GPS data and potentially support sending DSC position reports received by the VHF radio to the MFD to permit them to be plotted. Should the MFD's NMEA 0183 cable be interfaced to a 4800 BAUD NMEA 0183 listener and/or talker, then the leads of the 4800 BAUD NMEA 0183 listener and/or talker will instead be interfaced to the 4800 BAUD NMEA 0183 output and input terminals respectively of the AIS250. The MFD NMEA 0183 Cable's leads will be interfaced to the 38400 BAUD color coded terminals of the AIS250.