NMEA 0183 to 2000 Conversion & Axiom

[Chuck - Raymarine - Moderator]

Jon,

Q1. My Q1 was ambiguous, my apologies. My intent is to take the NMEA 0183 muxed output and port it to the NMEA 2000 bus via the NGW-1. This is in preparation for some future upgrades (AXIOM sonar is one such upgrade). I will disconnect the NMEA 0183 input to the E120 so there is only one source of data and it is the NMEA 2000 bus.

Regarding the heading sensor, I have configured the MUX to block the heading input from the autopilot so there is only one heading message on the NMEA 0183 bus. The weather station is from Maretron and does not have a GPS.

A1. Shifting this input from the E-Series Classic MFD #1's NMEA 0183 port to the SeaTalkng backbone may indeed then permit the E-Series Classic MFDs to receive this data via the SeaTalkng/NMEA 2000 backbone.

Q2. Also, I just noticed the AIS-650 has a SeaTalk NG connection so I am planning to get the correct cable to connect it to the NMEA 2000 bus and disconnect the NMEA 0183 interface to Display #2.

A2. Only the Data Master MFD's SeaTalk and SeaTalkng ports will support communications (i.e. these ports of these system's other E-Series Classic MFDs will automatically be disabled). Should the Data Master MFD (i.e. E-Series Classic MFD #1) remain connected to the SeaTalkng / NMEA 2000 backbone, then it will receive supported data from the backbone. That said, the A/C/E-Series Classic MFDs are exclusively designed to process AIS data from an AIS receiver / transceiver which has been interfaced to the NMEA 0183 communications interface of one of the system's MFDs.

Q3. In addition, I was wrong about the GPS data. the GPS receiver is the Raystar and interfaces directly to the E120 master via a separate connection. I have also made a parallel connection to the AIS-650 but not sure that is necessary.
A3. Care should be taken to ensure that the 38400 BAUD NMEA 0183 output of the AIS650 has not been paralleled, as it may drop the signal level below that which interfaced devices may receive data from the AIS650. The 38400 BAUD NMEA 0183 output of the AIS650 may be interfaced to any of the system's MFDs.