Converting Multiple NMEA 0183 Talkers to NMEA 2000
Due to limitations in the RS422 electrical layer used by NMEA 0183, it is not possible to connect the output of more than one Talker to the input of a Listener. To convert data from more than one NMEA 0183 Talker to NMEA 2000 you have three choices:
Combination & Conversion
Use an NMEA 0183 multiplexer like the Actisense PRO-NDC-1E to intelligently combine the output of the multiple Talkers. Then use an NGX-1 to convert the output from the PRO-NDC-1E to NMEA 2000.
Suggested retail price (SRP) for this solution:
1x PRO-NDC-1E = £368.90*
1x NGX-1 = £179.72*
Total = £548.62*
Simply convert
Use a dedicated NGX-1 for each NMEA 0183 Talker.
SRP for this solution:
2x NGX-1 = £359.44*
3x NGX-1 = £539.16*
4x NGX-1 = £718.88*
All-in-one Combination, Conversion & NMEA 2000 Output
Use the PRO-NDC-1E2K to intelligently combine multiple NMEA 0183 Talkers and convert directly to NMEA 2000 in a single device — no additional converter required.
SRP for this solution:
1x PRO-NDC-1E2K = £442.46*
Recommended
The PRO-NDC-1E2K offers the simplest and most cost-effective single-device solution, combining and converting multiple NMEA 0183 sources directly to NMEA 2000 without the need for a separate converter. For installations with four or more Talkers, using individual NGX-1 converters may be considered, though the PRO-NDC-1E2K remains the recommended approach for most applications given its simplicity and reduced potential for data errors.
Note: prices shown above are the Actisense suggested retail price and exclusive of taxes and shipping. The price available from your dealer may differ. Accurate as of 2026.
For more information on NMEA 0183/NMEA 2000 and how it works, please download our free guides here: https://actisense.com/actisense-hub