This product is no longer in production. The NDC-4 has been redesigned to combine or autoswitch NMEA 0183 data, making it the direct replacement for the NSW-1.
The Actisense NMEA Autoswitch (NSW-1) from Active Research, allows the data from up to four NMEA (National Marine Electronics Association) input devices to be switched to a single NMEA output, by determining the highest priority device with good data.
Replace your mechanical changeover switch with the NSW-1 automatic changeover system from Actisense. The intelligent Autoswitch (NSW-1) will guarantee that the best input device is always selected to supply the NMEA data output, automatically choosing the next highest if the current highest priority input device should fail for any reason.
The NSW-1 Autoswitch contains intelligent software that determines the highest priority device based on one of three reasons:
- A complete failure to send any NMEA data
- Corrupted NMEA data detected (with checksum calculation)
- If the validity flag(s) contained within the NMEA data indicate that this data is not valid and should only be used with caution
Electrical spike protection is provided as standard on all four input channels using opto-isolators. This protects any connected equipment from most system faults; a particularly valuable benefit as equipment requiring the most data, such as a PC or chart plotter, is often the most expensive to repair or replace.