NM-251A

The NM-251A is a robust NMEA0183® data multiplier, buffer, and splitter, specifically designed for systems requiring reliable signal distribution and source management. Featuring two optically isolated inputs to five buffered outputs (four RS422/TTL and one RS232), it efficiently multiplies data from one or two NMEA0183® sources, with an integrated priority encoding function (fallback mode) to ensure continuous data flow from the most significant input. The unit includes two optically isolated inputs as well as a bidirectional RS232 port that acts as both a talker and listener, allowing data exchange with a PC charting system or other listeners. It is an ideal, high-quality solution for safely distributing navigational data from one or two sources to multiple listeners on a vessel, ensuring data integrity and providing failsafe functionality across complex serial communication setups