INTRODUCTION
	The NM-251 Series is a family of Data Converters that can be used for data distribution and conversion at marine and industrial applications. Due to the fact that NM-251 Series is a microcontroller based design, it can function in various ways depending on the uploaded firmware. NM-251 Series Converter can be programmed to carry out the following functions:
	Operation
	Two channel input/five channel output NMEA-0183 multiplier with input priority encoding NM-251A is a two channel NMEA-0183 input / four or five channels NMEA-0183 output multiplier . It enables data distribution from two NM-0183 sources (primary and secondary with priority encoding) to all NMEA-0183 instruments through four or five talker ports and PC connection through the RS-232 port. Data from PC’s charting system can be delivered back to the autopilot system from the same RS-232 port which acts bidirectional (talker and listener).
	Downloads
	- NM-251A Installation & Operation manual - ABS Certificate of Design Assessment  - ABS Certificate - IEC60945 Certificate of Conformity - Approval by Hellenic Ministry of Mercantile Marine

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