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Model: NM-251D-ZDA
NMEA Buffer Splitter
with build-in filter RMC -> ZDA
NM-251D-ZDA is a part of the NM-251 Series family and is programmed to function as a GPS signal filter/converter that produces the $GPZDA sentence from any GPS capable of transmitting the $GPRMC string
Certificates
Model: NM-251A
NMEA Buffer Splitter
NM-251A is a two channel input/five channel output NMEA-0183 multiplier with input priority encoding. 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.
Certificates
Picture
NM-251A Buffer - Splitter
Model: NM-251A-MUX
NMEA Buffer Splitter with dual input multiplexer
NM-251A-MUX is a two input channel multiplexer with five output channels NMEA-0183 data multiplier. It enables combining and multiplying of NM-0183 sources to all navigational instruments through five talker ports and PC connection through RS-232.
Certificates
Picture
NM-251A NMEA Buffer & Dual multiplexer
Model: NM-251B
Speed Log Interface
NM-251B is a Speed Log ppm output to NMEA-0183 converter that enables connection of every speed log that uses the “closing” contact interface with digital systems and instruments that comply with the NMEA-0183 standards. The NM-251B is capable of converting the speed log contact closures to a standard NMEA $VWVHW string with checksum error control and output at TTL, RS-422 and RS-232 signal levels.
Certificates
Picture
NM-251B speed Log Interface
Model: NM-251BRC 
NMEA Baud Rate converter 
NM-251BRC is a baud rate converter that allows interconnection of talkers and listeners with different baud rates
NM-251BRC has five general purpose output ports that are able of transmitting NMEA sentences in both RS422 and TTL signal levels, depending on the connection topology and each one can fan out one instrument.
Certificates
Picture
Baud Rate Converter
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