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Model: NM-DS1
Isolated input 16ch discrete
to NMEA
16 ch isolated input discrete controller to NMEA
The NM-DIS belongs to discrete series to NMEA-0183 converter. It enables connection between systems that output their status using dry contact (e.g. output relays) and AC or DC signal interfaces
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Model: NM-AD10 
NMEA to Furuno AD-10 protocol
The NM-AD10PC is an NMEA-0183 to Furuno AD-10 protocol converter.
The NM-AD10PC can be used to interface any gyrocompass or heading sensor device capable of producing NMEA-0183 sentences with all the Furuno instruments that require AD-10 signals as input to acquire the heading information. 
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NM-AD10 NMEA to Furuno AD10 protocol
Model: NM-422ETH
NMEA to Ethernet
The NM-422ETH is a two channel NMEA-0183 input and four 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 talker ports and direct PC connection through RS-232. In addition the Ethernet interface enables connection of the NM-422ETH in a local TCP/IP network topology. 
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NM-422ETH NMEA converter to TCP/IP - UDP
Model: NM-541 MUX-ETH
5-channel NMEA multiplexer with Serial, USB, RS-422 & Ethernet  
NM-541MUX-ETH is a four or five input channel multiplexer with five output channels NMEA-0183 data multiplier. It enables combining and multiplying of all NM-0183 sources to the navigational instruments through five talker ports and PC connection through RS-232, USB and an optional Ethernet interface.
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Model: NM-541 MUX 
5-channel NMEA multiplexer with Serial, USB, RS-422 & Ethernet  
NM-541MUX is a four or five input channel multiplexer with five output channels NMEA-0183 data multiplier. It enables combining and multiplying of all NM-0183 sources to the navigational instruments through five talker ports and PC connection through RS-232, USB and an optional Ethernet interface.
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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
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Baud Rate Converter
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
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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
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NM-251B speed Log Interface
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
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NM-251A Buffer - Splitter