NMEA Multiplexer

The NDC-3 is no longer in production. Please see the current NDC-4 model.





IP66/IP68 Case and Grommet Design

A very robust polycarbonate case with a high waterproof certification. The small case size is ideal for space restrictive applications.

High Quality Angled Screw Terminals
The 'moving cage' type terminals make cable installation a simple and quick operation.
4 OPTO-Isolated NMEA 0183 Data Inputs
Receive the data from up to four NMEA devices. Galvanic Opto-isolation blocks any interfering noise signals / spikes - 'cleaning up' the signal and preventing ground loops.
NMEA PC (USB/RS232) Data Input
Enables PC software (e.g. chart plotter) to add NMEA sentences to the combined NMEA data output. Perfect for PC chart plotter controlled course steering via the NMEA network.
NMEA 0183 and PC (USB/RS232) Outputs
Allows any NMEA device and PC to read the combined NMEA data output. Furthermore, special NMEA codes are used to label each NMEA sentence - allowing the NMEA device or PC to determine where all the NMEA information originated from.
Very Low Current Consumption
Ideal for small vessels with small batteries.

Powerful Processor 

A high-speed microcontroller capable of 10 million instructions per second, and a large NMEA data buffer, allowing smoothing of short-term peaks in the NMEA data flow.

Intelligent Software

Combines the valid data from all active inputs, using a simple priority system. Highest priority input (1) has the best chance of its data being added to the output combined NMEA data, and input 4 the lowest chance. This advanced user controlled system only operates as and when it becomes necessary to reduce the NMEA data outputted (triggered by very high loading of the combined NMEA output).

The RS232 and / or USB output will always contain all of the NMEA data (due to its higher Baud rate and bandwidth).

Flash Upgradeable
The hardware's firmware (software) can be easily upgraded as and when necessary.
Diagnostic Tri-Colour LED
Indicates current operation mode, volume of data being multiplexed, or if a hardware fault has been detected.

Latest News