NDC-1 NMEA Multiplexer
This version of the NDC is no longer in production, please view the NDC-4 product if you require a new Multiplexer.
The Actisense NMEA Multiplexer / Combiner allows connection of up to four NMEA (National Marine Electronics Association) inputs to be multiplexed/combined in to one NMEA output.
The Actisense NMEA Multiplexer / Combiner allows connection of up to four NMEA (National Marine Electronics Association) inputs to be multiplexed/combined in to one NMEA output.

This approach offers these major advantages:

Electrical spike protection is provided as standard on all four input channels using opto-isolators. This protects any connected equipment from most system faults; a particularly valuable benefit as equipment requiring the most data, such as a PC or chart plotter, is often the most expensive to repair or replace.

The NDC-1 Data Combiner contains highly intelligent software that manages the multiplexing and filtering operation, allowing every input to have a chance of its data reaching the combined NMEA output.
Geek Mode
  • It enables the vessel owner complete access to all NMEA data sources, instead of the standard one device
  •   Each NMEA input device is Opto-isolated from all other NMEA device in the system
  • Any NMEA data not required can be easily filtered out to reduce the total amount of NMEA data in the system
  •   Each input and output baud rate can be changed to match the requirements of connected devices

Technical Specification

Supply voltage   8 35 V
Supply current Supply voltage 12v (no load) 110 120 mA
  Supply voltage 24v (no load) 70 75 mA
NMEA in/out        
Input voltage tolerance

Continuous operation

Short Term Operation (<1 sec)

-15

-35

+15

+35

V

V

Differential input voltage Required level for data to be detected 1.8 - V
Input current RS485/RS422 compatible - 32 mA
Input to output protection Full Galvanic Opto-isolation protection - 2000 V
Baud rate Configurable Baud rate 4800 38400 bps
Data propagation delay   1 100 msec
RS232 in/out        
Input voltage tolerance

 

-15 +15 V
Input voltage threshold

Logical LOW

Logical HIGH

0.8

1.7

1.2

2.8

V

V

Output resistance Output voltage swing +/-2V 300 - ohms
Baud rate Configurable Baud rate 4800 115200 bps
Data propagation delay   1 100 msec
General        
Ambient temperature   -20 +70

°C

NDC-1 NMEA Multiplexer
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Testimonial
"Just a quick mail to say well done, the EMU-1 is a great idea and it's easy to use and setup."
Colin Coady, Colin Coady Marine
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