NDC-3 NMEA MULTIPLEXER

This version of the NDC is no longer in production, please view the NDC-5 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.

Actisense retired product 750x750 1 1

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

The NDC-3 has an NMEA 0183 output and a bi-directional RS232 port.

The NDC-3-USB has an additional USB bi-directional port (which when connected disables the RS232 input, but leaves the RS232 output freely available for use).

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-3 Data Multiplexer contains intelligent software that manages the multiplexing operation, allowing every input to have a chance of its data reaching the combined NMEA output. Tested up to and beyond a combined 400% loading of the four inputs.

  • 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
  • Significant reductions in installation cost (from reduced cable lengths and requiring only one NMEA cable to be routed around the bridge to supply the multiplexed NMEA data
Supply voltage835V
Supply currentSupply voltage 12v (no load)2630mA
 

 

Supply voltage 24v (no load)

 

16

 

18

 

mA

 

NMEA in/out
Input voltage toleranceContinuous operation

Short Term Operation (<1 sec)

-15

-35

+15

+35

V

V

Differential input voltageRequired level for data to be detected1.8V
Output currentRS485/RS422 compatible32mA
Input to output protectionFull Galvanic Opto-isolation protection2000V
Baud rateFixed Baud rate4800bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

RS232 in/out
Input voltage tolerance-15+15V
Input voltage thresholdLogical LOW

Logical HIGH

0.8

1.7

1.2

2.8

V

V

Output resistanceOutput voltage swing +/-2V300ohms
Baud rateConfigurable Baud rate4800115200bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

USB Interface(NDC-3-USB only)
Interface version

 

USB v1.1 (fully compatible with USB v2.0)

 

 

 

 

 

 

 

General
Ambient temperature-20+70°C

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

The NDC-3 has an NMEA 0183 output and a bi-directional RS232 port.

The NDC-3-USB has an additional USB bi-directional port (which when connected disables the RS232 input, but leaves the RS232 output freely available for use).

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-3 Data Multiplexer contains intelligent software that manages the multiplexing operation, allowing every input to have a chance of its data reaching the combined NMEA output. Tested up to and beyond a combined 400% loading of the four inputs.

  • 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
  • Significant reductions in installation cost (from reduced cable lengths and requiring only one NMEA cable to be routed around the bridge to supply the multiplexed NMEA data
Supply voltage835V
Supply currentSupply voltage 12v (no load)2630mA
 

 

Supply voltage 24v (no load)

 

16

 

18

 

mA

 

NMEA in/out
Input voltage toleranceContinuous operation

Short Term Operation (<1 sec)

-15

-35

+15

+35

V

V

Differential input voltageRequired level for data to be detected1.8V
Output currentRS485/RS422 compatible32mA
Input to output protectionFull Galvanic Opto-isolation protection2000V
Baud rateFixed Baud rate4800bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

RS232 in/out
Input voltage tolerance-15+15V
Input voltage thresholdLogical LOW

Logical HIGH

0.8

1.7

1.2

2.8

V

V

Output resistanceOutput voltage swing +/-2V300ohms
Baud rateConfigurable Baud rate4800115200bps
Data propagation delay

 

 

 

1

 

100

 

msec

 

USB Interface(NDC-3-USB only)
Interface version

 

USB v1.1 (fully compatible with USB v2.0)

 

 

 

 

 

 

 

General
Ambient temperature-20+70°C