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| Multiplex or Autoswitch up to 5 NMEA devices
to your PC, Chart-plotter, Radar, Autopilot and more, with NMEA 0183 HS compatibility
and ISO-Drive ... |
This Actisense™ NMEA Multiplexer
/ Combiner allows connection of up to five NMEA (National Marine Electronics
Association) inputs, and multiplexes / combines or autoswitches them to its
two fully isolated NMEA outputs.
This approach offers these major advantages:
- Completely removes the need for isolated power supplies - as the NDC-4
creates a full 2500v isolation barrier between it's
inputs and each of it's ISO-Drive outputs
- Enables the vessel owner complete access to all NMEA data sources,
instead of the standard one device
- Any problematic or unwanted NMEA sentences can be filtered
out / blocked, to help intelligently reduce the NMEA data to a manageable
amount and prevent data loops
- 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
The NDC-4 has two ISO-Drive outputs which are fully compatible with all standards:
NMEA 0183 (RS422), RS485 and PC RS232 ports.
The NDC-4-USB model has an additional USB
bi-directional port that allows a copy of the data on the second ISO-Drive
output to be sent to a virtual serial port on a PC, while also receiving
data (waypoint data for example) from the PC through the same virtual port.
This option disables the opto input reserved for the PC connection, reducing
the number of inputs the NDC-4-USB has to 4.
New feature: The autoswitching feature of the NSW-1 has
now been added to the NDC-4, making it the single most feature rich Multiplexer
available in the marine market. The NDC-4 can either operate in 'Combine
mode' as before, or the new 'Autoswitch mode' to behave like the original
Actisense NSW-1 Autoswitch
product.
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-4 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.
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