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NDC-5 Configuration Guide
Basic Routing
Basic routing functions on the NDC-5 are designed to give the user control over which Outputs
receive sentences from the Inputs. The purpose of routing is to essentially dismiss messages that
are not required for certain devices. This is better explained in the example below, where the fol
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lowing has been configured:
IN 1 GPS data goes to Serial, OUT 1 and OUT 2
IN 2 GPS is being blocked to every output in this example
IN 3 AIS goes to Serial and OUT 2
IN 4 USG-2 goes to OUT 1
Note that the friendly names are used here to provide easy identification of the device on each
input. This is extremely useful for an installer who may be visiting the vessel for the first time, as
it saves a large amount of time which would otherwise be spent tracing wires back to understand
what device is connected to each I/O Port.
Advanced Routing
Basic routing here gives a good amount of control over the Inputs and Outputs, however some
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times it is required to go further into the connections and define what messages specifically from
each Input device are sent to each Output. This is where advanced routing comes in.
For example, if the GPS on IN 1 is sending 10 messages, but only 3 of these are required for the
NGW-1 then the advanced routing can be used to filter out unnecessary sentences.
Advanced routing is an extremely powerful tool which can be used to reduce the amount of ‘traf
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fic’ from messages going to a certain Listener, which can be especially useful if the device con
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nected to the output has a lower baud rate (lower bandwidth).
Once the NMEA 0183 talker (GPS) is sending data to the NDC-5, the ‘Capture Live Sentences’
option in the Advanced Routing page can be used to automatically populate the table with every
sentence currently available. These sentences must be ticked to ‘Enable Rule’, which will begin to
further populate the table with ‘Block’ and ‘Pass’ options for each output.
From here, all sentences which are not required for the specified Outputs must be blocked, and
the ones required for each listener set to ‘pass’. See diagram below:
