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Active Research Ltd 2022
NMEA 0183 Talker and Listener Designations
•
The NMEA have updated the NMEA 0183 specifications to ensure a consistent naming conven
-
tion is used for labelling ports. The designation follows the same rules as used for Rx and Tx
labelling but uses the terminology “Talker” and “Listener” instead.
• The
Input / Receiving (Rx) port
will be labelled as a
LISTENER
port.
• The
Output / Transmitting(Tx) port
will be labelled as a
TALKER
port.
NMEA “Talker” Input Connections
The PRO-NDC-1E has 5 input connections, labelled
IN-1 to IN-5.
•
Inputs are labelled ‘A’ and ‘B’ in line with the NMEA
specification for labelling NMEA0183 signal pairs.
• If your “talker” follows the NMEA wire colour con-
vention, the wires should be coloured as follows:
•
TALKER ‘A’/+ : WHITE
•
TALKER ‘B’/-
: BROWN
• If your wire colours do not follow the NMEA
convention, you will need to consult your device
manual and find which wire colours corrrespond
to ‘A’/+ and ‘B’/- and attach accordingly.
•
If your “talker” device has only ‘A’ and ‘GND’ output
wires, connect the ‘GND’ wire to ‘B’/-
‘A’/+
‘B’/-
NMEA “Listener” Output Connections
The PRO-NDC-1E has 2 output connections, labelled
OUT-1 & OUT-2.
•
Outputs are labelled ‘A’ and ‘B’ in line with the
NMEA specification for labelling NMEA0183 sig
-
nal pairs.
• If your “listener” follows the NMEA wire colour
convention, the wires should be coloured as fol
-
lows:
•
LISTENER ‘A’/+ : YELLOW
•
LISTENER ‘B’/- : GREEN
• If your wire colours do not follow the NMEA
convention, you will need to consult your device
manual and find which wire colours correspond to
‘A’/+ and ‘B’/- and attach accordingly.
• The shield from each listener should be connect-
ed to the ‘GND’ connector on the output terminal.
• The RF ground stud should be connected to the
vessels RF ground plate using a minimum con-
ductor size of 8 AWG in accordance with the
NMEA 0400 installation standard. Use a crimped
connector to securely bond the RF wire.
‘B’/- ‘A’/+
