Installation Instructions

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NMEA 0183 | NSS Installation Manual
NMEA 0183
To exchange NME0183 data, the NSS display has a NMEA 0183 serial port, providing both an
input and an output.
The port uses the NMEA 0183 (serial balanced) and RS232 (single ended) standards, and can
be con gured in the software for di erent baud rates up to 38,400 baud. NMEA 0183 sen-
tences output by the NSS can be individually turned on or o .
Refer to “NMEA 0183 supported sentences” on page 61 for a complete list of sentences.
Wiring NMEA 0183 for serial balanced output
VIDEO IN/
NMEA 0183
A
B
Orange:
RX_B
Green:
RX_A
Blue:
TX_B
Yellow:
4800, 9600, 38400 baud
TX_A
+
+
-
-
NMEA 0183 Talker
NMEA 0183 Listener
RX_B
RX_A
TX_B
TX_A
Wiring NMEA 0183 for single ended output
VIDEO IN/
NMEA 0183
A
B
Orange:
RX_GND
Green:
RX
Blue:
TX_GND
Yellow:
4800, 9600, 38400 baud
TX
+
+
-
-
NMEA0183 Talker
NMEA0183 Listener
RX_GND
RX
TX_GND
TX
 Note: some product literature may use di erent naming for connections. The following cor-
relations can be assumed; (Tx_A = Tx+), (Tx_B = Tx-), (Rx_A = Rx+), (Rx_B = Rx-), (Tx = TxD), (Rx
= RxD).
 Note: when connecting to a DB-9 plug for interfacing to a PC, combine Rx_GND and TX_
GND from the NSS, and connect to pin 5 (PC GND) of the plug. Rx is connected to pin 3, Tx to
pin 2.
Talkers and Listeners
Do not connect multiple devices outputing data (Talkers) on to the input (Rx) of the NSS
display. The RS232/RS422 standards are not intended for this type of connection, and data
will be corrupted if more than one device transmits simultaneously. The output however
may drive multiple receivers (Listeners). The number of receivers is  nite, and depends on the
receiving hardware. Typically three devices is possible.
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