Quark-Elec Manual
https://www.quark-elec.com
4 of 15
2016
V1.0
1 I
NTRODUCTION
QK-A031 NMEA 0183 multiplexer enables the connection of multiple NMEA 0183 devices and host
devices such as PCs, laptops or tablets. QK-A031 multiplexer has three NMEA 0183 inputs (listener-
ports), one SeaTalk1 input, one NMEA 0813 output (talker-port), a WiFi interface and a USB port to
connect to a host devices. The multiplexer combines NMEA data that is received on the listener ports
and sends this data to a talker port, the WiFi interface and the USB port simultaneously. The USB
port is also used for configuration of specific WiFi and NMEA ports settings.
The built-in SeaTalk1 to NMEA converter translates SeaTalk data into NMEA sentences. This data is
then combined with NMEA data received on the other inputs. This allows a SeaTalk instrument to
communicate on the NMEA network. Only one SeaTalk input is provided since the SeaTalk bus is a
single-cable system that connects all instruments together through one cable. The SeaTalk to NMEA
converter in the QK-A031 works in one direction. NMEA sentences are unable to be converted into
SeaTalk, the multiplexer just listens on the SeaTalk bus.
Data from multiple instruments is available wirelessly though a WiFi connection, giving complete
freedom to navigate, monitor and control from anywhere on board. It acts as a wireless access point
for iPad, iPhone, Android tablets and other WiFi enabled devices.
Every NMEA input on the QK-A031 is galvanically isolated (also called opto-isolation).A galvanically
isolated input prevents unwanted currents flowing between the instruments and the multiplexer.
These currents can damage equipment or interfere with radio signals and should therefore be avoided.
