Raymarine NMEA Multiplexer Especificações descarregar pdf (Página 4)

The picture below shows a typical setup with a multiplexer combining data from a wind instrument,

a compass and a GPS. This data is forwarded to a tablet and an autopilot using two different types

of outputs: an NMEA talker port called ‘Out1’ and a WiFi interface. The multiplexer forwards the

received NMEA sentences to the tablet and the autopilot at the same time.

The WiFi connection to the tablet is actually bi-directional: the tablet acts as a listener and a talker

at the same time. It receives NMEA sentences from the instruments to be processed by navigation

software on the tablet. This software can generate NMEA sentences to control an autopilot. These

sentences are sent to the multiplexer and forwarded to the autopilot. They can be combined with

the sentences received from the other navigation instruments.

The picture also shows a computer in light grey that is connected to the USB port on the

multiplexer. The MiniPlex-2Wi also has a USB port with the same function as the WiFi interface.

This allows you to connect a second (fixed) computer while having the freedom of moving around

with your laptop, PDA, tablet or smartphone having access to the same navigation data as the

fixed computer.

The USB port is also used to update the firmware of the multiplexer and to configure the WiFi

interface. These tasks cannot be performed using the WiFi interface.

The MiniPlex-2Wi

The MiniPlex-2Wi is a multiplexer with four NMEA inputs (listener-ports), two NMEA outputs (talker-

ports), a WiFi interface and a USB port to connect to a computer. The multiplexer combines NMEA

data that is received on the listener ports In1 to In4 and sends this data to talker ports Out1 and

Out2, to the WiFi interface and to the USB port. The WiFi interface and the USB port are also used

to send data from a computer to the multiplexer to be forwarded to Out1, as well as to send

commands to configure the multiplexer.

Every NMEA input on the MiniPlex is galvanically isolated, sometimes called opto-isolation because

of the use of opto-couplers for isolation. An opto-coupler is a small device that transports

information by means of light instead of electricity.

A galvanically isolated input prevents unwanted currents to flow between instruments and the

multiplexer. These currents can damage equipment or interfere with radio signals and should

therefore be avoided. Galvanically isolated inputs are required by the NMEA standard.

The USB port of the MiniPlex is also galvanically isolated, which isolates the computer from the

navigation network and protects it against potential damage caused by ground loops or voltage

spikes.

Both NMEA outputs can drive up to four listeners each. Flexible routing options allow you to specify

which NMEA sentences are sent to these outputs.

Besides the basic functionality of combining NMEA data from multiple sources, the MiniPlex offers a

range of features to manage NMEA data like Sentence Filtering and Routing, Input Priority with

automatic switchover, testing of data integrity, Talker ID modification and SeaTalk

to NMEA

translation.

The MiniPlex can seamlessly be integrated into an existing Raymarine SeaTalk network when

SeaTalk mode is enabled. This mode changes one NMEA listener port into a SeaTalk input. When

connected to a Raymarine SeaTalk network, the multiplexer will translate SeaTalk data into NMEA

sentences and combine these with NMEA sentences that are received on the other listener ports.

Only one SeaTalk input is needed since the SeaTalk bus is a single-cable system that connects all

instruments together through one single cable. SeaTalk to NMEA translation in the MiniPlex works

only one-way. No NMEA sentences are converted into SeaTalk, the multiplexer just listens on the

SeaTalk bus.

Wind

Comp-

pass

GPS Autopilot

Multiplexer

In 1

In 2

In 3

USB

Out 1

Tablet

Wiﬁ

1 2 3 4 5 6 7 8 9 ... 43 44

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