The gadgetPool NMEA & SeaTalk Multiplexer is a NMEA-Multiplexer with additional Seatalk input and USB-port.
With this NMEA-Multiplexer you can connect serveral NMEA devices, read data from a SeaTalk network and also connect your PC

Multiplexer ports :

• 4 galvanic isolated NMEA 0183 inputs.
• 2 NMEA 0183 outputs
• 1 galvanic isolated SeaTalk input. SeaTalk Data are translated into NMEA sentences
• 1 USB port for PC. With the USB port, a PC can send and receive NMEA Data.

What is a Nmea-Multipelxer good for ?

According to NMEA standards, a sender can send it's data to up to 4 receivers.

For a receiver, It is not possible to receive data from more than one sender.
A NMEA receiver can only receive data from one other device at a time.
I.e. With one NMEA input port, a Chart plotter can not receive position from a GPS device and depth data from a depth sounder at the same time.

In order to be able to receive data from more than one NMEA source, a NMEA-Multiplexer has to be placed in between the senders and the receiver.

A NMEA-Multiplexer receives data on separated input ports from different NMEA devices.
It buffers this incoming data, filters them and sends them out well ordered to the receiver.

gadgetPool NMEA-Multiplexer can receive data from :

• up to 4 NMEA devices ( i.e. GPS, depth sounder, wind instruments, AIS etc.. )
• 1 board PC via USB
• 1 SeaTalk network.

The Multiplexer buffers, filters and send this data in proper order to :

• 1 board PC via USB
• up to 2 different types of NMEA receivers

Housing and terminals

NMEA inputs

NMEA outputs

SeaTalk connection

Currently the following NMEA sentences can be produced based on incoming SeaTalk data:

• $IIDBT Depth
  
• $IIVHW Speed through water
• $IIMTW Water temperature
• $IIVLW Total milage, trip milage
• $IIMWV Wind direction and wind speed
• $IIHDM Heading magnetic
• $IIRMC Speed over ground,heading, longitude, latitude , time, date
  Optional an aditional $IIGLL sentence can be sent.
• $IIRSA Rudder

Power supply

Technical data :

• Operation voltage : 10-30 Volt DC.
• Power consumption : 60 mA ( 100 mA max. at full load)
• Inputs : 4 * NMEA-0183 ( RS-422 ) galvanic isolated
• Outputs : 2 * NMEA-0183 ( RS-422 )
• Network : 1 * SeaTalk input galvanic isolated
• Baudrates : 1200 Baud - 38400 Baud ( USB up to 57600 Baud )
• Memory : 2*4 kB Buffer for each NMEA channel. ( 4kB send/ 4kB receive)
• PC-interface : 1 * USB virtual serial port for NMEA sending and receiving