Cruisers Forum

Join CruisersForum Today

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 20-05-2014, 06:02   #1
Registered User

Join Date: Feb 2006
Location: Tampa Florida
Posts: 505
What good is a "Multiplexer" ??

I bought a used 42 sailboat that has a "multiplexer" installed Boat also has Raymarine 6001 Autopilot , AIS, Raymarine Wind, Raymarine depth, and a Furuno GPS..... The multiplexer has mass of tangled tiny wires -would like to junk it and connect everything via Raymarine "Seatalk" at the Autopilots Computer Thanks.

georgetheleo is offline   Reply With Quote
Old 20-05-2014, 06:20   #2
Registered User
Capt.Alex's Avatar

Join Date: Jan 2013
Location: St. George's, Grenada
Boat: Nordhavn 50
Posts: 315
Re: What good is a "Multiplexer" ??

I have a similar setup. All of my Raymarine gear uses the seatalk high speed bus, but I also have all of nmea wires going to a multiplexer. The multiplexer allows me to connect my laptop and use the data in OpenCPn or another Nav software application. I can access the position data, AIS, and wind speed/direction on my PC.

Capt.Alex is offline   Reply With Quote
Old 20-05-2014, 06:31   #3
Registered User
wingless's Avatar

Join Date: Aug 2013
Boat: 2000 Searay 380 Sundancer
Posts: 795
Re: What good is a "Multiplexer" ??

The NEMA 0183 data bus is used for a single talker / multiple listener network.

A NEMA 0183 multiplexer permits multiple talkers AND multiple listeners on the network.

This is an older network and new devices use NEMA 2000 instead.
2000 SeaRay 380 Sundancer Mercruiser
454 MAG MPI Horizon 380hp / Westerbeke 7.0KW BCGB
many cool mods
wingless is offline   Reply With Quote
Old 20-05-2014, 09:58   #4
Moderator Emeritus
nigel1's Avatar

Cruisers Forum Supporter

Join Date: Oct 2009
Location: Manchester, UK
Boat: Beneteau 473
Posts: 5,469
Re: What good is a "Multiplexer" ??

Might be there for the AIS, which uses a baud rate of 38,400. C
What chart plotter do you have, and what AIS.
Beneteau 473
Manchester, UK
nigel1 is offline   Reply With Quote
Old 20-05-2014, 15:20   #5
Registered User
Auspicious's Avatar

Join Date: Jun 2003
Location: Chesapeake Bay
Boat: HR 40
Posts: 2,647
Send a message via Skype™ to Auspicious
Re: What good is a "Multiplexer" ??

There are a number of things that happen in various multiplexors. They can do protocol changes and speed changes. Not all do everything.

There are a lot of flavors of Seatalk: 1, hs, 2, and ng. There are speeds and flavors of NMEA protocols: NMEA 0183 at 4800 bps and 38400 bps and NMEA 2000. There are a few other protocols floating around out there (Robertson and Simrad are a couple).

Depending on what kind of hardware you have you may need some conversion somewhere. Although Raymarine pushes SeaTalk most of their chartplotters and autopilots also have ports for NMEA 0183 as well.

It's a real pain but you can get everything to talk to everything. The multiplexor you have may be a necessity or an installation shortcut.
S/V Auspicious
Beware cut and paste sailors
Auspicious is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
"recent price reduction""owner anxious""bring all offers" sailorboy1 Dollars & Cents 15 06-11-2019 05:06
Soft Multiplexer for Linux marinux OpenCPN 38 17-07-2017 10:41
Brookhouse Multiplexer Greggegner Our Community 0 20-12-2011 20:19
Nema Multiplexer Needed or Not ? Jimbo2010 Marine Electronics 15 08-12-2010 20:21
For Sale: NMEA-0183 Raymarine Multiplexer new $60 Ram Classifieds Archive 0 16-12-2009 09:59

Advertise Here

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:09.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.