I have a 520c on the bow and a X-27c on dash. The problem I am having is that I bought the ethernet cable to link the two together and can't figure out how to make it work. I have put the updates in both units. Can anybody help?????

I have a simular set up but I run a 37c on the dash. I used the ethernet cable to join the 2 units and run the Nav card in the 37c. The 520c will not read the card from the 37c but if I drop a way point and the 520c is turned on, then the way point will show up there also. The 520 needs to be on to share way points. If there is a way to be able to see the Nav card on the 520 then I'm not sure how to do that. Under map data the chip does not show up so I'm guessing that card sharing can't happen between the 2 units with just the ethernet cable.

Did you also hook the two together with the backbone cable system. I have that exact same setup you are using. Hook it up per instructions in your manual. Including the backbone system and you will love it.

I have the exact same setup.
The LowranceNet is for networking hardware together such as two or more Sonar/GPS units with the same GPS antenna, or adding Radar and engine monitoring functions such as fuel usage so they can be displayed on your screens.
Unfortunately you cannot share Map cards like Navionics between units, nor can you share icons, or trails, you can (as a previous poster pointed out) share waypoints between two or more units.

The Ethernet cable is for sharing sonar transducer information only.
This is used when you have a seperate transducer on each unit but want to display the same picture on both units.

To access this: Turn both units on, press PAGES, select SONAR, press ENTER, press MENU, way at the bottom it should say SONAR SOURCE, scroll down to SONAR SOURCE, press ENTER. You should have 2 choices: LOCAL(which refers to the unit that you are pushing buttons on in my case it was the LMS-520)
or: LCX-27C
highlight whichever transducer you wish to utilize, and press ENTER.

One additional drawback of the Ethernet is, you can't run both transducers at the same time(unless you unplug the Ethernet cable) it's one or the other.

I hope that's not too confusing

So Scott L,

I have a LCX-25 and an LCM-334i that I want to try to link together (they both have the same adaptors). However, the only thing that I want linked together is the sonar since the LCM-334 has a built in antennae. So my question to you is what would I need to link the two together to achieve this? Would it be the LowranceNet cable, Ethernet cable, or both?

Thanks for the help...

BigFishin

I'm not going to be of much help with those two units as I've never run either one. I'm not even sure if they are compatible with the LowranceNet system. LowranceNet is related to what is called a NMEA 2000 backbone, so if your owners manual refers to NMEA 2000 than it probably is compatible to some degree. I would GUESS, and I stress GUESS, that if your units have Ethernet ports on the back of them, that it is possible that they could share sonar data via an Ethernet cable, but I can't say yes for sure. I'm sure someone here knows the answer or you could try Lowrance Tech Support. Sorry, but I went from a Global Map 2400 and x65 to my current x-27 and LMS520. I draw the analogy of Orville and Wilbur Wright going from flying their plane and their next ride being on the space shuttle. They missed a step or two in technology between flights.