Marine Electronics Forum - Furuno NMEA cable splitter

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View Full Version : Furuno NMEA cable splitter

12-31-2004, 08:54 AM
OK, here's the problem. I have a Furuno 1850 flush mounted on the helm. It is interfaced with a Furuno radar which is in the electronics box. I also have an ICOM VHF with DSC in the electronics box. Does Funo make a splitter that I can attach on the radar end so I also have an NMEA output to run into the VHF so I can have the DSC available?

12-31-2004, 09:00 AM
all you need is this cable it has a connector to hook right in your 1850
and a open end to connect your NMEA wires on the bac of your radio


12-31-2004, 09:09 AM
OK JT, where did you come up with that number? I tried searching Furuno's website but without the part number that I wanted I couldn't get anywhere. I was hoping to attack the problem from the radar side so I didn't have to fish another wire through the hard top.

Edit: I ran that on Furuno's site and came up blank. Who's number is that?

12-31-2004, 09:18 AM
3. sice you thinking Radar but did not list which one you find your radar click the assc page then it will show
all the add ons !!!


12-31-2004, 09:29 AM
Ok. Let me try again here. The 1850 already has the NMEA outlet cable hooked up to it and is run to a Furuno 1700 series* radar. I don't have an open port on the chart plotter to plug into. That's why I need to split it somehow. I could use a terminal block if all else fails. I was just hoping maybe Furuno had a premade cable that takes one female and comes out to two males or a male and an bare wire end.

12-31-2004, 09:40 AM
Then go to Radio shack and buy a junction box with a strip split your NMEA connection to both units and be done ... MUCH cheaper

or this cable plugs in your radar if you have the 1715
000-144-418 NMEA Cable, 1 x 7 Pin Connector, 5 Meters


12-31-2004, 08:01 PM
If you are not using the DGPS port, you can also use this port to output NEMA data via the RS-232 pins. If this port is in use then as the others have stated you need to build a splice into your existing cable. Furuno does not make a cable splitter.

The way you do this is:

1 - Purchase a 6 or more conductor screw terminal block which can be purchased at radio shack or and marine supply store.

2 – Mount the terminal in a location central to all the electronics you want to send the 1850 NEMA data to .

3 – Cut the cable that goes from your 1850 NEMA port to your radar in half and expose the wires on each side of the cable. Re-connect each side of the cut cable one to one at the terminal block. See following diagram

Connector------Terminal --- Connector to Radar

1850 pin 1 -----|-O-O-|----- Radar pin 1 + Furuno TDA to ICOM NEMAIN(+)
1850 pin 2 -----|-O-O-|----- Radar pin 2 + Furuno TDB to ICOM NEMAIN(-)
1850 pin 3 -----|-O-O-|----- Radar pin 3
1850 pin 4 -----|-O-O-|----- Radar pin 4
1850 pin 5 -----|-O-O-|----- Radar pin 5
1850 pin 6 -----|-O-O-|----- Radar pin 6

4 – Attach in parallel to the terminal block your ICOM NEMA inputs. The ICOM NEMAIN(+) should go to the Furuno pin 1 (TDA signal) and the ICOM NENAIN(-) should go to FURUNO pin 2 (TDB signal).

5 – Make sure your NEMA data port is outputting the RMC sentence. Your ICOM should display the Lat. Long and Time information.

Email me with any questions.

Happy New Year

12-31-2004, 08:10 PM
Thanks Steve. That's what I was afraid I would have to do. Was just hoping for something a little neater, like a cable. I'll just add this to the to do list for my new toy for the coming week.

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