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Old 02-07-2019, 14:30   #1
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Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

My old Nav398 Raymarine GPS is Nmea 0183 compliant.

My new Standard Horizon 1300 eclipse VHF radio with DSC is Nmea 0183 compliant.

I want too connect my VHF radio to my GPS to get Digital Selective Calling.

Appears I need to connect only 2 wires from radio to GPS. Both manuals call for a yellow and green wire for data input to data output plus and minus.

My issue: Is that I cannot find a Nmea 0183 T connector with 6 pins.
I can only find a Nmea 2000 T Connector with 5 pins like the picture attached.


If I can find a Nmea 0183 T connector this would be a easy install. Both my Radio and GPS is side by side on the console on my sailboat helm.

Can anybody tell me where to find a Nmea 0183 T Connector? Please!
Attached Files
File Type: pdf Nmea 2000 T connector 2.pdf (419.8 KB, 37 views)
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Old 02-07-2019, 14:53   #2
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

Iíve never heard of such a thing.

I use these for my nema 0183 connections.


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Old 02-07-2019, 14:56   #3
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

what Sailmonket does is the only way. NMEA 0183 is messy, you have to neect wires from a sender to a receiver. No connectors.
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Old 02-07-2019, 15:07   #4
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

NMEA 0183 T connector - no such thing.


You just have to splice the GPS data out to the GPS in of your new radio, using their supplied 6-wire pigtail.
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Old 02-07-2019, 15:19   #5
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

Was anybody able to open my attachment. It shows a Nmea 2000 T connector. Hard to believe I can't find a Nmea 0183 T connector. I'm trying not to splice wires here. For $20 for nmea 0183 T connector would be a easy install.
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Old 02-07-2019, 15:21   #6
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

Then why do they got a Nmea 2000 T connector with 5 pins and not a Nmea 0183 T connector with 6 pins. Hard to believe.
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Old 02-07-2019, 15:22   #7
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

Quote:
Originally Posted by friscoron View Post
Was anybody able to open my attachment. It shows a Nmea 2000 T connector. Hard to believe I can't find a Nmea 0183 T connector. I'm trying not to splice wires here. For $20 for nmea 0183 T connector would be a easy install.


Did you read the posts?

There is no such thing as a nema 0183 T connector.

Nema 0183 is a standardized data protocol without any standard connectors. Every 0183 installation Iíve ever done is Unterminated wires that ive put ring terminals onto and attached to each other (talkers and listeners) on a terminal block. This gets messy with multiple talkers and listeners when jumpers are added.
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Old 02-07-2019, 15:32   #8
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

Ok Sailmonkey, I get it. They don't make Nmea 0183 T connectors. But only make Nmea 2000 T connectors. Which I think suck. Since a lot boats out there still using Nmea 0183. I just hate to splice those thin wires, 22 gauge or less from my GPS sensor cable. for connection to my VFH radio.

Thanks
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Old 02-07-2019, 15:46   #9
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Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

Quote:
Originally Posted by friscoron View Post
Ok Sailmonkey, I get it. They don't make Nmea 0183 T connectors. But only make Nmea 2000 T connectors. Which I think suck. Since a lot boats out there still using Nmea 0183. I just hate to splice those thin wires, 22 gauge or less from my GPS sensor cable. for connection to my VFH radio.

Thanks


Lots of boats are using it, but there never has been a standardized 0183 connector. The standard was never created for it.

On top of that, youíve got naked wires coming from both units, so youíre splicing wires anyway.
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Old 02-07-2019, 16:28   #10
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

Nmea 0183 allows one talker and three listeners whereas nmea 2000 is a bit more complicated and is very similar hardware wise to the old SCSI type of data transmission. This simply means that it needs the connections of devices to be done in a specific way that involves connection of droppers to the backbone which is the reason the tee connector exists. Nmea 0183 has no such requirement and typically requires 2 wires for connection of a listener to a talker. In this case, using a pair of gel filled butt splice connectors (that each accept 3 wires) is the best, IMHO, solution.
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Old 02-07-2019, 16:35   #11
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

NMEA is a series protocol !
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Old 02-07-2019, 16:53   #12
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

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NMEA is a series protocol !

Yes, but it still requires daisy chaining and termination resistors.
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Old 03-07-2019, 10:18   #13
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

NMEA 2000 is a CAN BUS architecture. That means there is a common backbone and all devices (Talkers & Listeners) connect to it. NMEA 0183 does not use a common backbone, but instead uses a dedicated one-way connection, One talker to One listener. You can get a multiplexor to allow multiple talkers but there is still only One listener.

NMEA 2000 is an upgraded specification that does away with the limitations of NMEA 0183, and is NOT backwards compatible. NMEA 0183 is still used because it is much lower cost to produce than NMEA 2000. (Licence Fees, Membership Fees, Compatibility Certification Fees, Etc.)
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Old 03-07-2019, 10:32   #14
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

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Originally Posted by OS2Dude View Post
NMEA 2000 is a CAN BUS architecture. That means there is a common backbone and all devices (Talkers & Listeners) connect to it. NMEA 0183 does not use a common backbone, but instead uses a dedicated one-way connection, One talker to One listener. You can get a multiplexor to allow multiple talkers but there is still only One listener.

NMEA 2000 is an upgraded specification that does away with the limitations of NMEA 0183, and is NOT backwards compatible. NMEA 0183 is still used because it is much lower cost to produce than NMEA 2000. (Licence Fees, Membership Fees, Compatibility Certification Fees, Etc.)

Just for clarity, 0183 is single Talker, but multiple Listeners. The only limitation on the number of listeners is the ability of the Talker to drive all the Listener loads. Unfortunately there isn't a simple answer "how many" because Talker driver strength varies, as does Listener loading. But in general, three is pretty safe. Above that, you need to do some homework to assess driver strength and receiver loading.
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Old 03-07-2019, 21:43   #15
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Re: Looking for Nmea 0183 T connector for GPS/VFH Radio DSC

This is a not so enlightening discourse on the differences in wiring protocols between NEMA standard connections and Canbus connections. NEMA signals are transmitted over serial connections between talkers and listeners using wires and come in two flavors. Regular and 433 (or is it 422) for longer runs of the wires. The latter is usually used for long runs to the stern for the connections to the tiller pilot for example. The AIS talkers equipment transmits not 4800 baud but 13,500 for reasons that escape me.
NEMA2000 is a more modern bus which is derived from the automotive CANBUS primarily to supply more robust connectors in the marine environment (and so they can charge higher prices to the salty market). The automotive version I suspect would work just as well. These standards are derived from the computer network protocol of TCP/IP which in turn came from the attempt of the Univ of Hawaii to connect all the campuses together without setting poles between the islands and stringing wire. These latter bus systems and like shouting into a hollow pipe and require terminations and the each end of the organ pipe and tee connectors branching to the various devices. They use TCP/IP which is the protocol your PC is using to talk to the net. After research and reading, you understand what I am reporting here then you can move on to playing in the sandbox......Google is your friend.
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