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Author Topic:   NEMA WIRING

mohamed1953 posted 06-30-2008 05:22 PM ET (US)
I HAVE A UNIDEN VHF RADIO UM525 NEED TO BE CONNECT IT TO FURUNO GPS VUNIT GPF 7000 FOUR WIRES COMING FROM THE FURUNO UNIT yELLOW,GRREN AND WHITE AND BLACK, THE ROADI HAS 4 PAIRS
OF WIRES BROWN, BLEW GREEN AND WHITE. ANY HELP IN WIRING THEM TOGETHER
THANKS
MOE
Chuck Tribolet posted 06-30-2008 10:27 PM ET (US)
You need the manuals for each unit so you know what each
color wire does. There's no standard. Post that info
here for both units, and we'll help you.
And you don't need to shout (ALL CAPS).

Chuck
jimh posted 06-30-2008 11:25 PM ET (US)
NEMA is an acronym for the National Electrical Manufacturers Association. They don't have much to do with marine radios or with interconnecting them to GPS receivers.
You probably are thinking of the NMEA, the National Marine Electronics Association. They developed the serial data protocols for interconnecting marine electronic devices.
In your situation you probably want to connect the GPS receiver NMEA-0183 output to the VHF Marine Band Radio NMEA-0183 input. It is simple. You just identify the wire that is the GPS output and connect it to the radio input wire. Connect the two devices to common 12-volt power. It the radio has a differential input, connect the inverting input to battery negative.
jimh posted 06-30-2008 11:28 PM ET (US)
I see you are an engineer, so you'll be familiar with technical literature. The radio instruction manuals have all the details you will need. They clearly identify which signals are carried on what conductors.
Once you get the wiring correct, it is just a matter of configuring the software. See what NMEA sentence your radio likes, and have the GPS send it. Again, the instruction manual has all the details.
David1877 posted 07-01-2008 01:14 AM ET (US)
This is all too familiar.
I completed this task about a month ago. The thread might be helpful. I connected my Lowrance GPS to my Standard Horizon radio.
It was a snap.
If you have trouble, Jim was a great resource in my case.
Good luck.

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Author	Topic: NEMA WIRING
mohamed1953	posted 06-30-2008 05:22 PM ET (US) I HAVE A UNIDEN VHF RADIO UM525 NEED TO BE CONNECT IT TO FURUNO GPS VUNIT GPF 7000 FOUR WIRES COMING FROM THE FURUNO UNIT yELLOW,GRREN AND WHITE AND BLACK, THE ROADI HAS 4 PAIRS OF WIRES BROWN, BLEW GREEN AND WHITE. ANY HELP IN WIRING THEM TOGETHER THANKS MOE
Chuck Tribolet	posted 06-30-2008 10:27 PM ET (US) You need the manuals for each unit so you know what each color wire does. There's no standard. Post that info here for both units, and we'll help you. And you don't need to shout (ALL CAPS). Chuck
jimh	posted 06-30-2008 11:25 PM ET (US) NEMA is an acronym for the National Electrical Manufacturers Association. They don't have much to do with marine radios or with interconnecting them to GPS receivers. You probably are thinking of the NMEA, the National Marine Electronics Association. They developed the serial data protocols for interconnecting marine electronic devices. In your situation you probably want to connect the GPS receiver NMEA-0183 output to the VHF Marine Band Radio NMEA-0183 input. It is simple. You just identify the wire that is the GPS output and connect it to the radio input wire. Connect the two devices to common 12-volt power. It the radio has a differential input, connect the inverting input to battery negative.
jimh	posted 06-30-2008 11:28 PM ET (US) I see you are an engineer, so you'll be familiar with technical literature. The radio instruction manuals have all the details you will need. They clearly identify which signals are carried on what conductors. Once you get the wiring correct, it is just a matter of configuring the software. See what NMEA sentence your radio likes, and have the GPS send it. Again, the instruction manual has all the details.
David1877	posted 07-01-2008 01:14 AM ET (US) This is all too familiar. I completed this task about a month ago. The thread might be helpful. I connected my Lowrance GPS to my Standard Horizon radio. It was a snap. If you have trouble, Jim was a great resource in my case. Good luck.