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need help with Ray gps/heading sensor connection

Old 04-19-2008, 02:28 PM
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Default need help with Ray gps/heading sensor connection

Hi guys,

Trying to connect a new setup I have just installed. Ray C120 system pack.

Need help withe the GPS antenna connection...would like ot do this with Seatalk, but am unsure of which wires to connect.
Seatalk has: red +12v, black drain/screen??, and yellow +12v according to the manual
GPS has 5 wires...red, yellow,brown, green, and shield

Which to which??

Have a KVH heading sensor and vhf trying to connect via NMEA 0183. Just want input to vhf and only need output from sensor.
I was assuming I would connect the sensors + and - output to the Ray NMEA cable + and - input.

I was thinking of connecting vhf NMEA input + and - to Ray NMEA cable + and - output.

Is this corrcet thinking?

Thank you in advance!!

I secured the Airmar B164 today and ran the cable to the console...getting close to the end thanks to this site and a few friends!!

Brad
Old 04-19-2008, 05:53 PM
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Default RE: need help with Ray gps/heading sensor connection

Rs125 side------------C120 side
red & Green-----------red
yellow----------------yellow
brown & shield---------shield

The above will give you seatalk. If you are not using a land-based DGPS antenna on your Raystar 125 GPS receiver (most installations do not), you should connect the brown RTCM input to the shield wire (ground).
This will prevent outside RF energy from inadvertently injecting noise into the system.


Flashing RED
Unit is in bootcode, either being upgraded
or unable to boot.
Flashing ORANGE
Unit is running, but does not have a fix.
Flashing GREEN
Unit is running and has a fix.
1 flash every 2 seconds indicates NMEA connection.
1 flash every 4 seconds indicates SeaTalk connection.

The heading sensor will be the only input into the C120. UNLESS you buy a multiplexer. Because you can only have ONE input to the C120. A multiplexer would allow for your DSC input too.

option 1: Use the nmea 0183 input to run the heading sensor in at 38400baud. (be sure to set the C120 for that input speed under system setup.
option 2: Use the nmea 0183 input for the DSC input from VHF to see positions of DSC calls on plotter.
option 3: Use a multiplexer for heading sensor AND DSC input from VHF

Either way, the NMEA output is easy. That will be your GPS output from C120 (that will be from the seatalk in data from Raystar 125 GPS antenna that is automatically converted when nmea 0183 output is desired on C120).

The bummer is you have to choose, opt 1,2,3. In the short term, Is choose option 1. Again, be sure to setup the input to 38400baud vs 4800baud for most other nmea inputs.

If you want an excellent multiplexer with a back-up GPS input AND want the heading sensor input too, get this one.

http://brookhouseonline.com/pdf%20files/Mux_AIS_C.pdf

There you go!
Old 04-19-2008, 06:22 PM
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Default Re: need help with Ray gps/heading sensor connection

Thanks Hewes...

Thats along he lines of what I was thinking, but was unsure about the multiples connecting to the single, but sounds like that is the deal. Will do it tomorrow!

Anyone have any thoughts on the NMEA/vhf/heading sensor connection? These are my thoughts. Can anyone confirm or tell me different?

VHF side------------C120 side
NMEA in + -------------NMEA out + yellow
NMEA in - --------------NMEA out - brown

Sensor side----------C120 side
NMEA out + ---------NMEA in + white
NMEA out - ----------NMEA in - green

These connections would to be to one single NMEA cable supplied by Ray with the display unit.

Thanks in advance for any help!
Old 04-20-2008, 05:26 AM
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Default Re: need help with Ray gps/heading sensor connection

Anyone....Buhler...

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