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Hi Ian,
The A024 doesn’t have a GPS input – i would go for the A026 if you require an external GPS for the 0183 network – alternatively you can look into the A026+ if you also require N2K network compatibility/futureproofing.
Tech Team
HI
I have a problem interfacing my A024 NMEA0183 out to my Raymarine C80 NMEA0183 in. The C80 displays ‘NO AIS’ and I cannot see any data being received on the C80.
I have selected AIS 38400 on the C80 and swap the +ve and -ve around so I get positive going pulses on the +ve line, but to no avail.
I have even changed the baud rate to 4800 on the C80 and on the A024 still ‘NO AIS’ or data being received on the C80.
Any suggestions? What should the pulse height be? Should the C80 only display ‘AIS’ when it receives an AIS signal or should it display ‘AIS’ when an AIS receiver is connected and powered up?
Hi,
We have connected an A024 to our C70 in our lab, which is very similar to the C80. We have the following observations:
– The NMEA0183 connection works if the A024’s NMEA OUT+ is connected to the C70’s NMEA IN- and the NMEA OUT- to the NMEA IN+.
– If the C70 is not receiving GPS data, it won’t display any AIS data, so we connected an NMEA0183 GPS receiver to the A024’s NMEA input and had to wait until we got a GPS-fix.
– Both the A024’s NMEA output and the C70’s NMEA input has to be set to 38400bps.
– If there are no vessels with AIS transponders within the VHF range, the receiver will not get any AIS data.
We hope this helps.
Hi
Further to my last post. The C80 has A GPS fix via seatalk. On my next visit I’ll try and feed a gps fix via the NMEA 0183 input to the A024.
Problem solved. The A024 was working fine all along.
I had three issues.
1. Had to swap the -ve and +ve NMEA 0183 output going into C80. (so the the C80 had +ve going pulses on the +ve line)
2. It seems the C80 does not show AIS avaiable until it receives a valid signal from a vessel (not just connected to an working AIS receiver as the C80 Manual suggests).
3. My antenna was not good. Changed it to a different antenna and I started to get activations on the A024 (green light) and position, speed and course on the C80.
Happy days.
Hi
I still have a problem interfacing with my C80 plotter. I can see the pulses coming from the A024 NMEA 0183 out.
Notice I have swapped the +ve and -ve to give positive going pulses. but do not see anything being received by the C80 plotter.
The C80 states that the the display should also change from NO AIS to AIS when it detects an AIS receiver.
If the A024 output is normal then I may have an issue with my plotter.
I notice that the C80 outputs 11v on its’ NMEA output (feeding my VHF) does that imply the C80 need a higher voltage input signal?
Any suggestions
A024 and A026 was driven by 5V via USB. I think you need a protocol bridge to work with 12V’s NMEA interface.
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