Raymarine E80 classic & NMEA 0183 connections

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Ian_Rob

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If I want to connect an AIS to a Raymarine E80 classic which has only one NMEA 0183 port [already connected to an Autopilot/Smart Pilot S2], I assume I will need to buy a multiplexer to allow this? Any recommendations for suitable multiplexers?
 
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There's a YAPP one coming. It will have 3 ins, 1 out. 2 of the ins will always be 4.8k. One of the ins and the out will be 4.8k or 38.4k but both must be the same speed which ever is chosen, i.e...

ins 4.8, 4.8, 4.8 to out 4.8
or
ins 38.4, 4.8, 4.8 to out 38.4
 
Thanks for the replies

I don't know really. Aside from the power there are two cables presently connected, one to the NMEA 0183 and one to the Seatalk/Alarm Out. The Seatalk 2 connection is not used. It may be that the autopilot is connected via the Seatalk rather than the NMEA but either way the NMEA isn't available.

The manual states the NMEA is for 'third party equipment [NMEA multiplexer, Fast heading sensor, RS232 interface, Autopilot, AIS receiver, Navtex receiver' ] so perhaps a multiplexer is a required?

Angus. How far off is your multiplexer?
 
Ian_Rob said:
I don't know really. Aside from the power there are two cables presently connected, one to the NMEA 0183 and one to the Seatalk/Alarm Out. The Seatalk 2 connection is not used. It may be that the autopilot is connected via the Seatalk rather than the NMEA but either way the NMEA isn't available.
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Your first task then is to find out what's connected to the NMEA socket. Chances are whatever it is could be connected via SeaTalk.
 
The only third party [non-Raymarime] equipment is an Icom 505 which displays GPS position, SOG, heading etc. I suspect it is that.
 
Ian_Rob said:
The only third party [non-Raymarime] equipment is an Icom 505 which displays GPS position, SOG, heading etc. I suspect it is that.
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If you still want to output GPS data from your E80 to the radio, you won't be able to input AIS data, as I doubt that the radio will accept GPS data at 38400 baud (although you could try). A multiplexer wouldn't help. Your cheapest solution would be to buy a simple GPS dongle to provide GPS data to the radio; you can then input AIS data to the E80. If you want to be able to display DSC distress messages on the E80, you will need to multiplex the DSC and AIS data to input it to the E80.
 
Ian_Rob said:
Angus. How far off is your multiplexer?
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A month if all goes well. Not sent the circuit board design off to China for manufacture yet as they are still on their big holiday. It will be a week or two for them to catch up when they get back.

Update: All 3 inputs and the output at the 2 data rates are working, although I can only test 2 of the 3 inputs at a time at the moment as I have only 2 sources.

lr1l.jpg
 
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If you have a Raymarine course computer, in all likelihood there is a fast heading sensor which goes to the NMEA input.

Has a similar issue and I installed an EasyAIS receiver which has a built-in multiplexer - so the fast heading data (4800) goes into the AIS and the output is 38,400 with both the AIS data and the fast heading data multiplexed together. Remember to change the NMEA port settings on the E80 for the higher speed.

The YAPP sounds interesting - especially when you see the prices of commercial multiplexers......
 
DipperToo said:
The YAPP sounds interesting - especially when you see the prices of commercial multiplexers......
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Just added everything up. They will cost £26 for an assembled circuit board, all the connectors etc, postage in the UK, but no enclosure (i.e. mount it in something yourself) for £26. Mounted in an enclosure will be £30.
 
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