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Author Topic:   SeaTalk Network Devices and Power
kjdsewer posted 05-28-2013 10:01 AM ET (US)   Profile for kjdsewer   Send Email to kjdsewer  
New at this. I have Raymarine a67 multi-display and Raymarine 49 VHF radio connected with SeaTalk. Do I need to connect power to each device and to seatalk?
thanks
jimh posted 05-28-2013 02:15 PM ET (US)     Profile for jimh  Send Email to jimh     
Yes.
jimh posted 05-29-2013 10:49 AM ET (US)     Profile for jimh  Send Email to jimh     
Raymarine has used their trade name "SeaTalk" to describe several versions of network connection and protocol for their devices. The present implementation is called SeaTalk NG where NG means "next generation." (This is often written with the NG as a superscript and in lower case, like SeaTalkng. But this is too awkward to reproduce unless styled-text is used, so hence SeaTalk NG instead.)

SeaTalk NG is essentially NMEA-2000 with non-standard network wiring appliances and connectors. You can read about the application of power to a NMEA-2000 network and how most devices on a NMEA-2000 network will require their own power connection in my article on NMEA-2000 at

http://continuouswave.com/whaler/reference/NMEA2000.html

Since you have described yourself as being new to this field, I think you will find the article to be a good presentation of the basics of NMEA-2000 network wiring.

If you have some older Raymarine devices that use a prior version of SeaTalk, I am not familiar with the intricacies of its wiring. Raymarine is typically a very good electronics supplier, and I would expect that their operating instructions or installation instructions will give you sufficient information and background on SeaTalk to be able to interconnect your devices and power them properly.

The difference between SeaTalk NG and normal NMEA-2000 wiring and configuration seems to be limited to just the change in the connector. The SeaTalk NG connector is a very small diameter connector and can be fitted through small holes in a bulkhead.

As I recommend in my article, if you are going to use devices from a manufacturer that uses a proprietary connector for NMEA-2000, you can construct your network backbone with those wiring devices. If you plan to mix other manufacturers' devices into the network, you can consider using a more standard wiring method for the backbone and buy or make adaptor cables for the non-standard devices.

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