I am trying to upgrade my electronics
network without replacing the existing instruments that are difficult to install (Wind and depth
transducers). I'm pretty handy with most things electronics/electrical, but hoping someone can shine some light on some confusion.
Here's a link to photos:
My overall goal is:
- Stay on my existing NMEA 0183
network (GPS, sonar, wind
- Add a dedicated display mounted on bulkhead to show Wind
. I purchased the Garmin
GMI 20 for this but haven't hooked it up yet.
- Add AIS
support for Navionics
(Digital Yacht AIT3000)
- Sonar transducer
temp) - NMEA 0183
Question 1) Lowrance Wiring
Everything I can find about the Lowrance NMEA
mentions a different color scheme than I have. There are two cables
going into the Power/Data port on the back of the display, one is Red/Black and I've connected it to power, the other had 5 wires: Blue/Black, Yellow/White, and unshielded ground. (see the photo
I linked above).
Here's the behavior I was able to deduce for the following connections. All other wires were disconnected from the terminal block unless mentioned below.
- Blue + ground = valid depth reading on display, no twtr
- Black + ground = valid depth reading on display, no twtr
- Yellow + Blue + ground = valid depth and twtr. (Removing black and white had no efffect)
- Yellow + ground = valid twtr, no depth
- Yellow + ground showed a steady 2.3v on volt meter.
Is anyone aware of a wiring
diagram for these Lowrance instruments?
- Digital Yacht WND100 transducer
(Wind) - NMEA
- Digital Yacht AIT3000
which is the "hub" of the network. It provides 2 NMEA 0183 inputs/outputs, GPS
, and creates a local WiFi
network to connect to an app like Navionics
GMI 20 MFD
Question 2) Multiplexing the wind data in
Once I have a grasp of the Lowrance wiring, I plan to multiplex it with the Wind data. Unfortunately, I confirmed with Digital Yacht that the Wind transducer does not have a NMEA LISTENER wire (it can only talk), which means I may need to buy a separate multiplexer unless it's possible that one pair of the Lowrance wires listed above are for LISTENING and I can aggregate the Wind data in with the Sonar. Once I know more about the Lowrance wiring, hopefully it'll become clear if I have access to a Listener or would need to buy a multiplexer.
This post already got pretty long, so I'll end it here. I'm open to any other suggestions that I may be overlooking!
Many thanks as always!