Originally Posted by larza7777
Bought a boat and it has HDS-5 Lowrance plotter and Raymarine
SPX-5 autopilot. They both have Nmea 183 and i connected the wires but SPX-5 dont recieve data. I dont know how to solve this problem, can someone help?
Jari from Finland
I´m pretty sure, the HDS has a NMEA2000 port, check your installation-manual for this. If it is, then you can build a small N2k bus and both devices should work together.In the net you will find enough information about NMEA2000-Bus.
Ray`s Seatalk-STng is electrical
the same and in fact compatible with N2K.
To connect the SPX-5 as a device to the N2k-bus, use an N2k-cable with a male-plug on one side and an open-wires end on the other.
Connect the colored wires 1:1 to the STng-terminals of the SPX-5.
Only the12V-Wires are critical, thats why dont`t swap the red / black wires, that will give you trouble !!!
Preferably connect the 12V bus-power to the same as the two devices, cause it must be powerd up before you switch the devices on.
If you have questions/problems with the Bus-Design better ask me again before you connect the devices.
May be you still need to enable the N2K-Port in the HDS-5, I'm not sure about that, but usually not.The HDS should now be able to send routes or waypoints to the SPX and you now can also receive the combined fluxgate/gyro-course datas from the SPX-5.
For better acuracy of the SPX´s course-datas execute the autopilots compass- compensation- and equalising-routine from time to time.
Depending on the type of your Raymarine autopilot control panel
, you still have to confirm the current
track so that the pilot will follow it.
Imho that should be all.
The investition in the N2k-bus gives you a future-bonus to your navigation equipment
If a log is established at the HDS the SPX-5 can also receive and use these datas to increse the steering-performance of the autopilot.
Furthermore you can expand/ use the N2k-bus with additinal components, f.ex. AIS
I think the N2k-Bus is the better solution for your problem.
hope it helps you,
Sailors greetings from the Island of Ruegen,