DST800 with iTC-5 and e7D no speed

Hello,

I really hope you can help me with my problem. I have Raymarine e7D MFD I add to it DST800 for Depth/Temp/Speed via iTC-5 converter, power is connected to iTC-5 from battery and iTC-5 to e7D via SeaTalk NG Backbone Cable and SeaTalk NG T Piece. You will find diagram in my post. Depth and temp are showing on my e7D, but no speed. Please advice.

  iTC-5 Mynetwork.jpg (Size: 36.73 KB / Downloads: 1)