I just installed new GSM 30 to work with my c80 Display. It all seems to be working correctly. I get the fish finder icon on the c80 display.

I want to connect my existing depth transducer which has a 2 lead (positive and negative) output to the the GSM 30 which has a 7 pin T/D connector. Is there an adapter for this? Do I need to change the depth transducer?

GPS - Raymarine - C80 GPS Receiver