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Pete
Pete, Electronic Engineer
Category: Marine Electronics
Satisfied Customers: 16706
Experience:  Over 16 years of experience installing and repairing electronics.
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I need to connect my GPS Map 640 to an older auto helm St

Customer Question

I need to connect my GPS Map 640 to an older auto helm St 4000.
The connection on the control head on auto helm says NMEA + and-. There also are Sea Talk slots?
Submitted: 11 months ago.
Category: Marine Electronics
Expert:  Pete replied 11 months ago.
Hi Ron,You can connect the Autohelm to the GPSMap 640 via the ST 4000 NMEA 0183 "in" terminal.
Customer: replied 11 months ago.
Hi Pete,
Sorry your answer isn't sufficient.
There is no "in" terminal. Also, there are different colored wires on the Gps. You don't tell me which goes where. I do not want to pay for your answer.

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