[DG] [DG11] 400G AST, ST6001+ auto pilot system malfunctioning

[Chuck - Raymarine - Moderator]

Neil,

Q1) the existing rudder reference transducer, as previously deployed with the to be retired 400g ast course computer, can remain and be connected to the new ACU-400, or do I need to swap that out for the new one that came with the EV-1/ACU-400/P70S kit?
A1) should the currently installed rudder reference transducer be operational, then it may indeed be retained for use with the ACU-400

Q2) it is sufficient to connect the ACU-400 dedicated drain conductor to the boat’s electrical bonding system, or alternatively to the negative bus at the dc panel? Or can the drain conductor just be jumped to the negative power connection, which essentially leads back to the same dc panel negative bus?
A2) Please click here to view a FAQ addressing this subject.

Q3) will it suffice to connect the EV-1/ACU-400/P70S/RS130 Seatalkng bus to the Seatalk bus via a Seatalkng/Seatalk converter connected to the nearest available Seatalk connected device?
A3) This is indeed satisfactory. Please click here to view a FAQ addressing this subject. Per the FAQ, please ensure that the SeaTalk bus will be powered only via the SeaTalkng backbone via the SeaTalk to SeaTalkng Converter. Please additionally note the maximum number of SeaTalk devices which a SeaTalk bus may contain for each SeaTalk to SeaTalkng Converter installed within the SeaTalkng backbone. Finally, it is considered to be a best installation practice to power the SeaTalkng backbone from a dedicated switched circuit using a spure located at the approximate midpoint of the backbones LEN load, rather than from an autopilot's ACU / course computer.