Seatalk2 to STng

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Kevin,

Q1: Can all the ST290 components be connected to a new STng backbone with spur cables (ST2 to STng)? This would include centralizing the transducers to an iTC-5.
A1: While all of the transducers may be shifted to an iTC-5, ST290 devices may not be interfaced as spurs to a SeaTalkng backbone. The following two options would be recommended for this system should you desire to keep the ST290 devices, bearing in mind that the ST290 system is no longer supported and has not been tested with the ST-STng Converter:
- option 1) Keep the ST290 system and backbone as it was initially designed to be installed. Install a SeaTalkng backbone to support the new products and install a SeaTalk to SeaTalkng Converter within the SeaTalkng backbone. Connect the Converter's SeaTalk port to the ST290 DPU's SeaTalk port to support bridging data between the SeaTalkng backbone and the the ST290 system.
- option 2) Install a SeaTalkng backbone to support the new products. The SeaTalkng backbone should include SeaTalk to SeaTalkng Converter and an iTC-5. An i70 MFID would be installed as a spur to the backbone. Connect the Converter's SeaTalk port to the ST290 DPU's SeaTalk port to support bridging data between the SeaTalkng backbone and the the ST290 system. In this case the ST290 system would simply repeat data from the SeaTalkng backbone. The i70 MFID would be responsible for calibration of the system's transducer. If selecting this option, then care should be taken to ensure that the currently installed wind transducer of the same design as Raymarine's E22078 Standard Forward Wind Transducer or E22079 Long Forward Wind Transducer.

Q2: Will a ST1 to STng converter transmit necessary data for the ST290 wind displays (ST1) to get wind data from STng? (wind xducer connected to iTC-5) As well as enabling the ST290 remote keypad (Seatalk1) to control the ST290 displays (Seatalk2/STng)?
A2: Yes

Q3: I know that ST2 was the earlier version of STng and wire conductors are the same, but in the interest of progress I'm trying to adapt forward to STng rather than adapting new components backward to Seatalk2. I just want to make sure they can be connected almost as if they're i70 displays and thus eliminate the DPU.
A3: See the response to Q1, as it is recommended that the ST2 backbone and DPU be retained should the ST290 Graphic displays will continue to be used within the system. Should the ST290 Graphic display be removed from the system then the remaining ST290 displays supporting SeaTalk communications protocol may simply be interfaced to a SeaTalk bus which in turn has been connected to the SeaTalk port of a SeaTalk to SeaTalkng Converter.