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E120 Classic and Network Update to STng
06-13-17, 01:05 PM
Post: #1
E120 Classic and Network Update to STng
Hi - I have an E120 Classic MFD and ST1 network throughout my boat (installed in 2007). I recently purchased an i70s Multifunction Display RS 130 GPS Sensor and all the components to build a STng throughout my boat.

I am having some difficulties with some of the old ST1 instruments and the ST2 Keyboard, and in particular, I cannot see any of the ST1, ST2 or STng instruments under Menu/System Diagnostics/External Interfaces/SeaTalk or SeaTalk NG. The MFD freezes when I select Menu/System Devices/External Interfaces/SeaTalk NG.

All of my devices have the most recent software upgrades installed, including the ST1-STng Converters.

Attached are three SeaTalk Wiring Diagrams that I have devised for my new SeaTalk system.
- Mat-Lau III Proposed (1) installs a STng backbone throughout the boat and uses two ST1-STng Converters to split and interface the ST1 network. The ST1 network is not connected to the MFD directly with an E120 - ST1 connector cable.
-Mat-Lau III Proposed (2) maintains the original ST1 network and connects the ST1 network to the MFD via the original E120 - ST1 connector cable. The STng instruments are connected to the MFD via a seperate STng backbone via an E120 - STng connector cable. This option provides the least disruption to my original ST1 network.
-Mat-Lau III Proposed (3) is another variation to Proposal (2).

Can you please review my network diagrams and comment on which is the best arrangement and the one that is likely to give me the least amount of grief. Will these network arrangements work OK? I would prefer to leave the existing ST1 network in tack as much as possible in order to avoid extensive rewiring.

Best regards - Kevin Hiscox
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06-14-17, 02:17 PM
Post: #2
RE: E120 Classic and Network Update to STng
Kevin,

I had no luck in contacting you at the number provided.

The E-Series Classic MFDs had very limited support for SeaTalkng diagnostics. Support did not include listing SeaTalkng devices and the symptom reported when commanding the MFD to list the SeaTalkng devices does not surprise me. Should a SeaTalk bus including SeaTalk device be interfaced to the MFD, then the MFD will be able to produce a list of the SeaTalk devices from the MFD's diagnostics options. However, it may be necessary to execute the command more than once as some of the devices on the SeaTalk bus may not be listed. It should be noted that the MFD will not list SeaTalk devices which have been interfaced to the system via a SeaTalk to SeaTalkng Converter.

Within each of the diagrams provided, the AIS650 is shown as being powered/connected to the SeaTalk bus ... this is not correct. The AIS650 should be powered from another 12V source.

Within each of your diagrams, LEN loading within the SeaTalkng backbones must located within a spur socket positioned at the approximate midpoint of the backbone's LEN load.

Within each of your diagrams, it is noted that these are fairly large SeaTalk busses. It may be advisable to power the SeaTalk bus from both ends to ensure sufficient power. Should the S3 be powering the SeaTalk bus, then it would be recommended that the 12V circuit supplying power to the autopilot also supply power the the opposite end of the SeaTalk bus.

I would not recommend Proposed(1) should the SeaTalk bus be already in place ... primarily because you are currently cruising and it may require greater installation activity and risk. Instead, chose either of the other two solutions lacking the SeaTalk to SeaTalkng Converters.
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06-15-17, 07:59 AM (This post was last modified: 06-16-17 07:05 AM by kevinvh.)
Post: #3
RE: E120 Classic and Network Update to STng
Thanks Chuck for your valuable critique. Think I will adopt Proposed (2) with your modifications to the AIS650 power source and the power injection point to the STng backbone. I will try running the two ST1 networks with the current single point power source from the S3, and inject power to both ends of these networks if it proves to be problematic.

One more question, I plan to replace the ST2 Keyboard with a G-Series Command Centre Keyboard - are there any issues here or special setup instructions? Think I have a broken data cable in the ST2 Keyboard as it powers up and beeps to each keystroke, but no longer responds to keystrokes.

Thanks again - Kevin Hiscox
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06-15-17, 10:00 AM
Post: #4
RE: E120 Classic and Network Update to STng
Kevin,

You're welcome. Both the G-Series Command Center Keyboard and G-Series Mini-Keyboard are both compatible with E-Series Classic MFDs, bearing in mind that some of the functions of the G-Series Keyboards are specific to G-Series system.
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