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[CA11] Raymarine A128 and S1G to NMEA 2000
11-26-18, 07:10 PM (This post was last modified: 11-27-18 09:28 AM by Chuck - Raymarine - Moderator.)
Post: #1
[CA11] Raymarine A128 and S1G to NMEA 2000
I have a 1998 Sea Ray that originally came with a Type 100 AP and a 650 Raypilot head. On the boat I have three Garmin 741xs units, two Fox Marine MEFI engine gateways and some other smaller equipment all on a NMEA 2000 backbone. I connected the NMEA 0183 I/O wires from one of the Garmins to the Type 100 NMEA 0183 ports and the autopilot worked well.

Earlier this year I purchased a P70R controller directly from Raymarine and a S1G AP used from Ebay. From reading an earlier post from Chuck, I knew the S1G allowed me to use the P70R and keep my existing autopilot wiring, pump, rudder sensor and fluxgate. Since I had no other Seatalk equipment I just used a Seatalk junction block and Seatalk to Seatalkng cable to the P70 and it works great. The P70R controller shows the course and waypoint name from the Garmin and the S1G tracks straight and true. The Garmins do not have the ability to control the AP but provide data via the 0183.

So finally the question...
Saturday I ordered an A128 MFD directly from Raymarine and want to add it to the NMEA 2000 backbone as well as have it share control of the S1G autopilot. Can I use the Converter kit #E22158 and connect the S1G to the yellow port, the A128 and P70R to the white ports and then the blue port (with terminator and devicenet female) to the end of my existing NMEA 2000 backbone? Will I still need the 0183 connection to the Garmin?

Thank you in advance,
Tim Daleo
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11-27-18, 09:41 AM
Post: #2
RE: [CA11] Raymarine A128 and S1G to NMEA 2000
Welcome to the Raymarine Forum Tim,

In order to use a p70/p70R/p70S/p70RS Autopilot Control Head with a S1/S1G/S2/S2G/S3/S3G autopilot course computer, the autopilot control head must be interfaced to a SeaTalk bus which is directly connected to one of the autopilot course computer's SeaTalk ports. When the system features a S1/S1G/S2/S2G/S3/S3G autopilot course computer, the p70/p70R/p70S/p70RS Autopilot Control Head should not be connected to a spur socket (white) within the system's powered and properly terminated SeaTalkng / NMEA 2000 backbone.

If a ST-STng Converter (w/latest software update) is installed and the Garmin 741xs units are also interfaced to the SeaTalkng / NMEA 2000 backbone, then the NMEA 0183 interface to the Garmin units may be eliminated.
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11-27-18, 11:27 AM (This post was last modified: 11-27-18 12:50 PM by Chuck - Raymarine - Moderator.)
Post: #3
RE: [CA11] Raymarine A128 and S1G to NMEA 2000
Thank you for the quick response. So do I leave the P70 connected to the S1G Seatalk port and then connect the second S1G Seatalk port to the converter? The A128 will just connect directly to the backbone? I have attached a simple diagram of the current network. I plan to eventually replace each Garmin with an Axiom type unit over the next few years.

Thank you again,

Tim


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11-27-18, 02:58 PM
Post: #4
RE: [CA11] Raymarine A128 and S1G to NMEA 2000
Tim,

Q1. So do I leave the P70 connected to the S1G Seatalk port and then connect the second S1G Seatalk port to the converter?
A1. Yes. In doing so, ensure that the red lead of the SeaTalk cable connecting the ST-STng Converter to the S1G is not connect to the red terminal of the S1Gs SeaTalk port. Instead, this red lead will be insulated to prevent shorting.

Q2. The A128 will just connect directly to the backbone?
A2. Yes. The a128 MFD will be interfaced to a spur socket within the backbone via an appropriate length of SeaTalkng Spur Cable.

Q3. I have attached a simple diagram of the current network. I plan to eventually replace each Garmin with an Axiom type unit over the next few years.
A3. If planning to install Axiom/Axiom Pro MFDs in the future, then it would not be recommended that an a128 MFD be installed within the system, as it would be limited to data available from the SeaTalkng / NMEA 2000 backbone. Instead, were an Axiom 12 or Axiom Pro S 12 MFD installed instead of the proposed a128 MFD, then all Raymarine MFDs within the future system would be capable of sharing all of the system's resources via the Ethernet network used to link the Raynarine Axiom / Axiom Pro / Axiom XL MFDs to one another. The a-Series MFDs cannot be interfaced to an Ethernet network which also features Axiom / Axiom Pro / Axiom XL MFDs.
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12-02-18, 06:32 PM (This post was last modified: 12-03-18 08:52 AM by Chuck - Raymarine - Moderator.)
Post: #5
RE: [CA11] Raymarine A128 and S1G to NMEA 2000
Chuck, thank you for the help. I installed the refurbished A128 yesterday and everything is connected and working properly on the network. The unit looks great!

Thank you again,

Tim Daleo


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12-03-18, 08:52 AM
Post: #6
RE: [CA11] Raymarine A128 and S1G to NMEA 2000
You're welcome.
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