Maretron DSM410 / J2K100 / J1939 Onan programming

[ocgrant]

Good deal in case anyone interested
https://www.ebay.com/itm/Maretron-J...-/363306106888?_trksid=p2349624.m46890.l49292

 

[Dunigan]

Grant, I am trying the same project on my boat. Sorry for bringing this discussion back from the past but...How did you reconnect W5? Did you have to remove the NIM and solder a jumper? Thanks.

 

[Dunigan]

Henry Boyd, did you end up just adding a second cummins remote at your helm station?

 

[Henry Boyd]

Henry Boyd, did you end up just adding a second cummins remote at your helm station?

It's still on my list. I had planned to do it this past spring, but I ended up having to get the props tuned and just like that my discretionary project money went poof.

For me a second control panel at the helm makes more sense. It gives me the feedback from the engine, as well as the ability to shut it down while at the helm. We run with the gen going most times for the fridges, ice maker and helm AC so the added control would be nice.

We probably have the same gen, and no doubt yours has the same features.

 

[Dunigan]

I agree. The 2nd remote makes great sense but I don't have a good spot for it at the helm station (too much space consumed by dual VesselViews). I can tap into my Furuno equipment using the Maretron converter but won't see hours, volts, or hertz. Thanks for your reply.

 

[ocgrant]

Grant, I am trying the same project on my boat. Sorry for bringing this discussion back from the past but...How did you reconnect W5? Did you have to remove the NIM and solder a jumper? Thanks.

I used a dremel to grind away the epoxy around the wire, then soidered a new jumper cable to both ends and put some silicone to seal it up.

 

[Dunigan]

and you removed the NIM to do this, right? The NIM is just a board secured inside the case with nothing attached on the backside? Thanks.

So:
1) solder W5
2) cut W2
3) attache Deutsch cable and connect to Maretron converter
4) connect to Nmea2k backbone.

Any programming of the converter...234 address, instance 10 or since it was a Cummins version, did you get gen data right away?

 

[ttmott]

and you removed the NIM to do this, right? The NIM is just a board secured inside the case with nothing attached on the backside? Thanks.

So:
1) solder W5
2) cut W2
3) attache Deutsch cable and connect to Maretron converter
4) connect to Nmea2k backbone.

Any programming of the converter...234 address, instance 10 or since it was a Cummins version, did you get gen data right away?

Why are you putting W5 back together?

 

[Dunigan]

I have the Smartcraft board. To convert it to J1939, W5 needs to be connected and W2 cut. At least that is my understanding of things and why Grant reconnected W5. Of course, it may be easier to use your method of putting the resistor in the data cable as you described in your earlier posts. We really don't know if the Maretron Deutsche cable has a resistor in it but his method worked without an external one. The Feb 7 posts on page 2 mention this.

 

[ttmott]

I have the Smartcraft board. To convert it to J1939, W5 needs to be connected and W2 cut. At least that is my understanding of things and why Grant reconnected W5. Of course, it may be easier to use your method of putting the resistor in the data cable as you described in your earlier posts. We really don't know if the Maretron Deutsche cable has a resistor in it but his method worked without external one. The Feb 7 posts on page 2 mention this.

OK I think you are doing it correctly. I had assumed you had the OEM Smartcraft cable and Y adapter which has the resistor with it. If you are connecting a new cable between the NIM and J2K100 then re-connecting W5 and adding a resistor at the other end of the new cable would be one way to go.
OR - don't mess with that expensive NIM other than cutting W2 and simply add 60 Ohm resistors to both ends of your new cable; which is the way I'd do it...

 

[Dunigan]

Good suggestion re the resistors. Would that be two 60 ohm resistors, one at each end? I am totally clueless on NMEA networks but will have a tech helping me.

BTW, the reason I don't have the SC cable is my boat is an early SC2.5 where Can V was eliminated but the SC NIM was included with the Genset. My VV1.5 displays are gen data capable (using the old Can V system). They also speak NMEA0183.

 

[ttmott]

Good suggestion re the resistors. Would that be two 60 ohm resistors, one at each end? I am totally clueless on NMEA networks but will have a tech helping me.

BTW, the reason I don't have the SC cable is my boat is an early SC2.5 where Can V was eliminated but the SC NIM was included with the Genset. My VV1.5 displays are gen data capable (using the old Can V system). They speak NMEA0183. Perhaps the Smartcraft NIM was converting data to NMEA0183. I have no idea but would much rather get the Genset data on the VV1.5 units. Here is a link to the VV manual. cummins-smartcraft-vesselview-digital-display-manual

In this case you are not NMEA but rather SAE J1939 signal from the NIM. The Maretron J2K100 converts SAE J1939 to NMEA 2000. Regardless, for NMEA 2000 and SAE J1939 you need 120 ohm resistors on both ends of the data network for a total load of 60 ohms. Forget NMEA0183; nothing you are doing will communicate with it, it will not work at all.....
Technically - NMEA0183 is a simplex network where receiving signals are on one pair of wires and transmitting signals are on another pair of wires. NMEA 2000 on the other hand is a duplex network where one pair of wires take care of both receiving and transmitting using IP packet formats. The two shall never meet.

 

[Dunigan]

Thanks and understood.

 

[alnav]

Good suggestion re the resistors. Would that be two 60 ohm resistors, one at each end? I am totally clueless on NMEA networks but will have a tech helping me.

BTW, the reason I don't have the SC cable is my boat is an early SC2.5 where Can V was eliminated but the SC NIM was included with the Genset. My VV1.5 displays are gen data capable (using the old Can V system). They also speak NMEA0183.

I'm not sure your original plan wouldn't work. I would not necessarily give Mercury's advice 100% credibility, especially wrt diesel installations as I think they regard them as orphan stepchildren.
So, you have the Onan NIM configured for SC, but the interface port is not used? Are you sure the SC cabling you have omits the generator signal wires? I would check the SC connector at the helm to see if they are still there. Here's a schematic of the harness:

The relevant SC wires are orange and green. If you have them, I don't see why you couldn't splice in to the SC cabling in the ER. Sounds like you are going to need to wire up a Deutsche from the generator in any event using the same wiring. I think I would give it a try, perhaps with ad hoc wiring just to see if it works. I don't see that it could hurt anything.

 

[ttmott]

I'm not sure your original plan wouldn't work. I would not necessarily give Mercury's advice 100% credibility, especially wrt diesel installations as I think they regard them as orphan stepchildren.
So, you have the Onan NIM configured for SC, but the interface port is not used? Are you sure the SC cabling you have omits the generator signal wires? I would check the SC connector at the helm to see if they are still there. Here's a schematic of the harness:
View attachment 112717
The relevant SC wires are orange and green. If you have them, I don't see why you couldn't splice in to the SC cabling in the ER. Sounds like you are going to need to wire up a Deutsche from the generator in any event using the same wiring. I think I would give it a try, perhaps with ad hoc wiring just to see if it works. I don't see that it could hurt anything.

Al
That OEM SC harness you show routes from the Generator NIM (the two pin and resistor) to the Engine Harness at the port engine. Not the helm. This generator harness plugs into where the CAN 1/CAN 2 combined resistors is for the engine at the engine then that CAN 1 and 2 resistor removed to plug the generator harness in now plugs into the generator harness as shown in your schematic. The CAN 3 (V) resistors are located at the NIM as stated on that harness as you show and the second one at the helm in the J-box where the Diesel View plugged in. Some SR boats had a CAN 1/CAN 2/CAN3 combined resistor installed in the J-box at the helm to take care of all three networks.
Now, if the OEM SC harness is going to now be used to interface with a Maretron J2K100 there are two ways to do it. You could either interface at the J-Box under the helm where the CAN 3 resistor is or at the engine end of the generator harness like I did it.
Tom

 

[Jeremygavin]

I have been following this thread all year because I want to get my genny data on my displays at the helm. I don’t have any major work to do this winter so it is a good winter to do the upgrade.
I am trying to understand what exactly I need to do to get it done. I have re-read the thread today and I still am not clear on what I have to do. I apologize if I am asking to have the information repeated but I can’t seem to wrap my head around it. Here is my situation. 2011 520DB with Onan MDKBP1R1V. The boat had a Smartcraft SC5000 at the helm until I replaced it with a VV702. When I did that I lost the genny info at the helm. I added an Onan remote panel in the salon to get the information back in a quick way as at the time I didn’t want to get into figuring out getting the info to N2K.
It sounds like I have the SC NIM. I have a Maretron J2k100 on order. Do I need a Maretron display in order to program the J2k100? Do I need to connect the J2k100 at the genny or can it be connected at the helm to the SC harness? I have N2k backbones at both locations so either works but I want to keep it as easy as possible. Do I need resistors even with the SC harness that is in place? Do I need to deal with the W5 wire or not given what I have? Thanks for your time and sorry if some of this was redundant.

 

[alnav]

Al
That OEM SC harness you show routes from the Generator NIM (the two pin and resistor) to the Engine Harness at the port engine. Not the helm. This generator harness plugs into where the CAN 1/CAN 2 combined resistors is for the engine at the engine then that CAN 1 and 2 resistor removed to plug the generator harness in now plugs into the generator harness as shown in your schematic. The CAN 3 (V) resistors are located at the NIM as stated on that harness as you show and the second one at the helm in the J-box where the Diesel View plugged in. Some SR boats had a CAN 1/CAN 2/CAN3 combined resistor installed in the J-box at the helm to take care of all three networks.
Now, if the OEM SC harness is going to now be used to interface with a Maretron J2K100 there are two ways to do it. You could either interface at the J-Box under the helm where the CAN 3 resistor is or at the engine end of the generator harness like I did it.
Tom

Tom, I was actually speaking to the notion to use the OEM harness (if capable on Dunigan's boat) to route the CAN signal from the NIM to his VV1.5, as he appears to prefer to wait on NMEA 2000 conversion if possible. Agree the resistors need to be done correctly whichever way he goes.
I am actually tapping the generator CAN signal at one of my J-boxes under my helm. I built a 10-pin (purple) connector that runs to my J1939 converter, then to NMEA 2000. I am thinking I didn't get the resistors right and this may explain why I seem to be the only one of us who converted who is not getting generator hours.

 

[Shaps]

I have been following this thread all year because I want to get my genny data on my displays at the helm. I don’t have any major work to do this winter so it is a good winter to do the upgrade.
I am trying to understand what exactly I need to do to get it done. I have re-read the thread today and I still am not clear on what I have to do. I apologize if I am asking to have the information repeated but I can’t seem to wrap my head around it. Here is my situation. 2011 520DB with Onan MDKBP1R1V. The boat had a Smartcraft SC5000 at the helm until I replaced it with a VV702. When I did that I lost the genny info at the helm. I added an Onan remote panel in the salon to get the information back in a quick way as at the time I didn’t want to get into figuring out getting the info to N2K.
It sounds like I have the SC NIM. I have a Maretron J2k100 on order. Do I need a Maretron display in order to program the J2k100? Do I need to connect the J2k100 at the genny or can it be connected at the helm to the SC harness? I have N2k backbones at both locations so either works but I want to keep it as easy as possible. Do I need resistors even with the SC harness that is in place? Do I need to deal with the W5 wire or not given what I have? Thanks for your time and sorry if some of this was redundant.

@Jeremygavin
You will need to convert your smartcraft NIM to the J1939 version which involves the jumpers mentioned above.
Repairing jumper W5 and cut W2. (In my particular install, I wound up having a bad NIM and bought a J1939 NIM, but others here have done this conversion successfully)

Put the board back in, connected the Maretron J2k100 to the deutsch 12 pin connector via maretrons cable.

I then put the J2k100 onto the NMEA2k network that I had a drop cable to in my Engine Room and back to the helm.
As long as your N2k network has a terminator at each end, I'm pretty confident this will work for you too.

 

[ttmott]

@Jeremygavin
You will need to convert your smartcraft NIM to the J1939 version which involves the jumpers mentioned above.
Repairing jumper W5 and cut W2. (In my particular install, I wound up having a bad NIM and bought a J1939 NIM, but others here have done this conversion successfully)

Put the board back in, connected the Maretron J2k100 to the deutsch 12 pin connector via maretrons cable.

I then put the J2k100 onto the NMEA2k network that I had a drop cable to in my Engine Room and back to the helm.
As long as your N2k network has a terminator at each end, I'm pretty confident this will work for you too.

You do not need to repair W5 if the OEM harness is still there. Don't mess with that. Only cut W2 to convert the NIM from Smartcraft to SAE J1939.
In @Jeremygavin situation he had the data and all of the infrastructure is in place including the resistors.
He can simply connect the J2K100 at the J-Box in the helm or overhead where the end CAN 3 resistor is. As a note that end resistor may be a combined CAN 1,2, and 3; you need to look at.
You are looking for trouble and complications by attempting to repair that W5.

 

[Dunigan]

Am running out to dinner but here are two bits of info. My 2013 SC2.5 boat still has Can V wiring from the j boxes to the VV1.5 units. All other Can V wiring is gone. Attached is a pic of the Can V wiring for the SC2.2 units that support gen data to the Diesel View or VV1.5 (not the later VV units). This harness connects to the 'smart' j box that is powered. I would have to duplicate this wiring or figure out a suitable alternative. Mercury has told me that SC2.5 doesn't support Can V which I take to mean that the SC2.5 software won't cooperate even if I duplicate this bus. I won't attempt it unless someone has already successfully done so and can tell me how to do it.