How To Replace and Improve the Sea Ray Systems Monitor

Discussion in 'Electronics Q&A' started by ttmott, Feb 5, 2019.

  1. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    The display on the SR Systems Monitor had died long ago so I did quite a bit of research then retrofitted the hardware and greatly improved the entire system; All for about the price of the SR display alone. The basic pieces are 1 Maretron DSM410 display module, 1 Maretron RIM100 run indicator module, 1 NEMA 2000 backbone and drop cables, 1 Blue Sea fuse block, some wire, and diodes. This is the end result, the wire diagrams, and installation photos. The Maretron DSM410 is an impressive piece of hardware and it's capabilities are far beyond the original Systems Monitor; some of the additional features I've incorporated (the data was already on the NMEA 2000 network) include trim tab position, rudder position, navigational data, engine data, depth transducer data, and much more. But, this post is about the capability for the systems monitor features I set up....
    Now, for the systems monitor, I limited the monitoring channels to six as that was the total available with one Maretron RIM100; more RIM100 modules can be added but for my purpose six channels were adequate. With that said to reduce from the nine Sea Ray monitored elements to six channels I combined the three bilge sump pumps to one input using shottky diodes to prevent one pump's "on" signal powering up another pump (see the attached schematic) and eliminated the shower sump as a monitored signal.
    So, should one of the monitored systems become "active" (like the generator shutting down unintentionally) the Maretron DSM410 display line item turns red, an audible alarm sounds, and an alert indicator comes on in any of the display's screens. A press of the power button acknowledges the alarm and silences the horn. As an additional important feature an integrated counter and timer records how many times and how long an alarm occurs; this is important should the bilge pumps cycle on and off to keep a water leak at bay this data is available and a component of the alarm. A much improved and superior systems monitor.... Recommend.
    The first, second, and third images show the monitor in normal (no faults) mode, one of the three bilge pumps running, and how an alert appears in another screen.
    The fourth image is the installation where the original SR monitor system was installed and the installation of the new components in the lazarette.
    The fifth image is the NMEA 2000 network under the helm.
    And, the sixth and seventh are the wiring diag's.
    Maretron Display 3.jpg
    Maretron Display 2.jpg
    Maretron Display 1.jpg
    Maretron RIM100 Installed.jpg
    View attachment 64912
    NMEA 2000 under helm.jpg
    52DB Data Network Systems Monitor page 1.jpg

    52DB Data Network Systems Monitor page 2.jpg

     
    Last edited: Feb 7, 2019
    Rusted Nut and scooper321 like this.
  2. scooper321

    scooper321 Active Member SILVER Sponsor

    684
    Jul 4, 2015
    Baltimore, MD
    Listed for sale: "Lollygagger" 2003 320DA
    Boat Under Contract: Name TBD, 2003 400DB
    Now: Twin 5.7L Horizon Mercruiser (350 MAG MPI) V-drives
    Forthcoming: Twin Cummins 6CTA-8.3
    Sweet. So did you use something like a 20v or 30v diode? Just for margin? And why 3a diodes and 5a fuses? Do those lines carry that much current? Not challenging you, just trying to save myself from pouring over the specs. Lol.
     
  3. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Sorry that's an error - they are 15A 45V diodes. I'll correct the post....
     
  4. rdevans

    rdevans Member

    70
    Sep 22, 2009
    Chesapeake Bay
    340 Sundancer 1999
    454 V-Drive
    first let me say this is a very elegant solution. Two issues.. 1) the symbol for the diode is a Zener diode. not a big deal.
    2) since the data sheet says you can connect the inputs to either + or -, that would lead you to believe the input circuit is a comparator. Thus just a small amount of current would flow into the input. The use of 15A fuses would be way overkill and could cause something to burn up if there is a short on the sensor. Suggest reducing the fuse current.
     
  5. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    I'll try to fix the image on the diodes but limited on the graphics. The fuses are 5A which are per the Maretron literature.
     
  6. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    What's the total cost?
     
  7. scooper321

    scooper321 Active Member SILVER Sponsor

    684
    Jul 4, 2015
    Baltimore, MD
    Listed for sale: "Lollygagger" 2003 320DA
    Boat Under Contract: Name TBD, 2003 400DB
    Now: Twin 5.7L Horizon Mercruiser (350 MAG MPI) V-drives
    Forthcoming: Twin Cummins 6CTA-8.3
    15A diodes? Is that a Maretron spec too? Or is that what Sea Ray had in the monitor? Or is it because these are connected to bulge pump power lines? I can envision some serious current spikes when those pumps kick on, so this would make sense.
     
  8. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    The purpose of the diodes are to prevent voltage/current "back feed" to the other bilge pumps tied to a single monitor circuit should one come on and would, without the diodes, consequently power up the other pumps; this condition would probably trip the active pump circuit breaker however in reality the 16ga wire would probably limit the current. In discussions with Maretron the RIM100 is insensitive to current/voltage transients however must be protected with 5A fuses.
     
  9. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Hardware specific to the Systems Monitor replacement is around $1200
    I did all of the installation myself but to include the entire NMEA backbone, cleaning out old/abandoned wire, and Fusion audio system probably 80 hours.
    This is the pile of wire and hardware extracted just from the bridge during the installation:
    IMG_3222.jpg
     
    Cocktail Time and dtfeld like this.
  10. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    A bit of discovery for those with Cummins QSM11's and maybe others regarding the Sea Ray Systems Monitor.
    Two of the wires (green) connected to the systems monitor module are shown in the owners manual as for port and starboard exhaust temperature. In verifying the functional operation of each input, I could not get the exhaust over temperature to respond on those wires. When putting a shorting clip over the temperature switch on the exhaust pipe the appropriate fault appeared in the Vessel View 7 (it is shown as a raw water flow fault) however, nothing on the systems monitor wiring. So, I opened up the engine harness and behold, found those green wires neatly clipped and taped away; not used; nada.. In reviewing the Cummins engine wiring schematics it ends up there is no user interface for the exhaust over-temp switch; it's a dedicated input to the engine's ECM. I'm hesitant to mess with any of the Cummins engine harness wiring so I guess there are now two additional inputs to the Maretron RIM100 which I'll probably now revise to add.... Doing things twice is painful, especially where this is installed..... Revised wiring diag below -
    52DB Data Network Systems Monitor RevA.jpg
     
    Last edited: Feb 9, 2019
  11. Jeremygavin

    Jeremygavin Active Member SILVER Sponsor

    890
    Mar 6, 2012
    Cape Cod, MA
    2011 520 Sedan Bridge
    2016 Sea Ray 19 SPX OB
    Cummins QSM11s
    Mercury 150 Fourstroke
    This seems like a great upgrade to the stock system. Nice work.
     
  12. Havana Shamrock

    Havana Shamrock Well-Known Member SILVER Sponsor

    Sep 9, 2008
    Long Island. N.Y.
    2005 500DB
    Furuno Tztouch2 12” MFD x2
    Furuno NXT radar
    Furuno Navpilot
    QSM11's,
    Honda 30HP
    Sea Doo 90 HP H.O.
    TTmott I’d like to get rid of my systems monitor and replace it with your set up but it may be a bit above my pay scale once I heard “diode”. I’m pretty good with 12vdc and 110vac but not electronics . I’d need you to make this system plug and play:D
    I did remove all nmea0183 wiring from the helm and had the same bundle you did.
     
    JVM225 likes this.
  13. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Diodes are gone due to the elimination of the exhaust over temperature sensors and now enough channels for all of the bilge pumps - it is plug and play...
    The Maretron DSM410 manual is 275 pages focus on section 7 for the programming.
     
  14. rsimonia

    rsimonia New Member

    12
    Nov 9, 2014
    Merritt Island, Florida
    2002 410EC
    Twin Cummins diesels
    Really appreciate you posting the plans, I was thinking of a similar Marathon setup for my 410EC, since the DDU died. I’ve already replaced it once and don’t feel like shelling out that kind of money again for such a failure prone product! Where was the interface module in your ‘52? I haven’t pulled the panel next to the engine room breakers yet or the switch panel in the salon.
     
  15. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    In the starboard side of the lazarette on the engine room bulkhead outboard of the DC main breaker panel is where the SR Systems Monitor module was on the 52DB.
     
  16. SKybolt

    SKybolt Member

    307
    Nov 11, 2014
    Long Island, NY
    1988 460 EC Sea Ray. w/12.5K Westerbeke Genset.
    Twin 6v92TA Low profile's (475hp) with Alison Gears.
    ttmott - Very nice. Almost looks like some of my screen shots. I love the Maretron devices they do a really nice job with there products. I only wish they made a sun cover for the DSM410.

    Question, what are you using for the audiable alarm?

    As stated the nice thing about using NMEA2000 is that you can add so many other things and have much more then jsut a system monitor. Good Luck and Great Job!
     
    Last edited: Feb 11, 2019
  17. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Only what is with the DSM410 but that is not loud enough to hear while underway. I'll probably add the Maretron ALM100 alarm module later.
     
  18. Olysan

    Olysan Member

    41
    Mar 17, 2018
    1994 400 Express Cruiser
    7.4 MPI
    Nice work and thanks for the detailed documentation.
     
  19. SKybolt

    SKybolt Member

    307
    Nov 11, 2014
    Long Island, NY
    1988 460 EC Sea Ray. w/12.5K Westerbeke Genset.
    Twin 6v92TA Low profile's (475hp) with Alison Gears.
    Thats what I think I will be doing as well. It's a shame they didn't add the ability to have an external non-NMEA2000 device trigger the alarm as well. That would be very useful, especially for what they are charging for a sounder ...
     
  20. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Maretron does - it is their SIM100 module.
     

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