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  • MAXX cable pin outs

    sorry about this people, I'm so frustrated right now.
    the cable on the MAXX site picture has a serial port on one end, mine does not.
    a buddy can make me a connector if he know's the pin out's, RX TX etc, anyone have this info ?
    cheers Simon

  • #2
    bump. Anyone willing to buzz out their cable? I tried using a commonly found DB-9 to PS/2 adapter intended for adapting PS/2 to serial mice but still can't get online. I'm pretty sure my USB serial adapter is working because I can talk fine to the Innovate devices in my car.

    I'm not very confident about buying a dedicated DB-9 to PS/2 cable because it's probably wired identically to using an adapter.

    -chris
    1988 M3
    2007 Lotus Exige S

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    • #3
      The maxx came with a serial port to usb adapter, but I could not get it to work. I use the same one for the lc-1. Bought it at Radio shack. Nothing special. You should be able to buy one nearly any where.

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      • #4
        I'm just looking for info on the cable that goes into the Maxx.

        I've got one of these USB adapters:
        http://www.tripplite.com/en/products...xtModelID=3914

        Which has a DB-9 connector. The Maxx has a 6-pin mini-din aka PS/2 connector on it.

        What cable are you using between your usb serial adapter and the Maxx? The one supplied with the kit or are you using something off the shelf?

        -chris
        1988 M3
        2007 Lotus Exige S

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        • #5
          One off the shelf. I could not get the one that came with the maxx to work. If you are having problems, it probably has to do with the install of the serial/usb adapter on your computer. I had the same issue. Go to start and to the Devices and make sure it is getting a signal. Most of the time I have had problems if I switch ports, so I just use the same computer port every time.

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          • #6
            Interesting... I've got a different USB-serial adapter coming in the mail that outputs old school +/- 12V over the serial connection instead of the +/- 5V that the keyspan does.

            RS232 is interesting in that there is no spec as to what voltage levels are required outside of it has to be greater than +/- 3V but less that +/- 25V. Lots of old school devices (and I think the Maxx might fall into this) don't work reliably at signal voltages around +/-5V. The downside of the higher voltages is that you can't run the interface as fast but I think the Maxx talks at 9600 baud so should be ok.

            Where did you buy your cable? I hit up fry's and picked up a PS/2 to serial adapter.

            -chris
            1988 M3
            2007 Lotus Exige S

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            • #7
              Chris,
              I don't know if you are asking me? But, if you are, I picked mine up at Radio Shack.

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              • #8
                Got my cable and it does have a different pinout than the commonly found ps/2 <-> DB9 cable and adapters out there. So don't lose your cable! It's pretty much straight through connections of pins 2, 3, 4, 5.

                DB9 Female End:


                Mini-DIN 6 aka ps/2:


                Code:
                DB9   PS/2
                2       2
                3       3
                4       4
                5       5


                -chris
                1988 M3
                2007 Lotus Exige S

                Comment


                • #9
                  Thanks for posting the pin outs. I just tested the continuity of the cable that came with my Maxx unit, and they match what you posted.

                  I get an error message saying RS232 timeout after trying to establish a connection. I know the USB to serial cable works fine because I've used it to configure my digital dash. And I am specifying the same available COM port on both the USB to serial device driver and the MAXX software. I know the laptop knows there is something on the other end because the MAXX unit actually attemps to upload to the PC, but fails with the error message I mentioned (as opposed to the red bar extending while it searches for a connection).

                  Any ideas as to what might be going wrong?
                  sigpic

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                  • #10
                    I found an ancient laptop with a serial port, and was able to connect. Therefore, the problem was with the USB to serial adaptor. I think the issue is indeed related to USB running at +/- 5V as opposed the serial port outputing +/- 12V, and how the adaptor deals with that. The one I had was using the prolific chipset, and I ran the appropiate prolific drivers.

                    Also, correction on the exact wording of the error messsage I was getting: "Upload 256 timeout."
                    sigpic

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                    • #11
                      Originally posted by lucid View Post
                      I found an ancient laptop with a serial port, and was able to connect. Therefore, the problem was with the USB to serial adaptor. I think the issue is indeed related to USB running at +/- 5V as opposed the serial port outputing +/- 12V, and how the adaptor deals with that. The one I had was using the prolific chipset, and I ran the appropiate prolific drivers.

                      Also, correction on the exact wording of the error messsage I was getting: "Upload 256 timeout."
                      This is exactly what I am getting. I will go to a pawn shop tomorrow and get an old school laptop with serial port......

                      T

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                      • #12
                        It took me a couple of USB adapters before I found one that worked. I also had to toggle com ports within the maxx programs a number of times to get it working. I am currently running maxx in my windows 8 laptop, I turn on windows xp emulator (downloaded from microsofts website) and it all works pretty well.

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                        • #13
                          I really wish they would start selling these with usb cables. the serial port is so outdated.

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                          • #14
                            Originally posted by christsay View Post
                            Got my cable and it does have a different pinout than the commonly found ps/2 <-> DB9 cable and adapters out there. So don't lose your cable! It's pretty much straight through connections of pins 2, 3, 4, 5.

                            DB9 Female End:


                            Mini-DIN 6 aka ps/2:


                            Code:
                            DB9 PS/2
                            2 2
                            3 3
                            4 4
                            5 5


                            -chris
                            I need of a MAXX cable ASAP!! does anyone know where they get their cables or where I can get one?? Is there an off the shelf solution for this?

                            T

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                            • #15
                              This has come up a few times lately so I just confirmed the pinout on my Maxx cable.

                              The cable is a male Mini-DIN 6 straight through wired to a female DB9. The only terminals used by the cable are 2, 3, 4, 5.

                              If I were to make one I would buy a male Mini-DIN 6 cable, cut one end off, use a meter to check which wire went to which pin, and then connect a female DB9 connector to the cut end.

                              The wiring will connect straight through, like this:

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