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Thread: How to make a J2 USB/DB9 Connector for an XTL2500/5000 radio

  1. #1
    MotoMike No Longer Registered

    Default How to make a J2 USB/DB9 Connector for an XTL2500/5000 radio

    Hello,

    I've never seen a complete diagram pinout on how to connect a J2 to USB/DB9 connector anywhere in the posts on this forum. There have been some diagrams which i've used below, but there's still a couple of question marks that I need answered. I'm currently in the process of making a homemade J2 USB/DB9 combo connector to hookup to my compy. I believe I'm pretty close to decyphering the pinout diagram but I need someone to confirm the pinouts are correct, and also fill in some of the blanks for the DB9 connector.

    I'm working off a diagram that was posted in another area by another member. Below is the J2 connector pinouts. If the wording is too small, you can see them in the table at the end of this post.
    J2 Connector.jpg
    Below is the DB9 connector Pinouts
    db9.jpg
    And Below is the USB connector pinouts. If it's hard to read the below, basically Red is +VCC 5V, White is Data +, Green is Data -, and Black is Ground.
    usb1.jpg

    Below is the table I made which I think are the correct connections for connecting the J2 to the computer.
    I'm not sure if all the DB9 pins are used, but I couldn't determine where DB9 pins 1(Data Carrier Detect), 4(Data Terminal Ready), 6(Data Set Ready), 9(Ring Indicator) are connected to.
    J2 Pins USB Pins DB9 Pins
    1 - Ground 4 – Ground 5 – Signal Ground
    2 - BUS+
    3 - BUS-
    4 – DCE_TXD 3 – Transmit Data
    5 – DCE_RXD 2 – Receive Data
    6 – USB- 3 – Data -
    7 – USB+ 2 – Data +
    8 - Reset
    9 - Busy
    10 – DCE_RTS 7 – Request to Send
    11 – DCE_CTS 8 – Clear to Send
    12 – USB_Power 1 – VCC +5V
    13 - Chan_Act
    14 - Ground
    15 - Emergency
    16 - Aux PTT
    17 - One Wire
    18 - VIP Out 1
    19 - VIP Out 2
    20 - Spkr+
    21 - RX_FILT_AUDIO
    22 - Monitor
    23 - AUX MIC
    24 - SW_B+
    25 - Ignition
    26 - Spkr-


    Any help is appreciated.
    Thanks in advance to everyone for their input.


    EDIT by mod - Post #14 contains a useful attachment that describes all the required pinouts for the various ASTRO25 programming connectors --> http://communications.support/thread...5999#post35999
    Last edited by MattSR; Nov 23, 2014 at 07:36 PM. Reason: Added link to pinouts and made sticke


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  3. #2
    tim No Longer Registered

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    Hi Mike,

    Two weeks ago I made a USB to the 26pin connector so I could program my XTL5000 consolette.

    Did it just like you did, and worked great.

    Can't comment on the DB-9 stuff tho.

    Tim

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    If you can wait until Monday, I will pull my DB9 cable from the bench and tone it out with the Fluke.
    Apparently NOT a radio professional.

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    Here's what I used. Works fine for me.

    26 pin connector db9 connector
    pin 1 pin 5 gnd
    pin 4 pin 2 tx
    pin 5 pin 3 rx
    pin 10 pin 8 cts
    pin 11 pin 7 rts
    pin 25 ignition

    rayray

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    Where do you guys source the extra pins for the trapezoidal 26 pin connector?

    I have two connectors that I want to add the programming connections to, but I'm not sure what to use for the pins...

    Cheers
    Matt

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    Astro Spectra's Avatar
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    @MattSR, the Motorola install kit comes with spare pins otherwise use a standard DB style crimp pin like this: http://www.tessco.com/products/displ....do?sku=484307 or solder style like this http://au.element14.com/te-connectiv...way/dp/2310163
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  9. #7
    MotoMike No Longer Registered

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    If you're in the Toronto/Markham Ontario area, you can try Sayal or Electrosonic. When i'm in the U.S. I usually check out the local Fry's or Radio Shack (if they're still around)..

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    Yeah, these bits and pieces are a bit harder to find down under...

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    @MattSR, my second link was an Oz supplier...
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    Yeah bnut I'm not paying $30 for a single connector just to salvage a few pins from it..

    I found an eBay seller than had them at a good price, and I'm prepared to wait

    Cheers,
    Matt

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    You can order spare connector and ignition/speaker wire assy's as a separate unit, and they come with extra pins for some DIY'ing. I designed and built up a comm system for a tactical comm-center type RV, and we ordered a bunch of them to pre-make harnesses within the walls of the RV. Unfortunately I don't have a part number for the kit but I remember we got about 20-30 of them for the job. I still have one or two laying around somewhere.

    What AS said is true, they are normal DB-25 style crimp pins, so any extracted pin from an old DB-9 or 25 should work.

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    Motorola Part number/s for 26 pin rear XTL/APX Accy connector.

    The D-SUB Male Connector WITHOUT pins= 2885379F02
    Pack of 5 pins for the Connector= 3980034F01

    Not sure what the part number for the Black D-sub cover(Shell) is though. I do know they can be little bastards to get back together once wires/cables are installed.

    Also if building a USB or RS programing cable, might want to include the emergency 15 jumper to ground, also if dash mount and depending on programming of ign. sense, may want to include ign. sense 25 wire too.

    Always unhook main power and then disconnect accy connector if using emergency on dash mount. And reverse that order when reinstalling the radio, LOL.
    Last edited by moetorola; Nov 18, 2013 at 03:50 PM.
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  15. #13
    MotoMike No Longer Registered

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    hi com.. did you have a chance to tone it out ? I think i've got it with the other posts here, but it's always nice if someone had an actual cable to test just in case there's anything missing.

    Thanks!

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    I can confirm the RS232 connections, my first XTL cable was home brew '232 before I went GACI SUB. See this table from Batboard user Twisted Pear back in 2008:

    http://home.comcast.net/~tr1car1/AST...rog_Cables.pdf
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    Quote Originally Posted by MotoMike View Post
    hi com.. did you have a chance to tone it out ? I think i've got it with the other posts here, but it's always nice if someone had an actual cable to test just in case there's anything missing.

    Thanks!
    Mine matches what is posted here. I too wish I could find the GCAI connectors bare someplace. I now have three damaged cables underneath the molded GCAI end where the wires appear to have gone intermittent.
    Apparently NOT a radio professional.