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Thread: DSATX won't power Amp without upgrade?!!

  1. #1
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    Angry DSATX won't power Amp without upgrade?!!

    Are you kidding me?!

    As expensive as this thing is, I cannot believe that after all the work it took to put it in, I can't even test the thing!!!

    The "aux amp turn on" only supports 100ma and requires a relay or some weird transistor setup.

    I returned an M2-ATX for this thing and even that cheaper unit could turn on my amp!

    I need help from someone out there, I'm lost when it comes to this relay thing and I don't see where I can buy the necessary accessory from the mp3car store.

    This is the last step to getting this thing finished (except for all the software gliches I'm sure I'll run into).

    PLEASE HELP!!!

  2. #2
    Variable Bitrate red_parchel's Avatar
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    hey xcompx
    http://www.r1200gs.info/howto/relay.html

    this write up does a good job of explaining the simple use's of a relay .. its not hard at all, and is a great help

    but something comes to mind .. if you're using the dsatx to turn on your amp, isnt it just tripping your remote wire switch ... the wire that normally comes from a headunit [typically a lil 22awg-ish blue wire] .. unless you have something different or that i havent seen b4 the "amp turn on" should wire to the "remote" spot on the amp .. the remote is a low current so that 100ma sounds right

    hope that helps
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  3. #3
    FLAC is for flaccid parksgm's Avatar
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    A relay is a good idea if you plan to turn on more than one piece of equipment with the power supply, so if you plan to expand your system in the future, then add one. It's a $5 part and 1 hour worth of work.

  4. #4
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    Here is the best way to wire the DSATX to power multiple amps, or amps that require a higher input voltage:
    (source: the12volt.com )
    Connecting Additional Devices to the Remote Turn On Wire
    Using a 30 amp SPDT relay, connect terminal #87 to constant 12 volts positive with a fuse rated to the sum of the additional accessories you've added and the components you need to turn on. (If you have two fans rated at 5 amps each and a neon light rated at 10 amps, you would use a 20 amp fuse plus 200 ma for each amplifier and processor.) Connect terminal #85 to ground, terminal #86 to the remote turn on wire from the head unit, and terminal #30 to each accessory with an appropriate fuse. A fuse (not shown) could also be used between the output of the relay (#30) and the remote turn on wire of the amplifiers and/or processors for extra precaution.

    Connecting Additional Devices to the Remote Turn On Wire Diagram
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  5. #5
    FLAC evandude's Avatar
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    Quote Originally Posted by XcompX View Post
    I'm lost when it comes to this relay thing and I don't see where I can buy the necessary accessory from the mp3car store.
    to add to the information others have already given, automotive relays are extremely common items that you should be able to buy from any auto parts store, or radio shack, etc... They look like this:


    The wiring diagram in the previous post is not quite correct, because the DSATX output pulls to ground when active, not +12v, so you would need to connect pin 85 to +12v instead of to ground. Otherwise, it's a 10 minute job, nothing but normal automotive wiring with crimp terminals.
    But don't take it from me! here's a quote from a real, live newbie:
    Quote Originally Posted by Viscouse
    I am learning buttloads just by searching on this forum. I've learned 2 big things so far: 1-it's been done before, and 2-if it hasn't, there is a way to do it.
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  6. #6
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    Quote Originally Posted by Eric99wj View Post
    Here is the best way to wire the DSATX to power multiple amps, or amps that require a higher input voltage:
    (source: the12volt.com )
    Connecting Additional Devices to the Remote Turn On Wire
    Using a 30 amp SPDT relay, connect terminal #87 to constant 12 volts positive with a fuse rated to the sum of the additional accessories you've added and the components you need to turn on. (If you have two fans rated at 5 amps each and a neon light rated at 10 amps, you would use a 20 amp fuse plus 200 ma for each amplifier and processor.) Connect terminal #85 to ground, terminal #86 to the remote turn on wire from the head unit, and terminal #30 to each accessory with an appropriate fuse. A fuse (not shown) could also be used between the output of the relay (#30) and the remote turn on wire of the amplifiers and/or processors for extra precaution.

    Connecting Additional Devices to the Remote Turn On Wire Diagram
    are you sure about that? The DSATX has an open collector output. That is it pulls to ground when engaged. Which are the coil connections?

    You need to connect one side of the relay coil to 12 volts, the other side to the output at location F.
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  7. #7
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    Quote Originally Posted by evandude View Post
    The wiring diagram in the previous post is not quite correct, because the DSATX output pulls to ground when active, not +12v, so you would need to connect pin 85 to +12v instead of to ground. Otherwise, it's a 10 minute job, nothing but normal automotive wiring with crimp terminals.
    Sorry, I forgot to mention that this would go before the DSATX using the ign switch line that your using to start up the DSATX. Then pin 30 would go to the DSATX and any amps that you have. So as long as the ign. is on, the amps are on as well as the DSATX.

  8. #8
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    Quote Originally Posted by Eric99wj View Post
    Sorry, I forgot to mention that this would go before the DSATX using the ign switch line that your using to start up the DSATX. Then pin 30 would go to the DSATX and any amps that you have. So as long as the ign. is on, the amps are on as well as the DSATX.
    HUH,

    Actually, he wants to turn on his amps with the DSATX amp turn on, and not his ignition. Since the DSATX pulls it's remote to ground, the way it connects is as follows,


    Pin 85-Constant (or Switched, though switched might cause amp pop noises) 12 volts
    Pin 86-The DSATX remote turn on lead
    Pin 30-Constant (or Switched, though switched might cause amp pop noises) 12 volts to trip your amps
    Pin 87-To your amps remote turn on lead.

    Simple, really. And, shouldn't take more then abouot 10 minutes to wire up.

    Michael
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  9. #9
    Banned GuessWhosBack's Avatar
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    dont use a 30amp automotive relay, on a line from a powersupply thats only supposed to give 100mA, the relays coil will need something like 150mA, which is more than the amplifier would use on its remote turn on line anyway.

    I dont see the problem here actually, the amplifier will probably use somewhere between 2 and 20mA on its remote line, and you apparently have 100mA?

    hmm.

    edit: actualyl, I really really dont understand the problem... why not just use the 12volt line from the powersupply for the remote turn on to the amp?

  10. #10
    Variable Bitrate kamikaze2112's Avatar
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    I used a transistor setup for my M2, as it wouldn't even close a relay. I think it was a PNP transistor (Available for a couple of bucks at any radio shack), and was wired as follows:

    Base - M2's remote lead
    Collector - 12v from the battery
    Emitter - Amp remote terminal

    Now, i'm not sure if that will work with the DSATX, but I'm sure that the electrical gurus here can tell you if it'll work like that or not.


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