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  • Opus questions

    Originally posted by jollyeskimo View Post
    Basically this is how I connect a spare desktop power supply to my opus for testing standby/hibernation/startup while not hooked up to the car.

    Just make sure the power supply is up to the job, and that the power supply is turned on (green/PS_ON lead on ATX connector (pin 14) shorted to any black/ground).

    Close the switch to simulate an "ignition on" in the car, and open the switch to simulate an "ignition off" in the car, which will start the delayed shutdown/hibernate/standby.

    I have a few ?'s if you have a chance.. I purchased a OPUS 250W PSU (here is the PDF for the connectors) It has 3 BATT, 3 GND's, and 1 IGN..

    -Can I still use just one 4 pin Molex from my desktop PSU?
    -OR should I use two 4 pins from my desktop PSU? If two, then 2 toggle switches or will one suffice?
    -Is it necessary to put some sort of inline fuse between the 2 PSU's to prevent frying my OPUS or MB?

    TIA for you help..

  • #2
    Originally posted by Sonic V8 View Post
    I have a few ?'s if you have a chance.. I purchased a OPUS 250W PSU (here is the PDF for the connectors) It has 3 BATT, 3 GND's, and 1 IGN..

    -Can I still use just one 4 pin Molex from my desktop PSU?
    -OR should I use two 4 pins from my desktop PSU? If two, then 2 toggle switches or will one suffice?
    -Is it necessary to put some sort of inline fuse between the 2 PSU's to prevent frying my OPUS or MB?

    TIA for you help..

    I can't see why using a single molex would be a problem, as long as the wire gauge is sufficient and the power supply is up to the job. But if you find that you're having problems running it on one molex (it would probably have to be a pretty big load... exceeding the capacity of the +12v rail), then going with two or even three wouldn't be a bad idea.

    If using two connectors from the PSU, you would still use a single toggle switch for ignition, since that's a seperate +12V going to the IGN/ACC input of the OPUS. Remember, the +12v going to the +BATT is the juice from the battery (which is technically always on), and the +12v going to the IGN/ACC is coming from the ignition (which only supplies the voltage when the car is running).

    I don't see the need for an additional fuse between the PSU and the OPUS either, since the inputs are already protected with the onboard 25A blade fuse on the OPUS.

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    • #3
      Thanks for the advice. Got the PSU to start up the way I need it to, but having trouble configuring the shutdown sequence.. Something simple I'm sure..

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      • #4
        I moved this from the FAQ Emporium and closed the "How to Wire an Opus" thread so nobody will post anymore questions to it.

        Please pay attention to what subforum you're in before posting. The FAQ Emporiumis for INFORMATIONAL THREADS ONLY.
        Have you looked in the FAQ yet?
        How about the Wiki?



        Under normal circumstances, a signature would go here.

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