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Thread: OPUS 320W Intelligent DC-DC PSU FAQ Thread

  1. #31
    Who am I? HiJackZX1's Avatar
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    If I am not mistaken, it does have the ATX12V connector also. I think I cut mine off because my MoBo didnt need it, or at least i think thats what I cut off. What you can do buy an add on adapter that connects from one of the Molex connectors to the ATX12V connector.

    PS: Thanx for bringing this up. i bought a new MoBo and didnt even think to check if it uses the ATX12V connector. Turns out it does so I am going to have to buy the Molex Adapter since mine is gone.

    Another thing you can do is email them, they are very fast to respond. http://opussolutions.com/index.php?p=support
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  2. #32
    Maximum Bitrate S4Per's Avatar
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    Cheers.
    Yeah, I love Opus..still have a 150DC power supply on the shelf that I bought from them in 2003, and still works flawlessly. Haven't kept up in this connector space, but I do see that those adapters are plentiful, so looks like no issue at all.
    Question: do you run standby? do you use the cut-off voltage? I'm a bit concerned about it, see what I'm trying to do here: ...I have a deep cycle battery and love the 'dead man timer' option on the Carnetix, but don't think what I propose in that thread is a good idea after all, and am looking to get the Opus 320 and rely on the low voltage shut off. Any experience?

    TIA,
    Per

  3. #33
    FLAC bosstone74's Avatar
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    it does have it, as I am wiring mine up now
    BossTone74

  4. #34
    Who am I? HiJackZX1's Avatar
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    Boss is right, infact the OPUS low voltage shut off works really really good. When i did my install I use to run it alot without the engine. Well sometimes I would come out, start the car, but the PC didnt come on. Turns out its the OPUS seeing that my battery doesnt have enough charge so it doesnt allow the PC to turn on.

    I plan to use Hybrid sleep found in Windows 7. This is ideally what CAR PC people should use. It allows us to use stand by with the added protection that if the power drops too low, the OPUS will send a signal to the PC to hibernate, then cut power. That means when you do boot back up, you can at least leave off where you were, with a short boot time. If the battery does hold a good enough charge you will be rewarded with instant on and no booting!
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  5. #35
    Maximum Bitrate S4Per's Avatar
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    Cool. Thanks guys... looks like I'll go with the Opus 320. And yup, hybrid sleep is where it's at! It works great.

  6. #36
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    One more question on wiring:

    I have 3amps worth of 12v devices (HD radio, Display and antenna) that I'm planning on hooking up to the 12v out on the PSU (I've had display wired straight to car, and results are better when hooked up to regulated power). So far, so good?

    Next, I have a USB DVD drive (2 amps) and a 7port hub (3amps) that I need to power...both are 5v. What's the best way to do it with this PSU? Just tap molex connectors? Or - I have 2 5v POL sitting around (Carnetix): should I wire them up, if so, how specifically (both to constant battery and also hook their 'turn on' wires to the 12v out)? I've thought about using the remote outputs for these, but looking at the manual, it would seem that power would be cut to htem prior to the PC being off.

    Thanks for the help!

    -Per

  7. #37
    Who am I? HiJackZX1's Avatar
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    Well I did my setup different because my CPU need alot of the power. What I did is used a relay connected to the 12V rail on the PSU. When the PC turns on, it trips the relay sending unregulated power to the devices. The screens have regulator eggs, so that was no issue. The HD radio doesnt need regulated power, it is made to run on unregulated. So I have the HD Radio's constant line connected to constant 12V power, then the ignition line is connected to the relay so when the PC turns on, the HD Radio powers up. By doing this, the rail is not being used at all as far as amps. All my hubs and most other devices are powered by 3 additional PSU units. My install is massive so I had to go that route. You wont need to do that. Before I decided to go big, I tried to run USB devices from the 5V rail and it didnt seem to work for me. The PSU wouldnt come on. I think mine was defective though. Since I now power all my 5V devices via seperate PSUs, it didnt matter. Also the OPUS 320 controls the rear PSUs, thats also via relays.

    If you have the 5v POL sitting around, then you would connect to ground to ground, 12V constant to a constant 12V source, then the ignition line to the 12V rail of the OPUS 320. That way the OPUS turns them on and off, making everything work together.
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  8. #38
    FLAC bosstone74's Avatar
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    Quote Originally Posted by ZX1Cruizer View Post
    Boss is right, infact the OPUS low voltage shut off works really really good. When i did my install I use to run it alot without the engine. Well sometimes I would come out, start the car, but the PC didnt come on. Turns out its the OPUS seeing that my battery doesnt have enough charge so it doesnt allow the PC to turn on.

    I plan to use Hybrid sleep found in Windows 7. This is ideally what CAR PC people should use. It allows us to use stand by with the added protection that if the power drops too low, the OPUS will send a signal to the PC to hibernate, then cut power. That means when you do boot back up, you can at least leave off where you were, with a short boot time. If the battery does hold a good enough charge you will be rewarded with instant on and no booting!

    When it fails to turn your PC on due to low voltage when you start your car, do you just rev-up the engine and then it kicks on??
    BossTone74

  9. #39
    Who am I? HiJackZX1's Avatar
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    Quote Originally Posted by bosstone74 View Post
    When it fails to turn your PC on due to low voltage when you start your car, do you just rev-up the engine and then it kicks on??
    How did you know, lol? Yea I have to buy a bigger alternator and add 2 deep cell batteries. Right now I am using a standard battery with the stock alternator.
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  10. #40
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    EDIT: The below is wrong, as was clarified by Kris after further communications. The external 12v output is limited to 3.5A

    Just FYI: as per email from Opus today, the 12v output operates off of one regulator, which means the total 15A draw for the 12v line on the 360w PSU can be split however you want it between the motherboard power connector and the additional 12v regulated output (orange wire) as long as it doesn't exceed 15 amps.

    I might power one 5v POL off of the regulated 12v knowing this, just because it's easy for me from a wiring perspective (connect both constant and on/off of the 5v to the regulated 12v output), then again, I might not ;-).

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