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Thread: Carnetix CNX-P2140 185 watt Dual Output Regulator

  1. #1
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    Carnetix CNX-P2140 185 watt Dual Output Regulator

    This thread will serve to post all relative information for the Carnetix CNX-P2140 185 watt Dual Output Regulator.

    This thread is not to be used for troubleshooting, but rather for FAQ type responses.
    Jan Bennett
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    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  2. #2
    Variable Bitrate
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    Customer Question: I work in the robotics lab here at Stanford and have been using a few of your P1900 units on some of our robots to power PC''s from car batteries. They have worked flawlessly for over a year, so I''d like to
    stick with your products.

    I am building up a new robot that runs off a giant lithium battery pack. The pack discharges down to about 22 volts, and when sitting on the charger, the supply floats up to 36 volts. I would like to run a Mac Mini using one of your P2140 units. However, I saw that the upper voltage rating is 34 volts. Is there some margin in that rating, or is it a hard limit?

    Answer: I would definitely drop the voltage. If you run the P2140 in over-voltage conditions (more than 26V) for longer than a short moment will probably case the P2140 to cut power to prevent any damage or fires.

  3. #3
    Variable Bitrate
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    Typical diagram of the 2140..


  4. #4
    Variable Bitrate
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    Typical diagram showing how to use a standard automotive relay to feed all of your computer devices requiring 12V battery, 12V ignition, and ground.


  5. #5
    Constant Bitrate insaneramman's Avatar
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    Question Dell SX280?

    Is anyone using this unit to power a SX280 PSU says 12v @ 18 amps. I am quite sure (plz don't suggest a search been done) it doesn't draw that much. I would like to know if anyone has used this psu for this comp. Just FYI comp specs are - 2.8ghz, 1gb, SATA HD. Any help would and will be appreciated.

  6. #6
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    Since Infill G4 already has it's own psu, would CNX-P2140 still works for my Infill G4 to power 1 if not 2 x 4-port usb hubs (read it's better if usb syncronised) and wireless 3g router (12v?)? If it does but is overkill, I would not mind since I could reuse it if I ever switch to standalone car pc.

    Sorry, I've no background in electrical engineering and so would like minimum wiring solution though I've access to someone who can help me with the wiring if needed.

  7. #7
    Newbie
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    How is there 3 outputs. I thought the P2140 only had two outputs.
    I would love it to have 3. One 12V for my Monitor, a 12V for my PC and a 5V for my USB hub.
    Can you split the primary output 2 ways?

    And why, in the first diagram, is the PC connected to the input side of the P2140? The side with the USB is the input correct? Which should be connected to the battery.

  8. #8
    Maximum Bitrate pcpete's Avatar
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    Yes, this is exactly what I'm doing....


    The 12v for my pc motherboard goes into a picopsu

    The 'second' 12v goes into my xenarc....

    If you were powering a minipc like a mac mini...it can provide true 3 outpouts...ie 18v to pc...12v to lcd and 5v to usb

  9. #9
    Newbie jb3600's Avatar
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    Sending ACPI shutdown

    I can see in the psumoni software that that it sends ACPI shutdown but the pc does not receive it and just powers down the pc. I have lastest firmaware and software. I have set the soft jumper to all settings,hibernate, standby and laptop mode. any ideas?

  10. #10
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    http://www.carnetix.com/forum/showthread.php?t=1963

    Includes Microchip x64 USB drivers for Windows XP, Vista, and 7 64 bit versions.

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