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Using your M2-atx computer power supply in a 24 volt marine / boat installation

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  • Using your M2-atx computer power supply in a 24 volt marine / boat installation

    I have a few questions about marine 24 volt systems. I thought the answers might be beneficial to others, so I will be posting both my questions and the answers here in this thread.

    • What is the spike /peak voltage that should be expected in a 24 volt marine or boat environment?
    • According to the spec sheet, clamping will occur at 25-27 volts. What is the exact failure behavior when input voltage exceeds 25-27 volts?
    • How long can the voltage exceed 25-27 volts before clamping occurs?
    • Is there more or less heat generated when operating in 24volts mode vs. 12 volts?
    • At what input voltage will permanent damage occur to the unit?

  • #2
    Originally posted by Fiberoptic View Post
    I have a few questions about marine 24 volt systems. I thought the answers might be beneficial to others, so I will be posting both my questions and the answers here in this thread.

    • What is the spike /peak voltage that should be expected in a 24 volt marine or boat environment?
    • According to the spec sheet, clamping will occur at 25-27 volts. What is the exact failure behavior when input voltage exceeds 25-27 volts?
    • How long can the voltage exceed 25-27 volts before clamping occurs?
    • Is there more or less heat generated when operating in 24volts mode vs. 12 volts?
    • At what input voltage will permanent damage occur to the unit?
    From the creator of the M2-atx:

    Originally posted by Andrei
    M2-ATX will work at 24V, but will not work with 24V b atteries (big difference, since 24V batteries are actually 28V)
    Try M2-ATX-HV, it can handle up to 32V (Actually will work up to 35V!)

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    • #3
      Trouble with boat pc

      I have been having trouble with the 5V rail shutting off when powering the pc on my boat. I am using one of the 12 volt leads on the power panel under the console. Should I be using a 24 Volt connection instead? The pc works sometimes and other times it won't boot. Thanks for any replies. Also, the battery draining circuitry seems to be specific for 12 V systems? How much will it drain a 24 V system before the circuitry will shut off?

      Marc

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