FW400 to FW800 power

Discussion in 'Mac Accessories' started by cube, Apr 27, 2011.

  1. cube macrumors G5

    Joined:
    May 10, 2004
    #1
    Has anybody powered an FW800 drive from an FW400 port?

    Because the time I tried to power FW400 from FW800 it didn't work.
     
  2. Blipp macrumors 6502

    Joined:
    Mar 14, 2011
    #2
    FW400 doesn't carry any power so no it's not going to work.
     
  3. cube thread starter macrumors G5

    Joined:
    May 10, 2004
    #3
    Of course it does. That's why the ports can blow so that the FW800 connector was improved.

    I am not using one of those awful mini FW ports.
     
  4. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #4
    They do. That's why we had to send some DV decks back to Sony, as they were often kaputt due to the wrong order of connecting them to the computer.

    from http://en.wikipedia.org/wiki/IEEE_1394_interface#FireWire_400_.28IEEE_1394-1995.29
     
  5. cube thread starter macrumors G5

    Joined:
    May 10, 2004
    #5
  6. walterwhite macrumors 6502

    walterwhite

    Joined:
    Jan 22, 2011
    Location:
    South Central PA
    #6
    4 pin = 400 FW no power - used on DV video cameras
    6 pin = 400 FW with power - HD's, scanners, etc
    9 pin = 800 FW with power

    The great thing about firewire... no processor power is used, unlike USB that uses the processor.
     
  7. cube thread starter macrumors G5

    Joined:
    May 10, 2004
    #7
    We know that. The question is if it's possible to have power between 6 pin and 9 pin for each direction (cable issue?)
     
  8. Blipp macrumors 6502

    Joined:
    Mar 14, 2011
    #8
    I've always heard the 6pin variant referred to as FW600 while FW400 was reserved only for the mini 4pin which doesn't have power. I realize it may not be technically correct but it's always allowed easier differentiation between the two connectors.
     
  9. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #9
    I've always heard of the 4-pin being referred to as iLink on Sony devices or mini firewire everywhere else.

    I thought FW400 and 800 refer to the speed, so 600 makes no sense to me at all.
     
  10. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #10
    Me too, I never heard of FW600 for the 6-pin port.
    The 4-pin port is often referred to as DV-IN or DV-OUT too.
    [​IMG]
     
  11. cube thread starter macrumors G5

    Joined:
    May 10, 2004
    #11
    OK, I can power an FW400 drive from FW800. I think it was my FW400 repeater hub that couldn't be powered.

    I imagine an FW800 drive can be powered from FW400, too.
     

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