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Thread: Max USB & PS2 cable length ?

  1. #1
    Super MURCer TransformX's Avatar
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    Question Max USB & PS2 cable length ?

    Does anyone know the maximum cable length possible for USB and PS2 devices before the signal is too degraded ?
    "For every action, there is an equal and opposite criticism."

  2. #2

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    Depends on the device/mobo you are using! I do not recomend usb cabel lengths over 5m!
    According to the latest official figures, 43% of all statistics are totally worthless...

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    Super MURCer Kurt's Avatar
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    For USB 2.0 I think it's 5m, then you need to use an active hub (ie with its own powersupply). You can link 5 of them.

    USB 1.0 cable are less shielded than the USB 2.0 ones, the max length should be about 3m before using a repeater (active usb hub). You can also link max 5 hubs.

    I'm not sure about the max length for PS/2, but it should be anywhere between 15 to 30m.

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    Moderator az's Avatar
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    It's a timing issue, not a signal degradation issue! I don't know whether a hub will do, there are repeaters out there though... for long lengths I bet there is something like USB over ethernet converters.

    AZ

  5. #5
    Super MURCer Marshmallowman's Avatar
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    I have a 5 metre usb cable, which I think is the max(without repeaters).

    It works by itself, but if I plug it into a powered usb 2 hub, it will sometimes have problems working reliably with my logitech rumblepad(usb 1).. eg 5 metres IS on the limit
    Last edited by Marshmallowman; 25th November 2004 at 17:27.

  6. #6
    Super MURCer Fat Tone's Avatar
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    I have two 7+ metre USB cables (one for a printer, one a scanner, both USB2.0) connected directly to USB2.0 ports on my motherboard without issue.

    I have a couple of USB to ethernet convertors laying around - Scan were giving them away with large orders at one point. I think they cost around £15.

    I friend is using a 1.5m extension for her PS/2 keyboard and is having intermittent problems.
    FT.

  7. #7
    Moderator az's Avatar
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    Oh, have a look here. Always trust Mr. Rutter to already know the answer

    AZ

  8. #8
    Moderator az's Avatar
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    here is a USB repeater with 5 m cable, in german, unfortunately. It is cheap (6.85 EUR), only does USB 1.1, and up to five can be used for a maximum length of 25 m.

    AZ

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