Need replacement power adapter for WRT54G

Discussion in 'Cisco/Linksys Wireless Routers' started by Robocub, May 23, 2006.

  1. Robocub

    Robocub LI Guru Member

    I've looked through the forums but can't find the info I need. Can anyone provide me with the specs on the power adapter for the WRT54G since I might have an alternate adapter that would work with this router, or direct me to where I can buy a replacement one.
  2. the_sly_dog

    the_sly_dog Network Guru Member

    hi robocub :thumb:

    what version wrt54g ??

    version 1 - 5V 2.0A
    version 1.1 - 12V DC 1.0A
    version 2 -12V DC 1.0A
    version 2.2 - 12V DC 1.0A
    version 3 - 12V DC 1.0A
    version 3.1 - 12V DC 1.0A
    version 4 - 12V DC 1.0A
    version 5 - 12V DC 1.0A

    hope this helps :drinking: :drinking:
  3. Robocub

    Robocub LI Guru Member

    it's for version 2.2 but thanks for all the info :clap:
  4. the_sly_dog

    the_sly_dog Network Guru Member

    your welcome

    hope your other power supply works with it
  5. vincentfox

    vincentfox Network Guru Member

    Anything other than the original Gv1 unit is very flexible with regards to power.

    The main thing to look for is the M-size connector that fits.

    Beyond that "about" 12V

    At least enough amperage to equal the factory-wart which is 1000 mA which euals 1A.

    The WRT 12V versions will work fine even with lower voltages, as long as there's enough current. Many people like me power them using Power-over-Ethernet over quite long runs where the voltage might drop as low as 7V. Modern units like the GL are much less hungry, you could get by with half the amperage, but an older v2 unit like yours I suspect does need that 1A.

    I've bought generic adapters at Radio-Shack stores before, with the M-sized tip and they worked fine.
  6. RonWessels

    RonWessels Network Guru Member

    If your power over Ethernet has dropped to 7V, you either have something that calls itself "power over Ethernet" but does not conform to the IEEE 802.3af power over Ethernet standard, or you have a broken Ethernet cable, or you have a broken power extractor at the client end.

    IEEE 802.3af which defines the power over Ethernet standard specifies that the injected voltage is 48 VDC. The required voltage at the client end is generated using a DC/DC conversion of the extracted voltage from the Ethernet cable. For there to be only 7V available to the client indicates that there is something seriously wrong with your setup.

    See this Wikipedia entry for more details.
  7. mingkee

    mingkee Network Guru Member

    check it out
    ratshak 15V 1A international adaptor works well (at least I'm using one with 54GL, because the one supplied cannot be used here, it's 120V, and the local voltage is 240V)
  8. vincentfox

    vincentfox Network Guru Member

    I was not stating my rigs drop as far as 7V, they do not.

    I intended to document that the WRT at least in 12V incarnations are very tolerant about voltage range, as long as there is sufficient current. Do not for example plug in a 9V 200 mA wart like a friend did and expect it to work. I was trying to debug problems on that one over the phone for about an hour before I thought maybe the dude had grabbed a wart that said Linksys and assumed they were all the same. A wart for a cheapo Linksys switch doesn't have the juice.

    I usually hack up NYC-style PoE and if you want to be pedantic buddy and say it's not REAL PoE go right ahead. I also refer to a copier sometimes as a Xerox-machine and tissue as Kleenex which drives some people nuts.

    I expect though my hacks are not dropping much voltage since I think my longest couldn't be more than 50 feet, probably 10-11V.
  9. RonWessels

    RonWessels Network Guru Member

    All I wanted to point out was that IEEE 802.3af power over Ethernet powering a 12V device does not send 12V over the Ethernet wire. Regardless of the client voltage, 48 VDC is sent over the Ethernet cable.

    If you want to use non-Kleenex kleenex to clean your non-Xerox Xerox machine, go right ahead.
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