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Joerg
Guest
Wed Feb 01, 2012 1:43 am
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
--
Regards, Joerg
http://www.analogconsultants.com/
Joerg
Guest
Wed Feb 01, 2012 2:06 am
Joerg wrote:
Quote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
Something like this but for inside a PC would be nice:
http://www.moxa.com/product/UPort_204_207.htm
--
Regards, Joerg
http://www.analogconsultants.com/
langwadt@fonz.dk
Guest
Wed Feb 01, 2012 3:23 am
On 1 Feb., 01:43, Joerg <inva...@invalid.invalid> wrote:
Quote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
--
Regards, Joerg
http://www.analogconsultants.com/
something like this?
http://accesio.com/go.cgi?p=../usb/usb-104-hub.html
hard to see on the picture if theres any common mode chokes, but
there's
plenty of space for it
-Lasse
Martin Riddle
Guest
Wed Feb 01, 2012 3:42 am
"Joerg" <invalid_at_invalid.invalid> wrote in message
news:9org4vF98lU1_at_mid.individual.net...
Quote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so
much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
--
Regards, Joerg
http://www.analogconsultants.com/
just hubs
Cheers
Pieyed Piper
Guest
Wed Feb 01, 2012 4:19 am
On Tue, 31 Jan 2012 21:42:18 -0500, "Martin Riddle"
<martin_rid_at_verizon.net> wrote:
Quote:
"Joerg" <invalid_at_invalid.invalid> wrote in message
news:9org4vF98lU1_at_mid.individual.net...
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so
much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
--
Regards, Joerg
http://www.analogconsultants.com/
http://www.sealevel.com/
just hubs
Cheers
There is no such thing as a "ruggedized" PC Card.
Thing IN cases get ruggedized. Bare PCBs that get plugged into
interface connectors DO NOT!
All he needs to do is buy a CHEAP HUB, and put it in a box.
If what he is doing is tearing up connector, he needs to BE MORE
CAREFULL with the fucking things!
An alternative would be to place short USB jumpers on each hub port,
and then use the jumpers to connect through. If the jumper fails, all you
need to replace is the jumper.
This also works INSIDE a PC case, if you wire the ports up to a 4 port
slot door. Asus sells those.
miso
Guest
Wed Feb 01, 2012 6:13 am
On 1/31/2012 4:43 PM, Joerg wrote:
Quote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
The USB3 card I got at Fry's has a power supply connector pin. How much
more connected could you get? Unfortunately their server isn't answering.
I would do a search for a card that met the following:
1) whatever bus you want
2) NEC (NEC has the best usb chips)
3) Molex (that insures it has a power supply connector)
My recollection is the card Fry's sold was a Syba. I tossed the box long
ago. However the damn company sold two version of the card with
identical part numbers. One was buggy. The one that worked had the NEC
chip and the large molex connector. Fortunately I had a smartphone with
me and google the card before buying it, and was able to get the right
version.
Sum Ting Wong
Guest
Wed Feb 01, 2012 10:15 am
On Tue, 31 Jan 2012 17:06:58 -0800, Joerg <invalid_at_invalid.invalid>
wrote:
Quote:
Something like this but for inside a PC would be nice:
So, put it inside your PC. Get a slot door with four USB ports on it.
http://www.meritline.com/4-port-usb-a-female-slot-plate-adapter---p-62879.aspx?source=fghdac
Then replace that floppy, or floppy bay with one of these:
http://usa.asus.com/Motherboards/Accessories/Front_Panel_USB_30_Box/
Joerg
Guest
Wed Feb 01, 2012 5:08 pm
Sum Ting Wong wrote:
Quote:
I have found that most of those are not properly grounded at the
connectors. IOW the shield makes no contact to the metal. Then you get
ESD and EMI issues (which is why I am looking).
In fact, we were able to make a card work but the rework is rather onerous.
--
Regards, Joerg
http://www.analogconsultants.com/
Joerg
Guest
Wed Feb 01, 2012 5:12 pm
langwadt_at_fonz.dk wrote:
Quote:
On 1 Feb., 01:43, Joerg <inva...@invalid.invalid> wrote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
--
Regards, Joerg
http://www.analogconsultants.com/
something like this?
http://accesio.com/go.cgi?p=../usb/usb-104-hub.html
hard to see on the picture if theres any common mode chokes, but
there's
plenty of space for it
Looks like they've got only low-capacitance TVS'es on there but hard to see.
Essentially this is like the Moxa box. Which is ok (and on order now)
but ideally we'd like a PC card. Avoids having to mount yet another box
into the system. And often those boxes are missing convenient mounting
flanges so you end up reworking their box.
--
Regards, Joerg
http://www.analogconsultants.com/
Joerg
Guest
Wed Feb 01, 2012 5:13 pm
Martin Riddle wrote:
Quote:
"Joerg" <invalid_at_invalid.invalid> wrote in message
news:9org4vF98lU1_at_mid.individual.net...
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so
much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
--
Regards, Joerg
http://www.analogconsultants.com/
http://www.sealevel.com/
just hubs
Yes, like the Moxa box, but these look a lot more expensive :-)
--
Regards, Joerg
http://www.analogconsultants.com/
Joerg
Guest
Wed Feb 01, 2012 5:20 pm
miso wrote:
Quote:
On 1/31/2012 4:43 PM, Joerg wrote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
The USB3 card I got at Fry's has a power supply connector pin. How much
more connected could you get? Unfortunately their server isn't answering.
I would do a search for a card that met the following:
1) whatever bus you want
2) NEC (NEC has the best usb chips)
3) Molex (that insures it has a power supply connector)
My recollection is the card Fry's sold was a Syba. I tossed the box long
ago. However the damn company sold two version of the card with
identical part numbers. One was buggy. The one that worked had the NEC
chip and the large molex connector. Fortunately I had a smartphone with
me and google the card before buying it, and was able to get the right
version.
That one I don't understand. What for would I need a power supply
connector? All we need is four USB connections for communication
purposes, not to power anything.
So far all my searches yielded PC cards that had rather inferior
grounding at the USB connectors and all were missing common mode chokes
in the USB data lines. Those CM chokes plus proper grounding right into
the chassis are rather important when it comes to susceptibility and
ESD. Which is why custom designs always pass and COTS stuff nearly
always fails when doing 8kV contact and things like that. If I could
custom-design a PC card we'd be done, but time won't allow that on this
project.
--
Regards, Joerg
http://www.analogconsultants.com/
langwadt@fonz.dk
Guest
Wed Feb 01, 2012 8:50 pm
On 1 Feb., 17:08, Joerg <inva...@invalid.invalid> wrote:
Quote:
somthing like this for the internal usb?
http://intrl.startech.com/Cables/USB-2.0/Internal-and-Panel-Mount/4-Port-USB-20-Connector-Backplate~USBPLATE4
-Lasse
Joerg
Guest
Wed Feb 01, 2012 9:33 pm
langwadt_at_fonz.dk wrote:
Quote:
We have something like that. But:
a. No CM chokes. The only way to correct that is to find a ferrite bead
of enough Al value but not so much as to mess up the end-of-packet
signal, and then somehow roach those on there. Can be done but ugly
rework. Now if anywone knows something like this with ferrites already
on there I am all ears :-)
b. The L-bracket typically has no reliable connection to the individual
USB shields and it also has no gasket to make sure it connects to the PC
chassis all around.
--
Regards, Joerg
http://www.analogconsultants.com/
Nico Coesel
Guest
Wed Feb 01, 2012 10:22 pm
Joerg <invalid_at_invalid.invalid> wrote:
Quote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
How many do you need? It shouldn't be very hard to design a board.
--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
nico_at_nctdevpuntnl (punt=.)
--------------------------------------------------------------
Joerg
Guest
Wed Feb 01, 2012 10:25 pm
Nico Coesel wrote:
Quote:
Joerg <invalid_at_invalid.invalid> wrote:
Hi Guys,
Does anyone know of a super-rugged USB card with four or more USB
downstream slots? PCI-e or PCI would be nice. External hub not so much,
but would be ok if nothing else is available.
Main drawbacks of literally every card I've seen: USB tied into board
but not into the PC chassis. No common mode chokes. Both of this is
causing ESD failures galore.
Price is not too important as long as it's under $200 or so. I know
there are mil-spec hubs north of $500 but that's too steep.
How many do you need? It shouldn't be very hard to design a board.
Sure, but that's what we wanted to avoid :-)
We cannot possibly be the only ones who need level 4 ESD performance
without resorting to external boxes.
--
Regards, Joerg
http://www.analogconsultants.com/
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