RE: Useful Gadget of the Week: USB to 4 RS-232 Serial Ports

["Phil Harris" <phil@xxxxxxxxxxx>]

Never underestimate the ability of the human condition to find new and
previously unexplored ways of f*ck*ng things up. :-D

Phil

> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
> Of Paul Gale
> Sent: 04 August 2011 12:05
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Useful Gadget of the Week: USB to 4 RS-232
Serial
> Ports
>
> Lol - nothing is going to be that idiot proof then!!
>
> Paul.
>
>
>
> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
> Of jimf@xxxxxxx
> Sent: 04 August 2011 11:06
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Useful Gadget of the Week: USB to 4 RS-232
Serial
> Ports
>
>
>
> 	From the USB port have an extra "loop" of cable and have
this
> tied to the back of the PC.
>
> 	Although that didn't stop "someone" unplugging the serial
plugs
> from the serial hub. (screwed in d-type connectors).
>
> 	It also doesn't stop the store's electrician unplugging the
> serial plug from the opticla equipment, ("It wasn't plugged in
there
> before, mate, so i need to test it") and jamming his PAT tester
wire
> into the serial port and blowing the serial port drivers to
> smithereens.
> ("Must have been faulty mate")
>
> 	hohum..
>  Every little helps.
>
> 	-Jim
>  On Thu 04/08/11 10:57 AM , Paul Gale groups2@xxxxxxx sent:
> 	How have people found using USB devices in a production/mission
> critical environment? Particularly with regard to USB plugs being able
> to pull out easily, especially if there's a fair bit of hardware
> dangling off of it. Anyone had problems or is the use of cable ties
etc
> enough to prevent problems?
>  Paul.
>  -----Original Message-----
>  From: ukha_d@xxxxxxx [1] [mailto:ukha_d@xxxxxxx [2]]
> On Behalf Of Stuart Poulton
>  Sent: 04 August 2011 10:48
>  To: ukha_d@xxxxxxx [3]
>  Subject: Re: [ukha_d] Useful Gadget of the Week: USB to 4 RS-232
> Serial Ports  Phil,  You've hit the nail on the head, Keyspan use the
> FTDI chips iirc, which based on comments I've seen are far more
> dependable that others, and by virtue of having unique serial numbers
> do re-appear as the same device.
>  I have a requirement for USB to 4x serial ports presented as RJ45's ,
> which will involve the production of a PCB, and if there was interest
> then I could look at multiples.
>  Stuart
>  On 04/08/11 10:17, Phil Harris wrote:
>  >
>  >
>  > Whyzat?
>  >
>  > W.R.T. the original "Prolific chipset" issue raised I
have to say
> that  > the Prolific units I've had in the past have been OK for
non-
> critical  > use (programming C-Bus, HomeVision etc.) but - as I
think
> was the  > suggestion from the follow-up post - sometimes they
*CAN*
> disconnect  > and reconnect as a different COM port. If you're
using
> USB to serial  > adapters in a commercial (or, more importantly,
> medical or other  > mission critical environment) then I wouldn't
risk
> the consumer level  > USB to serial interfaces.
>  >
>  > For my own "critical" stuff (i.e. HomeGate interface
to RS232
> equipped  > kit) I have a couple of the KeySpan USB to four serial
port
> adapters.
>  > They're expensive and I don't know whether they are still made
but
>
>  > they've been absolutely bulletproof and have worked in scenarios
 >
> (programming up logic boards and running test kit at work) where other
> > USB to serial adapters have failed. They also come up repeatedly
as
> > the same serial port no matter which USB port on the machine they
> find  > themselves attached to.
>  >
>  > Cheers
>  >
>  > Phil
>  >
>  > -----Original Message-----
>  > From: ukha_d@xxxxxxx [4]
>  > [mailto:ukha_d@xxxxxxx [5] ] On  >
Behalf Of Stuart Poulton
> > Sent: 04 August 2011 09:37  > To: ukha_d@xxxxxxx [6]  >
> Subject: Re: [ukha_d] Useful Gadget of the Week: USB to 4 RS-232  >
> Serial Ports  >  > Out of interest, would USB to serial
convertors
> where the serial  > connection is an RJ45 socket be of interest to
> anyone ?
>  >
>  > Stuart
>  >
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