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

[jimf@xxxxxxxxxxxxxxxx]

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
>
> ------------------------------------
>
> Yahoo! Groups Links
>
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