Jesse Off wrote:
>
>
> Yes, but those cables are very unique and typically very expensive.
> Since DB9's are by far the most common connector for serial ports,
> the board would be useless without including that cable which would
> add cost to everybody's end product. I don't know how much the cable
> below costs, but somebody else's octopus cable costed $88 when we
> looked at it!
Unless I miss something here you'd still need to create custom
cables to break out potentially three async ports contained in your
custom DB9 pinout to multiple standard DB9 serial ports.
Other potential solutions which seem more OTS (read: cheap) would
be multiple RJ11 connectors, one for each async port. These are
about the cheapest external connector available and RJ11 to DB9
adapters do exist though most commonly as tool-free u-wire-it kits.
RJ45 connectors are perhaps a second choice from a OTS perspective
and while a bit of overkill in terms of pin count they are
available in banked/stacked modules which would offset the added
footprint multiple discrete units would bring into play. RJ45 to
DB9 adapters are even more ubiquitous.
Probably hands down the cheapest solution is the ancient PC 2x5 10
pin async header. Though bringing these out externally has mechanical
issues the "as shipped" cost should be fairly low and the header to
DP9 adapter cables are common.
> Those cables are also not something we'd have confidence in having a
> consistant supplier for many years to come. Granted, we could have a
> cable manufacturer manufacture them for us, but cable manufacturing
> is very labor intensive and tends to be expensive. Yet one more
> reason would be the extra cabling mess you'd have if you only needed
> a few of the COM ports.
>
> TS usually trys to consider total system cost a little more than your
> typical SBC company. We've seen some really neat boards in the
> industry that start out reasonably priced until you start adding up
> all the extra cabling required. We try hard to not do that. More
> cables == more mating rather than soldered wires == more complexity
> == lower reliability.
>
> //Jesse Off
>
> --- In <ts-7000%40yahoogroups.com>,
> Curtis Monroe <> wrote:
> >
> > Did TS consider using an "octopus cable"?
> >
> > http://www.visionsystems.de/produkte/705.html
> <http://www.visionsystems.de/produkte/705.html>
> >
> > -Curtis.
> >
> >
> > On December 1, 2006 06:37 pm, Jesse Off wrote:
> > > We've just designed a TS-7300 FPGA load with 34 RS232 serial
> ports.
> > > We were only able to bring out 25 in the enclosure pictured
> below.
> > > There is up to three serial ports in each of the 8 DB9's at the
> top of
> > > the enclosure.
> > >
> > > http://www.embeddedarm.com/~joff/34comm-stcllw.jpg
> <http://www.embeddedarm.com/~joff/34comm-stcllw.jpg>
> > >
> > > Ridiculous huh? :-)
> > >
> > > //Jesse Off
> > >
> > >
> >
>
>
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