[Nut-upsuser] MGE Ellipse USB cable config ?
aquette.dev at gmail.com
Mon Oct 15 09:01:43 UTC 2007
2007/10/15, Arjen de Korte <nut+devel at de-korte.org>:
> Arnaud Quette wrote:
> >> So the questions are:
> >> 1: is the USB cable simply like the RS232 cable but with built-in USB
> >> converter ?
> >> 2: or is the com-port some sort of "autodetecting" system that can
> >> work in both a USB and a RS232 config ? In that case, would anyone
> >> know the USB pin layout of the socket on this thing ?
> >> 3: has anyone else used this or a similar MGE system on the mac?
> >> 4: Does anyone know a cheap address for one of these USB cables in
> >> the Netherlands, or at least Europe?
> > the newer models you're talking about are the USBS models, which allow
> > to switch between USB or serial by just changing the cable. If you own
> > such a model, you should have an RJ12 connector on the UPS side, and 2
> > cables, one ending with a DB9 (for serial use) and another with a
> > standard USB connector.
> The OP doesn't have the USB cable, that's why he came here in the first
yup, Dominique Lallement just made the same remark.
It seems that I've read that thread too quickly
> > Otherwise, the keyspan solution mentioned by my fellows are just fine
> > and have been validated.
> Using the serial port has a slight disadvantage over the USB port. The
> SHUT protocol takes (especially during startup) a fair amount of time
> because a lot of data has to be sent over a slow link. On my Evolution
> 650, it takes almost 10 seconds just to transfer the report descriptor.
> After that, the differences are small however, so operationally this
> should not be a problem.
yup. The problem is that depending on the exact model (USBS or not),
switching to USB implies also a different card...
> > I hope this answers your question,
> I think the OP would still like to know if it is possible to either buy
> or make such a cable (questions 2 and 4).
I will so make a full answer to the various questions:
> 1: is the USB cable simply like the RS232 cable but with built-in USB
> converter ?
> 2: or is the com-port some sort of "autodetecting" system that can
> work in both a USB and a RS232 config ? In that case, would anyone
> know the USB pin layout of the socket on this thing ?
on USBS models, we are simply using different wires on the RJ12 (UPS
side) to cable the right communication (USB or serial).
Older models had 2 distinct cards.
> 3: has anyone else used this or a similar MGE system on the mac?
I know of several people that use USB or serial MGE units with keyspan on Mac.
> 4: Does anyone know a cheap address for one of these USB cables in
> the Netherlands, or at least Europe?
Dominique will check to send with you the appropriate solution.
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