I haven't been able to find a 691.2kbps PC interface card, like a PCI card. They only seem to support the 250k 500k 960k etc. To hook up the device im working with they want 2k$ for a 4 port 691.2k pci interface card.....
691.2kbps RS485 PC interface?
Nov 23, 2005
10 Replies
One reason could be is that 691.2kbps needs an uncommon baudrate frequency if you don't want a lot of data errors.
Or run it at a slower baud rate Maybe 500k may work if its adjustable at the client end
I wish, I swear they have deliberatly done this to make me buy their card... their product aint looking so good any more. Looks like ill have to make a
691.2 to 960 converter....
PCI
card.....
at
card...
This one's about US$100 - any good?
Cheers.
Ken
a
This time I'll include the link:
formatting link
They specifically mention 691.2k, so maybe it is a 'standard'....?
Cheers.
Ken
Thanks they look good, but where about do they specifically mention 691.2?? I can only see it says 50bps to 921.6, even in the data sheet :-(
Put it down to dyslexia. I'm a member of NAD, the National Dyslexics Association.
Cheers.
Ken
I have a quadtech pcmcia serial card on my notebook and it can run both
16550 and 17550 uart speeds up to about a meg per secondMaybe check out their 485 cards for an option
691.2??
formatting link
It has a feature for syncing with incoming data so if can match it may work , check out the data sheet on the above site . It looks like a nice card
If you get the 960K model if it can't handle the rate natively it can probably be modified by changing the crystal.
Bye. Jasen
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