Need ARM with 485, digital counters and analog I/O

I am looking for a new embedded computer that has an ARM processor or equivalent, 64MB of Flash, 128MB ram, two 485 ports, at least 2 digital counters, at least 8 analog 4-20ma connections and support for micro SD card.

I have played with the TS7200 - nice but a bit small with only one 485 port. I have also tried the TS7800 - nice, but have had many crash in the field.

A stable version of the TS7800 would be great - any leads?

Thanks!

Reply to
tmunro
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I would use the best system that fits your needs, without RS485, but two UARTs and then use something like two ST3485 for the RS485 ports, or ADM2483, if you need galvanic isolation. Looks like the TS-7200 has some headers, where you can easily plug a simple extension board for RS485.

Or you could just buy RS232 to RS485 external converters.

BTW: why do you need 2 RS485 ports? Usually RS485 is used with some protocol on a single bus for all devices, where one device is the master and all other devices are addressed with a unique address.

--
Frank Buss, fb@frank-buss.de
http://www.frank-buss.de, http://www.it4-systems.de
Reply to
Frank Buss

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