Martin Kuhnle wrote:
>Hello,
>
>we have made here in Germany a group buy more than a year ago. I have
>developed a custom hardware.
>It consists out of four boards.
>- quad 16-bit DAC board based on a BurrBrown DAC7744 chip
>- encoder input board with up to six differential encoder inputs
>- board with 12inputs ( limit switches ...)
>- board with 8 opto inputs and 8 relay outputs specially for servoamp
>control (enable, error input,..)
>
>
>
Gee, have you seen my PPMC board set? I've had this running with EMC since
2003. See http://jelinux.pico-systems.com/PPMC.html
It uses the DAC7644E, very similar.
It has 16 opto-isolated digital inputs, plus a 17th which is part of a
complete
hardware E-stop control.
it has sockets for 8 solid state relays.
The encoder board handles 4 axes, and can have a mix of differential and
single-ended inputs, as needed.
So, the set is 3 boards plus a motherboard that holds 8 boards of mixed
types
as needed. The motherboards are expandable, so you could run 16 or even
more
boards off one parallel port.
Jon
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