Schaublin 125-CNC retrofit.

No eBay APP ID and/or Cert ID defined in Kunena configurationThanks Andy, I suspected that would be the case. Luckily the multipol interface module for the CPV10 seems common enough.



The pinout is well documented in the festo manual:
 
Mark

Maybe this helps:
github.com/mbuesch/pyprofibus/blob/master/doc/hardware.rst

Using the Linux serial port is a supported way to connect pyprofibus to a Profibus network. On some boards it may only supports low baud rates of up to about 19200 baud. However that depends on the actual serial transceiver hardware. On certain embedded boards with flexible serial hardware, high baudrates such as 1.5 MBaud may also be possible.To run pyprofibus on serial port configure pyprofibus as follows:[PHY]
type=serial
dev=/dev/ttyS0
baud=19200

Yes, when I said that it wasn't likely to be trivial with a Mesa card I was imagining that it was implicit that the alternative was a USB to serial converter.

What is the Profibus physical layer?

If I remember correctly Profibus cables contain 2 single core wires, one green one red.

But really I don't know much about it. It just seems that there is a fair amount of used components around and a component for LinuxCNC seems useful.

[edit]
According to this www.profibus.com/index.php?eID=dumpFile&...07c7b3da955b47a8e10d one can use RS485 transmission technology.

More info here:
www.felser.ch/profibus-manual/elektrische_pegel.html

In that case I recommend:
www.amazon.de/DSD-TECH-SH-U13-Krokodilkl...atibel/dp/B082KKG55T
(With the croc clips cut off)
I am using that to control a Modbus VFD.

Before I run too far down that rabbit hole of working out how to interface a serial port with LinuxCNC and then set up the coms with the Fieldbus port of the valve terminal, and work out how to command the individual valves,  I gave a cheeky offer on a second valve terminal with the multipol interface yesterday, and the guy accepted it. Once the two valve terminals arrive, I'll play with my new lego set, and intend to mount all the unneeded parts back together and flick one back off to ebay.

In practice, I will put it on my "maybe i'll need this in the future" shelf, for permanent archiving.