Need an I/O board. Where to look?

Question

Electronics

You need something like PIO-D168U.
That is a lot of discrete inputs/outputs, not necessarily 168 of course
. PCI or PCIe format
Drivers for linux are welcome.
But there is a nuance, all conclusions must be on the rear panel. There is no way to pull the wires out of the case.
I did not deal with this area at all, so no knowledge.

Answer 1

From the budget:
A board with a microcontroller (like Arduino) connected via USB.
Maybe a few.
Just what you need - they also release
www.expert-automatic.ru/news/pci-plata-p16por16u-o...
But the price, if you need about 168 pins, will be cosmic.

Answer 2

As an option icp-das.ru/catalog/pc-platy-vvoda-vyvoda/pci-platy...

Answer 3

If you don't need much, then