Things have changed a lot since then. One of the well-known names in industrial automation, Opto-22, now has adapters to connect their hardware to raspberry pi

Things have changed a lot since then. One of the well-known names in industrial automation, Opto-22, now has adapters to connect their hardware to raspberry pi. And they're not the only one. http://developer.opto22.com/pi/ http://developer.opto22.com/pi/