looking for arduino alternative

Hello guys first i hope im not making it hard for u to read it english isn't my native language i made a prototype project controlling some stepper motors via computer using arduino i used serial port for communication this project is for my studies and i wanna know if there some industrial alternative for this use that have an rj45 supports some communications protocole and have bunch of I/O . and thanks

You might be interested in the Industruino with the Industruino Ethernet Expansion Module: