Flexible I/O Expansion with X Series Modules The ARMxy X Series offers a total of 18 different I/O expansion boards, giving users extensive flexibility to match various application requirements. Supported signal types include: RS232, RS485, CAN, Digital Input (DI), Digital Output (DO), and General Purpose I/O (GPIO). Whether you need industrial communication interfaces or digital control signals, the X Series provides a reliable and scalable I/O solution for your embedded system.