Products by Form FactorUIO40-ExpressUIO40-ExpressUIO40-Express UIO40-Express Modular I/O expansion boards for Advantech 2.5" Pico-ITX single board computers to quicken application deployments. UIO-40301 x RS-485, 1 x RS-232, 4 DIs & 4 DOs UIO-40321x GbE, 2 x USB2.0, 2 x RS-232 UIO-40341 x CAN bus, 2 x RS-232 UIO-40364 x GbE UIO-40384 x GbE (3 x LAN, 1 x WAN) UIO-4040128GB - 1TB NVMe SSD