The IP20 compact I/O modules consist of two series: wide form and book form, The FB20 series wide form digital I/O module adopts an integrated horizontal design, standard 35mm rail installation, 32 DI and DO combinations, compatible with multiple mainstream Ethernet bus protocols, and both I/O and equipotential power supply are plug and unplug terminal blocks; The FV20 series vertical IP20 digital I/O module adopts an integrated vertical design, saving installation space inside the cabinet. It has multiple input and output combinations of 32 DI and DO, compatible with multiple mainstream Ethernet bus protocols, and can be plugged and unplugged with terminal blocks