The IP20 compact I/O modules are divided into 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 o f32 DI and DO, compatible with multiple mainstream Ethernet bus protocols, and can be plugged and unplugged with terminal blocks