HB series ultra-thin I/O is a new generation of three-segment card-type modules, supporting mainstream fieldbus protocols, such as PROFINET, EtherCAT, EtherNet/IP and so on. The single piece module is as thin as 12mm, saving space in the electrical cabinet; the three-segment structure design, the terminals can be removed, the module supports hot-swapping, convenient for on-site maintenance and replacement, and the system operates normally without any influence while the module is being replaced.