RB 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 impact while the module is being replaced. The module responds quickly and reliably collects input signals and issues output signals. With module-level diagnostics, quickly locate the problem module; rich variety of modules, including digital input and output, analog input and output, temperature acquisition, encoder modules, communication modules, etc., to meet the needs of customers with more programs.