The CP Series blade module uses a new generation of distributed I / O systems and consists of a coupling module and an extended I / O module. The coupling can select the corresponding bus module according to the communication interface of the controller system, supporting mainstream industrial communication protocols, and extending the I / O module provides digital amount, analog amount, temperature amount, special modules, and so on. The coupling module and the extended I / O module can be freely combined according to the field requirements, and the CP series blade module can achieve lower cost requirements in the case of more locations.