Io-link I/O slave module hub is suitable for use in severe industrial environment. I/O slave module is connected to IO-Link main gateway through M12 interface for communication control, and related equipment is controlled through M8 interface, easy and efficient installation and maintenance. I/O slave modules can be configured to select I/O expansion ports as input or output, and each I/O slave module hub has 8 I/O expansion ports, with the relevant status indicator, user-friendly. The morning control I/O slave module hub is a standard IO-Link device designed according to IO-Link V1.1 specification, which supports COM3 communication rate.