The module provides 7 serial interfaces, including two RS232, two SPI, two I²C and one single USB. The interfaces are divided into two groups:
One group of interfaces are to an external master/host or higher-level control unit such that the module acts as a slave receiving commands (pins 4~12).
The second group is designed as master interfaces and allows the device to control external sensors and actors (pins 43~50). With this group, the module acts as a master.