X67BCG321L12Fieldbus: EtherCAT16 digital channels, configurable as inputs or outputsAuto-configuration of I/O modulesI/O configuration and firmware update via the fieldbus (FoE)Integrated connection to local expansion via X2X Link for 250 additional modulesFull support of the modular slice concept via CoE (CANopen over EtherCAT)Configurable I/O cycle (0.2 to 4 ms)Synchronization between the fieldbus and X2X Link