These handle data exchange with the PROFINET IO controller in the PLC|Integrated 2-port switch for line topology|Maximum 30 I/O modules|Shortest bus cycle 250 us|FW update|Linking to the isochronous task of the CPU|Prioritized fast startup (FSU) with max. 12 I/O modules|Media redundancy protocol (MRP)|Shared device on up to two IO controllers (when configuring using GSD file, depends on the respective configuration tool)|Omission of SIMATIC memory card (SMC), IM replacement without PG using LLDP|Operation of F-modules and PROFIsafe|Submodule granular shared device with up to 2 IO controllers|Configuration control (option handling)|Module shared input and module shared output (MSI/MSO), i.e. the inputs or outputs of a module can be made available simultaneously to up to 2 IO controllers