These small S7-PLCs provide additional 3 periphery slots for INSEVIS- periphery below the 82mm wide metal rear cover. Of course they contain a large working- (512kB/1MB) and load memory (2MB/8MB). Also a lot of interfaces like Ethernet (S7-communication put/get, TCP, UDP), Modbus (-TCP and -RTU), CAN (CANopen and Layer2), RS232 and RS485 (free ASCII). Profibus DP V0 (Master/Slave at CPU-V) resp. Profinet IO Controller (at CPU-T, what provides 2 separated Ethernet-ports too) are available optionalls. Every slot can be labeled with customer logo and article number.