VIPA CPU 317PN Powered by SPEED7 Work memory [KB]: 8MB Integrated PROFINET controller SPEED-Bus Interface [RJ45]: PROFINET Interface [RJ45]: Ethernet PG/OP communication Interface [RS485]: MPI Interface [RS485]: PROFIBUS master/slave, PtP: ASCII, STX/ETX, 3964(R), USS master, Modbus master/slave SD/MMC card slot with locking, up to 32 modules stackable, programmable with WinPLC7, SIMATIC Manager and TIA Portal