CPU 013C Powered by SPEED7 Work memory [KB]: 64...128 Integrated PROFINET Controller (limited to 8 Devices) / I-Device Onboard 16x DI / 12x DO / 2x AI [voltage 0...10 V] ] / 4x Counter / 2x [PWM/Pulse Train] Interface [1x RJ45]: PROFINET, ModbusTCP master/slave, openCommunication Interface [1x RJ45]: active Ethernet PG/OP communication with DHCP support, switch Interface [RS485]: MPI, PtP: ASCII, STX/ETX, 3964 (R), USS master, Modbus master/slave Optional: PROFIBUS master/slave Integrated OPC UA server and Web server SD card slot with locking, up to 64 expansion modules, configurable with SPEED7 Studio, SIMATIC Manager and TIA Portal