PCD3 Standby processor unit with 2 Ethernet TCP/IP \nand Co-processor for Standby operation, \nweb and FTP server, file system, \nCPU with 2 MByte user program, \n1 MByte SRam extension memory, \n128 MByte user Flash memory with file system, \nclock (RTC), data protection 1-3 years, \nUSB port for PG5, up to 1024 I/O, 2 interrupt inputs, \nRS-485 for Profi-S-Net/MPI/S-Bus