X20 Compact-S CPU, ARM Cortex A9-300, 128 MByte DDR3 RAM, 16 kByte FRAM, 1 GByte Flash Drive on board, 2 USB ports, 1 RS232 interface, 1 POWERLINK interface, 1 Ethernet port 10/100 Base-T, capability for X20 interface slots, order bus base, power supply module and terminal block separately.