X20 Compact-S PLC, ARM Cortex-A9-667, 512 MB DDR3 RAM, 64 kB FRAM, 2 GB onboard flash drive, 2 USB interfaces, 1 RS232 interface, 1 POWERLINK interface, 1 Ethernet interface 10/100BASE-T, can be expanded with X20 interface slot. Order bus base, power supply module and terminal block separately!