SATA hard drives and an external SATA port for additional storage. They are able to work in temperatures ranging from -10 ~ 60°C (14 to 140°F) and with shock/vibration absorbers for data storage security. Both are designed with 2 Intel Gigabit Ethernet ports to fulfill EtherCAT and real-time operating system requirements; 4 external USB 2.0 ports, 1 internal USB port, VGA display, programmable LED I/O indicators, isolated DI/DO, and 2 or 4 PCI slots, respectively, for peripherals.