DFI IRN556-TN-x7835RE Intel Atom x7835RE 3.5″ Single Board Computer with 9 to 36 V DC Input and -40 to 85 °C

A substation or rail data concentrator can poll dozens of meters and relays over serial lines, then publish the results upstream, all from a cabinet that sees frost and summer heat. The IRN556-TN-x7835RE puts eight cores behind four COM ports for that job. It is the top Amston Lake option in the IRN556 series, a 3.5″ single board computer rated from -40 to 85 °C.

The Intel Atom x7835RE is an eight-core Amston Lake processor running from 1.3 to 3.6 GHz within a 12 W TDP. Eight cores let polling, protocol conversion, local storage and analytics run as separate services with room to spare. One DDR5 4800 MHz SO-DIMM slot takes up to 16 GB, and Intel UHD Graphics decodes HEVC, VP9, AV1 and AVC in hardware. A discrete TPM 2.0 and a programmable 1 to 255 s watchdog support secure, unattended operation, and DFI lists Windows 11, Windows 10 IoT Enterprise and Linux.

Two RS-232/422/485 and two RS-232 ports sit on internal headers with 8-bit DIO and two USB 2.0 ports. The rear carries two GbE ports on Intel I210IT controllers, four USB 3.2 Gen 2 Type-A ports and HDMI up to 4096 x 2160, with dual-channel LVDS for a local panel. M.2 sockets take a PCIe Gen3 x2 or SATA SSD, a cellular modem with nano SIM and a Wi-Fi card.

The IRN556-TN-x7835RE runs fanless on 9 to 36 V DC through a 4-pin connector, with CE, FCC, UKCA and RoHS compliance. If four cores are enough at the same temperature rating, the IRN556-TN-x7433RE runs at 9 W. For indoor cabinets, the IRN556-BN-N355 offers eight Twin Lake cores up to 3.9 GHz, rated from -5 to 65 °C.