DFI EHL556 3.5" Intel Elkhart Lake SBCs with Triple Display and -40 to 85 °C

Boards that live in roadside cabinets, kiosks and machine enclosures have to start in frost, run in summer heat and accept whatever DC supply the site provides. The DFI EHL556 series is built for that brief: a family of 3.5 inch SBCs on Intel Elkhart Lake processors, rated -40 to 85 °C for operation and storage, with a 9 to 36 V DC wide-range input on the board.

Every EHL556 shares one layout. One DDR4-3200 SO-DIMM socket takes up to 32 GB, and Intel HD Graphics drives three independent displays from VGA, a DP++ output at up to 4096 x 2304 at 60 Hz and an LVDS or eDP panel connector; VGA can be changed to HDMI 2.0 as a BOM option. Two GbE ports on Intel I225-IT controllers and two USB 3.1 Gen 2 ports at 10 Gbps sit on the rear, with four USB 2.0, serial ports, Realtek ALC888 audio, one SATA 3.0 port and a front panel header on internal headers. Expansion is an M.2 2230 E key that supports Wi-Fi 5 and Wi-Fi 6 modules and a Mini PCIe socket that can be built as an M.2 2280 B key for a SATA SSD.

The series offers three builds. The EHL556-N6210 carries a dual-core Intel Celeron N6210 at 6.5 W with an eDP panel interface, one RS-232/422/485 port, 8-bit GPIO and I2C. The EHL556-6413E carries a quad-core Intel Atom x6413E at 9 W with LVDS and two COM ports, one RS-232/422/485 and one RS-232. The EHL556-6425E carries a quad-core Intel Atom x6425E at 2.0 GHz base and 12 W, with the same LVDS and dual COM layout for heavier graphical software.

Power is 9 to 36 V DC on a DC jack or a vertical 4-pin connector, which lets the board run from 12 V or 24 V supplies. Every build is rated -40 to 85 °C and 5 to 90% humidity, TPM 2.0 is listed on all three part numbers, and a watchdog timer resets the system after 1 to 255 seconds. A heatsink and heatspreader thermal module is an optional item. The boards measure 146 x 102 mm, and DFI lists Windows 10 IoT 2019 LTSC, Windows 10 IoT 2021 LTSC and Linux support.