SC21 - Intel Atom SBC for Control of Multiple 10.4" to 21" Displays (Product Discontinued)

The SC21 is a rugged, fanless and maintenance-free single-board computer for intelligent display devices, e.g., for infotainment purposes in trains, public buses or airplanes. Its small size makes it suitable for display devices with TFT LCD panels as small as 10.4".

The SC21 is controlled by the Intel Atom XL Z520PT running at 1.33 GHz and comes with 1 GB of DDR2 SDRAM and a MicroSD card slot. The standard interfaces comprise 2 Fast Ethernet (via RJ45 connectors) and 2 USB ports as well as four binary inputs (via the 10-pin power supply connector). The two Ethernet interfaces have switch functionality to provide Ethernet connection to subsequent intelligent displays. A temperature sensor is provided to monitor and control the display. With the exception of the LVDS signals and the display backlight brightness control, all I/O signals are concentrated on a customizable connector PCB, including a USB-driven connector for a touch interface.

The SC21 is equipped with an internal 9 to 36V (12VDC nom. or24VDC nom.) wide-range power supply and able to operate in a -40 to +70°C environment (+85°C for 10 minutes) with sufficient cooling. It complies with the class Tx railway standard, an optionally available external PSU suited for railway applications canalso provide EN 50155 conformity. All electronic components are soldered to withstand shock and vibration and prepared for conformal coating.

Options include other types of the Intel Atom XL processor, a brightness sensor to control the display, a serial interface that can be added via an SA-Adapter, HD audio via a D-Sub connector and an additional LVDS connection for a secondary display, with the two displays then showing individual or identical content as required by the application. A PCI Express Mini Card slot (with a SIM card slot) in combination with an external antenna can be used to incorporate wireless functions like Wi-Fi, WIMAX, GSM/GPRS, UMTS etc.


  • For LCD TFT panels sized 10.4" and larger
  • LVDS up to 1366 x 768
  • Backlight control, prepared for touch
  • Intel Atom Z520PT, 1.33 GHz
  • 1 GB RAM, microSD card slot
  • PCI Express Mini Card and SIM card slot for WLAN, UMTS, GPS, GSM, HSDPA, EDGE, LTE
  • 2 FastEthernet, 2 USB 2.0
  • SA-Adapter slot for serial interface
  • Power supply 9 to 36 VDC (12 or 24 V nom.)
  • Prepared for -40 to +85°C (screened)
  • Optimized for conductive cooling
  • EN 50155 compliant (with special PSU) (railways)
  • Prepared for ISO 7637-2 compliance (E-mark for automotive)


  • Intel Atom Z520PT
    • 1.33 GHz processor core frequency
    • 533 MHz system bus frequency
  • Chipset
    • Intel system controller hub US15W
  • 1GB DDR2 SDRAM system memory
    • Soldered
    • 533 MHz memory bus frequency
  • MicroSD card slot
  • SATA interface for HDD/SSD
    • Transfer rates up to 100 MB/s
  • 1 LVDS 25-pin connector
    • For direct connection of an LVDS display with a resolution of up to 1366x768 (secondary interface with up to 1900x1200)
  • 1 LVDS backlight 10-pin connector
    • Brightness control via software
PCI Express Mini Card slot
  • For functions like Wi-Fi, WIMAX, GSM/GPRS, UMTS
  • SIM card slot
  • PCI Express and USB interface
  • Accessible via, e.g., a reverse SMA connector
  • USB
    • Two USB 2.0 host ports
    • Accessible via Type A connectors
    • UHCI implementation
    • Data rates up to 480 Mbit/s
  • Ethernet
    • Two 10/100Base-T Ethernet channels
    • Accessible via RJ45 connectors
    • Switch functionality
  • Touch interface connector
    • USB-driven 4-pin connector
    • Touch technology depending on touch sensor, touch controller and software
  • 4 binary inputs via 10-pin power connector
    • Universal inputs, e.g., for geographical addressing
Intelligent Power Supply with Controller
  • Voltage supervision
  • Temperature supervision via LM50 sensor
  • Backlight control (turns off display at configurable temperatures)
  • Buffer functionality for RTC and BIOS CMOS
  • Reset of CPU board possible
  • Wake on time
  • Watchdog
  • Accessible via SMBus
Electrical Specifications
  • Supply voltage:
    • 12 VDC nom. or 24 VDC nom. (9 to 36 V)
  • Power consumption:
    • Ca. 8 W (without display)
Mechanical Specifications
  • Dimensions: 220 mm x 150 mm x 35 mm
  • Weight: approx. 240 g (320 g with heat sink)
Environmental Specifications
  • Temperature range (operation):
    • -40°C to 70°C, with up to 85°C for 10 minutes according to class TX (EN 50155) depending on cooling concept (sufficient cooling required)
    • Prepared for conductive cooling (via connection from mounting frame to metal display housing)
    • Fanless operation
  • Temperature range (storage): -40..+85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300 m to + 3,000 m
  • Shock: according to EN 50155 (10.2.11)
  • Vibration: according to EN 50155 (10.2.11)
213,000 h @ 40°C according to IEC/TR 62380 (RDF 2000)
  • Conforming to EN 50155, EN 50121-3-2/EN 61000-4-5
  • Prepared for certification according to ISO 7637-2 (E-mark) requirements
Software Support