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F75P - Vital Embedded Single Board Computer, 3 Intel Atom E6xx

3U CompactPCI PlusIO

The F75P is an x86 Intel Atom E680T based fail-safe vital embedded computer, certifiable up to SIL 4 with onboard dual redundancy for functional safety and a third CPU for I/O communication. It targets safety-critical applications in embedded railway and wayside computers and in industrial automation. F75P is also part of the menTCS Train Control System.

  • F75P Product ImageF75P with RJ45 connectors
  • F75P Product ImageF75P with M12 connectors
  • F75P Product ImageF75P with M12 connectors
  • F75P Product ImageMH50C MEN Train Control System (menTCS) Controller for Rolling Stock, with F75P Safe CPU, RT Ethernet and I/O Boards
  • F75P Product ImageMA50C AAR IP65 MEN Train Control System (menTCS) Controller for Rolling Stock, with F75P Safe CPU, RT Ethernet and I/O Boards
  • F75P Product ImageSIL 4 certificate from TÜV SÜD for F75P/QNX bundle (included in 23F075P40)
  • F75P Product ImageSIL 4 certificate from TÜV SÜD for F75P/3U Safe Computer (included in 23F075P00)
  • F75P Product Image
  • F75P Product Image
  • F75P Product Image
  • F75P Product Image
  • F75P Product Image
  • F75P Product Image
  • F75P Product Image

Main Features

  • 2x Intel Atom E6xx, 512 MB DDR2 RAM (each) for onboard dual redundancy
  • 1x Intel Atom E6xx, 1 GB DDR2 for I/O
  • Independent supervisors for each block
  • Fail-safe board architecture
  • Clustering of two F75P to raise availability
  • Event logging
  • Certifiable up to SIL 4 (with report from TÜV SÜD)
  • SIL 4 certification packages available for hardware and software (QNX)
  • Developed according to EN 50129, EN 50128 and IEC 61508
  • Full EN 50155 compliance
  • -40°C to +85°C qualified
  • Conformal coating
F75P Product Image

Technical Data

CPU Architecture
  • Three onboard processors
    • Two Control Processors (CP)
    • One I/O Processor (IOP)
    • Inter-communication between all three processors via onboard Ethernet or Shared RAM
  • Three identical processor types
  • The following CPU types are supported:
    • Intel Atom E620T, 0.6 GHz, 320 MHz graphics frequency, 3.3 W TDP (estimated)
    • Intel Atom E640T, 1.1 GHz, 320 MHz graphics frequency, 3.6 W TDP
    • Intel Atom E660T, 1.3 GHz, 400 MHz graphics frequency, 3.6 W TDP
    • Intel Atom E680T, 1.6 GHz, 400 MHz graphics frequency, 4.5 W TDP (estimated)
  • Main function of CPs
    • Provide a "Safe Domain" on the board, including processors, memory, supervisors and power control
    • Provide flexible implementation options for functional safety requirements
    • Provide support for advanced, certified operating systems up to SIL 4
  • Main function of IOP
    • Provide common I/O and memory facilities
    • Provide a user-friendly software interface and GUI
Memory (connected to CPs)
  • 512 KB L2 cache integrated in E6xx for each processor
  • System RAM
    • Soldered DDR2
    • 512 MB, or 1 GB, to each of the Control Processors (CP)
  • Boot Flash
    • 2 MB
Chipset (connected to IOP)
Intel EG20T Platform Controller Hub (PCH)
Memory (connected to IOP)
  • 512 KB L2 cache integrated in E6xx
  • System RAM
    • Soldered DDR2
    • 1 GB, or 2 GB
  • 2 MB BIOS Flash
  • 8 KB non-volatile FRAM for event logging
Mass Storage (connected to IOP)
The following mass storage devices can be assembled:
  • mSATA disk (for IOP boot image and file system)
Graphics (connected to IOP)
Integrated in E6xx processor
  • 320 or 400 MHz graphics base frequency, depending on processor type
  • Maximum resolution: 1280 x 1024 pixels
Front Interfaces (controlled by IOP)
  • Video
    • One VGA connector
  • USB
    • Two Type A connectors, host, USB 2.0
  • Ethernet
    • Two RJ45 connectors, 100BASE-T, or
    • Two M12 connectors, 100BASE-T, on right side of CPU PCB, or
    • Two M12 connectors, 100BASE-T, on left side of CPU PCB
    • Two link and activity LEDs per channel
  • Status LED
  • Reset button
Onboard Interfaces
  • Four channels, 100BASE-T, via Inter-Communication FPGA
Rear Interfaces (controlled by IOP)
  • SATA
    • One channel, SATA Revision 2.x
  • USB
    • Four channels, USB 2.0
  • Ethernet
    • Two channels, 100BASE-T
  • PCI Express
    • One x1 link, PCIe 1.0a
  • Cluster Link
    • Two F75P boards can be connected to form a cluster
    • Cluster link interface based on RS422; bidirectional, full-duplex, differential interface
  • Compatible with PICMG 2.30 CompactPCI PlusIO
    • 1PCI33/1PCIE2.5/1SATA3/4USB2/2ETH100
    • Some pins are used for signals differing from the PICMG 2.30 specification, e.g., for clustering. However, these signals do not destroy or cause any malfunction of a connected I/O board based on this standard.
Supervision and Control
  • Three independent supervisors for Control Processors and Inter-Communication FPGA
    • Check for overvoltage, undervoltage, excess temperature, internal errors of FPGA and CPUs, CPU and FPGA clock
    • Watchdog, configurable as a window or timeout watchdog
  • Board Management Controller for I/O Processor
  • Event logging
    • Event history logged in non-volatile FRAM, e.g., reset, overvoltage, undervoltage, excess temperature
    • 256 entries possible
    • Events are generated by board hardware or user application
  • Real-time clock with supercapacitor backup connected to I/O Processor
    • Data retention of supercapacitor: 56 hours when fully loaded, after 3 years runtime @ 40°C, 24h operation
Backplane Standard
  • CompactPCI Core Specification PICMG 2.0 R3.0
    • System slot
    • 32-bit/33-MHz CompactPCI bus
    • V(I/O): +3.3 V (+5 V tolerant)
  • Hot insertion and removal without damage
Busless Operation
  • Board can be supplied with +5 V only, all other voltages are generated on the board
  • Backplane connectors used only for power supply
Electrical Specifications
  • Supply voltage
    • +5 V (-3%/+5%)
  • Power consumption
    • 4.5 A typ.
    • 5 A max.
Mechanical Specifications
  • Dimensions
    • 3U, 4 HP, or
    • 3U, 8 HP
  • Weight
    • 402 g (model 02F075P00, 4 HP, RJ45 connectors)
    • 626 g (model 02F075P01, 8 HP, M12 connectors)
Environmental Specifications
  • Temperature range (operation):
    • -40°C to +50°C (model 02F075P00)
    • -40°C to +85°C, compliant with EN 50155, class TX, and EN 50125-3 (model 02F075P01)
    • Conditions: airflow 1.5 m/s, typical power dissipation: 22.5 W
  • Cooling concept
    • Air-cooled (with tailored heat sink), or
    • Conduction-cooled in MEN CCA frame
  • Temperature range (storage): -40°C to +85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300 m to +3000 m
  • Vibration (function): 1 m/s², 5 Hz - 150 Hz (EN 50155 (12.2.11) / EN 61373)
  • Vibration (lifetime): 7.9 m/s², 5 Hz - 150 Hz (EN 50155 (12.2.11) / EN 61373)
  • Shock: 50 m/s², 30 ms (EN 50155 (12.2.11) / EN 61373)
MTBF: 277 975 h @ 40°C according to IEC/TR 62380 (RDF 2000)
  • Functional Safety
    • Certifiable up to SIL 4 according to EN 50129 ("safety case" document and certificate from TÜV SÜD available)
    • Tolerable hazard rate (THR) for safety functions <= 1E-9 / h
    • Control Processors configured for deterministic behavior, e.g., Hyper-Threading disabled, speed-step disabled, BIOS interrupts disabled
    • Board maintains safe state after a failure (factory configuration)
    • Option: Board can be configured to restart automatically after entering safe state (by factory configuration)
  • Fire Protection
    • EN 45545-2, hazard level HL3
  • When integrated into an EMC protected rack
  • EN 50121-3-2 (tables 5 and 6) / EN 55011 (radio disturbance)
  • EN 50121-3-2 (table 9) / IEC 61000-4-6 (ESD)
  • EN 50121-3-2 (table 9) / IEC 61000-4-3 (electromagnetic field immunity)
  • EN 50121-3-2 (table 8) / IEC 61000-4-4 (burst)
  • EN 50121-3-2 (table 8) / IEC 61000-4-6 (conducted disturbances)
InsydeH2O UEFI Framework
Software Support
  • I/O Processor
    • Linux
    • QNX
    • VxWorks (on request)
  • Control Processors
    • QNX (with or without Safe Kernel)
    • PikeOS
    • Linux
    • VxWorks (on request)
    • VxWorks/Cert (on request)
  • For more information on supported operating system versions and drivers see Software.

Ordering Information

Standard F75P Models

3x Intel Atom E680T (1.6 GHz), 2x 512 MB, 1x 1 GB DDR2 DRAM, RJ45 ETH connectors, 4 HP, -40..+50°C with qualified components, conformal coating


3x Intel Atom E680T (1.6 GHz), 2x 512 MB, 1x 1 GB DDR2 DRAM, 8 HP, Ethernet on the right by 2x M12, -40..+85°C with qualified components, conformal coating


3x Intel Atom E680T (1.6 GHz), 2x 512 MB, 1x 1 GB DDR2 DRAM, 6 HP, front: 1 VGA, 2 USB, 2 Fast Ethernet (RJ45), -40..+85°C qualified, air-cooled, conformal coating

Miscellaneous Accessories

Extension board to adapt 3U CompactPCI or CompactPCI Serial (CPCI-S.0) boards to 6U format; for evaluation purposes

Related Hardware
CT12 - Rear I/O Transition Module

CompactPCI PlusIO rear transition module 3U/80mm, 2 Ethernet, 4 USB, 4 SATA, 4 PCIe x1, -40°C..+85°C qualified

Mass Storage

SSD mSATA, 8 GB, -40°C to +85°C

Systems & Card Cages
MH50C - menTCS Vital System Controller

The MH50C is a build-to-order system which is delivered with an example image, The image contains a non-safe standard QNX operating system.
It consists of the 40 HP basic system including backplane and mounting rails and provides:

  • 1 slot for PSU
  • 1 CompactPCI PlusIO slot for the CPU board
  • 7 CompactPCI peripheral slots

The barebone configuration comprises a number of standard, non-configurable components such as the PSU and CPU board. I/O boards are completely configurable. The Technical Data list all components that can be implemented in the system. Choose the functionality you need and contact MEN's sales team to verify which board combinations are feasible.

0701-0056 - CPCI to CPCI Serial Hybrid Rackmount Enclosure, 8 Slots, 3U Cards Vertical

CompactPCI 19" 4U/84HP rack-mount enclosure for 3U cards (vertical), 4+4-slot 3U CompactPCI / CompactPCI Serial hybrid backplane, prepared for rear I/O, 250W power supply wide range 90..264VAC on rear, 1U fan tray with 2 fans included, 0..+60°C


MEN delivers turn-key systems completely installed (hardware, operating system, accessories), wired and tested. Different rack sizes, power supplies and backplanes on request.
For details please contact your local sales representative.

Certification Packages

SIL 4 railway certification package according to EN 5012x for F75P


SIL 4 railway certification package according to EN 5012x for F75P with QNX



MDIS5 System (and Device Driver) Package (MEN) for Linux. This software package includes most standard device drivers available from MEN.


Linux driver (MEN) for RX8581/RX-8574 real-time clock for all products with an additional RTC component. Please note that this driver is already included in upstream Linux kernels starting from 3.14!


Linux demo application (MEN) for F75P


Linux Ethernet driver (MEN) for F75P


SIL 4 railway certification package according to EN 5012x for F75P with QNX


This product is designed to work under PikeOS by SYSGO. The PikeOS BSP is certifiable according to EN 50128 SIL 4 together with the F75P. PikeOS is a real-time operating system for use in safety and mission-critical systems. For more information please contact www.sysgo.com.

Application Examples

Vital Train and Wayside Control

ATO (Automatic Train Operation) and ATP (Automatic Train Protection) minimize accidents caused by human error, increase the train frequency on the tracks, or avoid overspeed and overrunning red signals.

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