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A602 - PowerPC Safe Computer

6U VME64

This product has been discontinued.

The A602 is a 6U, 64-bit VME COTS computer, certifiable up to SIL 4 and DAL-A, with triple redundancy for functional safety on a single board to achieve fail-operational, fault-tolerant behavior.

  • A602 Product ImageA602 Triple-Redundant 6U VME PowerPC® SBC
  • A602 Product ImageA602 Triple-Redundant 6U VME PowerPC® SBC
  • A602 Product Image
  • A602 Product Image

Main Features

  • 3x PowerPC 750 (lockstep mode), 3x 512 MB DDR RAM
  • Fail-operational, fault-tolerant behavior
  • Fail-safe and fail-silent board architecture
  • Clustering of two A602 to raise availability
  • Board management, BITE
  • SEU (radiation) tolerant
  • Certifiable up to SIL 4 (with report from TÜV SÜD) and DAL-A
  • Developed according to RTCA DO-254, EN 50129 and IEC 61508
  • EN 50155 compliance
  • Up to -40 to +70°C with qualified components
  • Convection or conduction cooling
A602 Product Image

Technical Data

  • 3x PowerPC 750 CL
    • Scalable performance
    • 1 GHz processor core frequency
    • Superscalar
    • Classic PowerPC FPU, MMU
    • CPU bus to FPGA: 100-MHz/64-bit
  • Lock-step operation
    • All CPUs do the same thing at the same time
    • 2-out-of-3 voting in FPGA with CPU bus clock speed (100MHz)
    • Software-assisted resynchronization
    • No functional interruption in case of an SEU inside the CPU
  • Chipset
    • North- and Southbridge realized in FPGA
  • 2x 32 kB L1 cache, 1MB L2 cache integrated in each CPU
  • 3 independent ranks of 512MB DDR SDRAM system memory, FPGA-controlled
    • 100MHz memory bus frequency (32 bit)
    • Up to 800 MB/s
    • 2-out-of-3 voting in FPGA
    • Scrubbing to prevent accumulation of SEU
    • No functional interruption in case of an SEU inside the memory
  • 2 independent ranks of 256MB Flash, FPGA-controlled
    • Primary and backup Flash ranks contain the same data, auto-selection by boot loader
    • ECC protection
  • 1MB FRAM
    • ECC protection
  • 4KB serial EEPROM for production data (serial number etc.)
  • All I/O realized in FPGA and available at rear I/O
  • Sextuple UART
    • E.g., for communication with other A602
    • Data rates up to 460,800 Baud for each channel
    • Handshake lines: none
  • RS232 UART
    • Also available at front panel
    • Data rates up to 460,800 Baud
    • 2x 256 Byte transmit/receive buffer
    • Handshake lines: none
  • I²C bus
Mezzanine Slots
Two PMC slots
  • 32 bit/33 MHz, 3.3V V(I/O)
  • PMC slot 1 with rear I/O
  • Voltage monitoring
  • Temperature monitoring
  • Watchdog
  • Reset signal control
  • Control of redundant power supplies
  • Sleep mode
    • Lowers power consumption in case of primary power supply interruption
    • Power failure indicated through signals from backplane
    • Supports power interruptions specified in Airbus directive ABD0100.1.9
    • CPUs and memory can be put into sleep mode
  • Redundant clock generation
  • Connection with second A602 possible (with special backplane)
    • Control of shared outputs
    • Exchange of state information
    • BMC and 6x UART link
Local PCI Bus
  • 32-bit/33-MHz, 3.3V V(I/O)
  • Compliant with PCI Specification 2.2
  • TSI148 controller
  • Compliant with VME64, VME64 and 2eSST specification
  • Slot-1 function with auto-detection
  • Master
    • D08(EO):D16:D32:D64:A16:A24:A32:ADO:BLT:RMW
  • 1MB shared fast SRAM
  • Mailbox functionality
  • Single level 3 fair requester
  • Single level 3 arbiter
  • Bus timer
  • Location Monitor
  • Performance
    • Coupled read/write D32 non-block transfer rate 6.5 MB/s
Electrical Specifications
  • Dual power input from VMEbus, uninterrupted (EN 50155, Class S1)
    • +5V (-3%/+5%)
    • +3.3V (-5%/+5%) optional
    • Standard backplane supplies both input rails with power
    • Continued operation if one power input fails (or is not present)
    • Separate power supplies for the three CPUs and the three main memory ranks
  • Supply voltage/power consumption:
    • 33W (39W when 3.3V are not supplied)
    • 6 W (optional +3.3V supply)
Mechanical Specifications
  • Dimensions: standard double Eurocard, 233.3mm x 160mm
  • Weight (without mezzanines and accessories): 548g
Environmental Specifications
  • Temperature range (operation):
    • 1-slot models: -40..+55°C, temperature classes T1, T2, and TX inside buildings, or in containers with temperature control for signalling equipment, according to EN 50125-3, table 2
    • 2-slot models: -40..+70°C, temperature classes T1, T2, and T3 for equipment onboard rolling stock, according to EN 50125-1, table 2
    • Airflow: min. 2 m/s
  • Temperature range (storage): -40..+85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300m to +2,000m (EN50124, Class AX)
  • Compliant to EN50125-1, meeting requirements of EN61373, Cat. 1, Class B and Classes GTX, GL3 for rolling stock
    • Shock: 50 m/s², 30 ms (EN 61373)
    • Vibration (function): 1 m/s², 5 Hz - 150 Hz (EN 61373)
    • Vibration (lifetime): 7.9 m/s², 5 Hz - 150 Hz (EN 61373)
  • For signalling equipment, a distance of 3m from the track bed is required
  • Protection class IP00 (EN50124, Category PD1)
  • All components soldered
  • 270 311 h @ 40°C according to IEC/TR 62380 (RDF 2000)
  • 424 061 h for continuous operation @ 25°C according to IEC/TR 62380 (RDF 2000)
  • Erroneous behavior of CPU/memory subsystem < 1E-8 / h
    • Considering hardware failures and worst-case SEU environment
  • PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
EMC Conformity
  • EN55011 (radiated emission disturbances - rolling stock)
  • EN 61000-6-4 (radiated emission disturbances - signalling equipment)
  • EN 61000-4-3 (electromagnetic field immunity)
  • EN61000-4-2 (electrostatic discharge immunity)
  • EN61000-4-8 (power - frequency magnetic field)
  • EN61000-4-9 (pulsed magnetic field)
BIOS/Boot Loader
Software Support
  • VxWorks, VxWorks/Cert
  • PikeOS


Mezzanine Slots
PMC slot 2 customized for AFDX PMC (rear I/O only)
Real-time Clock
Buffered by GoldCap
Environmental Specifications
Temperature range (operation):
  • -40..+70°C (8HP front panel with convection cooling or 4HP front panel with conduction cooling)
Some of these options may only be available for large volumes.
Please ask our sales staff for more information.

Ordering Information

Certification Packages

SIL 4 railway certification package according to EN 5012x for A602/D602



VxWorks BSP (MEN) for A602 and D602


This product is designed to work under PikeOS by SYSGO. PikeOS is a real-time operating system for use in safety and mission-critical systems which can be certified according to DO-178B DAL-B and EN 50128 SIL 4. For more information and product support please contact www.sysgo.com.

MENMON is an MEN firmware/BIOS for PowerPC platforms.

MENMON (Firmware) for A602 (object code)


Data Sheets
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