SIL 4-Ready Safety on CompactPCI® PlusIO - Dual Redundancy for Rail Applications
OEM Technology Solutions
Pci, Electronic, Single Board Computer
2x Intel® E680T, 1.6 GHz for dual redundancy
1x Intel® E680T, 1.6 GHz, 1 GB DDR2 as I/O processor
Fail-safe and fail-silent architecture
Certifiable up to SIL 4
-40 C to +85°C operating temperature
EN 50155 compliant
The new F75P CompactPCI® PlusIO SBC was specially designed for rail applications and brings functional safety to the board level, using redundant Intel® Atom™ processors. While two redundant CPUs with independent RAM and Flash memory increase system safety, a third processor controls the I/O interfaces.
One Board, Three CPUs – Multiplied Safety
The safe F75P single-board computer unites the benefits of a 1oo2 multiprocessing system and the ruggedness and flexibility of the CompactPCI® PlusIO standard on one single card.
Two of the total three Intel® Atom™ E680T processors with 1.6 GHz and 512 MB DDR2 RAM are set up to be redundant, forming the safe control unit of F75P. The third Intel® Atom™ with 1 GB DDR2 controls I/O. It passes on the commands to the interfaces that were sent by the two control CPUs across an FPGA-based communication interface.
Two supervisor units monitor the environmental conditions specified for the two control CPUs and put the system into a safe state, for instance if the maximum operating temperature was exceeded. The output of a faulty processor is not passed through (fail-silent), or the complete system is shut down in case of an error and a train, for example, is stopped (fail-safe).
To increase the availability of a system, you can also connect two F75P SBCs to form a cluster. If one card fails, the second can take over from hot or cold stand-by, and operation can continue. An event logger allows tracing and simply reading out any hardware and application events.
Basically every F75P based system can be certified up to SIL 4 – a certificate by TÜV Süd, which confirms the board's suitability for SIL 3 requirements, is currently in preparation.
The standard front I/O of F75P comprises one VGA interface, two Fast Ethernet and two USB, while its rear gives access to one PCI Express® port, four USB, one SATA and two Fast Ethernet.
Characteristics typical of MEN such as the extended temperature range of -40 to +85°C, EN 50155 conformity, conformal coating and assembly of M12 connectors make the F75P a safe and at the same time robust solution – especially in rail applications where space is at a premium.
, Embedded Computer
, Single Board Computer