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SafeFlex

FPGA based evaluation board for safety solutions up to SIL 3 and PLe, Cat4


The SafeFlex – Functional Safety Development Kit (FSDK) consists of an FPGA based evaluation board. With the realization of an FPGA based solution in safety related systems, a considerable reduction in costs for development and certification is achieved. Time to market is reduced noticeably.
The SafeFlex – FSDK includes an instruction manual for the whole safety development and assists you to reduce risks, design costs, design time, process overhead. It improves your platform development, flexibility, modularity and safety integrity level (SIL).

Customer benefits

  • Die Vorgaben der IEC 61508 bis SIL 3 erfüllen
  • Die Vorgaben der ISO 13849 bis Pl e Kat 4 erfüllen
  • Ihr Risiko bei der Entwicklung minimieren
  • Ihre Entwicklungskosten reduzieren
  • Die Zeit bis zur Markteinführung verkürzen

Typical applications

  • Industriell
  • Automotive
  • Energiemanagement

System overview

openSAFETY Solution

The concept is discussed with the TÜV Rheinland for safety systems up to IEC 61508 - SIL3 and is depicted in following block diagram. SafeFlex – FSDK is supporting now fieldbus communication with a safety protocol. The first supported fieldbus is the Ethernet POWERLINK from our partners EPSG and Softing. openSAFETY from EPSG is used as safety protocol.
The architecture describes a system consisting of two FPGAs. Each FPGA design consisting of two softcore processors with openSAFETY stack in lockstep. One of the FPGAS has an additional processor with a POWERLINK stack.


Key features

  • 1oo2 architecture
  • HFT = 1 (IEC 61508)
  • Two FPGA
  • 6 safety digital signal inputs
  • 4 safety digital signal outputs
  • 2 test outputs
  • DDR3 SDRAM
  • EEPROM
  • Watchdog
  • 2 Industrial Ethernet
  • Monitored power supply

    Technical specification

    • Operating Voltage: 24 VDC
    • Input Voltage (recommended): 18-36 VDC
    • FPGA Main: 3
    • FPGA Child: 3
    • DDR3 SDRAM: 2-Gbit(128Mbx32)(two devices per FPGA)
    • EEPROM: 3
    • Clock Speed: 50 MHz
    • DSI Signal 0: < 5V
    • DSI Signal 1: > 11V
    • DSO continuous current: 500mA
    • DSO short circuit protection: External protection necessary
    • DSO switching frequency: 10Hz
    • Networking: Ethernet 10/100
    • Standard Digital I/O Pins (3.3V): 32
    • Support Arduino Shields: 3
    • Length: 160mm
    • Width: 160mm

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    Matthias Wolbert
    Matthias Wolbert
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