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Fiessler Programmable Safety Center

Description of function

The FPSC Fiessler Programmable Safety Center is a programmable electronic safety for personal protection, i.e. for safety functions. The FPSC complies with the highest safety requirements:

  • SK1 through SK 4 according to EN 954-1
  • SIL 1 through SIL 3 according to EN IEC 61508
  • PL a through PL e according to prEN 13849-1

The product family FPSC provides maximum flexibility within its hardware and software structure. The FPSC - AD version offers the possibility to connect decentralized I/O modules via the implemented safety bus. This guarantees a modular system design that offers flexibility therefore reducing the costly and often elaborate configuration of the safe system bus.

The safety-related functions are programmable by using pre-assembled and tested software modules. The chaining is made by simple assignment of input , i.e. output adresses. Intermediate data are stored in the temporary storage. There are various ready-to-use software modules at your disposal.

For the communication with a superior control, i.e. for the operating sequence control or technology control, a serial interface is provided. The transfer of data for visualizing as well as the transfer of machine-relevant data can de realised via this interface.

The simple snap-on mechanism for fastening the items on the DIN rail in the switch cabinet considerably reduces the installation expenditure of the items of the product family.

FPSC properties

  • Flexible Hard- and Software concept.
  • Available with a safe bus system or/and two counter inputs.
  • Reduction of expenditures in Mounting and Installation.
  • Easy programmable.
  • Software modules tested and certificated.
  • Safety category 4 according to EN 954-1, SIL 3 according to IEC 61508.
  • PL a through PL e according to prEN 13849-1.
  • Compact Safety SPS.
  • minimum response time.

Safety Integrity Level SIL 3 (IEC 61508)
Performance Level PL e (ISO 13849-1)
Safety category cat. 4 (EN 954-1)

FPSC Applications

  • special plant.
  • pressbrakes.
  • eccentric press.
  • shears.
  • hydraulic press.
  • testing automat.
  • pneumatic press.
  • special machines.
  • machining centre.
  • concatenated plants.
  • final assembly.
  • materials handling equipment.
  • test stands.
  • manual machines.
  • robotics cells.


Contact Extension

The contact extension FSEM serves FPSC to the extension or contact reinforcement for the safe control. Applications up to the category 4 after EN 954-1 can be realized.

FPSC - RS232 cable

Cable between the programming unit (PC, Notebook etc.) and the base units for programming the parameters.

FPSC - USB / RS232 adaptor

Interface converter from USB standard to RS232 for entering the parameters into the base units.

FPSC - CAN cable

cable for the safety-related networking of the decentralized modules and the base unit.


The FPSC-Profibus-DP serves to adapt a Modbus port from the FPSC to the ProfibusDP to EN 50 170. In this application, it functions as a gateway and operates as the ProfibusDP Slave. It can be operated by any standard-compliant Profibus Master.

FPSC Gateway to Profibus DP

  • Standard DIN-rail version.
  • Reduction of expenditures in Mounting and Installation.
  • Complete ProfibusDP Slave according to IEC 61158.
  • Support of up to 12 Mbaud in Profibus (autodetect).
  • Max. 244 byte input- and 244 byte output-data.
  • Support Modbus ASCII to Profibus DP.

  • FPSC-Ethernet-TCP/IP

    The FPSC-Ethernet-TCP/IP module serves to adapt a serial port of the FPSC to an Ethernet with TCP/IP-protocol. In this application, it functions as a gateway and operates as a server. It can be operated at any processing system with TCP/IP-protocol.

    FPSC Gateway to Ethernet

    • Standard DIN-rail version.
    • Reduction of expenditures in Mounting and Installation.
    • Complete Ethernet according to IEEE 802.3
    • Max. 1400 byte input- and 1400 byte output-data.
    • Isolated Ethernet-interface.
    • Support Modbus ASCII to Ethernet.
    • Ethernet Protocol (UDP/IP or TCP/IP).
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