Safety controllers
Flexi Classic

Efficient and easy-to-use safety controller

Your Benefits

  • Optimal scalability prevents extra inputs and outputs, reducing hardware
  • Configuration via rotary DIP switch simplifies logic configuration
  • The Flexi Classic Configurator tool offers easy logic configuration and wiring help
  • Complete diagnostics of the system reduces downtime
  • Its compact design makes it possible to save space in the control cabinet
  • Significantly reduced wiring compared with conventional safety solutions. Wiring with Flexi Loop is even easier.


Efficient and easy-to-use safety controller

The Flexi Classic modular safety controller supports the straightforward creation of logic without any software. This allows the user to adapt the configuration to the requirements of the application concerned. Logic functions are configured with rotary DIP switches. These switches are located directly on the modules, enabling quick and easy commissioning. An internal bus manages communication between the individual modules, reading out diagnostic information about the safety system. The product family includes gateways, which have no influence on the logic settings and are used for connection to a higher-level non-safe controller. The gateways collect and forward the information about the system, ensuring quick diagnostics. The Flexi Classic also offers the Flexi Classic configurator as a Configuration Planner tool, which offers a wiring diagram for the constructed project. Special modules for muting complete this product family, which provides efficient solutions for a whole host of applications.

At a glance
  • Rotary switch for easy function adjustment
  • Modular extension possible
  • Direct wiring for all types of sensors
  • Logic functions: AND, OR, muting, bypass, reset, EDM
  • Integration into all common fieldbuses
  • Integration of the Flexi Loop safe sensor cascade
  • Special muting modules are able to meet all the requirements of a demanding muting application


Sensor solutions for robotics
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Sensor solutions for robotics
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Working together as equals

Thanks to sensors from SICK, robots perceive more precisely. For all challenges in the field of robotics: Robot Vision, Safe Robotics, End-of-Arm Tooling, and Position Feedback.
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Technical overview

  • Technical data overview

    Technical data overview

    Safety integrity level

    SIL3 (IEC 61508)

    SILCL3 (EN 62061)

    CategoryCategory 4 (EN ISO 13849)
    Performance levelPL e (EN ISO 13849)
    Configuration methodVia rotary switch / hard wired
    System construction


    1 main module

    0 ... 11 expansion modules

    0 ... 8 relay modules

    0 ... 1 gateways

    Fieldbus, industrial networkEtherNet/IP™, Modbus, PROFINET, PROFIBUS DP, CANopen, DeviceNet™
    Safe networkingGlobal emergency stop
    Safe drive monitoring
    Flexi Loop-compatible
All technical data can be found accompanying the individual product