Safety controllers
Flexi Classic

Efficient and easy-to-use safety controller

Your Benefits

  • The optimal scalability thanks to the modular construction prevents redundant inputs and outputs as well as reducing hardware
  • Configuration via rotary switch simplifies logic configuration
  • Flexi Classic configurator tool offers easy logic configuration and wiring help
  • Complete diagnostics for the system, preventing unplanned downtime
  • The compact design enables significant reduction of the control cabinet width
  • 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 enables straightforward configuration without any software. This allows the user to adapt the logic evaluation settings to the requirements of the application concerned. Logic functions are configured through rotary switches. These switches are located directly on the modules, enabling quick and easy commissioning. Communication between the individual modules is achieved via an internal bus, providing users interface information about the diagnostics of the safety system. The product portfolio includes gateways, which have no influence on the adjusted logic and are used for connection to a higher-level, non-safe control. The gateways collect and forward the information of the system, ensuring quick diagnostics. The Flexi Classic also offers the Flexi Classic configurator tool as a configuration aid to provide a wiring diagram for the created 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 series connection
  • Special muting modules are able to meet all the requirements of a demanding muting application


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Robotics image

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 levelPL e, SIL3
    Configuration methodVia rotary switch
    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 series connection with Flexi LoopFlexi Loop
All technical data can be found accompanying the individual product