Safety relays

Your Benefits

  • Short safety distances owing to fast response times for compact machines and a high level of productivity
  • Easy commissioning and quick module exchange thanks to plug-in terminals and one-click mounting rail release
  • More space available in the control cabinet thanks to the slim housing
  • Intuitive troubleshooting due to a wide range of diagnostics interfaces
  • Easy wiring and installation – only one connection diagram required per module


The safety relays from the ReLy product family monitor safety functions and safety sensors up to performance level e. The ReLy portfolio is clear and concise. Each ReLy module has everything a modern safety relay needs: Up to 4 contact paths for the safe switch-off of machines, quick response times for short safety distances, plug-in terminals for short maintenance times, a slim housing for more space in the control cabinet and extensive diagnosis options for quick and easy troubleshooting. The sensor type to be connected alone can determine which product is the right choice.

At a glance
  • Safety relays for monitoring ESPE and safety switches
  • Up to PL e (EN ISO 13849), SIL3 (IEC 61508)
  • Up to 4 safety outputs and short response times
  • Slim, user-friendly housing
  • Plug-in terminals
  • Diagnostics via status LEDs and application diagnostic outputs


Technical overview

  • Technical data overview

    Technical data overview

    ApplicationsEvaluation unit / output expansion module for OSSDs / evaluation unit for stop category 1 applications
    Safety integrity level

    SIL3 (IEC 61508)

    SILCL3 (IEC 62061)

    CategoryCategory 4 (ISO 13849-1)
    Performance levelPL e (ISO 13849-1)
    Sensor monitoring

    Discrepancy monitoring

    Cross-circuit detection

    Sequence monitoring

    Typical response time

    10 ms

    12 ms

    Configuration methodHard wired / hard wired / DIP switch
    Housing width18 mm / 28 mm
All technical data can be found accompanying the individual product