Safety relays

Rely on safety relays from SICK

Your Benefits

  • Short safety distances owing to fast response times for compact machines and a high level of productivity
  • Short maintenance times and low maintenance costs during module replacement thanks to plug-in terminals and the simple method of removing the safety relay from the mounting rail
  • More space available in the control cabinet thanks to the slim housing
  • Intuitive troubleshooting due to versatile diagnostics interfaces
  • Easy wiring and installation – only one connection diagram required per module


Rely on safety relays from SICK

The safety relays from the ReLy product family monitor safety functions or safety sensors up to performance level e. The ReLy portfolio is clear and concise. Each of the four ReLy modules contains everything that a modern safety relay needs. Two contact paths for switching off machines safely. Fast response time of 10 ms for short safety distances. Plug-in terminals for short maintenance times. A slim housing for added space in the control cabinet. Versatile diagnostics options for quick and easy troubleshooting. Simply the sensor type to be connected determines which product is the right one to choose.

At a glance
  • Safety relays for monitoring ESPE and safety switches
  • Up to PL e (EN ISO 13849), SIL3 (IEC 61508)
  • 2 safety outputs, fast response time of 10 ms
  • Slim housing
  • Plug-in terminals
  • Diagnostics via status LEDs and application diagnostic outputs



Discover intelligent protection for higher productivity

Learn more


Technical overview

  • Technical data overview

    Technical data overview

    ApplicationsOutput expansion module for OSSDs / evaluation unit
    Safety integrity level

    SIL3 (IEC 61508)

    SILCL3 (IEC 62061)

    CategoryCategory 4 (EN ISO 13849)
    Performance levelPL e (EN ISO 13849)
    Sensor monitoring

    Discrepancy monitoring

    Sequence monitoring

    Cross-circuit detection

    Typical response time10 ms
    Number of enable current contacts2
    Housing width18 mm
All technical data can be found accompanying the individual product