Safety relays

Your Benefits

  • Fast response times reduce the safety distances and save production space
  • Simple configuration without additional auxiliary means, only with the help of jumpers


The UE401 evaluation unit safely and reliably evaluates the signals of the L4000 Systems single-beam photoelectric safety switches. It can also be used to execute the restart interlock and external device monitoring (EDM) functions.

At a glance
  • Restart interlock
  • External device monitoring (EDM)
  • Cascading single-beam photoelectric safety switches
  • Fast response time
  • Slim housing


Technical overview

  • Technical data overview

    Technical data overview

    ApplicationsEvaluation unit
    Safety integrity level

    SIL3 (IEC 61508) 1)

    SILCL3 (EN 62061) 1)

    CategoryCategory 4 (EN ISO 13849) 1)
    Performance levelPL e (EN ISO 13849)
    Configuration methodHard wired
    Housing width22.6 mm
    • 1) Only in conjunction with L40 sensors.
All technical data can be found accompanying the individual product