The WSU/WEU26-3 photoelectric safety switch is used for access protection for hazardous areas on machines or systems. It has a self-testing sender and receiver. The devices are firmly mounted in the access area with the necessary safety distance from the nearest hazardous point, and send a deactivation signal to the machine or system if the light beam is interrupted.


  • Type 4 (IEC 61496), SIL3 (IEC 61508), PL e (EN ISO 13849)
  • Rugged construction
  • Universal application possibilities
  • Ranges up to 70 m
  • Relay outputs
  • Front screen heating


Safety level Type 4, PL e, SIL3, SILCL3
Scanning range 20 m / 70 m
Construction size 50 mm x 156 mm x 116 mm
Supply voltage 24 V DC (19.2 V DC … 28.8 V DC)
Enclosure rating IP67 (EN 60529)
Ambient operating temperature –25 °C … +55 °C

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