Single-beam photoelectric safety switches
L4000 Systems

Complete system that is highly reliable and offers fast response times

Your Benefits

  • Easy integration due to small, compact versions with maximum range
  • Flexible device integration makes it possible to set up individual access protetions
  • Fast response times reduces safety disctance and saves production area
  • Extremely well suited for extreme ambient conditions such as heat, cold or moisture
  • Straightforward configuration without a computer, only with the help of jumpers


Complete system that is highly reliable and offers fast response times

The L4000 system consists of the UE401 safety evaluation device and photoelectric safety switches. The UE401 safety evaluation device functions as the link between the photoelectric safety switches and the machine controller. It makes it possible to connect up to 4 sensor pairs (sender/receiver combination) or up to 8 cascaded sensor pairs. Color LEDs provide local information about the operational status. Quickly see diagnostic data using status and error messages on the 7-segment display of the UE401 safety evaluation unit . Even complex protection tasks can be performed due to the ability to connect up to 8 sensor pairs, a range of versions that can be selected according to requirements, suitability for outdoor applications and the use of deflector mirrors.

At a glance
  • Type 4 (IEC 61496), SIL3 (IEC 61508), PL e (EN ISO 13849), only in conjunction with UE401
  • Small M18 sensors with ranges up to 10 m
  • Compact M30 sensors with ranges up to 60 m
  • Enclosure rating IP 67
  • Temperature range from –20 °C ... 55 °C
  • Narrow evaluation device (22.5 mm) with external device monitoring (EDM) and restart interlock (RES)
  • Fast response time of max. 30 ms
  • Up to 8 sensors can be cascaded



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Technical overview

  • Technical data overview

    Technical data overview

    Scanning range0 m ... 60 m
    Light sender/type of lightLED / visible red light
    Construction sizeM18 / M30,
    107.7 mm
    97.7 mm
    100 mm
    Supply voltage24 V DC (19.2 V DC ... 28.8 V DC)
    Enclosure ratingIP67 (EN 60529)
    Ambient operating temperature–20 °C ... +55 °C
    TypeType 4 (IEC 61496-1) 1)
    Performance levelPL e (EN ISO 13849) 1)
    • 1) Only in conjunction with UE401.
All technical data can be found accompanying the individual product