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Leuze electronic MLC 520 - User Manual

Leuze electronic MLC 520
65 pages
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S A F E I M P L E M E N T A T I O N A N D O P E R A T I O N
O r i g i n a l o p e r a t i n g i n s t r u c t i o n s
EN 2015/12 - 700191
We reserve the right to
make technical changes
MLC 520
Safety Light Curtains

Table of Contents

Questions and Answers

  • E
    ewhiteSep 23, 2025
    What causes invalid change of operating mode due to reversal of the supply voltage polarity during operation in Leuze electronic Security Sensors?
    • R
      Rodney AndrewsSep 23, 2025
      Check the wiring and programming of the device which controls this signal.
  • J
    Jeffrey SmithAug 23, 2025
    Why is the signal weak on my Leuze electronic Security Sensors due to contamination or poor alignment?
    • P
      plaraAug 23, 2025
      A weak signal could be due to contaminated front screens or poor alignment between the transmitter and receiver. Clean the front screens and check the alignment of the transmitter and receiver to resolve this issue.
  • K
    kenneth53Aug 25, 2025
    What to do if Leuze electronic MLC 520 device failed?
    • T
      Timothy ScottAug 26, 2025
      If the device has failed, replace it.
  • M
    Michelle WatkinsAug 27, 2025
    How to troubleshoot external fault in Leuze electronic MLC 520?
    • M
      Megan CaldwellAug 27, 2025
      Check the connection of the cables and the control signals.
  • J
    Judy MurphyAug 27, 2025
    What to do for internal fault in Leuze electronic MLC 520 Security Sensors?
    • H
      heather49Aug 28, 2025
      If a restart fails, replace the device.
  • G
    Gregory KennedySep 16, 2025
    What to do if EDM operating mode changed during operation of Leuze electronic Security Sensors?
    • K
      Kevin EricksonSep 16, 2025
      Check the correctness of the selected operating mode, correct the operating mode if required, and restart.
  • A
    Amy HamiltonSep 13, 2025
    What to do if EDM does not open in Leuze electronic MLC 520?
    • L
      Laura DennisSep 13, 2025
      Actuate the start button if available.
  • C
    Courtney JenkinsSep 14, 2025
    What to do if EDM does not close in Leuze electronic Security Sensors?
    • J
      Jack HudsonSep 15, 2025
      Actuate the start button if available.
  • E
    eric53Sep 5, 2025
    What to do if there is a short circuit against +24 V at OSSD2 in Leuze electronic MLC 520 Security Sensors?
    • S
      Sarah VargasSep 5, 2025
      Check the wiring. Exchange the cable, if applicable.
  • E
    elliottdawnSep 3, 2025
    What to do if there is short circuit against +24 V at OSSD1 in Leuze electronic MLC 520?
    • C
      Caleb OwensSep 3, 2025
      Check the wiring. Exchange the cable, if applicable.

Summary

Safety

Approved purpose and foreseeable improper operation

Defines correct usage and potential misuse of the safety sensor to ensure safe operation.

Competent persons

Outlines the qualifications and responsibilities of personnel involved with the safety sensor.

Responsibility for safety

Details the safety responsibilities of machine manufacturers and operating companies.

Functions

Start;restart interlock RES

Explains the mandatory safety function for preventing unintended restarts after interruptions.

EDM contactor monitoring

Describes the function for monitoring external contactors for safety.

Applications

Point of operation guarding

Describes using the sensor for hand/finger protection at machine operation points.

Mounting

Arrangement of transmitter and receiver

Guidelines for positioning the transmitter and receiver for correct operation.

Calculation of safety distance S

Formula and parameters for calculating the required safety distance according to EN ISO 13855.

Calculation of safety distance if protective fields act orthogonally to the approach direction

How to calculate safety distance for different approach directions.

Calculation of safety distance SRT for access guarding

Specific calculation for safety distance in access guarding scenarios.

Calculation of safety distance SRO acc. to EN ISO 13855 when protective field is accessed from above

Formula for safety distance when accessing the protective field from above.

Calculation of safety distance S for parallel approach to the protective field

Calculation for parallel approach in danger zone guarding.

Minimum distance to reflective surfaces

Guidelines on maintaining distances to reflective surfaces to prevent false triggers.

Preventing mutual interference between adjacent devices

Methods to prevent optical crosstalk and interference between multiple sensors.

Electrical connection

Pin assignment transmitter and receiver

Details the pin assignments for transmitter and receiver connectors.

MLC 520 receiver

Details the pin assignments and connection diagram for the MLC 520 receiver.

MLC 520 circuit diagram example

Illustrates a typical circuit diagram for connecting the MLC 520.

Starting up the device

Unlocking start;restart interlock

How to safely unlock the start/restart interlock after interruptions.

Testing

Before the initial start-up and following modifications

Tests required before initial use and after modifications to the system.

Checklist for integrator - to be performed prior to the initial start-up and following modifications

A checklist for integrators to verify proper installation and setup.

To be performed periodically by competent persons

Periodic testing requirements for qualified personnel to ensure reliability.

Periodically by the operator

Regular function checks to be performed by trained operators.

Troubleshooting

What to do in case of failure?

General guide for diagnosing and resolving device failures using indicators.

Technical data

Safety-relevant technical data

Technical data related to safety standards like PL, SIL, and category.

Ordering information and accessories

Leuze electronic MLC 520 Specifications

General IconGeneral
BrandLeuze electronic
ModelMLC 520
CategorySecurity Sensors
LanguageEnglish

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