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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

  • M
    merrittkevinSep 8, 2025
    What to do if receiver is set on C1 and transmitter on C2 for Leuze electronic MLC 520 Security Sensors?
    • K
      kentayalaSep 8, 2025
      Set the transmitter and receiver on the same transmission channel and align both correctly.
  • C
    Christopher AndradeSep 7, 2025
    How to troubleshoot OSSD error, source unknown in Leuze electronic MLC 520 Security Sensors?
    • S
      Samantha StevensonSep 7, 2025
      Check the wiring. Replace the cable and the receiver if necessary.
  • K
    Katie ChenAug 22, 2025
    What to do if alignment is incorrect or protective field interrupted in Leuze electronic Security Sensors?
    • H
      Henry JohnsonAug 22, 2025
      If the alignment is incorrect or the protective field is interrupted, remove any objects obstructing the protective field. Ensure the transmitter and receiver are correctly aligned, or reposition any blanked objects to their correct size and position.
  • R
    Robin WheelerSep 4, 2025
    What to do if there is a short circuit against GND at OSSD2 in Leuze electronic MLC 520?
    • J
      jfisherSep 4, 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.
  • C
    Charles AdamsSep 2, 2025
    What to do if there is short circuit against GND at OSSD1 in Leuze electronic MLC 520 Security Sensors?
    • B
      Beth GordonSep 2, 2025
      Check the wiring. Exchange the cable, if applicable.
  • H
    Heather SmithAug 31, 2025
    How to fix high-impedance short circuit to VCC OSSD2 in Leuze electronic MLC 520?
    • J
      James MooreAug 31, 2025
      Check the wiring and replace the cable if needed.
  • A
    Amy SimpsonAug 30, 2025
    How to fix high-impedance short circuit to VCC OSSD1 in Leuze electronic MLC 520 Security Sensors?
    • A
      Amanda SchmidtAug 30, 2025
      Check the wiring and exchange the cable, if necessary.
  • S
    stevenbernardAug 29, 2025
    What to do if the operating mode changed for Leuze electronic MLC 520?
    • J
      Jessica LeeAug 29, 2025
      Check the wiring and restart the sensor.
  • 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.

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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