Leuze electronic MLC 520 Operating Instructions Manual
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Leuze electronic MLC 520 Operating Instructions Manual

Safety light curtains
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MLC 520
Safety Light Curtains
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

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  • Page 1 MLC 520 Safety Light Curtains 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...
  • Page 2 © 2015 Leuze electronic GmbH & Co. KG In der Braike 1 D-73277 Owen / Germany Phone: +49 7021 573-0 Fax: +49 7021 573-199 http://www.leuze.com info@leuze.de Leuze electronic MLC 520...

  • Page 3: Table Of Contents

    6.3.1 Deflecting mirror for multiple-side guarding ................ 31 6.3.2 MLC-PS protective screen .................... 33 Electrical connection.................. 34 Pin assignment transmitter and receiver ................ 34 7.1.1 MLC 500 transmitter ...................... 34 7.1.2 MLC 520 receiver .........................  36 Circuit diagram examples .....................  37 Leuze electronic MLC 520...
  • Page 4 11.3 Error messages 7-segment display .................. 47 Disposing...................... 50 Service and support ................... 51 Technical data ..................... 52 14.1 General specifications ...................... 52 14.2 Dimensions, weight, response time .................. 54 14.3 Dimensional drawings: Accessories .................. 56 Ordering information and accessories ............. 59 EC Declaration of Conformity................ 65 Leuze electronic MLC 520...

  • Page 5: About This Document

    Brief description of the safety sensor, consisting of transmitter and receiver MTTF Mean time to dangerous failure (Mean Time To dangerous Failure) OSSD Safety-related switching output (Output Signal Switching Device) Probability of a dangerous failure per hour (Probability of dangerous Failure per Hour) Performance Level Leuze electronic MLC 520...

  • Page 6: Checklists

    They replace neither testing of the complete machine or system prior to the initial start-up nor their periodic testing by a competent person. The checklists contain minimum testing requirements. Depending on the application, other tests may be necessary. Leuze electronic MLC 520...

  • Page 7: Safety

    • The construction of the safety sensor must not be altered. When manipulating the safety sensor, the protective function is no longer guaranteed. Manipulating the safety sensor also voids all warranty claims against the manufacturer of the safety sensor. Leuze electronic MLC 520...

  • Page 8: Foreseeable Misuse

    • Reasonably foreseeable misuse is not taken into account. • Mounting and electrical connection are not properly performed. • Proper function is not tested (see chapter 9 "Testing"). • Changes (e.g., constructional) are made to the safety sensor. Leuze electronic MLC 520...

  • Page 9: Device Description

    NOTICE Depending on the resolution, the effective protective field height can be larger than the optically active area of the safety sensor housed in yellow (see chapter 3.1 "Device overview" and see chapter 14.1 "General specifications"). Leuze electronic MLC 520...

  • Page 10: Connection Technology

    Fig. 3.2: QR code with corresponding web address (URL) on the safety sensor Connection technology The transmitter and receiver feature an M12 connector as an interface to the machine control with the fol- lowing number of pins: Leuze electronic MLC 520...

  • Page 11: Display Elements

    Transmission channel C1 Transmission channel C2 3.3.2 Operating indicators on the MLC 520 receiver Two LEDs and a 7-segment display for showing the operating state are located on the receiver: Leuze electronic MLC 520...
  • Page 12 (see chapter 8.2 "Aligning the sensor"). Tab. 3.4: Meaning of the 7-segment display Display Description After switching on Self test t n n Response time (t) of the receiver in milliseconds (n n) In normal operation Transmission channel C1 Transmission channel C2 Leuze electronic MLC 520...

  • Page 13: Alignment Display

    At least one, but not all beams in the beam area are uninterrupted. Switched off All beams in the beam area are interrupted. When the protective field has been free for about 5 s, the device switches back to the display of the operat- ing mode. Leuze electronic MLC 520...

  • Page 14: Functions

    Ä Ensure that the reset button for unlocking the start/restart interlock cannot be reached from the danger zone. Ä Before unlocking the start/restart interlock, make certain that no people are in the danger zone. After the reset button has been actuated, the safety sensor switches to the ON state. Leuze electronic MLC 520...

  • Page 15: Edm Contactor Monitoring

    The transmission channel of the receiver can be switched by changing the supply voltage polarity (see chapter 7.1.2 "MLC 520 receiver"). NOTICE Faulty function due to incorrect transmission channel! Select the same transmission channel on the transmitter and corresponding receiver. Leuze electronic MLC 520...

  • Page 16: Range Reduction

    Ä Do not use this configuration option for safety purposes. Ä Note that the distance to reflective surfaces must always be selected so that no reflection bypass can occur even at maximum transmitting power (see chapter 6.1.4 "Minimum dis- tance to reflective surfaces"). Leuze electronic MLC 520...

  • Page 17: Applications

    (see chapter 6.1.1 "Calculation of safety distance S"). Fig. 5.1: Point of operation guarding protects reaching into the danger zone, e.g. for cartoners or filling systems Fig. 5.2: Point of operation guarding protects reaching into the danger zone, e.g. for a pick & place robot applica- tion Leuze electronic MLC 520...

  • Page 18: Access Guarding

    Depending on the mounting height, resolutions of 40 or 90 mm are used (see chapter 15 "Ordering information and accessories"). Fig. 5.4: Danger zone guarding on a robot Leuze electronic MLC 520...

  • Page 19: Mounting

    Approach speed Total time of the delay, sum from (t  + t  + t Response time of the protective device Response time of the safety relay Stopping time of the machine [mm] Additional distance to the safety distance Leuze electronic MLC 520...

  • Page 20: Calculation Of Safety Distance If Protective Fields Act Orthogonally To The Approach Direction

    500 mm; this is why the calculation may not be repeated with 1600 mm/s. NOTICE Implement the stepping behind protection required here, e.g., through the use of an additional or cascaded safety sensor for area protection. Leuze electronic MLC 520...
  • Page 21 1600 mm/s × 0.264 s + 208 mm [mm] The safety light curtain with a 40 mm resolution is thus suitable for this application. NOTICE For the calculation with K = 2000 mm/s, safety distance S equals 736 mm. The adoption of ap- proach speed K = 1600 mm/s is therefore permitted. Leuze electronic MLC 520...
  • Page 22 Height b of the upper edge of the protective field of the electro-sensitive protective the point of equipment operation 1000 1100 1200 1300 1400 1600 1800 2000 2200 2400 2600 [mm] Additional distance C to the danger zone [mm] 2600 2500 2400 2200 Leuze electronic MLC 520...
  • Page 23 ð In this line, go to the left column: here you will find the permitted height of the point of operation. Ä Now calculate safety distance S using the general formula acc. to EN ISO 13855 (see chapter 6.1.1 "Calculation of safety distance S"). ð The larger of the two values S and S is to be used. Leuze electronic MLC 520...

  • Page 24: Calculation Of Safety Distance S For Parallel Approach To The Protective Field

    Stopping time of the machine [mm] Additional distance for danger zone guarding with approach reaction H = height of the protec- tive field, H  = minimum installation height permitted, but no smaller than 0, d = resolution of the protective device C = 1200 mm - 0.4 × H; H  = 15 × (d - 50) Leuze electronic MLC 520...

  • Page 25: Minimum Distance To Reflective Surfaces

    Ä Check that reflective surfaces do not impair the detection capability of the safety sensor be- fore start-up and at appropriate intervals. 4° 4° Required minimum distance to reflective surfaces [mm] Protective field width [m] Leuze electronic MLC 520...

  • Page 26: Preventing Mutual Interference Between Adjacent Devices

    6.1.5 Preventing mutual interference between adjacent devices If a receiver is located in the beam path of an adjacent transmitter, optical crosstalk, and thus erroneous switching and failure of the protective function, may result. Leuze electronic MLC 520...
  • Page 27 Ä Mount the adjacent devices opposite from one another to prevent mutual interference. Receiver 1 Transmitter 1 Transmitter 2 Receiver 2 Fig. 6.5: Opposite mounting In addition to design characteristics, the safety sensor offers functions that can remedy this: • Selectable transmission channels (see chapter 4.3 "Transmission channel changeover") Leuze electronic MLC 520...

  • Page 28: Mounting The Safety Sensor

    Can the entire danger zone be seen from the installation site of the reset button? Can reflection caused by the installation site be ruled out? NOTICE If you answer one of the items on the checklist above with no, the mounting location must be changed. Leuze electronic MLC 520...

  • Page 29: Definition Of Directions Of Movement

    • Turning by 360° around the longitudinal axis by fixing on the screw-on cone • Pitching in the direction of the protective field with horizontal threaded holes in the wall mounting • Tilting around main axis Leuze electronic MLC 520...

  • Page 30: Fastening Via Swiveling Mounting Brackets

    The full resolution of the safety sensor is thus preserved on all points of the protective field down to the machine table. Leuze electronic MLC 520...

  • Page 31: Mounting Accessories

    Deflecting mirror for multiple-side guarding For multiple-side guarding, redirecting the protective field with one or two deflecting mirrors is economical. To do this, Leuze electronic supplies: • The UM60 deflecting mirror for mounting on the machine in various lengths (see chapter 15 "Ordering information and accessories")
  • Page 32 UM60 deflecting mirror Fig. 6.11: Arrangement with deflecting mirror for 2-side guarding of a point of operation Transmitter Receiver UMC deflecting mirror column Fig. 6.12: Arrangement with deflecting mirror columns for two-side guarding of a point of operation Leuze electronic MLC 520...

  • Page 33: Mlc-Ps Protective Screen

    10%. Mounting bracket sets with 2 and 3 clamp brackets are available. NOTICE If the length equals 1200 mm or higher, 3 clamp brackets are recommended. Fig. 6.13: MLC-PS protective screen fastened with MLC-2PSF clamp bracket Leuze electronic MLC 520...

  • Page 34: Electrical Connection

    Pin assignment and connection diagram transmitter Tab. 7.1: Pin assignment transmitter Core color (CB-M12-xx000E-5GF) Transmitter Brown VIN1 - supply voltage White n.c. Blue VIN2 - supply voltage Black RNG - range Gray FE - functional earth, shield Leuze electronic MLC 520...
  • Page 35 MLCx00T MLCx00T + 24V + 24V + 24V + 24V MLCx00T MLCx00T Transmission channel C1, reduced range Transmission channel C1, standard range Transmission channel C2, reduced range Transmission channel C2, standard range Fig. 7.2: Connection examples transmitter Leuze electronic MLC 520...

  • Page 36: Mlc 520 Receiver

    FE - functional earth, shield Wired in device interior on the housing FE - functional earth, shield The polarity of the supply voltage selects the transmission channel of the receiver: • VIN1 = +24 V, VIN2 = 0 V: transmission channel C1 • VIN1 = 0 V, VIN2 = +24 V: transmission channel C2 Leuze electronic MLC 520...

  • Page 37: Circuit Diagram Examples

    Electrical connection Circuit diagram examples 7.2.1 MLC 520 circuit diagram example +24V +24V MLCx00T MLCx20R MSI-RM2 Fig. 7.4: Circuit diagram example with downstream MSI-RM2 safety relay Leuze electronic MLC 520...

  • Page 38: Starting Up The Device

    Alignment can be performed with a clear protective field by observing the LEDs and the 7-segment display (see chapter 3.3 "Display elements"). Ä Loosen the screws on the mounting brackets or device columns. Leuze electronic MLC 520...

  • Page 39: Aligning Of Deflecting Mirrors With The Laser Alignment Aid

    The laser beam must strike the transmitter in both cases if the receiver has been correctly aligned. Ä Remove the laser alignment aid from the safety sensor. ð The protective field is free. LED1 on the receiver is permanently lit green. The OSSDs switch on. Leuze electronic MLC 520...

  • Page 40: Unlocking Start/Restart Interlock

    • Starting at 4 s: the reset request is ignored. • Starting at 30 s: a +24 V short circuit is assumed on the reset input and the receiver switches to the in- terlock state (see chapter 11.1 "What to do in case of failure?"). Leuze electronic MLC 520...

  • Page 41: Testing

    (see chapter 14 "Technical data")? Is the safety sensor correctly aligned and are all fastening screws and connectors secure? Are safety sensor, connection cables, connectors, protection caps and command devices undamaged and without any sign of manipulation? Leuze electronic MLC 520...
  • Page 42 Are settings that could result in an unsafe state possible only by means of key, password or tool? Are there incentives that pose stimulus for tampering? Were the operators instructed prior to starting work? Leuze electronic MLC 520...

  • Page 43: To Be Performed Periodically By Competent Persons

    Checklist – regular function test by trained operators/persons Test at least: Are safety sensor and connectors securely mounted and free of obvious signs of damage, changes or tampering? Were obvious changes made to access or entry possibilities? Leuze electronic MLC 520...
  • Page 44 – are the obviously dangerous machine parts stopped with- out noticeable delay? Protective device with presence detection: the protective field is interrupted with the test object – does this prevent operation of the obviously dangerous machine parts? Leuze electronic MLC 520...

  • Page 45: Maintenance

    • The system is safely shut down and protected against restart. Ä Clean the safety sensor periodically depending on the degree of contamination. NOTICE Prevent electrostatic charging of the front screens! Ä To clean the front screens of transmitter and receiver, use only damp cloths. Leuze electronic MLC 520...

  • Page 46: Troubleshooting

    LED indicators at the transmitter - causes and measures State Cause Measure LED1 Transmitter without supply Check the power supply unit and the elec- voltage trical connection. Exchange the power supply unit, if applicable. Device failed Replace the device. Leuze electronic MLC 520...

  • Page 47: Error Messages 7-Segment Display

    Very high overvoltage (± 40 V) Supply the device with the correct voltage. Cross connection between Check the wiring between OSSD1 Automatic reset OSSD1 and OSSD2 and OSSD2. Overload on OSSD1 Check the wiring or exchange the Automatic reset connected component (reducing the load). Leuze electronic MLC 520...
  • Page 48 Signal output: output sig- nal is not equal to the signal in- put read-back value: it switches simultaneously with the other signal line. EDM does not open Actuate the start button if avail- Locking able. Leuze electronic MLC 520...
  • Page 49 Invalid operating mode due to E.g. reset button pressed during Locking setting error, general operating start-up, check the circuit diagram mode change and the wiring and restart. Operating mode changed Check the wiring. Restart the sen- Locking sor. Leuze electronic MLC 520...

  • Page 50: Disposing

    Disposing Disposing Ä For disposal observe the applicable national regulations regarding electronic components. Leuze electronic MLC 520...

  • Page 51: Service And Support

    +49 (0) 7021 573-0 Service hotline: +49 (0) 8141 5350‑111 Monday to Thursday, 8.00 a.m. to 5.00 p.m. (UTC+1) Friday, 8.00 a.m. to 4.00 p.m. (UTC+1) E-mail: service.protect@leuze.de Return address for repairs: Servicecenter Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen/Germany Leuze electronic MLC 520...

  • Page 52: Technical Data

    Optical between transmitter and receiver Safety class Degree of protection IP 65 Temperature range, operation 0 … 55 °C Temperature range, storage -25 … 70 °C Relative humidity (non-condensing) 0 … 95 % Vibration resistance 50 m/s acceleration, 10 - 55 Hz in acc. with IEC/ EN 60068-2-6; 0.35 mm amplitude Leuze electronic MLC 520...
  • Page 53 Technical data of the electronic safety-related switching outputs (OSSDs) on the receiver Safety-related PNP transistor outputs Minimum Typical Maximum (short-circuit monitored, cross-circuit monitored) Switching voltage high active (U  - 1.5V) 18 V 22.5 V 27 V Switching voltage low 0 V +2.5 V Switching current 300 mA 380 mA Leuze electronic MLC 520...

  • Page 54: Dimensions, Weight, Response Time

    (RC elements, varistors or recovery diodes), since these con- siderably extend the decay times of inductive switching elements. 14.2 Dimensions, weight, response time Dimensions, weight and response time are dependent on • the resolution • the length Leuze electronic MLC 520...
  • Page 55 Dimensions (nominal protective field height), weight and response time Device type Transmitter and receiver Receiver Dimensions [mm] Weight [kg] Response time [ms] acc. to resolution Model 14 mm 20 mm 30 mm 40 mm 90 mm MLC…-150 0.30 MLC…-225 0.37 MLC…-300 0.45 MLC…-450 0.60 Leuze electronic MLC 520...

  • Page 56: Dimensional Drawings: Accessories

    MLC…-2100 2100 2166 2.25 MLC…-2250 2250 2316 2.40 MLC…-2400 2400 2466 2.55 MLC…-2550 2550 2616 2.70 MLC…-2700 2700 2766 2.85 MLC…-2850 2850 2916 3.00 MLC…-3000 3000 3066 3.15 14.3 Dimensional drawings: Accessories Fig. 14.2: BT-L mounting bracket Leuze electronic MLC 520...
  • Page 57 Technical data 12.1 10.8 Fig. 14.3: BT-Z parallel bracket Ø 6,2 Ø 6,2 Ø Ø Ø Ø Fig. 14.4: Swivel mount BT-2HF Fig. 14.5: BT-P40 clamp bracket for mounting in UDC device columns Leuze electronic MLC 520...
  • Page 58 Technical data 20,5 Ø 5,3 (2x) Ø 5,3 (2x) Fig. 14.6: Swiveling mounting bracket BT-2SB10 Leuze electronic MLC 520...

  • Page 59: Ordering Information And Accessories

    EX2: explosion protection (zones 2 + 22) /V: high Vibration-proof Tab. 15.2: Part designations, examples Examples for part desig- Features nation MLC500T14-600 Type 4 transmitter, PL e, SIL 3, resolution 14 mm, protective field height 600 mm MLC500T30-900 Type 4 transmitter, PL e, SIL 3, resolution 30 mm, protective field height 900 mm Leuze electronic MLC 520...
  • Page 60 40 mm 90 mm height hhhh MLC520R14- MLC520R20- MLC520R30- MLC520R40- MLC520R90- [mm] hhhh hhhh hhhh hhhh hhhh 68002101 68002201 68002301 68002401 68002202 68002302 68002402 68002103 68002203 68002303 68002403 68002104 68002204 68002304 68002404 68002904 68002106 68002206 68002306 68002406 68002906 Leuze electronic MLC 520...
  • Page 61 68000139 68000339 Tab. 15.6: Part numbers of MLC 520/V receiver depending on resolution and protective field height Protective field height hhhh 14 mm 30 mm [mm] MLC520R14-hhhh MLC520R30-hhhh 68002131 68002331 68002133 68002333 68002134 68002334 68002136 68002336 68002137 68002337 68002139 68002339 Leuze electronic MLC 520...
  • Page 62 CB-M12-50000-8GF Connection cable, 8-pin, 50 m long User-configurable connectors for MLC 500 transmitter 429175 CB-M12-5GF Cable socket, 5-pin, metal housing, shield on housing User-configurable connectors for MLC 520 receiver 429178 CB-M12-8GF Cable socket, 8-pin, metal housing, shield on housing Mounting technology 429056 BT-2L L mounting bracket, 2 x...
  • Page 63 347076 MLC-PS900 Protective screen, length 898 mm 347077 MLC-PS1050 Protective screen, length 1048 mm 347078 MLC-PS1200 Protective screen, length 1198 mm 347079 MLC-PS1350 Protective screen, length 1348 mm 347080 MLC-PS1500 Protective screen, length 1498 mm 347081 MLC-PS1650 Protective screen, length 1648 mm Leuze electronic MLC 520...
  • Page 64 Mounting device for MLC protective screen, 3 x Laser alignment aids 560020 LA-78U External laser alignment aid 520004 LA-78UDC External laser alignment aid for fastening in De- vice Column Test rods 349945 AC-TR14/30 Test rod 14/30 mm 349939 AC-TR20/40 Test rod 20/40 mm Leuze electronic MLC 520...

  • Page 65: Ec Declaration Of Conformity

    Liebigstr. 4; 82256 Fuerstenfeldbruck; Germany Datum / Date / Date Ulrich Balbach, Geschäftsführer / Director / Directeur Leuze electronic GmbH + Co. KG, Sitz Owen, Registergericht Stuttgart, HRA 230712 2014/10 Leuze electronic GmbH + Co. KG Persönlich haftende Gesellschafterin Leuze electronic Geschäftsführungs-GmbH,...

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