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Summary of Contents for Leuze MLD 531
- Page 1 Original operating instructions MLD 531 Multiple light beam safety devices SAFE IMPLEMENTATION AND OPERATION We reserve the right to make technical changes EN 2024/01/16 - 50147363...
- Page 2 © 2024 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 GmbH + Co. KG MLD 531...
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Page 3: Table Of Contents
6.3.4 BT-2SB10 clamp swiveling mounting bracket (optional) ....... . . 35 Leuze electronic GmbH + Co. KG... - Page 4 Declaration of Conformity..........75 Leuze electronic GmbH + Co. KG...
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Page 5: About This Document
(see chapter 2.2). The checklists contain minimum testing requirements. Depending on the application, other tests may be necessary. Leuze electronic GmbH + Co. KG MLD 531... -
Page 6: Safety
• In environments in which the product is in direct contact with water • In environments in which fogging and ice can form on the front screen of the device The following table shows the safety-related characteristic parameters of the MLD 500 series. Leuze electronic GmbH + Co. KG MLD 531... -
Page 7: Foreseeable Misuse
Mounting Specialist knowledge and experience needed for the safe and correct installation and alignment of the safety sensor with regard to the respective machine. Leuze electronic GmbH + Co. KG MLD 531... -
Page 8: Responsibility For Safety
• Periodic testing by a competent person (see chapter 2.2 "Necessary competencies") Exemption of liability Leuze electronic GmbH + Co. KG is not liable in the following cases: • Safety sensor is not used as intended. • Safety notices are not adhered to. -
Page 9: Device Description
(e.g. welding sparks, warning lights) and, thus, not be affected by Device overview The following table provides an overview of the functions of the MLD 531 device model of the MLD 500 series. Table 3.1:... -
Page 10: Connection Technology
Description Green Transmitted beam active Error (transmitted beam inactive) The receiver has a LED (LED1, red or green). The devices of the MLD 531 model have the following addi- tional display elements: • LED2 (yellow) • 7-segment display • Muting indicators (optional) Leuze electronic GmbH + Co. -
Page 11: 7-Segment Display At The Transceiver
(see chapter 11). For the identification of the error, the error's respective letter is displayed first followed by the number code. The display is repeated cyclically. An AutoReset is carried out after 10 s, with an unauthorized restart being impossible. Leuze electronic GmbH + Co. KG MLD 531... -
Page 12: Multicolor Indicator
A muting error is signalized by flashing (see table 11.1). Table 3.6: Multicolor indicator Color Meaning Green OSSD on OSSD off Yellow/red, alternating Restart locked White Muting Leuze electronic GmbH + Co. KG MLD 531... - Page 13 Device description Muting indicators Beam marking Figure 3.5: Muting indicator on the transceiver Leuze electronic GmbH + Co. KG MLD 531...
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Page 14: Functions
Muting targeted, proper bridging of the protective function Periodic function test safety-related; initiated and tested, e.g. by an external safety monitoring device Table 4.2: Functions of the MLD 531 model Function MLD 531 OSSDs Automatic start/restart ... -
Page 15: Signal Output
These short signal interruptions are, therefore, filtered out for up to max. 3 s. If both muting sensors are inactive simultaneously, timing controlled 2-sensor muting ends after the filter time has elapsed. Leuze electronic GmbH + Co. KG MLD 531... -
Page 16: Sequence Controlled 2-Sensor Muting (Exit)
300 ms. WARNING! Risk of death by through incorrect arrangement of the muting sensors! Only select sequence controlled 2-sensor muting for material exits (see chapter 6.2.5). Leuze electronic GmbH + Co. KG MLD 531... -
Page 17: Muting Timeout
In the standard operating modes, the time frame for the muting timeout is set to 10 sec and muting is auto- matically ended after this time elapses (the protective function is active again). A muting-timeout extension and a muting enable must not be used for devices of the MLD 531 model. 4.5.4 Muting restart Following a muting error (e.g. -
Page 18: Muting Operating Modes
Operating mode 5 cannot be used with the MLD 531 device models. Operating mode 6 (partial muting) cannot be used on transceiver systems of the MLD 531 device models. Leuze electronic GmbH + Co. KG... -
Page 19: Applications
Figure 5.1: 3-beam guarding for exits from danger zones Figure 5.2: 3-beam guarding with transceiver system for an application with palletizing robot Leuze electronic GmbH + Co. KG MLD 531... - Page 20 Applications Figure 5.3: Access guarding with timing controlled 2-sensor muting for an application with a pallet wrap- ping machine Leuze electronic GmbH + Co. KG MLD 531...
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Page 21: Mounting
= Total time of the delay [mm] = 850 mm (default value for arm length) Calculate the safety distance S for access guarding using the formula acc. to EN ISO 13855: Leuze electronic GmbH + Co. KG MLD 531... -
Page 22: Calculation Of The Safety Distance For Vertical Protective Fields With Reaching Over
: stopping time of the machine [mm] = Value see table 6.2 (Additional distance in which a body part can move towards the pro- tective device before the protective device triggers) Leuze electronic GmbH + Co. KG MLD 531... - Page 23 [mm] 2600 2500 2400 2200 2000 1800 1100 1100 1600 1150 1150 1100 1000 1400 1200 1200 1100 1000 1200 1200 1200 1100 1000 1000 1200 1150 1050 1150 1050 1050 Leuze electronic GmbH + Co. KG MLD 531...
- Page 24 The height of the upper beam is now 900 mm. All other parameters remain the same. C = 1050 mm (see table 6.2). Leuze electronic GmbH + Co. KG MLD 531...
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Page 25: Minimum Distance To Reflective Surfaces
Minimum distance to reflective surfaces depending on protective field width Required minimum distance to reflective surfaces [mm] Protective field width [m] Figure 6.3: Minimum distance to reflective surfaces as a function of the protective field width up to 10 m Leuze electronic GmbH + Co. KG MLD 531... -
Page 26: Preventing Mutual Interference Between Adjacent Devices
Prevent optical crosstalk between adjacent devices. Mount adjacent devices with a shield between them or install a dividing wall to prevent mutual interfer- ence. Leuze electronic GmbH + Co. KG MLD 531... -
Page 27: Arrangement Of The Muting Sensors
Risk of death through inadequate protection of the muting sensors! Protection against unintentional initiation of the (permanent) bridging function through mechanical damage and/or misalignment of muting sensors (acc. to IEC 62046). Leuze electronic GmbH + Co. KG MLD 531... -
Page 28: Selecting Optoelectronic Muting Sensors
If the AC-SCMx sensor connection box is not used, it must be ensured that muting cannot be triggered by a ground fault or the interruption of the signal lines or power supply of the muting sensors. You can find an overview of suitable Leuze muting sensors in chapter "Order guide and acces- sories"(see chapter 15). 6.2.3... - Page 29 Distance between transported goods and hard guard Distance d5 200 mm and as small as practical [mm] Distance from the intersection point of the muting-sensor light beams to the protective-field plane Leuze electronic GmbH + Co. KG MLD 531...
- Page 30 This prevents—or hinders—manipulation with the feet since the protective field is interrupted before the muting-sensor light beam. NOTE To increase safety and make manipulation more difficult, MS1 and MS2 should, if possible, be mounted at different heights (i.e. no point-shaped intersection of the light beams). Leuze electronic GmbH + Co. KG MLD 531...
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Page 31: Arrangement Of The Muting Sensors For Sequence Controlled 2-Sensor Muting
However, if it is assumed that persons are located here, the risk of crushing must be prevented, e.g. with wicket gates, which are integrated electrically into the safety circuit. Distance a, b a, b 200 mm a, b [mm] Distance between transported goods and hard guard Leuze electronic GmbH + Co. KG MLD 531... -
Page 32: Mounting The Safety Sensor
• Have a suitable tool at hand and mount the safety sensor in accordance with the notices regarding the mounting locations (see chapter 6.3.1). • If possible, affix safety notice stickers on the mounted safety sensor or device column. Leuze electronic GmbH + Co. KG MLD 531... -
Page 33: Suitable Mounting Locations
Two models are available: BT-SET-240B with counterholder (for transmitter and receiver, top) and BT-SET-240C with clamping ring (for transmitter and receiver, connection side or for deflecting mirror top/bottom). Leuze electronic GmbH + Co. KG MLD 531... -
Page 34: Bt-P40 Clamp Bracket (Optional)
The BT-P40 clamp brackets are also available in device columns DC/UDC-...-S1 for mounting with sliding blocks. The clamp brackets can be used to flexibly adjust the safety sensor in height and secure its vertical position. Leuze electronic GmbH + Co. KG MLD 531... -
Page 35: Bt-2Sb10 Clamp Swiveling Mounting Bracket (Optional)
Depending on the installation situation, the MLD with bracket can be mounted either on the sensor back or side. For increased mechanical requirements, the brackets are also available in vibration-damping form (BT-2SB10-S). Figure 6.14: BT-2SB10 clamp swiveling mounting bracket Leuze electronic GmbH + Co. KG MLD 531... -
Page 36: Electrical Connection
7.1.1 Standard pin assignment The transceivers of the MLD 531 models are equipped with an 8-pin M12 connector and an additional 5-pin socket. The 5-pin socket is used for connecting the signals of the muting sensors. Alternatively, the sensors can be directly connected via the AC-SCMx connection box. The socket is A-coded. -
Page 37: Pin Assignment Of Local Socket
OSSD1 +24 V The operating mode for device model MLD 531 is dependent on the pin assignment of the 8-pin plug and can be changed when the device is in a de-energized state. On device start-up, the software determines the parameters that have been set in this way. -
Page 38: Selecting The Muting Operating Modes
EDM is not possible in operating mode 4 Selecting the muting operating modes In addition to EDM and RES, devices of the MLD 531 model also feature the following functions: • Shortened muting timeout 10 sec • Muting signal 2 as control signal (MS2 can also be connected to the 8-pin plug here) •... -
Page 39: Operating Mode 2
/HX]H /HX]H 0/'0[ 0/'57[0 2SHUDWLQJ 0RGH 0/';0[ Figure 7.3: Connection example of MLD 531 transceiver system: timing controlled 2-sensor muting with muting timeout 10 sec 7.3.2 Operating mode 2: • Start/restart interlock is selected • Contactor monitoring is selectable •... -
Page 40: Operating Mode 3
0/'0[ 0/'57[0 2SHUDWLQJ 0RGH . 0/';0[ . Figure 7.4: Connection example MLD 531 (transceiver system): timing controlled 2-sensor muting with muting timeout 10 sec 7.3.3 Operating mode 3: • Start/restart interlock is selected • Contactor monitoring is selectable • Second muting signal can be connected via the machine interface (i.e. signal comes from the con- trol) Leuze electronic GmbH + Co. -
Page 41: Operating Mode 4
0/'0[[ 0/'57[0 2SHUDWLQJ 0RGH 06,50[[ 0/';0[ < Figure 7.5: Connection example MLD 531 (transceiver system): sequence controlled 2-sensor muting with muting timeout 10 sec 7.3.4 Operating mode 4: • Start/restart interlock is selected • No contactor monitoring • If a second muting signal is supplied e.g. by a control, this can also be connected here at the 8-pin plug Leuze electronic GmbH + Co. - Page 42 $&$%) 5(6EXWWRQ 5(6 ODPS /HX]H 06,65/&$5[ /HX]H /HX]H 0/'0[ 0/'75[0 2SHUDWLQJ 0RGH 0/';0[ Figure 7.6: Connection example MLD 531 (transceiver system): sequence controlled 2-sensor muting with muting timeout 10 sec Leuze electronic GmbH + Co. KG MLD 531...
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Page 43: Starting Up The Device
Transmitter and receiver or transceiver and deflecting mirror must be aligned with one another. Only then is the safety sensor ready. Alignment can be performed with a clear protective field by observing the LEDs. Leuze electronic GmbH + Co. KG MLD 531... -
Page 44: Start/Restart Button
Make certain that the danger zone can be viewed from the start/restart button and that the entire process can be observed by the responsible person. Before and during the muting restart, ensure that there are no people in the danger zone. Leuze electronic GmbH + Co. KG MLD 531... - Page 45 The muting indicator illuminates continuously and the system returns to normal operation. Otherwise, the OSSDs are switched off again. NOTE A start/restart can also occur via the PLC signal (output impedance < 1.6 k , PNP switching). Ω Leuze electronic GmbH + Co. KG MLD 531...
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Page 46: Testing
Not until proper function of the optoelectronic protective device is ascertained may it be integrated in the control circuit of the system. NOTE As a safety inspection, Leuze offers testing by a competent person prior to the commissioning (see chapter 13). Leuze electronic GmbH + Co. KG... -
Page 47: Checklist - Before The Initial Start-Up
Is the required safety distance (protective field of the safety sensor to the next point of operation) maintained? 1. Test object / test piece: Opaque rod with a length of at least 150 mm and a diameter of 45 mm ± 3 mm. Leuze electronic GmbH + Co. KG MLD 531... -
Page 48: To Be Performed Periodically By Competent Persons
Only allow testing to be performed by qualified persons (see chapter 2.2). Observe the nationally applicable regulations and the time periods specified therein. NOTE As a safety inspection, Leuze offers periodic testing by a competent person (see chapter 13). Leuze electronic GmbH + Co. KG MLD 531... -
Page 49: Periodically By The Operator
Does the start/restart interlock prevent the automatic start-up of the machine after the safety sensor has been switched on or activated? Interrupt a light axis of the safety sensor with a test object during operation. Is the dangerous movement shut down immediately? Leuze electronic GmbH + Co. KG MLD 531... -
Page 50: Maintenance
Clean the front screen with a clean, antistatic cloth. After cleaning, check the position of transmitter and receiver. Clean the safety sensor regularly depending on the degree of contamination. Leuze electronic GmbH + Co. KG MLD 531... -
Page 51: Troubleshooting
Switch off the machine and leave it switched off. Analyze and eliminate the cause of the fault using the following table. If you are unable to rectify the fault, contact the Leuze branch responsible for you or call the Leuze customer service (see chapter 13). -
Page 52: Error Messages 7-Segment Display
OSSD2 Undervoltage at supply Select a suitable current source Overvoltage at supply Select a suitable current source Foreign transmitter detected Remove foreign transmitters and increase the dis- tance to the reflective surfaces. Leuze electronic GmbH + Co. KG MLD 531... - Page 53 Operating mode with start/restart Check the correctness of the selected operating interlock changed during opera- mode, change the operating mode if required, and tion (for MLD 320 and MLD 520) restart. Leuze electronic GmbH + Co. KG MLD 531...
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Page 54: Multicolor Indicator
Error during uploading Disconnect the device from the voltage supply for 5 s. 11.4 Multicolor indicator Table 11.1: Meaning of the display of the multicolor indicator on the MLD 531 Display Meaning Measures Green, continuously illumi- OSSD on, no muting... - Page 55 OSSD off, internal error In the event of an unsuccessful restart, contact customer service. Green flashing, slowly OSSD on, weak signal Check the alignment or clean the beam (1 Hz) exit windows. Leuze electronic GmbH + Co. KG MLD 531...
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Page 56: Disposing
Disposing Disposing For disposal observe the applicable national regulations regarding electronic components. Leuze electronic GmbH + Co. KG MLD 531... -
Page 57: Service And Support
Service and support Service and support Service hotline You can find the contact information for the hotline in your country on our website www.leuze.com under Contact & Support. Repair service and returns Defective devices are repaired in our service centers competently and quickly. We offer you an extensive service packet to keep any system downtimes to a minimum. -
Page 58: Technical Data
(CYJV2/7 or CYJV/7) cables or cables with cor- responding data Synchronization Optical between transmitter and receiver Protection class Degree of protection IP67 Ambient temperature, operation -30 ... 55 °C Ambient temperature, storage -40 ... 75 °C Leuze electronic GmbH + Co. KG MLD 531... - Page 59 +24 V: 10 mA MODE Input: Contact or transistor against +24 V: 5 mA (pnp) MS1, MS2 Input: +24 V: 5 mA Table 14.6: US patents US patents US 6,418,546 B US 7,741,595 B Leuze electronic GmbH + Co. KG MLD 531...
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Page 60: Interference Emission
• Group 1: All devices that do not belong to Group 2 (lab equipment, devices for industrial process measurement and control) • Group 2: All devices that intentionally generate HF energy for material processing / modification (microwave and induction ovens, electric welding equipment) Leuze electronic GmbH + Co. KG MLD 531... -
Page 61: Dimensions, Weights
Figure 14.1: Dimensions of MLD, 2-beam transceiver 48,5 51,5 Figure 14.2: Dimensions of MLD, 3-beam transceiver Figure 14.3: Dimensions of MLD-M, 2-beam deflecting mirror Figure 14.4: Dimensions of MLD-M, 3-beam deflecting mirror Leuze electronic GmbH + Co. KG MLD 531... -
Page 62: Dimensioned Drawings: Accessories
Technical data 14.4 Dimensioned drawings: Accessories Ø34 Mounting variants Figure 14.5: Swivel mount BT-240B Leuze electronic GmbH + Co. KG MLD 531... - Page 63 Technical data Ø41 Mounting variants Figure 14.6: Swivel mount BT-240C Leuze electronic GmbH + Co. KG MLD 531...
- Page 64 Technical data Swivel axis Beam distance Alternative mounting variant Figure 14.7: Mounting dimensions BT-240B, BT-240C Figure 14.8: BT-P40 clamp bracket Leuze electronic GmbH + Co. KG MLD 531...
- Page 65 Technical data 20,5 Ø 5,3 (2x) Ø 5,3 (2x) Figure 14.9: BT-2SB10 clamp swiveling mounting bracket 341,5 341,5 Figure 14.10: Muting sensor set, sequence controlled 2-sensor muting Leuze electronic GmbH + Co. KG MLD 531...
- Page 66 Technical data Set-AC-ML-2SA Set-AC-ML-2SB Figure 14.11: Set-AC-ML-2SA or Set-AC-ML-2SB mounted on MLD 500 multiple light beam safety de- vice Leuze electronic GmbH + Co. KG MLD 531...
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Page 67: Order Guide And Accessories
L: integrated laser alignment aid (for transmitter/receiver systems) M: integrated status indicator (MLD 320, MLD 520) or integrated status and muting indicator (MLD 330, MLD 335, MLD 510/A, MLD 530, MLD 531, MLD 535) E: Connection socket for external muting indicator (AS-i models only) -
Page 68: Device Models Of The Safety Sensor
Connection cable, 8-pin, 5 m long 50135129 KD S-M12-8A-P1-100 Connection cable, 8-pin, 10 m long 50135130 KD S-M12-8A-P1-150 Connection cable, 8-pin, 15 m long 50135131 KD S-M12-8A-P1-250 Connection cable, 8-pin, 25 m long Leuze electronic GmbH + Co. KG MLD 531... - Page 69 540357 BT-SET-240B-E Swivel mount 240° turning, material: plastic/metal Muting accessories 520150 AC-SCM5U Sensor connection box for MLD 530 und MLD 531 with M12 connection for connection to the 5-pin local socket Leuze electronic GmbH + Co. KG MLD 531...
- Page 70 Part no. Article Description 520151 AC-SCM5U-BT Sensor connection box for MLD 530 and MLD 531 with M12 connection and mounting plate, for con- nection to the 5-pin local socket, with 2 M4x22 cheese head screws; 2 BT-NC sliding blocks 520152...
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Page 71: Optoelectronic Muting Sensors
50134290 PRK25C.D/4P-200-M12 50134287 PRK25C.D/4P-M12 50134289 PRK25C.D/4P-M8 50139557 PRK25C.D/PX-2000-M12 50139556 PRK25C.D/PX-200-M12 50139555 PRK25C.D/PX-M8 50134296 PRK25C.D1/4P 50134298 PRK25C.D1/4P-200-M12 50134295 PRK25C.D1/4P-M12 50134297 PRK25C.D1/4P-M8 50137345 PRK25C.XA2/4P 50137343 PRK25C.XA2/4P-M12 50134280 PRK25C/4P 50134282 PRK25C/4P-200-M12 50134279 PRK25C/4P-M12 50134281 PRK25C/4P-M8 Leuze electronic GmbH + Co. KG MLD 531... - Page 72 Light-switching optical sensors Part no. Article HT3C series 50133596 HT3C.B/4P-200-M12 50133604 HT3C.BS/4P-200-M12 50133608 HT3C.BXL/4P-200-M12 50139947 HT3C.HF/4P-200-M12 50129381 HT3C.S/4P-200-M12 50129385 HT3C.XL/4P-200-M12 50129377 HT3C/4P-200-M12 50143278 HT3CI.X/4P-200-M12 50138110 HT3CI/4P-200-M12 50133615 HT3CL1.B/4P 50133616 HT3CL1.B/4P-200-M12 50133617 HT3CL1.B/4P-200-M8 50133614 HT3CL1.B/4P-M8 Leuze electronic GmbH + Co. KG MLD 531...
- Page 73 50139624 HT25C.XL/4P-200-M12 50143177 HT25C.XL/4P-200-M8 50139619 HT25C.XL/4P-M12 50139622 HT25C.XL/4P-M8 50134216 HT25C/4P 50134218 HT25C/4P-200-M12 50134215 HT25C/4P-M12 50134217 HT25C/4P-M8 50147336 HT25C/P4-M12 50144381 HT25CI.HF/4P-200-M12 50134232 HT25CI/4P 50134234 HT25CI/4P-200-M12 50134231 HT25CI/4P-M12 50134233 HT25CI/4P-M8 50139640 HT25CL1/4P 50139642 HT25CL1/4P-200-M12 Leuze electronic GmbH + Co. KG MLD 531...
- Page 74 HT46C series 50127054 HT46C/48-M12 50127049 HT46C/4P 50145451 HT46C/4P-1000-M12 50129752 HT46C/4P-200-M12 50145450 HT46C/4P-500-M12 50127048 HT46C/4P-M12 50127055 HT46C/4W-M12 50130201 HT46C/4X-200-M12 50127050 HT46C/4X-M12 50127066 HT46CI/48-M12 50127062 HT46CI/4P 50129751 HT46CI/4P-200-M12 50127061 HT46CI/4P-M12 50134612 HT46CI/4W-200-M12 50127067 HT46CI/4W-M12 Leuze electronic GmbH + Co. KG MLD 531...
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Page 75: Declaration Of Conformity
The device meets the basic requirements and the other relevant provisions of the machinery directive 2006/42/EC. The manufacturer of the product, Leuze electronic GmbH & Co KG in D-73277 Owen, possesses a certi- fied quality assurance system in accordance with ISO 9001.
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