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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...
(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...
• 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...
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...
• 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.
(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:...
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.
(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...
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...
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Device description Muting indicators Beam marking Figure 3.5: Muting indicator on the transceiver Leuze electronic GmbH + Co. KG MLD 531...
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 ...
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...
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...
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.
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...
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...
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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...
= 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...
: 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...
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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...
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...
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...
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...
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...
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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...
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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...
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...
• 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...
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...
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...
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...
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.
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.
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) •...
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.
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.
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...
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...
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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...
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...
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...
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...
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...
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...
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).
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...
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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...
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...
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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...
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.
(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...
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+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...
• 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...
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...
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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...
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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...
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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