Leuze electronic MLD 300, MLD 500 Original Operating Instructions

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MLD 300, MLD 500

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Multiple Light Beam Safety Devices

Original operating instructions

EN 2012/12 - 607342

We reserve the right to

make technical changes

1 About this document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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1.1 Used symbols and signal words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Approved purpose and foreseeable improper operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1.1 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1.2 Using the laser alignment aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1.3 Foreseeable misuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Competent persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3 Responsibility for safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4 Exemption of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1 Device overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.2 Connection system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2.1 AS-i parameter port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.3 Display elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.3.1 Operating indicators on the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.3.2 Operation indicators on the receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.3 7-segment display at the receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.3.4 Multicolor indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.4 Integrated laser alignment aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.1 Start/restart interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.2 Contactor monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.3 Signal output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.4 Range shift. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.5 MultiScan mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.6 Periodic function test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.7 Muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.7.1 Timing controlled 2-sensor muting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.7.2 Sequence controlled 2-sensor muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.7.3 Timing controlled 4-sensor muting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.7.4 Muting timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.7.5 Muting restart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.7.6 Alternative connection for second muting signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.7.7 Muting-enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.7.8 Partial muting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.7.9 Muting operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.1 Access guarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.1 Arrangement of transmitter and receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.1.1 Arrangement of 1-beam safety sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.1.2 Beam heights and ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.1.3 Calculating the safety distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.1.4 Calculation of the safety distance for vertical protective fields with reaching over . . . . . . . . . . . . . 31

6.1.5 Minimum distance to reflective surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.1.6 Preventing mutual interference between adjacent devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.2 Arrangement of the muting sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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6.2.1 Basic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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6.2.2 Selecting optoelectronic muting sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.3 Minimum distance for optoelectronic muting sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2.4 Arrangement of the muting sensors for timing controlled 2-sensor muting . . . . . . . . . . . . . . . . . . . 37

6.2.5 Arrangement of the muting sensors for sequence controlled 2-sensor muting . . . . . . . . . . . . . . . . 39

6.2.6 Arrangement of the muting sensors for timing controlled 4-sensor muting . . . . . . . . . . . . . . . . . . . 41

6.3 Mounting the safety sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.3.1 Suitable mounting locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.3.2 BT-240 swivel mount (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.3.3 BT-P40 clamp bracket (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

7 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

7.1 Pin assignment transmitter and receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

7.1.1 Standard pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

7.1.2 AS-i pin assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

7.1.3 AS-i signal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

7.2 Selecting contactor monitoring and start/restart interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.3 Selecting the muting operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

7.3.1 Operating mode 1 (muting):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

7.3.2 Operating mode 2 (muting timeout 8 h): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

7.3.3 Operating mode 3 (sequence controlled 2-sensor muting):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.3.4 Operating mode 4 (sequence controlled 2-sensor muting with muting timeout 8 h):. . . . . . . . . . . . 58

7.3.5 Operating mode 5 (muting-enable):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7.3.6 Operating mode 6 (partial muting): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

8 Setting the device into service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.1 Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.2 AS-i connection start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.2.1 Initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.2.2 Exchange of AS-i slaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.3 Aligning the safety sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.4 Aligning without integrated laser alignment aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.5 Aligning with integrated laser alignment aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

8.5.1 Required devices and tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8.5.2 Aligning without UDC device columns and without UMC Deflecting Mirror Columns . . . . . . . . . . . 65

8.5.3 Aligning with UDC device columns and with UMC Deflecting Mirror Columns . . . . . . . . . . . . . . . . 67

8.6 Start/restart button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.6.1 Unlocking start/restart interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.6.2 Muting restart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

9 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.1 Before the initial start-up and following modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9.1.1 Checklist – before the initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.2 To be performed periodically by competent persons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.3 To be performed daily by the operator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.3.1 Check list – daily or at change of shift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.4 Annual testing of safe switch-off of the AS-i connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

10 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

11 Rectifying the fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

11.1 What to do in case of failure? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

11.2 Operating displays of the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

11.3 Error messages 7-segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

11.4 Multicolor indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Leuze electronic MLD 300, MLD 500 4

11.5 Error message query via AS-Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

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12 Disposing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

13 Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

14 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

14.1 General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

14.2 Dimensions, weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

14.3 Dimensional drawings: accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

15 Ordering information and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

16 EC Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

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1 About this document

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1.1 Used symbols and signal words

Table 1.1: Warning symbols and signal words

Symbol indicating dangers to persons

NOTICE Signal word for property damage

Indicates dangers that may result in property damage if the measures for danger avoidance are not followed.

CAUTION Signal word for minor injury

Indicates dangers that may result in minor injury if the measures for danger avoidance are not followed.

WARNING Signal word for severe injury

Indicates dangers that may result in severe or fatal injury if the measures for danger avoidance are not followed.

DANGER Signal word for life-threatening danger

Indicates dangers with which serious or fatal injury is imminent if the measures for danger avoidance are not followed.

About this document

Table 1.2: Other symbols

Symbol for tips Text passages with this symbol provide you with further information.



Table 1.3: Terms and abbreviations

AOPD Active Optoelectronic Protective Device

EDM External Device Monitoring

MTTF Mean time to a dangerous failure

OSSD Output Signal Switching Device

SIL Safety Integrity Level

RES Start/REStart interlock

PFH Probability of a dangerous failure per hour

Symbols for action steps Text passages with this symbol instruct you to perform actions.

Active Optoelectronic Protective Device

Mean Time To Failure

Probability of dangerous Failure per Hour

PL Performance Level

1.2 Checklists

The checklists see chapter 9 „Testing“serve as a reference for the machine manufacturer or supplier. 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 MLD 300, MLD 500 6

2 Safety

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Before using the safety sensor, a risk assessment must be performed according to valid standards (e.g. EN ISO 14121, EN ISO 12100-1, EN ISO 13849-1, IEC 61508, EN IEC 62061). The result of the risk assessment determines the required safety level of the safety sensor see table 2.1. For mounting, oper- ating and testing, this document as well as all applicable national and international standards, regulations, rules and directives must be observed. Relevant and supplied documents must be observed, printed out and handed to affected persons.

 Before working with the safety sensor, completely read and understand the documents applicable to

your task.

In particular, the following national and international legal regulations apply for the start-up, technical inspections and work with safety sensors:

• Machinery directive 2006/42/EC

• Low voltage directive 2006/95/EC

• Electromagnetic compatibility directive 2004/108/EC

• Use of Work Equipment Directive 89/655/EEC supplemented by Directive 95/63 EC

• OSHA 1910 Subpart O

• Safety regulations

• Accident-prevention regulations and safety rules

• Ordinance on Industrial Safety and Health and Labor Protection Act

• Product Safety Law (ProdSG)

Safety

For safety-related information you may also contact the local authorities (e.g., industrial inspec- torate, employer's liability insurance association, labor inspectorate, occupational safety and health authority).

2.1 Approved purpose and foreseeable improper operation

WARNING

A running machine may result in serious injury!  Make certain that the safety sensor is correctly connected and that the protective function of the pro-

tective device is ensured.

 Make certain that, during all conversions, maintenance work and inspections, the system is securely

shut down and protected against being restarted again.

2.1.1 Proper use

• The safety sensor may only be used after it has been selected in accordance with the respectively applicable instructions and relevant standards, rules and regulations regarding labor protection and safety at work, and after it has been installed on the machine, connected, commissioned, and checked by a competent person see chapter 2.2 „Competent persons“.

• When selecting the safety sensor it must be ensured that its safety-related capability meets or exceeds the required performance level PL

The following table shows the safety-related characteristic parameters of the MLD 300 and MLD 500 series.

ascertained in the risk assessment.

Leuze electronic MLD 300, MLD 500 7

Table 2.1: Models and safety-related parameters for the MLD 300 and MLD 500 series

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Safety

Variant MLD 312 (for external

MLD 300 MLD 500

testing)

Type in accordance with

Type 2 Type 2 Type 4

EN IEC 61496-1, -2

SIL in accordance with IEC 61508 SIL 2 SIL 3

SILCL in accordance with

- SILCL 2 SILCL 3

EN IEC 62061 Performance Level (PL) in accor-

up to PL d

PL d PL e

dance with EN ISO 13849-1

Category in accordance with

category 2 category 3 category 4

EN ISO 13849-1

Probability of a dangerous failure per hour

PFH

=1.2 x 10

b)Leuze electronic

PFH

=1.2 x 10

-8

PFHd=6.6 x 10

safety monitoring device

MTTF

a) with a respective safety monitoring device (e.g., Leuze electronic MSI-T), with DC

b) during an external test with DC > 90 %, e.g., with a MSI-T

204 years

³ medium

avg

-9

c) or 6.0 x 10E-9 for MLD/AS-i

• The safety sensor protects persons at access points or at hazard locations of machines and plants.

• The safety sensor detects persons only when they enter the danger zone but cannot tell whether there are any persons inside the danger zone. For this reason, a start/restart interlock in the safety chain is essential.

• 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.

• The safety sensor must be tested regularly by competent persons see chapter 2.2 „Competent persons“.

• The safety sensor must be exchanged after a maximum of 20 years. Repairs or the exchange of parts subject to wear and tear do not extend the service life.

2.1.2 Using the laser alignment aid

The optional internal laser alignment aid is available for transmitter-receiver systems.

WARNING

The laser light source corresponds to laser class 2 according to EN 60825-1. Extended looking into the beam path may damage the eye's retina.

 Never look directly into the laser beam or into the direction of reflected beams.

Laser alignment aids must only be switched on for the purpose of alignment or testing the alignment of transmitters, receivers and Deflecting Mirror Columns.

WARNING

Adjustment work with lasers must be carried out by competent and instructed persons only.

Do not switch on the laser if persons are present in the laser path. Inform persons in the vicinity before embarking on alignment work with lasers.

Leuze electronic MLD 300, MLD 500 8

Safety

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 After switch-on the laser lights up for about 10 minutes. Do not leave the installation location during this

time.

 Interrupt the laser beam using a non-transparent, non-reflective object if the laser beam has inadver-

tently been pointed at a human.

 Note the current legal and local laser protection regulations according to EN 60825-1.

Laser warning signs and notice signs There are laser warning signs near the laser beam egress pointsee figure 2.1.

 Attach the supplied self-adhesive notice signs clearly visible at the safety sensor and on the device col-

umn see figure 2.2.

 If used in the U.S., attach the respective notice sign.

Figure 2.1: Laser warning sign

LASERSTRAHLUNG

NICHT IN DEN STRAHL BLICKEN

LASER KLASSE 2

DIN EN 60825-1: 2008-05

Max. Leistung: Wellenlänge: 650 nm

1 mW

Figure 2.2: Self-adhesive notice signs

2.1.3 Foreseeable misuse

Any use other than that defined under the “Approved purpose” or which goes beyond that use is consid- ered improper use.

In principle, the safety sensor is not suitable as a protective device for use in the following cases:

• danger of objects being expelled or hot or dangerous liquids spurting from the danger zone

• applications in explosive or easily flammable atmospheres

• reachability of the location of hazard by hand from the mounting location of the safety sensor

• detection of the presence of persons in danger zones

USA

LASER LIGHT DO NOT STARE INTO BEAM CLASS 2 LASER PRODUCT

DIN EN 60825-1: 2008-05

Max. Output: Wavelength:

RAYONNEMENT NE PAS REGARDER DANS LE FAISCEAU APPAREIL A LASER DE CLASSE 2

DIN EN 60825-1: 2008-05

Puissance max.: Longueur d'onde émis:

LASER LIGHT DO NOT STARE INTO BEAM CLASS 2 LASER PRODUCT

IEC 60825-1: 2007

Complies with 21 CFR 1040.10

Max. Output:

Wavelength:

1 mW

650 nm

1 mW

650 nm

1 mW

650 nm

Leuze electronic MLD 300, MLD 500 9

2.2 Competent persons

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Prerequisites for competent persons:

• They have a suitable technical education.

• They know the rules and regulations for occupational safety, safety at work and safety technology and can assess the safety of the machine.

• They know the instructions for the safety sensor and the machine.

• They have been instructed by the responsible person on the mounting and operation of the machine and of the safety sensor.

2.3 Responsibility for safety

Manufacturer and operating company must ensure that the machine and implemented safety sensor func- tion properly and that all affected persons are adequately informed and trained.

The type and content of all imparted information must not lead to unsafe actions by users.

The manufacturer of the machine is responsible for:

• safe machine construction

• safe implementation of the safety sensor

• imparting all relevant information to the operating company

• adhering to all regulations and directives for the safe starting-up of the machine

Safety

The company operating the machine is responsible for:

• instructing the operator

• maintaining the safe operation of the machine

• adhering to all regulations and directives for occupational safety and safety at work

• Regular testing by instructed persons

2.4 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

• 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 MLD 300, MLD 500 10

3 Device description

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The safety sensors of the MLD 300 and MLD 500 series are active optoelectronic protective devices, each with two failsafe OSSDs. They satisfy the following standards:

• Performance Level PL d and PL e in accordance with EN ISO 13849-1

• Safety category 2, 3 and 4 in accordance with EN ISO 13849-1

• Safety Integrity Levels SIL 3 and SIL 2 in accordance with IEC 61508 and EN IEC 62061

• Type 2 and type 4 in accordance with EN IEC 61496-1, prEN IEC 61496-2

The safety sensors are available as transmitter-receiver systems (1-, 2-, 3- and 4-beam) or as transceiver systems (2- and 3-beam). All device versions satisfy laser class 1 acc. to EN 60825-1 and EN 62471-2006. They are protected against overvoltage and overcurrent acc. to IEC 60204-1 (safety class 3). Infrared beams are modulated in specially shaped pulse packets in such a way that they can be distinguished from ambient light (e.g. welding sparks, warning lights) and, thus, not be affected by it.

3.1 Device overview

The following tables provide an overview over the device models' functions of the MLD 300 and MLD 500 series.

Table 3.1: Models and functions of the MLD 300 series

Device description

Transmit-

Receiver/transceiver

ter

MLD 300 MLD 310 MLD 312 MLD 320 MLD 330

MLD 335

OSSDs 2122

Automatic start/restart

RES

EDM

Signal output

LED display

7-segment display

Integrated muting

a) RES selectable

b) EDM selectable











Table 3.2: Models and functions of the MLD 500 series

Transmitter Receiver/transceiver

MLD 500 MLD 500/

MLD 510 MLD 520 MLD 530

AS-i

OSSDs 2 2 2

Automatic start/restart

RES

EDM

Signal output

Leuze electronic MLD 300, MLD 500 11







MLD 535



MLD 500/ AS-i

Transmitter Receiver/transceiver

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Device description

LED display

7-segment display

Integrated muting

a) RES selectable

b) EDM selectable

MLD 500 MLD 500/

AS-i



MLD 510 MLD 520 MLD 530

MLD 535



MLD 500/ AS-i

Figure 3.1: Transmitter-receiver system

The transmitter-receiver system consists of one transmitter and one receiver.

Figure 3.2: Transceiver system

The transceiver system consists of an active transceiver (transmitter/receiver) and a passive Deflecting Mirror (no electrical connection, deflects the light beams by 2 x 90°).

3.2 Connection system

Transmitter and receiver are equipped with M12 round pin plugs that differ in pin number depending on device version:

Leuze electronic MLD 300, MLD 500 12

Device description

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Device version Number of pins on the receiver/trans-

MLD 310, MLD 510 5-pin plug 5-pin plug

MLD 312 5-pin plug 5-pin plug

MLD 320, MLD 520 8-pin plug 5-pin plug

MLD 330, MLD 530 8-pin plug and 5-pin socket 5-pin plug

MLD 335, MLD 535 8-pin plug and 8-pin socket 5-pin plug

MLD 500/AS-i, MLD 510/AS-i 5-pin plug 5-pin plug

MLD 510-...I/O 5-pin plug and separate 5-pin socket for

3.2.1 AS-i parameter port

The parameter port can only be addressed by the bus master. MLD/A1 delivers a safety at work-specific code sequence which the AS-i Safety Monitor teaches in and permanently monitors. In addition, the bus master has the option of reading the interfering signal via the parameter port and controlling an internal or external muting display via the cyclical output data see chapter 7.1.2 „AS-i pin assignment“.

3.3 Display elements

The display elements of the safety sensors simplify start-up and fault analysis.

ceiver

external muting indicator

Number of pins on the transmitter

5-pin plug

3.3.1 Operating indicators on the transmitter

There is a green LED at each light axis of the transmitter serving as a function indicator.

1LED 2 Beam marking

Figure 3.3: Green LED on each transmitter light axis for function indication

Transmitter

Leuze electronic MLD 300, MLD 500 13

Table 3.3: Meaning of the LED

Receiver

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LED Description

Green Transmitted beam active

Off Fault (transmitted beam inactive)

3.3.2 Operation indicators on the receiver

The receiver has a LED (LED1, red or green). The following device models have additional display elements at the receiver:

• MLD 320, MLD 520: LED2 (yellow)

• MLD 330, MLS 335, MLD 530, MLD 535: LED2 (yellow), 7-segment display, muting indicator (optional)

Device description

1LED1 2 Symbol for OSSD 3 Interface symbol (MLD 330, MLD 335, MLD 530, MLD 535) 4LED2 5 Symbol RES 6 Beam marking

Figure 3.4: Operation indicators on the receiver

Table 3.4: Meaning of LED1

LED1 Meaning

Red OSSD off

Green OSSD on

Red slowly flashing (approx. 1 Hz) External fault

Red flashing fast (approx. 10 Hz) Internal fault

Green slowly flashing (approx. 1 Hz) OSSD on, weak signal

Leuze electronic MLD 300, MLD 500 14

Table 3.5: Meaning of the LED2 displays

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LED2 Meaning

Yellow Start/restart interlock locked (restart required)

Table 3.6: Meaning of LED2 for safety sensor with integrated AS-i interface (AS-i model)

LED2 Meaning

Red AS-i slave is not communicating with AS-i master

Green AS-i slave is not communicating with AS-i master

Yellow flashing AS-i slave has invalid address 0

Red flashing AS-i slave device fault or AS-i connection defective

Flashing green, red alternately Periphery fault

Off No voltage

3.3.3 7-segment display at the receiver

Device description

(MLD 330, MLD 335, MLD 530, MLD 535) The 7-segment display shows the number of the operating mode (1 to 6) and assist in the detailed fault

diagnosis see chapter 11 „Rectifying the fault“. For the identification of the fault, the fault'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.

Receiver

1LED1 2 Symbol for OSSD 3 Interface symbol 4 7-segment display 5LED2 6 RES symbol 7 Beam marking

Figure 3.5: 7-segment display on MLD 330, MLD 335, MLD 530, MLD 535 receiver

Leuze electronic MLD 300, MLD 500 15

Table 3.7: Meaning of the 7-segment display

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Display Meaning

1...6 Operating mode selected during standard operation

F... Device fault, internal fault

E... Fault, external fault see chapter 11 „Rectifying the fault“

U... Usage Event, e.g., U52: muting time limit elapsed see

3.3.4 Multicolor indicator

(Optional for MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLD 535 as well as for MLD 510/AS-i, MLD 510-...M/A)

The multicolor indicator signals the OSSD state see table 11.1. In addition, during muting a constant white light signals that muting has been started correctly and that the protective function has been bridged. A muting error is signalized by blinking see table 11.2.

With AS-i devices, the integrated muting indicator must be set externally, e.g. via asimon config- uration and diagnostics software.

Device description

chapter 11 „Rectifying the fault“

1 Muting indicators 2 Beam marking

Figure 3.6: Muting indicator on the receiver

3.4 Integrated laser alignment aid

(Optional for MLD 310, MLD 312, MLD 320, MLD 510, MLD 520) The laser alignment aid is optionally available for transmitter-receiver systems. There is a red light laser

on the transmitter side of each light axis. The laser beams can all be switched on simultaneously via MagnetKey. The sensor for the MagnetKey is located next to the transmitter's first light axis. The laser beams remain active for approx. 10 min and then switch off automatically see chapter 8.5 „Aligning with integrated laser alignment aid“.

Alternatively, the laser can also be activated for approx. 10 min by a signal on the transmitter. To do this, a change has to be made from 0 V to 24 V on PIN2, e.g. with a connected button see table 7.1.

Leuze electronic MLD 300, MLD 500 16

Device description

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1 Transmitter 2 Laser 3 MagnetKey 4 Beam marking

Figure 3.7: MagnetKey activation position at first light axis of the transmitter

CAUTION

Danger! Class 2 laser beams!

 Never look directly into the laser beam. This can cause damage to the eye.

Leuze electronic MLD 300, MLD 500 17

4 Functions

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Table 4.1: Overview of the safety functions

Function Description

Stop function safety-related; initiated by the protective device

RES (start/restart interlock) prevents automatic restart; forces manual confirmation

EDM (contactor monitoring) monitors the N/C contacts of downstream positive-guided

Muting targeted, proper bridging of the protective function

Periodic function test safety-related; initiated and tested, e.g. by an external

Table 4.2: Functions of the different versions

Functions

contactors and relays

safety monitoring device

Function MLD 310,

MLD 510

MLD 312, testable

MLD 320, MLD 520

MLD 330, MLD 530

MLD 335, MLD 535

OSSDs 21222

Automatic start/restart

RES

EDM

EDM, selectable

Signal output

LED display

7-segment display

2-sensor muting, parallel and sequential

Timing controlled 4-sensor muting

Laser alignment aid















(optional for transmitter-receiver systems)

Configurable operating modes



External test

a) Selectable

b) with shortened filter times: 0.1 s instead of 3 s



4.1 Start/restart interlock

(MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLS 535) The start/restart interlock prevents automatic release of the safety circuits and automatic start-up of the

system (e.g. if the protective field is again clear or if an interruption in the voltage supply is restored). The operator must make certain that no people are present in the danger zone before the system is manually re-enabled with the start/restart button see chapter 8.6.1 „Unlocking start/restart interlock“.

Leuze electronic MLD 300, MLD 500 18

4.2 Contactor monitoring

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(MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLS 535) The electro-sensitive protective equipment monitors the feedback circuits of the connected contactors.

The signal at the EDM input is compared to the state of the OSSDs. The feedback circuit must be open while the OSSDs are switched on (high-impedance). When the OSSDs are switched off, 0 V is applied at the EDM input see chapter 7.2. The reaction at the EDM input with respect to the OSSDs is delayed by maximum 500 ms (contactors).

4.3 Signal output

(MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLS 535) The receiver or transceiver features a signal output.PIN1 reports the state of the OSSDs.

Table 4.3: Signaling of the state of the OSSDs

Voltage on signal output (PIN1) OSSD

0 V On

24 V Off

Functions

4.4 Range shift

With transmitter/receiver systems, the range can be adjusted on PIN4 of the transmitter. It is possible to shift between 50 m and 20 m.

Table 4.4: Range shift on PIN4 of the transmitter

PIN4 Transceiver

0 V 50 m

24 V approx. 20 m

4.5 MultiScan mode

Only after an interruption of the protective field continues for several consecutive scans is the system switched off. This increases the availability (e.g. in the event of minor physical shocks).

4.6 Periodic function test

(MLD 312) The receiver/transceiver of the MLD 312 is equipped with a test input for the periodic function test by an

external safety monitoring device (e.g. Leuze electronic MSI-T). Signal response and timing see figure 4.1.

When using the external Test Monitoring Unit, make certain that the test duration does not ex- ceed 150 ms.

Leuze electronic MLD 300, MLD 500 19

Figure 4.1: Reaction of the OSSD switching output of the MLD 312 to an external test request

max.150 ms

high-impedance

OSSD-Output +24 V

high-impedance or 0 V

Input + 24 V

6 ms

MS1

MS2

MS1

MS2

Muting

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For series connection of multiple type 2 devices (e.g. MLD 312 and type 2 Light Beam Safety Devices), cross connection between test signal and switching output is to be avoided. For this purpose, connecting cables must be laid so that no cross connections can occur, or test signal and switching output must be laid in separate cables.

Functions

4.7 Muting

By means of muting, the protective function can be temporarily and properly suppressed, e.g. if objects are to be transported through the protective field. During this time, the OSSDs remain in the ON state in spite of interruption of one or more beams.

Muting is only initiated automatically and via two mutually independent muting signals. The muting indi- cator illuminates continuously during the entire duration of muting operation. End of muting operation is forced as soon as the preset maximum duration (muting timeout) is exceeded.

Following malfunctions or operationally related interruptions (e.g. power failure, violation of the concur- rency condition during timing controlled 2-sensor muting on activation of the muting sensors), the system can be manually reset with the start/restart button and overridden.

4.7.1 Timing controlled 2-sensor muting

The two muting sensors MS1 and MS2 are arranged in such a way that the beams cross and the process can automatically activate both sensors (within 4 s). As a result, an object can be transported through the protective field in both directions. The intersection point must be within the danger zone to prevent muting from being unintentionally triggered.

If muting was properly activated, it remains active even during brief interruptions of a single sensor signal. On foil-wrapped objects, for example, brief signal interruptions can occur—particularly with light scanners. These short signal interruptions are, therefore, filtered out for up to max. 3 s (MLD 335, MLD 535: 300 ms). If both muting sensors are inactive simultaneously, timing controlled 2-sensor muting ends.

Leuze electronic MLD 300, MLD 500 20

1 Danger zone MS1 Muting sensor 1 MS2 Muting sensor 2 t

Time frame in which both muting sensors must be activated (4 s)

Figure 4.2: Timing controlled 2-sensor muting–arrangement of the muting sensors and timing

4.7.2 Sequence controlled 2-sensor muting

MS2

MS1

MS2

Muting

<5 s

MS1

MS2

Muting n

>300 ms

Muting

n+1

MS2

MS1

<5 s

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Sequence controlled 2-sensor muting is particularly well suited for exiting danger zones, especially if there is only limited space available outside of the danger zone. In this case, material transport is only permis- sible in one direction due to the arrangement of the muting sensors. Muting sensors MS1 and MS2 are positioned within the danger zone and arranged so that they are activated in sequence. Once the muting area is clear again, the muting state ends with a delay of 5 s. For sequence controlled 2-sensor muting, there are no temporal expectations between MS1 and MS2. The only conditions that must be observed is that, within eight hours of activation of MS1, MS2 must also be activated. In this way transported goods can exit the protective field in a timely manner.

Functions

1 Danger zone MS1 Muting sensor 1 MS2 Muting sensor 2 t8 h

Figure 4.3: Sequence controlled 2-sensor muting–arrangement of the muting sensors and timing

Sequence controlled 2-sensor muting can also be used if objects that are positioned close to one another are to be moved through the protective field. The distance between the individual objects must, however, be large enough that at least one muting sensor is free between two successive objects for at least 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).

1 Danger zone MS1 Muting sensor 1 MS2 Muting sensor 2 t<8 h

Figure 4.4: Muting for tight sequences of objects–arrangement of the muting sensors and timing

4.7.3 Timing controlled 4-sensor muting

(MLD 335, MLD 535) Timing controlled 4-sensor muting is

must be parallel, due to special application situations, e.g. with reflective materials or under disruption.

Leuze electronic MLD 300, MLD 500 21

used when

the muting sensor light beams should not cross, but instead

Functions

MS3

MS4

MS1

MS2

MS1

MS2

Muting

MS3

MS4

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tive environmental conditions. For timing controlled 4-sensor muting, t he fo u r muti n g sen s o rs ar r a nged i n succession must be activated in a defined and specific order to trigger muting see figure 4.5.

Muting occurs during both forward and reverse drives. The order in which the muting sensors are activated is decisive for launching muting. The following orders are permitted:

• MS1, MS2, MS3, MS4

• MS4, MS3, MS2, MS1

MS2 (MS3) must be activated within 4s of MS1 (MS4).

1 Danger zone MS1 Muting sensor 1 MS2 Muting sensor 2 MS3 Muting sensor 3 MS4 Muting sensor 4 t4 s

Figure 4.5: Timing controlled 4-sensor muting: arrangement of the muting sensors and timing

Muting is ended correctly (e.g. the OSSDs remain in the ON state during passage) when the MS3 becomes free during the expected passing sequence and therefore switches to “inactive”.

Muting is ended incorrectly (e. g. the OSSDs switch off) when the following cases occur:

• During the muting process, a muting sensor incorrectly switches to “inactive”.

• MS2 is not activated within 4 s after MS1 (or MS3 is not activated within 4 s after MS4).

• The muting time limit has elapsed.

Make sure that the material to be transported is sufficiently long for the simultaneous activation of the muting sensors see chapter 6.2.6 „Arrangement of the muting sensors for timing controlled 4-sensor muting“.

4.7.4 Muting timeout

A flexible, application-adapted muting timeout extension (e.g. by a high-pass signal) is possible in oper- ating modes 1, 5 and 6 (see chapter 4.7.9). In the standard operating modes, the time frame for the muting timeout is set to 10 min. and muting is automatically ended after this time elapses (the protective function is active again). In operating modes 2 and 4, 8 h is set as muting timeout.

For this purpose, +24 V must be applied to the muting timeout input before muting is initiated. If, during muting, voltage now switches to 0 V at this input (e.g. by a high-pass signal), the muting timeout is extended as long as 0 V continues to be present. After the muting timeout extension ends, muting is only possible for another 10 min.

The muting timeout extension ends as soon as one of the following conditions is met:

• Level at the input of the muting timeout extension switches to the high state

• Muting duration reaches 8 h

Leuze electronic MLD 300, MLD 500 22

MS1

MS2

Muting

Muting-TO

max. 10 min

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Functions

MS2

Muting

Muting-EN/TO

1 M-EN / TO = high -> muting timeout extension 2 Start of the muting timeout extension 3 End of the additional muting timeout extension

Figure 4.6: Muting timeout extension

max. 8h

max. 10 min

1 M-EN / TO = low -> no muting timeout extension

Figure 4.7: No valid signal for timeout extension

4.7.5 Muting restart

Following a muting fault (e.g. muting timeout, failure of the supply voltage), the restart button can be used to override the muting path even if the protective field is interrupted see chapter 8.6.2 „Muting restart“.

4.7.6 Alternative connection for second muting signal

Particularly in cases in which the second independent muting signal comes, for example, from a control, it is advantageous to connect this signal to the machine interface (8-pin plug). In operating modes 2, 3, 4 and 6, the second muting signal can alternatively be connected to input MS2 of the 8-pin plug or to input MS2 of the local interface (5-pin socket).

The muting signal from the control must not be applied constantly; rather, it must only be activat- ed if muting is required.

Leuze electronic MLD 300, MLD 500 23

Functions

MS1

MS2

Muting

Muting-Enable

max. 8h

MS1

MS2

Muting

Muting-Enable

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1 Machine interface (8-pin) 2 Local interface (5-pin socket)

Figure 4.8: 2nd muting signal from the control

4.7.7 Muting-enable

With the muting-enable function, muting can be enabled or disabled via an external signal. If +24 V is applied at the muting-enable input, a subsequent, valid muting sequence results in muting. If 0 V is applied at the muting-enable input, no muting is possible, even if a valid muting sequence is detected. This signal may be applied for a maximum of 8 hours (as high level); otherwise, a fault is displayed. Before muting- enable can be used, 0 V must first be applied at the muting-enable input.

PLC

MS1

Figure 4.9: Muting-enable

Leuze electronic MLD 300, MLD 500 24

Figure 4.10: No valid muting-enable signal

1 No muting possible here!

MS1 MS2

Muting

Muting-Enable

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Figure 4.11: Example: Fault at the muting-enable cable

4.7.8 Partial muting

For transmitter-receiver systems, the top light beam is not included in muting in operating mode 6. As a result, the protective device switches to the interlock state in spite of active muting if the upper beam is interrupted.

4.7.9 Muting operating modes

The device versions with integrated muting can be operated in six different operating modes. Corre- sponding to the operating mode selected, various functions are available for every muting type.

All functions and operating modes can be selected without additional equipment, such as PC, software, etc.

Details concerning operation mode selection can be found in chapter “Electrical connection” see chapter 7.3 „Selecting the muting operating modes“

Functions

Table 4.5: MLD 330, MLD 530 operating modes and functions (2-sensor muting)

Functions

Operating mode

RES



EDM

Muting operating mode

Muting timeout

Selectable Timing controlled 2-sensor muting 10 min

Selectable Timing controlled 2-sensor muting 8 h

Muting timeout extension



Alternative connection for second muting signal



Muting-enable

Partial muting

Leuze electronic MLD 300, MLD 500 25



Selectable Sequence controlled 2-sensor muting 10 min



Functions

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Functions



Selectable Timing controlled 2-sensor muting 10 min



a) If the second muting signal comes, for example, from a control, this signal can also be connected to the 8-pin plug (usu-

ally establishes a connection to the cabinet).

Sequence controlled 2-sensor muting 8 h

Timing controlled 2-sensor muting 10 min



 



Table 4.6: MLD 335, MLD 535 operating modes and functions (2- and 4-sensor muting)

Functions

Operating mode

a) If the second muting signal comes, for example, from a control, this signal can also be connected to the 8-pin plug (usu-

b) Timing controlled 2-sensor muting also possible with shortened filter times: 0.1 s instead of 3 s

RES



ally establishes a connection to the cabinet).

EDM

Muting operating mode

Selectable Timing controlled 4-sensor muting

Selectable Sequence controlled 2-sensor muting 10 min

Sequence controlled 2-sensor muting 8 h

Selectable Timing controlled 4-sensor muting

Timing controlled 4-sensor muting

Muting timeout

10 min

8 h

10 min

Muting timeout extension





Alternative connection for second muting signala)Muting-enable



Partial muting

Leuze electronic MLD 300, MLD 500 26

5 Applications

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5.1 Access guarding

MLD safety sensors are used e.g. for access guarding of danger zones. They detect people only upon entry into the danger zone, i.e. they do not detect a person who is present in the danger zone. Access guarding may therefore only be operated with activated start/restart interlock or additional safety measures must be taken.

Applications

Figure 5.1: 2-beam guarding for exits on palleting lines

Figure 5.2: 3-beam guarding with transceiver system for an application with palletizing robot

Leuze electronic MLD 300, MLD 500 27

Applications

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Figure 5.3: Access guarding with timing controlled 2-sensor muting for an application with a pallet wrap-

ping machine

Figure 5.4: Access guarding on the roller conveyor with timing controlled 4-sensor muting (MLD 535 with

pre-mounted Muting Sensor Sets)

Leuze electronic MLD 300, MLD 500 28

Applications

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Figure 5.5: Access guarding of danger zones with 1-beam safety sensor for offset mounting locations

Figure 5.6: Access guarding based on AS-i safety at work with MLD 500/AS-i at a machining center

Leuze electronic MLD 300, MLD 500 29

6 Mounting

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WARNING

Improper mounting may result in serious injury! The protective function of the safety sensor is only ensured if appropriately and professionally mounted

for the respective, intended area of application.

 Only allow competent persons to install the safety sensor.

 Maintain the necessary safety distances see chapter 6.1.3 „Calculating the safety distance“.

 Observe the relevant standards, regulations and these instructions.

 Clean the transmitter and receiver at regular intervals: environmental conditions see chapter 14

„Technical data“, care see chapter 10 „Maintenance“.

 After mounting, check the safety sensor for proper function.

6.1 Arrangement of transmitter and receiver

Optical protective devices can only perform their protective function if they are mounted with adequate safety distance. When mounting, all delay times must be taken into account, e.g. the response times of the safety sensor and control elements as well as the stopping time of the machine.

The following standards specify calculation formulas:

Mounting

• EN 13855, "The positioning of protective devices in respect of approach speeds of parts of the human body": mounting situation and safety distances

• prEN IEC 61496-2, "Active Optoelectronic Protective Devices": distance of the reflecting surfaces/ Deflecting Mirrors

6.1.1 Arrangement of 1-b

When safeguarding with 1-beam safety sensors, make certain that the light beams are aligned parallel to the reference plane, e.g. to the floor. For multi-axis safeguarding with 1-beam safety sensors, the opposite beam direction is to be selected for adjacent sensors because the light beams in the individual axes otherwise mutually interfere with one another, thereby affecting the safe function of the protective device.

Figure 6.1: Multi-axis arrangement with geometric offset

eam safety sensors

6.1.2 Beam heights and ranges

Table 6.1: Beam heights and ranges of the device versions

Beams / beam distance [mm]

Recommendation of beam heights in ac-

Transmitter/receiver range [m] Transceiver

cordance with EN ISO 13855 [mm]

1 / - - 0.5 to 70 / 20 to 100 -

Leuze electronic MLD 300, MLD 500 30

range [m]

Mounting

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Beams / beam distance [mm]

Recommendation of beam heights in accordance with EN ISO 13855 [mm]

2 / 500 400, 900 0.5 to 50 / 20 to 70 0.5 to 8

3 / 400 300, 700, 1100 0.5 to 50 / 20 to 70 0.5 to 6

4 / 300 300, 600, 900, 1200 0.5 to 50 / 20 to 70 -

6.1.3 Calculating the safety distance

General formula for calculating the safety distance S of an Optoelectronic Protective Device acc. to EN ISO 13855 or EN 13855:

S [mm] = Safety distance K [mm/s] = 1600 mm/s (approach speed for access guarding) T [s] = Total time of the delay C [mm] = 850 mm (default value for arm length)

 Calculate the safety distance S for access guarding using the formula acc. to EN ISO 13855 or

EN 13855:

Transmitter/receiver range [m] Transceiver

range [m]

When using AS-i safety sensors, the bus system reaction time of maximum 40 ms additionally required by the AS-Interface and the AS-i Safety Monitor must be added to the total time of the delay (T) (when completely equipped with 31 slaves).

S [mm] = Safety distance t

[s] = Response time of the protective device

[s] = Response time of the safety interface device

[s] = Stopping time of the machine

If longer stopping times are determined during regular inspections, an appropriate additional time must be added to t

Calculation example A robot with a stopping time of 250 ms is to be safeguarded with a safety sensor. The response time is

10 ms and an additional interface does not need to be used.

K [mm/s] = 1600 mm/s T [ms] = (10 ms + 250 ms) C [mm] = 850 mm S [mm] = 1600 mm/s × 0.26 s + 850 mm S [mm]= 1266 mm

6.1.4 Calculation of the safety distance for vertical protective fields with reaching over

If it is possible to reach over or under a vertical protective field, additional distance CRO must be observed in addition to the safety distance corresponding to EN ISO 13855.

Leuze electronic MLD 300, MLD 500 31

KxT

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[mm] = Safety distance in the case of access above the protective field

K [mm/s] = 1600 mm/s (approach speed for access guarding) T [s] = Total sum of the delay (ta + ti + tm) from t

: response time of the protective device ti:

response time of the safety interface device tm: 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)

Mounting

1 Safety sensor 2 Danger zone 3Floor a Height of the point of operation b Height of the upper beam of the safety sensor

Figure 6.2: Additional distance to the safety distance when reaching over and under

Table 6.2: Reaching over the vertical protective field of electro-sensitive protective

equipment(excerpt from EN ISO 13855)

Height a of the point of operation

Height b of the upper edge of the protective field of the electro-sensitive protective equipment

[mm]

900 1000 1100 1200 1300

Additional distance CRO to the danger zone [mm]

2600 0 0 0 0 0

2500 400 400 350 300 300

2400 550 550 550 500 450

2200 800 750 700 650 650

2000 950 950 850 850 800

1800 1100 1100 950 950 850

1600 1150 1150 1100 1000 900

1400 1200 1200 1100 1000 900

Leuze electronic MLD 300, MLD 500 32

Mounting

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Height a of the point of operation

Height b of the upper edge of the protective field of the electro-sensitive protective equipment

[mm]

900 1000 1100 1200 1300

Additional distance CRO to the danger zone [mm]

1200 1200 1200 1100 1000 850

1000 1200 1150 1050 950 750

800 1150 1050 950 800 500

600 1050 950 750 550 0

400 900 700 0 0 0

200 600 0 0 0 0

0 00000

Given are

• Height a of the point of operation

• Height b of the upper beam of the safety sensor

To be determined is the necessary distance S of the safety sensor to the point of operation and thereby additional distance C

 In the column head, look for the column with the next lowest entry for the height of the upper beam of

the safety sensor.

 Look for the next lowest value for real additional distance C

in this column.

 In this line, go left to the left column: here you will find the permitted height of the point of operation.

If S

> S, SRO is to be used!

Calculation example A machine system with a stopping time of 300 ms should be safeguarded with a 3-beam safety sensor.

The response time is 35 ms and an additional interface does not need to be used. A danger zone height of 600 mm is assumed. Beams should be placed at heights of 300 mm, 700 mm and 1100 mm from the floor.

Calculation of safety distance S:

K [mm/s] = 1600 mm/s T [ms] = 335 ms C [mm] = 850 mm S [mm] = 1600 mm/s × 0.335 s + 850 mm S [mm]= 1386 mm

Calculation of safety distance SRO when protective field is accessed from above: Since the height of the upper beam equals 1100 mm, possible reaching over is to be taken into account.

If the height of the danger zone is 600 mm, the value for C

K [mm/s] = 1600 mm/s T [ms] = 335 ms

[mm] = 750 mm

S [mm] = 1600 mm/s × 0.335 s + 750 mm

[mm]= 1286 mm

= 750 mm see table 6.2.

This means SRO < S, so S is to be used!

Leuze electronic MLD 300, MLD 500 33

Calculation of safety distance SRO when the height of the upper beam has changed:

4°

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The height of the upper beam is now 900 mm. All other parameters remain the same. C table 6.2.

K [mm/s] = 1600 mm/s T [ms] = 335 ms C

[mm] = 1050 mm

S [mm] = 1600 mm/s × 0.335 s + 1050 mm

[mm]= 1586 mm

This means SRO > S, so SRO is to be used!

6.1.5 Minimum distance to reflective surfaces

WARNING

Failure to maintain minimum distances to reflective surfaces may result in serious injury! Reflective surfaces can indirectly deflect the transmitter beams to the receiver. In this case, interruption

of the protective field is not detected.

 Determine the minimum distance a see figure 6.3.

 Make certain that all reflective surfaces are the necessary minimum distance away from the protective

field see figure 6.4and see figure 6.5.

Mounting

= 1050 mm see

a Required minimum distance to reflective surfaces [mm] b Protective field width [m] c Reflective surface

Figure 6.3: Minimum distance to reflective surfaces depending on protective field width

900 800 700 600 500 400 300 200

131

a Required minimum distance to reflective surfaces [mm] b Protective field width [m]

Figure 6.4: Minimum distance to reflective surfaces as a function of the protective field width up to 10 m

510

Leuze electronic MLD 300, MLD 500 34

Mounting

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3500 3000 2500 2000 1500 1000

500

131

20 40

a Required minimum distance to reflective surfaces [mm] b Protective field width [m]

Figure 6.5: Minimum distance to reflective surfaces as a function of the protective field width up to 70 m

Table 6.3: Formula for calculating the minimum distance to reflective surfaces

Distance (b) transmit-

Calculation of the minimum distance (a) to reflective surfaces

ter-receiver

£ 3 m a [mm] = 131

b > 3 m a [mm] = tan(2.5°)

× 1000 × b [m] = 43.66 × b [m]

6.1.6 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.

1 Transmitter 1 2 Receiver 1 3 Transmitter 2 4 Receiver 2

Figure 6.6: Optical crosstalk between adjacent safety sensors due to incorrect mounting

WARNING

With systems that are mounted spatially close to one another, a transmitter of one system can influence the receiver of the other system, thereby affecting the protective function!

 Prevent optical crosstalk between adjacent devices.

Leuze electronic MLD 300, MLD 500 35

Mounting

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 Mount adjacent devices with a shield between them or install a dividing wall to prevent mutual interfer-

ence.

 Mount the adjacent devices oppositely with respect to one another to prevent mutual interference.

1 Receiver 1 2 Transmitter 1 3 Transmitter 2 4 Receiver 2

Figure 6.7: Opposing mounting

6.2 Arrangement of the muting sensors

Muting sensors detect material and supply the signals necessary for muting. Standard IEC TS 62046 provides basic information on arranging the muting sensors. This information must be observed when mounting the muting sensors.

6.2.1 Basic information

Before you begin with the selection and mounting of the muting sensors, please note the following:

• Muting must be triggered by two independently wired muting signals and must not be fully dependent on software signals, e.g. from a PLC.

• When using a transceiver as a safety sensor and Reflection Light Beam Devices as muting sensors, electrical connections are only necessary on one end, e.g. of a conveyor line.

• Always mount muting sensors so that the minimum distance to the protective device is maintained see chapter 6.2.3 „Minimum distance for optoelectronic muting sensors“.

• Always mount the muting sensors so that the material is detected and not the transport device, e.g. the pallet.

• Material must be allowed to pass through unimpeded; people must be reliably detected.

WARNING

Unintentionally triggered muting may result in serious injury!

 Mount the muting sensors in such a way that muting cannot be unintentionally triggered by a person,

e.g. by simultaneously activating the muting sensors with a foot.

 Mount the muting indicator so that it is always visible from all sides.

Leuze electronic MLD 300, MLD 500 36

6.2.2 Selecting optoelectronic muting sensors

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Muting sensors detect material and supply the signals necessary for muting. If muting conditions are fulfilled, the safety sensor can use the signals from the muting sensors to bridge the protective function. The signals can be generated by e.g. optoelectronic sensors from Leuze electronic:

• Dark-switching Reflection Light Beam Devices

• Dark-switching One-way Light Beam Devices

• Light-switching optical scanners

6.2.3 Minimum distance for optoelectronic muting sensors

The minimum distance is the distance between the protective field of the AOPD and the detection points of the muting sensor light beams. This distance must be maintained when mounting the muting sensors to prevent the pallet or material from reaching the protective field before the muting signals can bridge the protective function of the AOPD. The minimum distance is dependent on the time needed by the system to process the muting signals.

 Depending on the given application, calculate the minimum distance for either timing controlled 2-sen-

sor muting see chapter 6.2.4 „Arrangement of the muting sensors for timing controlled 2-sensor muting“or for sequence controlled 2-sensor muting see chapter 6.2.5 „Arrangement of the muting sensors for sequence controlled 2-sensor muting“.

 When arranging the muting sensors, make certain that the calculated minimum distance to the protec-

tive field is maintained.

Mounting

6.2.4 Arrangement of the muting senso

With timing controlled 2-sensor muting, One-way or Reflection Light Beam Devices are frequently used. The material can move in both directions (see chapter 4.7.1).

Prealigned Muting Sensor Sets (accessories) for MLD safety sensors simplify the set-up of this muting solution see figure 14.13

Mounting instructions for MLD Muting Sensor Sets be downloaded on the Internet.

rs for timing controlled 2-sensor muting

Leuze electronic MLD 300, MLD 500 37

Mounting

MS1

MS2

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1 Danger zone 2 Muting transceiver 3 Passive Deflecting Mirror MS1 Muting sensor 1 MS2 Muting sensor 2 S1 Minimum distance between the protective field of the AOPD and the detection points of the muting-

sensor light beams a,b Distance between pallet and hard guard d5 Distance from the intersection point of the muting-sensor light beams to the protective-field plane

Figure 6.8: Typical arrangement of the muting sensors for timing controlled 2-sensor muting (example

acc. to IEC TS 62046)

With timing controlled 2-sensor muting, the beams from the muting sensors should intersect behind the protective field of the safety sensor, i.e. within the danger zone, to prevent muting from being triggered unintentionally.

Distances a and b between guard and pallet should be such that a person cannot enter through these openings undetected while the pallet passes through the muting zone.

Minimum distance S1

S1 [mm] = Minimum distance between the protective field of the AOPD and the detection points of

the muting-sensor light beams

v [m/s] = Speed of the material

Distance d5

d5 should be as small as practical

d5 [mm] = Distance from the intersection point of the muting-sensor

Height of the muting-sensor light beams d7

light beams to the protective-field plane

The two light beams of the muting sensors must have a minimum height of d7.

Leuze electronic MLD 300, MLD 500 38

Mounting

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Figure 6.9: Arrangement of the muting sensors at height d7  Mount the muting sensors so that the intersection point of their light beams is at the same height or high-

er than the lowest light beam of the safety sensor (d7).

This prevents—or makes more difficult—manipulation with the feet since the protective field is interrupted before the muting-sensor light beam.

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).

6.2.5 Arrangement of the muting sensors for sequence controlled 2-sensor muting

With this muting operating mode, material transport is only permissible in one direction due to the arrange- ment of the muting sensors (see chapter 4.7.2).

Pre-mounted Muting Sensor Sets (accessories) for MLD safety sensors simplify the set-up of this muting solution see figure 14.13

Mounting instructions for MLD Muting Sensor Sets be downloaded on the Internet.

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 MLD 300, MLD 500 39

Mounting

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MS2

MS1

1 Danger zone 2 Muting transceiver 3 Passive Deflecting Mirror MS1 Muting sensor 1 MS2 Muting sensor 2 a,b Distance between pallet and hard guard d2 Distance between MS1 and MS2 d5 Distance from the light-beam of MS2 vertically to the protective-field plane d8 Distance from the end of the mechanical protective device, e.g. a hard guard, to the protective field

Figure 6.10: Typical arrangement of the muting sensors for sequence controlled 2-sensor muting (exam-

ple acc. to IEC TS 62046)

Distances a and b between guard and pallet must be such that a person cannot enter through these open- ings undetected while the pallet passes through the muting zone.

Distance d5, minimum (minimum distance)

d5 [mm] = Distance from the light-beam of MS2 vertically to the protective-field plane v [m/s] = Speed of the material

Distance d5, maximum

d5 [mm] = Distance from the light-beam of MS2 vertically to the protective-field plane

Distance d2

d2 [mm] = Distance between MS1 and MS2

Leuze electronic MLD 300, MLD 500 40

Height of the muting-sensor light beams

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Figure 6.11: Arrangement of the muting sensors with respect to height

Mounting

The muting sensors should be located above the lowest beam of the safety sensor.

 Select the height of the light beams of the muting sensors so that they are above the lowest beam of

the safety sensor and detect the transport material and not the pallet or transport device.

 Otherwise, you must take additional measures to prevent people from entering the danger zone on top

of the pallet or transport device.

Distance d8 from the end of the mechanical protective device to the protective field

d8 [mm] = Distance from the end of the mechanical protective device, e.g. a hard guard, to the

protective field

[ms] = Maximum speed of the material

max

6.2.6 Arrangement of the muting sensors for timing controlled 4-sensor muting

(MLD 335, MLD 535) With this muting operating mode, material transport is permissible in both directions. The muting sensor

light beams are parallely arranged (see chapter 4.7.3). Pre-mounted Muting Sensor Sets (accessories) for MLD safety sensors simplify the set-up of this muting

solution see figure 14.13

Mounting instructions for MLD Muting Sensor Sets be downloaded on the Internet.

Leuze electronic MLD 300, MLD 500 41

Mounting

MS1

MS2

MS3

MS4

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1 Danger zone 2 Muting transceiver 3 Passive Deflecting Mirror MS1 Muting sensor 1 MS2 Muting sensor 2 MS3 Muting sensor 3 MS4 Muting sensor 4 a,b Distance between pallet and hard guard d1 Distance between MS2 and AOPD d3 Distance between MS3 and AOPD d2 Distance between MS1 and MS2 d5 Distance from the light-beam plane of MS2 vertically to the protective-field plane d8 Distance from the end of the mechanical protective device, e.g. a hard guard, to the protective field

Figure 6.12: Typical arrangement of the muting sensors for timing controlled 4-sensor muting (example

acc. to IEC TS 62046)

Distances a and b between guard and pallet must be such that a person cannot enter through these open- ings undetected while the pallet passes through the muting zone.

Distance d1

d1 [mm] = Distance from MS2 muting sensor to AOPD

Distance d3

d3 [mm] = Distance from MS3 to AOPD

Distance d2

d2 [mm] = Distance between MS1 and MS2

Distance a, b

a [mm] = Distance from the end of the mechanical protective device, e.g. a hard guard, to the protective field

Leuze electronic MLD 300, MLD 500 42

Height of the muting-sensor light beams

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The same conditions apply as with sequence controlled 2-sensor muting see figure 6.11.

 Select the height of the light beams of the muting sensors so that the transport material is detected and

not the pallet or transport device.

 Otherwise, you must take additional measures to prevent people from entering the danger zone on top

of the pallet or transport device.

6.3 Mounting the safety sensor

Proceed as follows:

• Select the type of fastening, e.g. swivel mount see chapter 6.3.2 „BT-240 swivel mount (optional)“or clamp bracket see chapter 6.3.3 „BT-P40 clamp bracket (optional)“.

• 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 „Suitable mounting locations“.

• If possible, affix safety notice stickers on the mounted safety sensor or device column.

After mounting, you can electrically connectsee chapter 7 „Electrical connection“, start up, align see chapter 8 „Setting the device into service“, and test see chapter 9.1 „Before the initial start-up and following modifications“the safety sensor.

Mounting

6.3.1 Suitable mounting locations

Area of application: mounting Tester: technician who mounts the safety sensor

Table 6.4: Checklist for mounting preparations

Check: Yes No

Do the beam heights satisfy the requirement of EN 13855 see chapter 6.1.2 „Beam heights and ranges“?

Is the safety distance to the hazard location maintained see chapter 6.1.3 „Calculating the safety distance“?

Is the minimum distance to reflective surfaces maintained see chapter 6.1.5 „Minimum distance to reflective surfaces“?

Is it impossible for safety sensors that are mounted next to one another to mutually interfere with one another see chapter 6.1.6 „Preventing mutual interference between adjacent devices“?

Can the hazard location or the danger zone only be accessed through the protective field?

Has bypassing the protective field by crawling under, reaching over, or jumping over been prevented?

Do the transmitter and receiver connections point in the same direction? Can the transmitter and receiver or transceiver and Deflecting Mirror be mounted verti-

cally (bubble level) and at the same height on a flat surface?

Can the transmitter and receiver or transceiver and Deflecting Mirror be secured in such a way that they cannot be moved or turned?

Leuze electronic MLD 300, MLD 500 43

Check: Yes No

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Is the safety sensor accessible for testing and replacing?

Is it impossible to actuate the start/restart button from within the danger zone?

Can the entire danger zone be seen from the location at which the start/restart button is mounted?

6.3.2 BT-240 swivel mount (optional)

With the swivel mount made of die-cast zinc, the safety sensor can be turned 240° on its own axis, easily aligned and reliably mounted. Two models are available: BT-240B with counterholder (for transmitter and receiver, top) and BT-240C with clamping ring (for transmitter and receiver, connection side or for Deflecting Mirror top/bottom).

Opening covers for mounting brackets on the device When using the BT-240 swivel mounts, remove the covers as follows:

 At the indicated points, press the cover until it opens on the opposite side.

 Using a pointed object or your fingernail, pry the cover loose.

The cover can be removed.

Mounting

Figure 6.13: Swivel mount BT-240B

Leuze electronic MLD 300, MLD 500 44

Figure 6.14: Swivel mount BT-240C

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Mounting

Detailed mounting instructions for the swivel mounts can be downloaded on the Internet.

6.3.3 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.

Figure 6.15: BT-P40 clamp bracket

Leuze electronic MLD 300, MLD 500 45

7 Electrical connection

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WARNING

Improper electrical connection may result in serious injury!

 Only allow competent persons to perform the electrical connection.

WARNING

Improper function selection may result in serious injury!

 For access guarding, switch on the start/restart interlock and make certain that it cannot be unlocked

from within the danger zone.

 Select the functions so that the safety sensor can be used as intended see chapter 2.1 „Approved pur-

pose and foreseeable improper operation“.

 Select the functions for the safety sensor see chapter 7.2 „Selecting contactor monitoring and start/

restart interlock“or see chapter 7.3 „Selecting the muting operating modes“.

 Always connect an external safety monitoring device (e.g. Leuze electronic MSI-T) to the receiver of

the MLD 312 and select the restart interlock in this safety monitoring device.

 If a safety sensor with an integrated AS-i interface is used, it must be ensured that the AS-i power sup-

ply unit indicates safe mains separation according to IEC 60742 and b ridges s h ort power failures o f up to 20 ms.

Electrical connection

7.1 Pin assignment transmitter and receiver

7.1.1 Standard pin assignment

Transmitter and receiver (transceiver) are equipped with M12 connectors. The transmitter has a 5-pin plug, the receiver/transceiver has a 5- or 8-pin plug, MLD 330 and MLD 530 also have a 5-pin socket.

1brown 3blue

Figure 7.1: Pin assignment transmitter MLD 300, MLD 500

1brown 2white 3blue 4black 5gray

Figure 7.2: Pin assignment receiver MLD 310,MLD 312, MLD 510

Leuze electronic MLD 300, MLD 500 46

1white

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2brown 3 green 4 yellow 5gray 6pink 7blue

Figure 7.3: Pin assignment receiver MLD 320, MLD 520

Electrical connection

1white 2brown 3 green 4 yellow 5gray 6pink 7blue 8red

Figure 7.4: MLD 330, MLD 335, MLD 530, MLD 535 receiver pin assignment

Table 7.1: Pin assignment MLD transmitter and receiver

Pin Transmit-

ter MLD 300, MLD 500

1 +24 V +24 V +24 V RES/OSSD

MLD 310, MLD 510

MLD 312, testable

MLD 320, MLD 520

status sig-

MLD 330, MLD 335, MLD 530, MLD 535

(operating mode 1, 2,

RES/OSSD status signal

MLD 330, MLD 335, MLD 530, MLD 535 (operating mode 3, 5,

RES/OSSD status signal

nal

2 Laser OSSD1 Test +24 V +24 V 0 V

3 0 V 0 V 0 V EDM EDM EDM

4 Range OSSD2 OSSD MODE MS2 MS2

5 n.c. OSSD2 OSSD2 OSSD2

6 n/a n/a n/a OSSD1 OSSD1 OSSD1

7 n/a n/a n/a 0 V 0 V +24 V

8 n/a n/a n/a n.c. M-EN/TO

a) By reversing the polarity of the supply voltage, it is possible to select from operating modes 1, 2 and 4 or 3, 5 and 6.

b) M-EN/TO ... muting-enable/muting timeout

Leuze electronic MLD 300, MLD 500 47

M-EN/TO

Electrical connection

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1brown 2white 3blue 4black 5gray

Figure 7.5: Assignment 5-pin socket - receiver MLD 330, MLD 530

1white 2brown 3 green 4 yellow 5gray 6pink 7blue 8red

Figure 7.6: Assignment 8-pin socket-MLD 335, MLD 535 receiver

Table 7.2: Pin assignment 5- or 8-pin socket (for muting sensors, muting display and start/restart/

muting restart button)

Pin MLD 330/MLD 530 (5-pin) MLD 335, MLD 535 (8-pin)

1 +24 V MS4

2MS2+24 V

30 VMS2

4MS1MS1

5 RES/LMP RES/LMP

6 --- MS3

7---0 V

8 --- ---

The operating mode for device versions MLD 320, MLD 520, MLD 330, MLD 335, MLD 530 and MLD 535 is dependent on the pin assignment of the 8-pin plug and can be changed when the device is in a de-ener- gized state. On device start-up, the software determines the parameters that have been set in this way. Type 2 device versions MLD 310, MLD 510 and MLD 312 and the transmitters are not configured.

WARNING

Muting faults may result in serious injury.

 Connect the muting signals so that they are separated and protected and a short circuit between the

cables is impossible.

Leuze electronic MLD 300, MLD 500 48

7.1.2 AS-i pin assignment

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The MLD/500 AS-i safety sensor has an interface for connecting to the safe AS-i bus and, optionally, an interface for connecting an external muting indicator.

If necessary, grounding via sliding blocks with ground contact or on the thread of the M12 connector is possible.

Figure 7.7: MLD 500/AS-i pin assignment (transmitter, receiver/transceiver, connection socket for exter-

nal muting indicator)

Table 7.3: MLD 500/AS-i pin assignment transmitter and receiver/transceiver as well as connection

socket for external muting indicator

Electrical connection

Pin Transmitter MLD 500/AS-i Receiver/transceiver

1 AS-i + AS-i + AS-i +

2 0 V (auxiliary supply)

3 AS-i - AS-i - AS-i -

4 +24 V DC (auxiliary supply)

a) may require a separate auxiliary supply depending on the power consumption of the external muting indicator

7.1.3 AS-i signal assignment

Optionally, 100 ms and 500 ms restart delay times can be set via the P0 parameter see table 7.4. The P1 parameter contains the interfering signal information delivered by the receiver/transceiver. To read out, the AS-i master must configure the P1 parameter with 1 (parameter call P1=1). If 1 is still displayed in param- eter P1 after reading back, no interference has occurred. If parameter P1 is changed to 0, a periphery fault has occurred.

The parameter port can only be addressed by the bus master. None of the signals may be used for safety-relevant purposes.

MLD 500/AS-i

Receiver/transceiver MLD 500/ AS-i with external muting indica-

tor

Table 7.4: Machine interface AS-i signal assignment (receiver/transceiver)

Assignment Bit Signal assignment

A D0 Muting indicator display (= AS-i slave)

E DI0...DI3 Code sequence in accordance with AS-i safety at work

A P0 Restart delay time 100 ms (P0=0) or 500 ms (P0=1) E P1 Interfering signal in case of interference (P1=1), e.g. due to contam-

ination or a fault in the periphery (P1=0)

Leuze electronic MLD 300, MLD 500 49

7.2 Selecting contactor monitoring and start/restart interlock

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(MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLS 535) Contactor monitoring and start/restart interlock are configured via pins 1, 3 and 4. The feedback circuit for

contactor monitoring, if selected, is connected at pin 3; the restart button for the start/restart interlock is connected at pin 1. Pin 4 configures the start/restart interlock.

Operating modes EDM and RES are configured as follows:

Table 7.5: EDM/RES configuration

Electrical connection

Pin and function

MLD 320, MLD 520

Without EDM, with-

MLD 320, MLD 330,

MLD 335

, MLD 520,

MLD 530, MLD 535

Without EDM, with RES

MLD 320, MLD 520 MLD 320, MLD 330,

MLD 335

MLD 530, MLD 535

With EDM, without RES With EDM, with RES

out RES

Pin 3, EDM +24 V +24 V 0 V via closed feed-

back circuit

Pin 4, mode Bridge to

+24 V Bridge to pin 1 +24 V

0 V via closed feedback circuit

pin 1

a) For MLD 330, MLD 335, MLD 530 and MLD 535, pin 4 does not need to be wired for RES (RES always active)

, MLD 520,

Leuze electronic MLD 300, MLD 500 50

Electrical connection

MLD300-T, MLD500-T

n.c.

-W1

-W2

643

-W1

-W2

-A2

4321

+24V

MODE

n.c.

MLD320-R, MLD520-R

+24V

EDM

RES

OSSD2

OSSD1

Safety-PLC

Safety Relay

Var. B

Var. A

-K3 -K4-K4

-K3

0V PE

+24V

PE.

+24V

0V.

14 24 42

13 23 41

-K3

L+ L+

L- L-

-S1

-K3

-K4

+24V

MSI-SR4

-A3

S22 S12 S31 S33 S34 S35

2 AOPD-

1 AOPD+

-K4

2 AOPD+

IV-0

RES-0

RES-I

+24V

-A2

-W2

-A1

OSSD2

OSSD1

MLD510-RT

MLD-M002

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Figure 7.8: Connection example MLD 320, MLD 520 (transmitter-receiver system) without EDM, with

RES (transceiver connected in an analogous manner)

Figure 7.9: Connection example MLD 510 (transceiver system) with EDM; RES in MSI-SR4 safety relay

Leuze electronic MLD 300, MLD 500 51

Electrical connection

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+24V

-W1

-A1

MLD300-T / MLD500-T

-W1

0V PE

+24V

-S1

-W2

4321

n.c.

-A2

-W2

Start

+24V

Restart

MLD320-R / MLD520-R

EDM

Var. B

-K3

MODE

OSSD2

OSSD1

Var. A

-K3

-A3

MSI-RM2

-K4-K4

-K3

-K4

14B3 Y1

12 22

-K3

L- L-

* *

-K4

L+L+

21Y2

+24V

0V PE

Figure 7.10: Connection example MLD 320, MLD 520 (transmitter-receiver system) and MSI-RM2, with

EDM and RES (transceiver connected in an analogous manner)

7.3 Selecting the muting operating modes

(MLD 330, MLD 335, MLD 530, MLD 535)

The MLD 330, MLD 335, MLD 530 and MLD 535 device versions include the following functions in addition to EDM and RES:

• Muting timeout 10 min / 8 h

• Partial muting

• Muting signal 2 as control signal (MS2 can also be connected to the 8-pin plug here)

• Muting timeout extension

• Muting restart

• Timing controlled 2-sensor muting

• Sequence controlled 2-sensor muting

These functions can be selected via the respective operating mode see table 7.6.

Leuze electronic MLD 300, MLD 500 52

Table 7.6: MLD 330, MLD 530 configuration

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Functions Operating mode selection

Operating mode

RES

EDM, selectable



Muting type

Timing controlled 2-sen-

Muting timeout

10 min

Muting timeout extension, selectable: M-T/EN/part

Muting-enable, selectable

Partial muting, selectable

Plug pin 2



+24 V 0 V Bridge to pin 4

Plug pin 7

sor muting

Electrical connection

Plug pin 1



Timing controlled 2-sen-

8 h +24 V 0 V Bridge to pin 8

sor muting



Sequence controlled 2-

10 min 0 V +24 V Bridge to pin 8

sensor muting



Sequence controlled 2-

8 h +24 V 0 V Bridge to pin 3

sensor muting



Timing controlled 2-sen-

10 min



0 V +24 V Bridge to pin 4

sor muting



Timing controlled 2-sen-

10 min



0 V +24 V Bridge to pin 3

sor muting

The desired muting operating mode is selected via pins 2 and 7 (supply voltage) as well as via a bridge between pin 1 and another pin.

Leuze electronic MLD 300, MLD 500 53

Table 7.7: MLD 335, MLD 535 configuration

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Functions Operating mode selection

Operating mode

RES

EDM, selectable



Muting type

Timing controlled 4-sen-

Muting timeout

10 min

Muting timeout extension, selectable: M-T/EN/part

Muting-enable, selectable

Partial muting, selectable

Plug pin 2



+24 V 0 V Bridge to pin 4

Plug pin 7

sor muting

Electrical connection

Plug pin 1



Timing controlled 4-sensor muting



Sequence controlled 2sensor muting



Sequence controlled 2sensor muting



Timing controlled 4-sensor muting



Timing controlled 4-sensor muting

The desired muting operating mode is selected via pins 2 and 7 (supply voltage) as well as via a bridge between pin 1 and another pin.

7.3.1 Operating mode 1 (muting):

• Start/restart interlock is selected

• Contactor monitoring is selectable

• Muting timeout extension is selectable

Table 7.8: Selection of the operating mode and other functions

8 h +24 V 0 V Bridge to pin 8

10 min 0 V +24 V Bridge to pin 8

8 h +24 V 0 V Bridge to pin 3

10 min



0 V +24 V Bridge to pin 4

0 V +24 V Bridge to pin 3

PIN Connection

Operating mode selection

2 +24 V

70 V

4 Bridge to pin 1

Other functions

Leuze electronic MLD 300, MLD 500 54

PIN Connection

MLD300-T, MLD500-T

n.c.

-W1

-W2

-W1

-W2

-A2

4321

-A1

+24V

MS2

n.c.

MLD330-R, MLD530-R

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

-K1

-K2

Var. B

Var. A

-K1

-K2

-K2-K1

MS2

321

MS1

RES/LMP

+24V

-W3

“M”

-MS1

-MS2

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1 RES (via start button at +24 V)

3 EDM (without EDM: +24 V; with EDM: 0 V via feedback circuit)

5 OSSD2

6 OSSD1

8 M-TO (muting-timeout extension)

Electrical connection

Figure 7.11: Connection example MLD 330, MLD 530 (transmitter-receiver system): timing controlled 2-

sensor muting with muting timeout 10 min (transceiver connected in an analogous manner)

Leuze electronic MLD 300, MLD 500 55

Electrical connection

MLD300-T, MLD500-T

n.c.

-W1

-W2

-W1

-W2

-A2

4321

-A1

+24V

MS2

n.c.

MLD335-R, MLD535-R

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

-K1

-K2

Var. B

Var. A

-K1

-K2

-K2-K1

+24V

321

MS1

RES/LMP

MS4

-W3

“M”

-MS2

-MS4

MS2

MS3

-MS1

-MS3

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Figure 7.12: Connection example MLD 335, MLD 535 (transmitter-receiver system): timing controlled 4-

sensor muting with muting timeout 10 min (transceiver connected in an analogous manner)

7.3.2 Operating mode 2 (muting timeout 8 h):

• Start/restart interlock is selected

• Contactor monitoring is selectable

• Muting timeout is max. 8 h

• If a second muting signal is supplied e.g. by a control, this can also be connected here at the 8-pin plug.

Table 7.9: Selection of the operating mode and other functions

PIN Connection

Operating mode selection

2 +24 V

70 V

8 Bridge to pin 1

Other functions

1 RES (via start button at +24 V)

3 EDM (without EDM: +24 V; with EDM: 0 V via feedback circuit)

4 MS2 (second muting signal can also be connected here)

5 OSSD2

6 OSSD1

Leuze electronic MLD 300, MLD 500 56

Electrical connection

MLD300-T, MLD500-T

n.c.

-W1

-W2

643

-W1

-W2

-A2

4321

-A1

+24V

MS2

n.c.

MLD330-R, MLD530-R

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

-K1

-K2

Var. B

Var. A

-K1

-K2

-K2-K1

FE FE

MS2

321

MS1

RES/LMP

+24V

-W3

“M”

-MS1

-MS2

GNBNGYBNRD

MLD300-T, MLD500-T

n.c.

-W1

-W2

-W1

-W2

-A2

4321

-A1

+24V

MS2

n.c.

MLD335-R, MLD535-R

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

-K1

-K2

Var. B

Var. A

-K1

-K2

-K2-K1

+24V

321

MS1

RES/LMP

MS4

-W3

“M”

-MS2

-MS4

MS2

MS3

-MS1

-MS3

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Figure 7.13: Connection example MLD 330, MLD 530 (transmitter-receiver system): timing controlled 2-

sensor muting with muting timeout 8 h (transceiver connected in an analogous manner)

Figure 7.14: Connection example MLD 335, MLD 535 (transmitter-receiver system): timing controlled 4-

sensor muting (transceiver connected in an analogous manner)

7.3.3 Operating mode 3 (sequence controlled 2-sensor muting):

• 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 control)

Leuze electronic MLD 300, MLD 500 57

Table 7.10: Selection of the operating mode and other functions

-W2

754 6

-W2

MS2

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

MLD300-T, MLD500-T

n.c.

-W1

-A2

4321

-A1

+24V

n.c.

MLD330-R, MLD530-R

+24V

-K1

-K2

Var. B

Var. A

-K1

-K2

-K2-K1

MS2

321

MS1

RES/LMP

+24V

-W3

“M”

-MS1

-MS2

GNBUGY

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PIN Connection

Operating mode selection

20 V

7 +24 V

8 Bridge to pin 1

Other functions

1 RES (via start button at +24 V)

3 EDM (without EDM: +24 V; with EDM: 0 V via feedback circuit)

4 MS2 (second muting signal can also be connected here)

5 OSSD2

6 OSSD1

Electrical connection

Figure 7.15: Connection example MLD 330, MLD 530 (transmitter-receiver system): sequence controlled

2-sensor muting (transceiver connected in an analogous manner)

7.3.4 Operating mode 4 (sequence controlled 2-sensor muting with muting timeout 8 h):

• 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 MLD 300, MLD 500 58

Table 7.11: Selection of the operating mode and other functions

MLD300, MLD500 - T

n.c.

-W1

-W2

-W1

-W2

-A2

4321

-A1

+24V

MS2

n.c.

MLD330, MLD530 - R

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

MS2

4321

MS1

RES/LMP

+24V

-W3

“M”

-MS1

-MS2

Safety-PLC

Safety Relay

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PIN Connection

Operating mode selection

2 +24 V

70 V

3 Bridge to pin 1

Other functions

1 RES (via start button at +24 V)

4 MS2 (second muting signal can also be connected here)

5 OSSD2

6 OSSD1

Electrical connection

Figure 7.16: Connection example MLD 330, MLD 530 (transmitter-receiver system): sequence controlled

2-sensor muting with muting timeout 8 h (transceiver connected in an analogous manner)

7.3.5 Operating mode 5 (muting-enable):

• Start/restart interlock is selected

• Contactor monitoring is selectable

• Muting timeout extension is selectable

• Muting-enable is activated

Leuze electronic MLD 300, MLD 500 59

Table 7.12: Selection of the operating mode and other functions

MLD300, MLD500 - T

n.c.

-W1

-W2

3545

-W1

-W2

-A2

4321

-A1

+24V

MS2

n.c.

MLD330, MLD530 - R

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

MS2

4321

MS1

RES/LMP

+24V

-W3

“M”

-MS1

-MS2

Safety-PLC

Safety Relay

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PIN Connection

Operating mode selection

20 V

7 +24 V

4 Bridge to pin 1

Other functions

1 RES (via start button at +24 V)

3 EDM (without EDM: +24 V; with EDM: 0 V via feedback circuit)

5 OSSD2

6 OSSD1

8 Muting-enable / M-TO (muting-timeout extension)

Electrical connection

Figure 7.17: Connection example MLD 330, MLD 530 (transmitter-receiver system): muting-enable

(transceiver connected in an analogous manner)

7.3.6 Operating mode 6 (partial muting):

• Start/restart interlock is selected

• Muting timeout extension is selectable

• 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 MLD 300, MLD 500 60

Table 7.13: Selection of the operating mode and other functions

MLD300, MLD500 - T

n.c.

-W1

-W2

3545

-W1

-W2

-A2

4321

-A1

+24V

MS2

n.c.

MLD330, MLD530 - R

+24V

EDM

RES

OSSD2

OSSD1

M-EN/TO

MS2

4321

MS1

RES/LMP

+24V

-W3

“M”

-MS1

-MS2

Safety-PLC

Safety Relay

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PIN Connection

Operating mode selection

20 V

7 +24 V

3 Bridge to pin 1

Other functions

1 RES (via start button at +24 V)

4 MS2 (second muting signal can also be connected here)

5 OSSD2

6 OSSD1

8 M-TO (muting-timeout extension)

Electrical connection

Figure 7.18: Connection example MLD 330, MLD 530 (transmitter-receiver system): partial muting (trans-

ceiver connected in an analogous manner)

Leuze electronic MLD 300, MLD 500 61

8 Setting the device into service

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WARNING

Improper use of the safety sensor may result in serious injury!

 Make certain that the entire device and the integration of the Optoelectronic Protective Device was

inspected by competent and instructed persons.

 Make certain that a dangerous process can only be started while the safety sensor is switched on.

Prerequisites:

• Safety sensor has been mounted and connected according to the instructions

• Operators have been trained in the correct use

• Dangerous process is switched off, the outputs of the safety sensor are disconnected, and the system is protected against being switched back on

 After start-up, check the function of the safety sensor see chapter 9 „Testing“.

8.1 Switching on

Requirements for the supply voltage (power supply unit):

• Reliable mains separation ensured

• Current reserve of at least 2 A available

• Start/restart interlock function connected and activated

 Switch on the safety sensor.

The safety sensor performs a brief self test.

 Check whether the green LED illuminates continuously.

The safety sensor is ready for use.

Setting the device into service

8.2 AS-i connection start-up

8.2.1 Initial start-up

Proceed as described in see chapter 8.1. If the AS-i safety sensor is correctly integrated in the cyclical data exchange of the AS-Interface, the LED2

illuminates green. AS-i safety sensor addressing occurs via the M12 connector with conventional AS-i address programming

devices.

In one AS-i network, every possible bus address (1...31) may only be used once. The transmitter does not receive a bus address.

The AS-i safety sensor is configured with asimon configuration and diagnostics software.

The asimon user's guide can be downloaded in the Internet.

NOTICE

Avoid faults when integrating the system!

 Make sure that the safety sensor OSSDs are in the ON state.

 Do not interrupt code table teach-in by interfering with the safety sensor protective field.

8.2.2 Exchange of AS-i slaves

When exchanging an AS-i safety sensor, you do not have to perform a new configuration.

Leuze electronic MLD 300, MLD 500 62

When exchanging an AS-i safety sensor, pay attention to the connecting and operating instruc-

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tions of the AS-i Safety Monitor. The connecting and operating instructions for the Leuze elec- tronic AS-i Safety Monitor ASM can be downloaded in the Internet.

 Disconnect the defective AS-i slave from the AS-i cable

The AS-i Safety Monitor stops the system.

 Press the SERVICE button on the AS-i Safety Monitor

With the first press of the SERVICE button, it is determined whether exactly one AS-i slave is missing. This is noted in the AS-i Safety Monitor fault storage. The AS-i Safety Monitor switches into configuration operation

 Install the new AS-i slave

AS-i slaves have bus address “0” in their delivery default state. When exchanging, the AS-i mas- ter automatically programs the replacement slave with the previous bus address of the defective slave. Readdressing is therefore not necessary. The LED2 of the AS-i safety sensor must illumi- nate green.

 Check the supply voltage of the sensor via the AS-Interface.

LED1 illuminates red.

 Check the protective field function on the receiver or transceiver:

For a free protective field, LED1 switches from red to green.

Setting the device into service

NOTICE

Avoid faults when integrating the system!

 Make sure that the safety sensor OSSDs are in the ON state.

 Do not interrupt code table teach-in by interfering with the safety sensor protective field.

 Press the SERVICE button on the AS-i Safety Monitor

With the second press of the SERVICE button, the code sequence of the new AS-i slave is taught in and checked for correctness. If this is okay, the AS-i Safety Monitor switches back into protec- tive mode.

 Actuate the start signal to restart the AS-i system

System restart occurs corresponding to the configuration with the restart interlock or with an automatic restart in the AS-i Safety Monitor.

 After exchanging one of the defective safe AS-i slaves, check the function of the new AS-i slave for cor-

rectness (see chapter 9.1).

8.3 Aligning the safety sensor

NOTICE

Faulty or incorrect alignment may result in an operating fault.

 The alignment performed during start-up should only be performed by qualified personnel.

 Observe the data sheets and mounting instructions for the individual components.

Prealignment

 Fasten the transmitter and receiver or transceiver and Deflecting Mirror at the same height so that the

front screens face one another.

8.4 Aligning without integrated laser alignment aid

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 MLD 300, MLD 500 63

Setting the device into service

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When using Deflecting Mirror Columns for multi-sided access guarding applications, we recom- mend using transmitter-receiver systems with integrated alignment aid see chapter 8.5 „Aligning with integrated laser alignment aid“or a laser alignment aid as an accessory (see chapter Acces- sories) for simplifying the alignment process.

Prerequisites:

• Mounting and prealignment have been performed, i.e. transmitter and receiver or transceiver and Deflecting Mirror are in a vertical position and the front screens of the devices are facing one another.

• The safety sensor is electrically connected.

• The LEDs on the light axes of the transmitter illuminate green, the LEDs and, if applicable, the 7-segment display on the receiver are also active.

 If the red LED on the receiver illuminates or for optimum adjustment (green LED is illuminated), loosen

the screws on the mounting brackets or on the device columns.

Loosen the screws only enough so that the devices or columns can just be turned.

 Turn the receiver to the left until LED1 still flashes green but does not yet illuminate red. You may also

need to carefully turn the transmitter in this direction.

 Note the value of the twist angle.

 Turn the receiver to the right until LED1 still flashes green but does not yet illuminate red. You may also

need to carefully turn the transmitter in this direction.

 Note the value of the twist angle.

 Set the optimum position of the receiver. This lies in the middle of the two values for the twist angle to

the left and right.

8.5 Aligning with integrated laser alignment aid

(MLD 300-xxL, MLD 500-xxL) To simplify the alignment of the safety sensor during start-up, the transmitters of the series mentioned

above are optionally equipped with an integrated laser alignment aid. You can use this to precisely and quickly align the transmitter and receiver and, for multi-sided access guarding, the Deflecting Mirror Columns and their individual mirrors.

Note that, for technical reasons, the individual laser beams are not 100% parallel. This does not have a negative impact on the alignment process, since the deviation from parallelity is much smaller than the conical beam expansion of the effective safety-related infrared beams emitted by the transmitter.

Leuze electronic MLD 300, MLD 500 64

Setting the device into service

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1 Transmitter 2 Device column 1 3 Device column 2 4 Receiver 5 Infrared beam 6 Laser beam

Figure 8.1: Setting up multi-sided access guarding using the integrated laser alignment aid. The trans-

mitter is best mounted in a position that features the shortest distance to the deflecting mirror column.

8.5.1 Required devices and tools

Before you start to align the components, make certain that the required devices and tools are at hand:

• Alignment templates, fixing components and MagnetKey

• Socket wrench WAF10, Allen key WAF5, hexagon wrench WAF10 for aligning transmitter and receiver in the UDC device column

• Allen key WAF6 for aligning the UDC device columns and the UMC Deflecting Mirror Columns by turning the fastening screws of the alignment base

• Allen key WAF4 for aligning the UMC Deflecting Mirror Column by adjusting the position of the individual mirrors

After you have laid out all necessary devices and tools, you can start the alignment process.

8.5.2 Aligning without UDC device columns and without UMC Deflecting Mirror Columns

Prerequisites:

• Transmitter and receiver are fastened without device columns with mounting brackets (sliding blocks or swivel mounts).

• The receiver's switching outputs to the machine have been disconnected and the system is safeguarded against being switched back on.

 Loosen the fastening screws of the mounting brackets for the transmitter and receiver.

 Switch on the transmitter and receiver.

CAUTION

Danger! Class 2 laser beams!

 Never look directly into the laser beam. This can cause damage to the eye.

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Setting the device into service

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 Activate the laser beam(s) by briefly placing the MagnetKey on the MagnetKey sensor in the transmitter

or with the corresponding switch-on signal see chapter 3.4 „Integrated laser alignment aid“.

1 Transmitter 2 Laser 3 MagnetKey 4 Beam marking

Figure 8.2: MagnetKey activation position at first light axis of the transmitter

The laser remains switched on for approx. 10 min.; then it switches off automatically. It can be reactivated at any time.

 At a smal l transmit ter-rece iver dist ance of app rox. 18 m, t he height and orientation of the transmitter are

changed by moving and, if necessary, turning, until all laser spots are incident on the reflective elements for the laser alignment aid in the receiver, causing them to illuminate brightlysee figure 8.2. During this process, turn the receiver as well if necessary.

 At a larger transmitter-receiver distance, the height and orientation of the transmitter are changed by

moving and, if necessary, turning until at least one laser spot is incident on the reflective element for the laser alignment aid in the receiver, causing it to illuminate brightly.see figure 8.2 During this process, turn the receiver as well if necessary.

Figure 8.3: Using the integrated laser alignment aid: laser beam of the transmitter is incident on the re-

1 Receiver 2 Laser beam of the transmitter 3 Reflective element for the laser alignment aid

flective element on the receiver and makes it visible from afar.

Leuze electronic MLD 300, MLD 500 66

Setting the device into service

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If a turning movement is necessary for aligning, you should use a swivel mount instead of the sliding block and other devicessee chapter 6.3.2 „BT-240 swivel mount (optional)“.

When the reflective element for the laser alignment aid is lit up by the incident laser beam, the optimum position of the transmitter relative to the receiver has been set.

 Turn the receiver to the left and right until LED1 still flashes green but does not yet illuminate red. Note

the respective values for the angle. The optimum position of the receiver lies midway between the two values (see chapter 8.4).

 Tighten the loosened fastening screws on the transmitter and receiver and check the vertical alignment

of the devices (see chapter Mounting).

8.5.3 Aligning with UDC device columns and with UMC Deflecting Mirror Columns

Alignment templates assist in aligning the Deflecting Mirror Columns.

Aligning UDC device column and first UMC Deflecting Mirror Column

Prerequisites:

• Transmitter and receiver are fastened in the UDC device columns.

• Transmitter, receiver and UMC Deflecting Mirror Columns were correctly mounted in a vertical position.

• The receiver's switching outputs to the machine are switched off and protected against being switched back on.

• The distance from the transmitter to the first Deflecting Mirror Column is less than approx. 18 m.

If the distance from the transmitter to the first Deflecting Mirror Column is greater than approx. 18 m: after the first laser beam is incident on the target mark on the alignment template, further alignment must be performed using other means, e.g. with a bubble level.

 Loosen the three fastening screws on the alignment base of the transmitter's UDC device column.

 Place the alignment template for the upper mirror on the upper individual mirror of the first UMC Deflect-

ing Mirror Column.

Leuze electronic MLD 300, MLD 500 67

Setting the device into service

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 Place the alignment templates for the lower (and middle) mirror on the lower (and middle) individual mir-

rors of the first UMC Deflecting Mirror Column.

The templates must always lie flat on the mirror.

 Switch on the transmitter and receiver.

CAUTION

Danger! Class 2 laser beams!

 Never look directly into the laser beam. This can cause damage to the eye.

 Activate the laser beam(s) by briefly placing the MagnetKey on the MagnetKey sensor in the transmitter

or with the corresponding switch-on signal see chapter 3.4 „Integrated laser alignment aid“.

1 Transmitter 2 Laser 3 MagnetKey 4

Beam marking Figure 8.4: MagnetKey activation position at first light axis of the transmitter

Leuze electronic MLD 300, MLD 500 68

Setting the device into service

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The laser remains switched on for approx. 10 min.; then it switches off automatically. It can be reactivated at any time.

 Carefully turn the UDC device column until the laser beams are incident on the target marks of the

respective alignment templates.

If necessary, also change the height by carefully moving the vertically mounted transmitter.

 Tighten the loosened fastening screws on the alignment base of the UDC device column and check the

vertical alignment of the UDC device column. If necessary, you must readjust the UDC device column.

Aligning the first and second UMC Deflecting Mirror Columns

 Place the alignment template for the upper mirror on the upper individual mirror of the second UMC

Deflecting Mirror Column.

 Place the alignment templates for the lower (and middle) mirror on the lower (and middle) individual mir-

rors of the second UMC Deflecting Mirror Column.

The templates must always lie flat on the mirror.

 Loosen the fastening screws of the alignment base on the first UMC Deflecting Mirror Column.

 Carefully turn the first UMC Deflecting Mirror Column until the upper laser beam is incident on the target

mark of the alignment template on the upper individual mirror of the second UMC Deflecting Mirror Column.

 Tighten the fastening screws on the alignment base of the first UMC Deflecting Mirror Column and

check the vertical alignment of the UMC Deflecting Mirror Column. If necessary, you must readjust the UMC Deflecting Mirror Column.

 Align the upper individual mirror of the first UMC Deflecting Mirror Column by adjusting the correspond-

ing mirror alignment screws so that the laser beam is incident on the target mark of the alignment template on the upper individual mirror of the second UMC Deflecting Mirror Column.

 Align the lower individual mirror of the first UMC Deflecting Mirror Column by adjusting the correspond-

ing mirror alignment screws so that the laser beam is incident on the target mark of the alignment template on the lower individual mirror of the second UMC Deflecting Mirror Column.

 Perform a visual inspection:

• All three mirror alignment screws on each mirror must be flush with the metal mirror plates.

• Springs must not be pushed down to the limit stop.

 Using your hand, briefly press down on the individual mirrors. Then release.

The devices must still be aligned.

Aligning other UMC Deflecting Mirror Columns

 Align the other UMC Deflecting Mirror Columns using the same method as described in “Aligning the

first and second UMC Deflecting Mirror Columns”.

 Afterwards, remove the alignment templates and store them in a safe place.

Leuze electronic MLD 300, MLD 500 69

Setting the device into service

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Aligning the last UMC Deflecting Mirror Column and receiver device in the UDC device column

 Loosen the fastening screws of the alignment base on the last UMC Deflecting Mirror Column.

 Loosen the three fastening screws on the alignment base of the receiver's UDC device column.

 Carefully turn the last UMC Deflecting Mirror Column and, if necessary, the UDC device column of the

receiver until the top laser beam is incident on the corresponding reflective element for the laser alignment aid in the receiver, causing it to illuminate brightly see figure 8.2.

 If necessary, align the upper individual mirror of the last UMC Deflecting Mirror Column by adjusting the

corresponding mirror alignment screws so that the laser beam is incident on the corresponding reflective element for the laser alignment aid in the receiver, causing it to illuminate brightly see figure 8.2.

 If necessary, align the lower individual mirror of the last UMC Deflecting Mirror Column by adjusting the

When the reflective element for the laser alignment aid is lit up by the incident laser beam, the optimum position of the transmitter relative to the receiver has been set.

 Afterwards, perform a visual inspection of the individual mirrors of the Deflecting Mirror Columns:

• All three mirror alignment screws on each mirror must be flush with the metal mirror plates.

• Springs must not be pushed down to the limit stop.

 Using your hand, briefly press down on the individual mirrors, then release. The devices must still be

aligned.

 Turn the receiver to the left and right until LED1 still flashes green but does not yet illuminate red. Note

the respective values for the angle. The optimum position of the receiver lies midway between the two values.

 Tighten the fastening screws on the alignment base of both the last UMC Deflecting Mirror Column as

well as the UDC device column of the receiver and check the vertical alignment of both the UMC Deflecting Mirror and the UDC device column of the receiver. If necessary, you must readjust the columns.

8.6 Start/restart button

The start/restart button can be used to unlock the start/restart interlock or to trigger a muting restart. In this way, the responsible person can restore normal operation of the system following process interruptions (triggering of the protective function, failure of the voltage supply, muting fault) see chapter 8.6.1 „Unlocking start/restart interlock“and see chapter 8.6.2 „Muting restart“.

8.6.1 Unlocking start/restart interlock

(MLD 320, MLD 330, MLD 335, MLD 520, MLD

WARNING

Premature unlocking of the start/restart interlock may result in serious injury! If the start/restart interlock is unlocked, the system can start-up automatically.

 Before unlocking the start/restart interlock, make certain that no people are in the danger zone.

The red and yellow LEDs illuminate as long as the restart is disabled.

 Make certain that the active protective field is clear.

 If the active protective field is not clear, select a different procedure see chapter 8.6.2 „Muting restart“.

 Make certain that there are no people in the danger zone.

 Press the start/restart button and release it again (after 0.25 … 5 s).

The receiver/transceiver switches back to the ON state.

530, MLS 535)

8.6.2 Muting restart

(MLD 330, MLD 335, MLD 530, MLD 535) If the muting indicator indicates a fault by flashing (e.g. for muting timeout, failure of the supply voltage),

the muting function can be manually triggered, and the system can be started even with the light axes of the safety sensor interrupted. In this way, the Muting path can be overridden.

Leuze electronic MLD 300, MLD 500 70

Setting the device into service

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WARNING

Premature muting restart may result in serious injury!  Make certain that the danger zone can be viewed from the start/restart button and that the entire pro-

cess can be observed by the responsible person.

 Before and during the muting restart, ensure that there are no people in the danger zone.

 Make certain that there are no people in the danger zone.

 Operate the start/restart button within the specified time as follows:

press, release, press again.

The muting function remains active after the button is pressed for the second time as long as the start/ restart button is held down. This means that the OSSDs are enabled for a maximum of 2 minutes (for sequence controlled 2-sensor muting for up to 5 s), even if no valid muting condition exists.

 Repeat the operation if necessary.

If a valid muting condition is detected after the button is pressed for the second time, the start/ restart button can be released immediately, e.g., after a conveying belt standstill due to a tem- porary voltage interruption, muting timeout or similar.

 Again release the start/restart button.

The muting indicator illuminates continuously and the system returns to normal operation. Otherwise, the OSSDs are switched off again.

A start/restart can also occur via the PLC signal (output impedance < 1.6 kΩ).

Leuze electronic MLD 300, MLD 500 71

9 Testing

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WARNING

A running machine may result in serious injury!

 Make certain that, during all conversions, maintenance work and inspections, the system is securely

shut down and protected against being restarted again.

The safety sensors must be exchanged after a maximum of 20 years.

 Always exchange entire safety sensors.

 For the tests, observe nationally applicable regulations.

 Document all tests in a comprehensible manner.

9.1 Before the initial start-up and following modifications

WARNING

Unpredictable machine behavior during initial start-up may result in serious injury!

 Make certain that there are no people in the danger zone.

Testing

Acc. to IEC TS62046 and national regulations (e.g. EU directive 89/655 EEC), tests are to be performed by competent persons in the following situations:

• Prior to the initial start-up

• Following modifications to the machine

• After longer machine downtime

• Following retrofitting or reconfiguration of the safety sensor

 Test the effectiveness of the shut-down function in all operating modes of the machine acc. to the fol-

lowing checklist.

 Document all tests in a comprehensible manner and include the configuration of the safety sensor along

with the data for the safety- and minimum distances in the documentation.

 Before they begin work, train the operators on their respective tasks. The training is the responsibility of

the operating company.

 Attach notices regarding daily testing in the respective national language of the operator on the machine

in a highly visible location, e.g. by printing out the corresponding chapter see chapter 9.3 „To be performed daily by the operator“.

 Check whether the safety sensor was correctly selected acc. to the locally applicable regulations and

directives.

 Check whether the safety sensor is operated acc. to the specified environmental conditions see

chapter 14 „Technical data“.

 Make certain that the safety sensor is protected against overcurrent.

 Perform a visual inspection for damage and test the electrical function see chapter 9.2 „To be performed

periodically by competent persons“.

Minimum requirements for the power supply unit:

• Safe mains separation

• At least 2 A current reserve

• Power-failure bridging for at least 20 ms

Not until proper function of the Optoelectronic Protective Device is ascertained may it be integrated in the control circuit of the system.

As a safety inspection, Leuze electronic offers testing by a competent person prior to the initial start-up see chapter 13 „Service and support“.

Leuze electronic MLD 300, MLD 500 72

Checklists

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The following checklists serve as a reference for the machine manufacturer or supplier. 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.

 Store the checklists with the machine documents.

9.1.1 Checklist – before the initial start-up

Tester: competent person

Table 9.1: Checklist – before the initial start-up

Check: Yes No

Were all safety directives and standards relevant to this machine type observed?

Does the Declaration of Conformity of the machine include a listing of these documents?

Does the safety sensor satisfy the safety-related capability (PL, SIL, category) as required by the risk assessment?

Circuit diagram: Are both safety-related switching outputs (OSSDs) integrated in the downstream machine control acc. to the required safety category?

Testing

Circuit diagram: Are the switching elements (e.g. contactors) with positive-guided contacts that are controlled by the safety sensor monitored by a feedback circuit (EDM)?

Does the electrical wiring match the circuit diagrams? Have the required protective measures against electrical shock been effectively imple-

mented?

Has the maximum stopping time of the machine been remeasured and recorded in the machine documents?

Is the required safety distance (protective field of the safety sensor to the next hazard location) maintained?

Are all hazardous locations of the machine accessible only through the protective field of the safety sensor? Are all additional protective devices (e.g. safety guards) correctly mounted and protected against tampering?

Is the command device for triggering the start/restart interlock of the safety sensor or the machine mounted in accordance with specifications?

Is the safety sensor correctly aligned and are all fastening screws and plugs secure?

Are safety sensor, connecting cable, plug, protection caps and command devices undamaged and without any sign of manipulation?

Has the effectiveness of the protective function been checked for all operating modes of the machine by means of a function test?

Is the start/restart button for resetting the AOPD mounted outside of the danger zone in accordance with specifications in such a way that it cannot be reached from within the danger zone? Can the entire danger zone be seen from the place at which the start/ restart button is installed?

Does the interruption of any given beam cause the dangerous movement to stop?

When the AOPD is separated from its supply voltage, does the dangerous movement stop, and, after the supply voltage has been restored, is it necessary to actuate the start/ restart button to reset the machine?

Leuze electronic MLD 300, MLD 500 73

Check: Yes No

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Is the safety sensor effective during the entire dangerous movement of the machine?

Are the notices for daily testing of the safety sensor legible to the operator and are they located in a highly visible location?

Is the muting indicator visibly mounted on the entry/exit path?

9.2 To be performed periodically by competent persons

The reliable interaction of safety sensor and machine must be periodically tested in order to detect changes to the machine or impermissible tampering with the safety sensor. Testing intervals are deter- mined by nationally applicable regulations (recommendation acc. to IEC TS62046: 6 months).

 Have all tests performed by competent persons.

 Observe the nationally applicable regulations and the time periods specified therein.

As a safety inspection, Leuze electronic offers periodic testing by a competent personsee chapter 13 „Service and support“.

Testing

9.3 To be performed daily by the operator

The function of the safety sensor must be checked daily, at change of shifts, and at each change of machine operating mode as specified in the following check list see table 9.2so that damage or unauthor- ized manipulation can be detected.

WARNING

Unpredictable machine behavior during the test may result in serious injury!

 Make certain that there are no people in the danger zone.

WARNING

Severe injuries can result if the machine is operated further when faults occur during daily testing! If you answer one of the items on the check list see table 9.2 with

operated.

 Have the entire machine inspected by a competent person see chapter 9.1 „Before the initial start-up

and following modifications“.

 Stop the dangerous state.

 Check transmitter, receiver and, if applicable, deflecting mirrors for damage or manipulation.

 Interrupt the light beam from a position outside the danger zone and ensure that the machine cannot be

started with an interrupted light beam.

 Start the machine.

 Ensure that the dangerous state is stopped as soon as a light beam is interrupted.

, the machine must no longer be

9.3.1 Check list – daily or at chang

Tester: Authorized operator or instructed person

Leuze electronic MLD 300, MLD 500 74

e of shift

Table 9.2: Check list – daily or at change of shift

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Check: Yes No Is the safety sensor aligned correctly? Are all fastening screws tightened and all connec-

tors secured? Are safety sensor, connecting cable, plug and command devices undamaged and with-

out any sign of manipulation?

Are all point of operations at the machine accessible only through one or more protective fields of safety sensors?

Are all additional protective devices mounted correctly (e.g., safety guard)?

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?

9.4 Annual testing of safe switch-off of the AS-i connection

Competent persons must check the proper function of the safe AS-i system annually, meaning the safe switch off of the AS-i Safety Monitor by triggering an assigned AS-i safety sensor.

 Trigger the AS-i safety sensor function.

Testing

Table 9.3: Checklist–annual

Check: Yes No

Does the AS-i safety sensor correctly switch off the dangerous movement after forced triggering?

Leuze electronic MLD 300, MLD 500 75

10 Maintenance

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NOTICE

Faulty operation if transmitter and receiver are soiled! The surfaces of the front screen of transmitters, receivers and, where applicable, Deflecting Mirror must

not be scratched or roughened at the positions where beams enter and exit.

 Do not use chemical cleaners.

Prerequisites for cleaning:

• The system is safely shut down and protected against restart.

 Clean the safety sensor regularly depending on the degree of contamination.

Maintenance

Leuze electronic MLD 300, MLD 500 76

11 Rectifying the fault

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11.1 What to do in case of failure?

After switching the safety sensor on, the display elements see chapter 3.3 „Display elements“assist in checking the correct functionality and in faultfinding.

In case of failure, you can determine the fault from the LED displays or read a message from the 7- segment display. With the error message you can determine the cause of the fault and initiate measures to rectifying it.

NOTICE

If the safety sensor responds with an error display, it may be defective.

 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 electronic branch responsible for you or call the

Leuze electronic customer service (see chapter 13).

11.2 Operating displays of the LEDs

LED State Cause Measure

Rectifying the fault

LED at the transmitter, per light axis

LED1 on the receiver Red, slowly flashing

LED1 on the receiver Red, flashing fast

LED1 on the receiver Green, slowly flashing

LED2 on the receiver Yellow Start/restart interlock

LED2 on the receiver (with MLD 500/AS-i)

Off Transmitter beam inac-

tive or no supply voltage

External fault Check the connection of

(approx. 1 Hz)

Internal fault If a restart is unsuccess-

(approx. 10 Hz)

Weak signal due to soil-

(approx. 1 Hz)

Off No voltage at AS-i cable Connect the AS-i power

ing and misalignment

locked

Check the power supply unit and the electrical connection. Exchange the power supply unit, if applicable.

the cables.

ful, contact customer service.

Clean the front screen and check the alignment of transmitter and receiver see chapter 8.3 „Aligning the safety sensor“.

If there are no people in the danger zone: operate the restart button.

supply unit and test the connection of the AS-i safety sensor with the ASi cable.

LED2 on the receiver (with MLD 500/AS-i)

Leuze electronic MLD 300, MLD 500 77

Red AS-i slave is not com-

municating with AS-i master

Yellow, flashing AS-i slave has invalid

address 0

Check the connection of the AS-i master with the AS-i slave or correct the AS-i address of the AS-i slave or correctly reset the AS-i profile in the AS-i master.

Assign the AS-i slave a valid address.

LED State Cause Measure

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Rectifying the fault

LED2 on the receiver (with MLD 500/AS-i)

Flashing green, red alternately

Flashing green, red simultaneously

Green AS-i slave is not com-

11.3 Error messages 7-segment display

(MLD 330, MLD 335, MLD 530, MLD 535)

Fault Cause/description Measures F[No. 0-255] Internal fault If a restart is unsuccessful, contact customer ser-

E01 Cross connection between

OSSD1 and OSSD2

E02 Overload on OSSD1 Check the wiring or exchange the connected com-

AS-i slave device fault or AS-i connection defective

Periphery fault Check the periphery for

municating with AS-i master

vice.

Check the wiring between OSSD1 and OSSD2.

ponent (reducing the load).

Exchange the AS-i safety sensor.

faults and eliminate them

E03 Overload on OSSD2 Check the wiring or exchange the connected com-

ponent (reducing the load).

E04 Short circuit against Vcc at

OSSD1

E05 Short circuit against Vcc at

OSSD2

E06 Short circuit against GND at

OSSD1

E07 Short circuit against +24 V at

OSSD1

E08 Short circuit against GND at

OSSD2

E09 Short circuit against +24 V at

OSSD2

E14 Undervoltage at supply Select a suitable current source

E15 Overvoltage at supply Select a suitable current source E19 Foreign transmitter detected Remove foreign transmitters and increase the dis-

Check the wiring. Exchange the cable, if applicable.

tance to the reflecting surfaces.

E24 Start button on connector plug

connected to 0 V

E27 Short circuit a local interface

between start button and MS1 (pin 4 and pin 5)

Leuze electronic MLD 300, MLD 500 78

Check the wiring.

Fault Cause/description Measures

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Rectifying the fault

E28 Short circuit a local interface

between start button and MS2 (pin 2 and pin 5)

E29 Start button on local interface con-

nected to 0 V

E30 Feedback contact of contactor

monitoring does not open

E31 Feedback contact of contactor

monitoring does not close

E32 Feedback contact of contactor

monitoring is not closed

E33 Feedback contact of contactor

monitoring is not open

E39 Activation time for restart button

(or muting restart button) exceeded or cable short-circuited

E80 Invalid operating mode due to

configuration error, e.g. incorrect wiring or start button pressed during startup

Check the wiring.

Check the functioning of the contactor and the cable connections. Exchange the contactor if necessary.

Press the restart button. If the restart is unsuccessful, check the wiring of the restart button.

Check the circuit diagram and the wiring and restart.

E81 Operating mode 1 changed during

operation

E82 Operating mode 2 changed during

operation

E83 Operating mode 3 changed during

operation

E84 Operating mode 4 changed during

operation

E85 Operating mode 5 changed during

operation

E86 Operating mode 6 changed during

operation

E88 Operating mode with start/restart

interlock changed during operation (for MLD 320 and MLD 520)

Check the correctness of the selected operating mode, change the operating mode if required, and restart.

E89 Operating mode without start/

restart interlock changed during operation (for MLD 320 and MLD 520)

Leuze electronic MLD 300, MLD 500 79

Check the correctness of the selected operating mode, change the operating mode if required, and restart.

Fault Cause/description Measures

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Rectifying the fault

U41 Concurrency requirement during

muting not met: second signal outside tolerance of 4 s

U42 Muting time limit exceeded Check the muting sequence. U43 No valid muting condition: Prema-

ture muting end before protective field release

U51 Only one muting signal active in

case of protective field violation, the second muting signal is missing

U54 Missing additional muting control

signal (muting-enable)

U56 Muting restart canceled Check the connections of the muting sensors and

U57 Partial muting: Topmost beam

interrupted

Check the arrangement of the muting sensors.

Select a valid muting condition.

Check the mounting of the muting sensors and the triggering of the muting signals.

Check the connection of the muting sensor and the triggering of the muting-enable signal. Reconnect the muting sensor, if applicable, and activate it with a restart.

carry out muting restart again if required.

Check the object size, e.g., pallet height. Change the operating mode (e.g., standard muting) if required and restart.

U58 Muting-enable signal fault Check whether 0 V is present at the muting-enable

U70 Weak signal Check the alignment of the safety sensor.

11.4 Multicolor indicator

Table 11.1: Meaning of the display of the multicolor indicator on the MLD 320, MLD 520

Display Meaning Measures Green, continuously illumi-

nated Red, continuously illumi-

nated

Red flashing, slowly (1 Hz) OSSD off, device error/wiring

Red flashing. quickly (10 Hz)

input or if signals have been applied for longer than 8h.

Check whether the front screens are soiled and clean them if necessary.

OSSD on none

OSSD off none

Check the wiring.

error OSSD off, internal error If a restart is unsuccessful, contact cus-

tomer service.

Green flashing, slowly (1 Hz)

Leuze electronic MLD 300, MLD 500 80

OSSD on, weak signal Check the alignment or clean the beam

exit window.

Rectifying the fault

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Table 11.2: Meaning of the display of the multicolor indicator on the MLD 330, MLD 335, MLD 530,

MLD 535

Display Meaning Measures Green, continuously illumi-

nated Red, continuously illumi-

nated White, continuously illumi-

nated

White, flashing OSSD on, muting error or no

Alternating red/white OSSD off, muting error or no

Red flashing, slowly (1 Hz) OSSD off, device error/wiring

Red flashing. quickly (10 Hz) OSSD off, internal error If a restart is unsuccessful, contact cus-

Green flashing, slowly (1 Hz)

OSSD on, no muting none

OSSD off, no muting none

OSSD on, valid muting state none

Check whether the muting timeout has

valid muting condition

error

OSSD on, weak signal Check the alignment or clean the beam

been exceeded or the concurrency condition (both muting signals within 4 s) has not been met.

Check whether the muting timeout has been exceeded or the concurrency condition (both muting signals within 4 s) has not been met.

Check the wiring.

tomer service.

exit window.

11.5 Error message query via AS-Interface

The P1 parameter which is read out by the AS-i master via the AS-i safety sensor parameter port contains interfering signal information see chapter 7.1.3 „AS-i signal assignment“.

Leuze electronic MLD 300, MLD 500 81

12 Disposing

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 For disposal observe the applicable national regulations regarding electronic components.

Disposing

Leuze electronic MLD 300, MLD 500 82

13 Service and support

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Telephone number for 24-hour standby service: +49 (0) 7021/573-0

Service hotline: +49 (0)8141 5350-111 from Monday to Thursday 8:00 a.m. to 5:00 p.m. (CET) and Friday from 8:00 a.m. to 4:00 p.m. (CET)

Service and support

Leuze electronic MLD 300, MLD 500 83

14 Technical data

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14.1 General specifications

Table 14.1: Beam/protective field data

Technical data

Beams / beam distance [mm]

Recommendation of beam heights in ac-

Transmitter/receiver range [m] Transceiver

range [m] cordance with EN ISO 13855 [mm]

1 / - - 0.5 to 70 / 20 to 100 -

2 / 500 400, 900 0.5 to 50 / 20 to 70 0.5 to 8

3 / 400 300, 700, 1100 0.5 to 50 / 20 to 70 0.5 to 6

4 / 300 300, 600, 900, 1200 0.5 to 50 / 20 to 70 -

Table 14.2: Safety-relevant technical data

MLD 312 (for

MLD 300 MLD 500

external testing)

Type in accordance with EN IEC 61496 Type 2 Type 2 Type 4

SIL in accordance with IEC 61508 - SIL 2 SIL 3

SILCL in accordance with EN IEC 62061 - SILCL 2 SILCL 3

Performance Level (PL) in accordance with

up to PL d

PL d PL e

EN ISO 13849-1

Category in accordance with EN ISO 13849-1 Cat. 2 Cat. 3 Cat. 4

Average probability of a failure to danger per hour (PFH

)

Mean time to dangerous failure (MTTF

Service life (T

a) with a respective safety monitoring device (e.g., Leuze electronic MSI-T), with DC

b) during an external test with DC > 90 %, e.g., with a MSI-T Leuze electronic safety monitoring device

)20 years

) 204 years

1.2x10

-8

1/h

1.2x10-8 1/h 6.6x10-9 1/h

³ medium

avg

Table 14.3: General system data

Connection system M12 (8-pin / 5-pin) device-dependent

Supply voltage U

, transmitter and receiver, transceiver +24 V, ± 20% (SELV)

Current consumption - transmitter 50 mA

Current consumption - receiver/transceiver 150 mA (without load)

Local socket: supply voltage, e.g., for muting sensors,

24 V, 450 mA

current consumption (max.) Common value for ext. fuse in the supply line for trans-

3 A

mitter and receiver / transceiver

Synchronization Optical between transmitter and receiver

Leuze electronic MLD 300, MLD 500 84

Technical data

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Safety class III

Protection rating IP67

Ambient temperature, operation -30 ... 55 °C

Ambient temperature, storage -40 ... 75 °C

Relative humidity (non- condensing) 0 ... 95%

Vibration fatigue limit 5 g, 10 - 55 Hz acc. to IEC/EN 60068-2-6;

amplitude 0.35 mm

Shock resistance 10 g, 16 ms in accordance with IEC/EN 60068-

2-6

Profile cross-section 52 mm x 65 mm

Dimensions See dimensional drawings

Weight see table 14.8

Table 14.4: System data - transmitter

Transmitter diodes, class acc. to EN 60825-1: 1994 +

A1: 2002 + A2: 2001

Wavelength 850 nm

Pulse duration 21.6

Pulse pause 800 ms

Power Mean power: 1.369 mW

Table 14.5: Receiver/transceiver, status signals and control signals

Voltage output, only for command devices or safety sensor

RES Input:

Output:

/EDM Input: +24 V: 10 mA

+24 V +24 V

MODE Input: Contact or transistor against

+24 V: 5 mA (pnp)

M-EN/TO

Input: +24 V: 5 mA

MS1, MS2 Input: +24 V: 5 mA

a) PM ... partial muting

b) M-EN/TO ... muting-enable/muting timeout

Leuze electronic MLD 300, MLD 500 85

Technical data

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Table 14.6: Receiver/transceiver machine interface, safety-related transistor outputs

OSSD transistor outputs 2 safety-related pnp transistor outputs (short-circuit monitored,

cross-circuit monitored)

Minimum Typical Maximum

Switching voltage high active (U

18.2 V 23 V 27.8 V

1V)

Switching voltage low 0 V 0 V +2.5 V

Switched current (per output) 2 mA 300 mA 380 mA

Leakage current < 2

mA 200 mA

Load capacity 0.3 mF

Load inductivity 2.2 H

Permissible wire resistance for load <200

Permissible wire gauge 0.25 mm

Permissible cable length between

100 m

receiver and load

Test pulse width 340

Test pulse distance (5 ms) 60 ms

OSSD restart delay time after beam

100 ms

interruption

OSSD response time 25 ms (MLD 310, MLD 312,

MLD 510, MLD 320, MLD 520) 50 ms (MLD 330, MLD 335, MLD 530, MLD 535)

a) In the event of a failure (if the 0 V-cable is interrupted), each of the outputs behaves as a 120 kW resistor to Uv. A down-

stream safety PLC must not detect this as a logical “1”.

b) Note the additional restrictions due to cable length and load current.

The safety-related transistor outputs perform the spark extinction. With transistor outputs, it is therefore not necessary to use the spark extinction circuits recommended by contactor/valve manufacturers etc. (RC modules, varistors or recovery diodes). These extend the decay times of inductive switching elements.

Table 14.7: Receiver/transceiver machine interface, AS-i safety at work

Average probability of a failure to danger per hour (PFH

)

Transmitter

-8.6x10

Receiver/transceiver without muting indicator

-9

1/h

Receiver/transceiver with internal muting indicator

Receiver/transceiver with external muting indicator

Response time - 30 ms

Slave address range - Standard slave (addresses 1...31)

IO code - 0 7

IO code - B B

Leuze electronic MLD 300, MLD 500 86

Technical data

600

48,5

500

64,7

51,5

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Transmitter

Receiver/transceiver without muting indicator

Receiver/transceiver with internal muting indicator

Receiver/transceiver with external muting indicator

ID1 code - F F

ID2 code - F 1

AS-i profile - S-0.B.F S-7.B.1

Output DO0 - - Muting indicator

on/off

Muting indicator on/ off

DO1- DO3 - - Not used Not used

DI[0-3] - Code sequence in accordance with AS-i safety at work

Current consumption from AS-i

50 mA 110 mA 140 mA 110 mA

circuit

P0 parameter - Restart delay time after beam interruption

P0 = 0 P0 = 1

 100 ms  500 ms

P1 - Error message output

P2, P3 - Not used

14.2 Dimensions, weights

Table 14.8: Weights

Number of beams

1- 0.6kg0.6kg- -

2 500 1.4 kg 1.4 kg 1.4 kg 1.4 kg

3 400 2.0 kg 2.0 kg 2.0 kg 2.0 kg

4 300 2.2 kg 2.2 kg - -

193

Figure 14.1: Dimensions of MLD, 1-beam transmitter, receiver

Beam distance Transmitter Receiver Transceiver Deflecting Mirror

51,5

64,7

Leuze electronic MLD 300, MLD 500 87

Figure 14.2: Dimensions of MLD, 2-beam transmitter, receiver

Figure 14.3: Dimensions of MLD, 3-beam transmitter, receiver

900

48,5

400 400

64,7

51,5

1000

48,5

300

300 300

64,7

51,5

600

48,5

500

64,7

51,5

900

48,5

400 400

64,7

51,5

500

594

47 47

64,7

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Figure 14.4: Dimensions of MLD, 4-beam transmitter, receiver

Technical data

Figure 14.5: Dimensions of MLD, 2-beam transceiver

Figure 14.6: Dimensions of MLD, 3-beam transceiver

Figure 14.7: Dimensions of MLD-M, 2-beam Deflecting Mirror

Leuze electronic MLD 300, MLD 500 88

Figure 14.8: Dimensions of MLD-M, 3-beam Deflecting Mirror

894

47 400 400 47

64,7

6,5

Ø34

1010

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14.3 Dimensional drawings: accessories

Technical data

a Mounting variants

Figure 14.9: Swivel mount BT-240B

Leuze electronic MLD 300, MLD 500 89

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Technical data

6,5

1010

70,5

Ø41

a Mounting variants

Figure 14.10:Swivel mount BT-240C

6,5

79,5

Leuze electronic MLD 300, MLD 500 90

Technical data

7426 2674b

87,3

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a Swivel axis b Beam distance c Alternative mounting variant

Figure 14.11:Mounting dimensions BT-240B, BT-240C

Figure 14.12:BT-P40 clamp bracket

Leuze electronic MLD 300, MLD 500 91

Figure 14.13:Muting Sensor Set, sequence controlled 2-sensor muting

341,5

35° max.

Set-AC-ML-2SA

Set-AC-ML-2SB

348

341,5

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Technical data

Figure 14.14:Set-AC-ML-2SA or Set-AC-ML-2SB mounted on MLD 500 Multiple Light Beam Safety De-

vice

Figure 14.15:Muting Sensor Set, timing controlled 4-sensor muting

Leuze electronic MLD 300, MLD 500 92

15 Ordering information and accessories

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Product designation of the safety sensor: MLDxyy-zab/t

Table 15.1: Article list

MLD Multiple Light Beam Safety Device

x Series 3 for MLD 300 or Series 5 for MLD 500

yy Function variant

00: transmitter 10: automatic restart 12: external testing 20: EDM/RES 30: muting 35: timing controlled 4-sensor muting

z Device type:

T: transmitter R: receiver RT: transceiver xT: transmitter with high range xR: receiver for high range

Ordering information and accessories

a Number of beams

bOption:

L: integrated laser alignment aid (for transmitter/receiver) M: integrated status indicator (MLD 320, MLD 520) or integrated status and muting indicator (MLD 330, MLD 335, MLD 510/A, MLD 530, MLD 535) E: Connection socket for external muting indicator (AS-i versions only)

/t Safety-related switching outputs (OSSDs), connection system

- transistor output, M12 plug A: integrated AS-i interface, M12 plug, (safety bus system)

Table 15.2: Selection examples

Product designation Features

MLD530-R1L PL e (type 4) receiver, 1-beam with laser alignment aid

MLD320-RT3 PL d (type 2), EDM/RES, transceiver, 3-beam

MLD530-R2 PL e (type 4), EDM, RES, integrated muting, receiver, 2-beam

MLD500-T2L PL e (type 4) transmitter, 2-beam with laser alignment aid

MLD-M002 Deflecting Mirror, 2-beam for transceiver

MLD510-R3LE/A PLe (type 4) receiver (3-beam) with AS-i interface as well as reflective element for

laser alignment aid and connection socket for external muting indicator

Scope of delivery

• 1x transmitter MLDxyy-Tab

• 1x receiver MLDxyy-Rab or 1x transceiver MLDxyy-RTab

• 1x Deflecting Mirror MLD-Mx

• 2x sliding blocks BT-NC for each

• 1x CD containing connecting and operating instructions

Leuze electronic MLD 300, MLD 500 93

Table 15.3: MLD 310 transmitter-receiver systems

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Ordering information and accessories

Beam distance/ number of beams

Range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

400 mm / 3 66001200 MLD300-T3 Transmitter

300 mm / 4 66001300 MLD300-T4 Transmitter

Part No. Article Description Option

66033100 MLD310-R2 Receiver

66002100 MLD300-T2L Transmitter With integrated laser alignment

66036100 MLD310-R2L Receiver With reflective element for laser

66033200 MLD310-R3 Receiver

66002200 MLD300-T3L Transmitter With integrated laser alignment

66036200 MLD310-R3L Receiver With reflective element for laser

aid

alignment aid

aid

alignment aid

66033300 MLD310-R4 Receiver

66002300 MLD300-T4L Transmitter With integrated laser alignment

66036300 MLD310-R4L Receiver With reflective element for laser

Range: 20 - 70 m

500 mm / 2 66001500 MLD300-XT2 Transmitter

66033500 MLD310-XR2 Receiver

66002500 MLD300-XT2L Transmitter With integrated laser alignment

66036500 MLD310-XR2L Receiver With reflective element for laser

400 mm / 3 66001600 MLD300-XT3 Transmitter

66033600 MLD310-XR3 Receiver

66002600 MLD300-XT3L Transmitter With integrated laser alignment

aid

alignment aid

aid

alignment aid

aid

66036600 MLD310-XR3L Receiver With reflective element for laser

alignment aid

Leuze electronic MLD 300, MLD 500 94

Ordering information and accessories

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Beam distance/ number of beams

300 mm / 4 66001700 MLD300-XT4 Transmitter

Table 15.4: MLD 310 transceiver systems

Beam distance/ number of beams

Range: 0.5 - 8 m

500 mm / 2 66500100 MLD-M002 Deflecting Mirror

Part No. Article Description Option

66033700 MLD310-XR4 Receiver

66002700 MLD300-XT4L Transmitter With integrated laser alignment

66036700 MLD310-XR4L Receiver With reflective element for laser

Part No. Article Description

66037100 MLD310-RT2 Transceiver

aid

alignment aid

Range: 0.5 - 6 m

400 mm / 3 66500200 MLD-M003 Deflecting Mirror

66037200 MLD310-RT3 Transceiver

Range: 0.5 - 8 m

400 mm / 3 66500201 MLD-XM003 Deflecting Mirror

66037200 MLD310-RT3 Transceiver

Table 15.5: MLD 312 transmitter-receiver systems

Beam distance/ number of beams

Range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

Part No. Article Description Option

66043100 MLD312-R2 Receiver

66002100 MLD300-T2L Transmitter With integrated laser alignment

aid

66046100 MLD312-R2L Receiver With reflective element for laser

alignment aid

400 mm / 3 66001200 MLD300-T3 Transmitter

66043200 MLD312-R3 Receiver

66002200 MLD300-T3L Transmitter With integrated laser alignment

aid

66046200 MLD312-R3L Receiver With reflective element for laser

alignment aid

Leuze electronic MLD 300, MLD 500 95

Ordering information and accessories

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Beam distance/ number of beams

300 mm / 4 66001300 MLD300-T4 Transmitter

Range: 20 - 70 m

500 mm / 2 66001500 MLD300-XT2 Transmitter

Part No. Article Description Option

66043300 MLD312-R4 Receiver

66002300 MLD300-T4L Transmitter With integrated laser alignment

66046300 MLD312-R4L Receiver With reflective element for laser

66043500 MLD312-XR2 Receiver

66002500 MLD300-XT2L Transmitter With integrated laser alignment

66046500 MLD312-XR2L Receiver With reflective element for laser

66001600 MLD300-XT3 Transmitter

aid

alignment aid

aid

alignment aid

66043600 MLD312-XR3 Receiver

66002600 MLD300-XT3L Transmitter With integrated laser alignment

66046600 MLD312-XR3L Receiver With reflective element for laser

300 mm / 4 66001700 MLD300-XT4 Transmitter

66043700 MLD312-XR4 Receiver

66002700 MLD300-XT4L Transmitter With integrated laser alignment

66046700 MLD312-XR4L Receiver With reflective element for laser

Table 15.6: MLD 312 transceiver systems

Beam distance/ number of beams

Range: 0.5 - 8 m

Part No. Article Description

aid

alignment aid

aid

alignment aid

500 mm / 2 66500100 MLD-M002 Deflecting Mirror

66047100 MLD312-RT2 Transceiver

Range: 0.5 - 6 m

400 mm / 3 66500200 MLD-M003 Deflecting Mirror

66047200 MLD312-RT3 Transceiver

Leuze electronic MLD 300, MLD 500 96

Ordering information and accessories

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Beam distance/ number of beams

Range: 0.5 - 8 m

400 mm / 3 66500201 MLD-XM003 Deflecting Mirror

Table 15.7: MLD 320 transmitter-receiver systems

Beam distance/ number of beams

Range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

Part No. Article Description

66047200 MLD312-RT3 Transceiver

Part No. Article Description Option

66053100 MLD320-R2 Receiver

66054100 MLD320-R2M Receiver With integrated status indicator

66002100 MLD300-T2L Transmitter With integrated laser alignment

aid

66056100 MLD320-R2L Receiver With reflective element for laser

66055100 MLD320-R2LM Receiver With reflective element for laser

400 mm / 3 66001200 MLD300-T3 Transmitter

66053200 MLD320-R3 Receiver

66054200 MLD320-R3M Receiver With integrated status indicator

66002200 MLD300-T3L Transmitter With integrated laser alignment

66056200 MLD320-R3L Receiver With reflective element for laser

66055200 MLD320-R3LM Receiver With reflective element for laser

300 mm / 4 66001300 MLD300-T4 Transmitter

66053300 MLD320-R4 Receiver

alignment aid

alignment aid and integrated status indicator

aid

alignment aid

alignment aid and integrated status indicator

66054300 MLD320-R4M Receiver With integrated status indicator

66002300 MLD300-T4L Transmitter With integrated laser alignment

aid

66056300 MLD320-R4L Receiver With reflective element for laser

alignment aid

66055300 MLD320-R4LM Receiver With reflective element for laser

alignment aid and integrated status indicator

Leuze electronic MLD 300, MLD 500 97

Ordering information and accessories

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Beam distance/ number of beams

Range: 20 - 70 m

500 mm / 2 66001500 MLD300-XT2 Transmitter

400 mm / 3 66001600 MLD300-XT3 Transmitter

Part No. Article Description Option

66053500 MLD320-XR2 Receiver

66054500 MLD320-XR2M Receiver With integrated status indicator

66002500 MLD300-XT2L Transmitter With integrated laser alignment

66056500 MLD320-XR2L Receiver With reflective element for laser

66055500 MLD320-XR2LM Receiver With reflective element for laser

66053600 MLD320-XR3 Receiver

66054600 MLD320-XR3M Receiver With integrated status indicator

aid

alignment aid

alignment aid and integrated status indicator

66002600 MLD300-XT3L Transmitter With integrated laser alignment

66056600 MLD320-XR3L Receiver With reflective element for laser

66055600 MLD320-XR3LM Receiver With reflective element for laser

300 mm / 4 66001700 MLD300-XT4 Transmitter

66053700 MLD320-XR4 Receiver

66054700 MLD320-XR4M Receiver With integrated status indicator

66002700 MLD300-XT4L Transmitter With integrated laser alignment

66056700 MLD320-XR4L Receiver With reflective element for laser

66055700 MLD320-XR4LM Receiver With reflective element for laser

aid

alignment aid

alignment aid and integrated status indicator

aid

alignment aid

alignment aid and integrated status indicator

Leuze electronic MLD 300, MLD 500 98

Table 15.8: MLD 320 transceiver systems

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Ordering information and accessories

Beam distance/ number of beams

Range: 0.5 - 8 m 500 mm / 2 66500100 MLD-M002 Deflecting Mir-

Range: 0.5 - 6 m 400 mm / 3 66500200 MLD-M003 Deflecting Mir-

Range: 0.5 - 8 m 400 mm / 3 66500201 MLD-XM003 Deflecting Mir-

Part No. Article Description Option

ror

66057100 MLD320-RT2 Transceiver

66058100 MLD320-RT2M Transceiver With integrated status indicator

ror

66057200 MLD320-RT3 Transceiver

66058200 MLD320-RT3M Transceiver With integrated status indicator

ror

66057200 MLD320-RT3 Transceiver

66058200 MLD320-RT3M Transceiver With integrated status indicator

Table 15.9: MLD 330 transmitter-receiver systems

Beam distance/ number of beams

Range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

Part No. Article Description Option

66063100 MLD330-R2 Receiver 66064100 MLD330-R2M Receiver With integrated status and mut-

66002100 MLD300-T2L Transmitter With integrated laser alignment

66066100 MLD330-R2L Receiver With reflective element for laser

66065100 MLD330-R2LM Receiver With reflective element for laser

ing indicator

aid

alignment aid

alignment aid and integrated status and muting indicator

Leuze electronic MLD 300, MLD 500 99

Ordering information and accessories

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Beam distance/ number of beams

400 mm / 3 66001200 MLD300-T3 Transmitter

300 mm / 4 66001300 MLD300-T4 Transmitter

Part No. Article Description Option

66063200 MLD330-R3 Receiver 66064200 MLD330-R3M Receiver With integrated status and mut-

66002200 MLD300-T3L Transmitter With integrated laser alignment

66066200 MLD330-R3L Receiver With reflective element for laser

66065200 MLD330-R3LM Receiver With reflective element for laser

66063300 MLD330-R4 Receiver 66064300 MLD330-R4M Receiver With integrated status and mut-

ing indicator

aid

alignment aid

alignment aid and integrated status and muting indicator

ing indicator

66002300 MLD300-T4L Transmitter With integrated laser alignment

66066300 MLD330-R4L Receiver With reflective element for laser

66065300 MLD330-R4LM Receiver With reflective element for laser

Range: 20 - 70 m

500 mm / 2 66001500 MLD300-XT2 Transmitter

66063500 MLD330-XR2 Receiver

66002500 MLD300-XT2L Transmitter With integrated laser alignment

66066500 MLD330-XR2L Receiver With reflective element for laser

400 mm / 3 66001600 MLD300-XT3 Transmitter

66063600 MLD330-XR3 Receiver

66002600 MLD300-XT3L Transmitter With integrated laser alignment

aid

alignment aid

alignment aid and integrated status and muting indicator

aid

alignment aid

aid

66066600 MLD330-XR3L Receiver With reflective element for laser

alignment aid

Leuze electronic MLD 300, MLD 500 100

Ordering information and accessories

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Beam distance/ number of beams

300 mm / 4 66001700 MLD300-XT4 Transmitter

Table 15.10: MLD 330 transceiver systems

Beam distance/ number of beams

Range: 0.5 - 8 m 500 mm / 2 66500100 MLD-M002 Deflecting Mir-

Part No. Article Description Option

66063700 MLD330-XR4 Receiver

66002700 MLD300-XT4L Transmitter With integrated laser alignment

66066700 MLD330-XR4L Receiver With reflective element for laser

Part No. Article Description Option

ror

66067100 MLD330-RT2 Transceiver

aid

alignment aid

66068100 MLD330-RT2M Transceiver With integrated status and mut-

Range: 0.5 - 6 m 400 mm / 3 66500200 MLD-M003 Deflecting Mir-

ror

66067200 MLD330-RT3 Transceiver 66068200 MLD330-RT3M Transceiver With integrated status and mut-

Range: 0.5 - 8 m 400 mm / 3 66500201 MLD-XM003 Deflecting Mir-

ror

66067200 MLD330-RT3 Transceiver 66068200 MLD330-RT3M Transceiver With integrated status and mut-

Table 15.11: MLD 335 transmitter-receiver systems

Beam distance/ number of beams

Part No. Article Description Option

ing indicator

Range: 0.5 - 50 m

Leuze electronic MLD 300, MLD 500 101

Leuze electronic MLD 300, MLD 500 Original Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual