Leuze MLD 300, MLD 500 Operating Instructions Manual

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Page 1

MLD 300, MLD 500

Multiple light beam safety devices

EN 2016/02 - 607342

We reserve the right to

make technical changes

SAFE IMPLEMENTATION AND OPERATION

Original operating instructions

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Leuze electronic MLD 300, MLD 500 2

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

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

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

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

2.1 Intended use and foreseeable misuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

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

2.2 Necessary competencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1 Start/restart interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.2 Contactor monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.3 Signal output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.4 Range switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.5 MultiScan mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.6 Periodic function test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.7 Muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.7.1 Timing controlled 2-sensor muting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.7.2 Sequence controlled 2-sensor muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.7.3 Timing controlled 4-sensor muting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.7.4 Muting timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.7.5 Muting restart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.7.6 Alternative connection for second muting signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.7.7 Muting-enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.7.8 Partial muting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.7.9 Muting operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.1 Access guarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.1 Arrangement of transmitter and receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.1.1 Arrangement of 1-beam safety sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.1.2 Beam heights and ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

6.1.3 Calculating the safety distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

6.1.4 Calculation of the safety distance for vertical protective fields with reaching over . . . . . . . . . . . . . 33

6.1.5 Minimum distance to reflective surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.1.6 Preventing mutual interference between adjacent devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.2 Arrangement of the muting sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

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6.2.1 Basic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.2.2 Selecting optoelectronic muting sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.2.3 Minimum distance for optoelectronic muting sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.2.4 Arrangement of the muting sensors for timing controlled 2-sensor muting . . . . . . . . . . . . . . . . . . . 38

6.2.5 Arrangement of the muting sensors for sequence controlled 2-sensor muting . . . . . . . . . . . . . . . . 40

6.2.6 Arrangement of the muting sensors for timing controlled 4-sensor muting . . . . . . . . . . . . . . . . . . . 42

6.3 Mounting the safety sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.3.1 Suitable mounting locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.3.2 Swivel mount BT-SET-240 (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.3.3 BT-P40 clamp bracket (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

7 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.1 Pin assignment transmitter and receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.1.1 Standard pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

7.1.2 Pin assignment of local socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

7.1.3 AS-i pin assignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.1.4 AS-i signal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.2 Selecting contactor monitoring and start/restart interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

7.3 Selecting the muting operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

7.3.1 Operating mode 1 (muting):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7.3.2 Operating mode 2 (muting timeout 100 h): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.3.3 Operating mode 3 (sequence controlled 2-sensor muting):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

7.3.4 Operating mode 4 (sequence controlled 2-sensor muting with muting timeout 100 h):. . . . . . . . . . 59

7.3.5 Operating mode 5 (muting-enable):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

7.3.6 Operating mode 6 (partial muting): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

8 Starting up the device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.1 Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.2 AS-i connection start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.2.1 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.2.2 Exchange of AS-i slaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

8.3 Aligning the safety sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

8.4 Aligning without integrated laser alignment aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8.5 Aligning with integrated laser alignment aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8.5.1 Required devices and tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.5.2 Aligning without UDC device columns and without UMC deflecting mirror columns . . . . . . . . . . . . 66

8.5.3 Aligning with UDC device columns and with UMC deflecting mirror columns . . . . . . . . . . . . . . . . . 68

8.6 Start/restart button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

8.6.1 Unlocking start/restart interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

8.6.2 Muting restart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.1 Before the initial start-up and following modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.1.1 Checklist – before the initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.2 To be performed periodically by competent persons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

9.3 Periodically by the operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

9.3.1 Checklist – periodically by the operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

9.4 Annual testing of safe switch-off of the AS-i connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

11.1 What to do in case of failure? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

11.2 Operating indicators of the LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

11.3 Error messages 7-segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

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11.4 Multicolor indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

11.5 Error message query via AS-Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

12 Disposing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

13 Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

14 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

14.1 General specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

14.2 Dimensions, weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

14.3 Dimensioned drawings: Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

15 Order guide and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

16 EC Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

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1 About this document

1.1 Used symbols and signal words

Table 1.1: Warning symbols and signal words

Symbol indicating dangers to persons

NOTE Signal word for property damage

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

About this document

CAUTION Signal word for minor injury

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

WARNING Signal word for serious 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.

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

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

MTTF Mean Time To Failure

OSSD Output Signal Switching Device

SIL Safety Integrity Level

RES Start/REStart interlock

PFH Probability of dangerous Failure per Hour

PL Performance Level

1.2 Checklists

The checklists (see chapter 9) serve as a reference for the machine manufacturer or supplier. They replace neither testing of the complete machine or system prior to initial commissioning nor their periodic testing by a qualified person Depending on the application, other tests may be necessary.

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(see chapter 2.2). The checklists contain minimum testing requirements.

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2 Safety

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 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 observe the documents applicable to your

task.

In particular, the following national and international legal regulations apply for the commissioning, tech nical inspections and work with safety sensors:

• Machinery directive 2006/42/EC

• Low voltage directive 2006/95/EC

• Electromagnetic compatibility 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

• Industrial safety regulation and employment protection act

• Product Safety Law (ProdSG)

Safety

(see table 2.1). For mounting, oper

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

2.1 Intended use and foreseeable misuse

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.

2.1.1 Intended 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 competent persons (see chapter 2.2).

• 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.

The device is intended for operation in buildings.

ascertained in the risk assessment.

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

series

Safety

Model MLD 312

MLD 300 MLD 500

(for external testing)

Type in accordance with

Type 2 Type 2 Type 4

EN IEC 61496-1, -2

SIL in accordance with IEC 61508 SIL 1 SIL 3

SILCL in accordance with

- SILCL 1 SILCL 3

EN IEC 62061

Performance Level (PL) in accor

Up to PL c

PL c 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

PFH

=1,2 x 10-8

PFHd=1,2 x 10

-8

PFHd=6,6 x 10-9

per hour

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 Leuze electronic safety monitoring device

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

204 years

³ medium

avg

• The safety sensor protects persons at access points or at points of operation of machines and sys tems.

• 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 periodically tested by persons with the necessary competence (see chapter 2.2).

• 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 mission time.

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

Faulty or incorrect alignment may result in an operating fault!

 Adjustment work with lasers must be carried out by competent and instructed persons only (see

chapter 2.2).

Leuze electronic MLD 300, MLD 500 8

Page 9

Safety

 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.

 After switch-on the laser lights up for about 10 minutes. Do not leave the installation site 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 point(see 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

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.

USA

LASERSTRAHLUNG

NICHT IN DEN STRAHL BLICKEN

LASER KLASSE 2

DIN EN 60825-1: 2008-05

Max. Leistung: Wellenlänge: 650 nm

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

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

• Danger posed by ejected objects or the spraying of hot or hazardous liquids from within the danger zone

• Applications in explosive or easily flammable atmospheres

• Reachability of the point of operation by hand from the installation site of the safety sensor

• Detection of the presence of persons in danger zones

Leuze electronic MLD 300, MLD 500 9

Page 10

2.2 Necessary competencies

The safety sensor may only be configured, installed, connected, commissioned, serviced and tested in its respective application by persons who are suitably qualified for the given task. General prerequisites for suitably qualified persons are:

• They have a suitable technical education.

• They are familiar with the relevant parts of these instructions for the safety sensor and the machine.

In addition, the minimum requirements for suitability for

• configuration are: specialist knowledge and experience in the selection and use of protective devices on machines as well as the application of technical rules and the locally valid regulations on labor protection, safety at work and safety technology.

• Mounting: specialist knowledge and experience needed for the safe and correct installation and alignment of the safety sensor with regard to the respective machine.

• Electrical installation: specialist knowledge and experience needed for the safe and correct electrical connection as well as safe integration of the safety sensor in the safety-related control system.

• Operation and maintenance: specialist knowledge and experience needed for the daily inspection and cleaning of the safety sensor – following instruction by the person responsible.

• Servicing: specialist knowledge and experience in the mounting, electrical installation and the opera tion and maintenance of the safety sensor in accordance with the requirements listed above.

• Commissioning and testing: experience and specialist knowledge in the rules and regulations of labor protection, safety at work and safety technology that are necessary for being able to assess the safety of the machine and the use of the safety sensor, including experience with and knowledge of the measuring equipment necessary for performing this work. In addition, a task related to the sub ject matter is performed in a timely manner and knowledge is kept up to date through continuous fur ther training ® Competent person in terms of the German Betriebssicherheitsverordnung (Ordinance on Industrial Safety and Health) or other national legal regulations.

Safety

2.3 Responsibility for safety

Manufacturer and operator must ensure that the machine and implemented safety sensor function 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 commissioning of the machine

The operator of the machine is responsible for:

• Instructing the operator

• Maintaining the safe operation of the machine

• Adhering to all regulations and directives for labor protection 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).

• Changes (e.g., constructional) are made to the safety sensor.

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3 Device description

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

• Performance Level PL c 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 Level SIL 1 and SIL 3 in accordance with IEC 61508 and EN IEC 62061

• Type 2 and type 4 in accordance with EN IEC 61496-1, EN 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 models satisfy laser class 1 acc. to EN 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

60825-1 and EN 62471-2006.

Transmitter Receiver/transceiver

MLD 300 MLD 310 MLD 312 MLD 320 MLD 330

MLD 335

OSSDs 2122

Automatic start/restart

RES

EDM

Signal output

LED indicator

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/

AS-i

MLD 510 MLD 520 MLD 530

MLD 535

MLD 510/ AS-i

OSSDs 2 2 2

Automatic start/restart

RES

EDM

Signal output

Leuze electronic MLD 300, MLD 500 11









Page 12

Transmitter Receiver/transceiver

Device description

LED indicator

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 510/ 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

3.2 Connection technology

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

x 90°).

Leuze electronic MLD 300, MLD 500 12

Page 13

Device description

Device models Number of pins on the

MLD 310, MLD 510 5-pin connector 5-pin connector

MLD 312 5-pin connector 5-pin connector

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

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

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

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

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

3.3 Display elements

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

receiver/transceiver

external muting indicator

(see chapter 7.1.3).

Number of pins on the transmitter

5-pin connector

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

Page 14

Table 3.3: Meaning of the LED

Receiver

LED Description

Green Transmitted beam active

Off Error (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:

Table 3.4: Additional display elements at the receiver

Device description

Receiver/transceiver

MLD 320 MLD 330 MLD 335 MLD 520 MLD 530 MLD 535

LED2 (yellow)

7-segment display

Muting indicators (optional)



 

1LED1 2 OSSD icon 3 Interface icon 4 LED2 (MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLD 535) 5 RES icon (MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLD 535) 6 Beam marking

Figure 3.4: Operation indicators on the receiver

Table 3.5: Meaning of LED1

LED1 Meaning

Red OSSD off

Green OSSD on

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Page 15

Device description

LED1 Meaning

Red, slowly flashing (approx. 1 Hz) External error (applies only for x10, 312, x20)

Red, flashing fast (approx. 10 Hz) Internal error (applies only for x10, 312, x20)

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

Table 3.6: Meaning of the LED2 displays

LED2 Meaning

Yellow Start/restart interlock locked (restart required)

Table 3.7: Meaning of LED2 for safety sensor with integrated AS-i interface (AS-i model)

LED2 Meaning

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

Green AS-i slave communicating with AS-i master

Yellow, flashing AS-i slave has invalid address 0

Red, flashing AS-i slave device error or AS-i connection defective

Red/green, flashing alternately Periphery error

Off No voltage

3.3.3 7-segment display at the receiver

(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). For the identification of the error, the error's respective letter is displayed first followed by the number code. The display is repeated cyclically. An AutoReset is carried out after 10 s, with an unauthorized restart being impossible.

Leuze electronic MLD 300, MLD 500 15

Page 16

Device description

Receiver

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

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

Table 3.8: Meaning of the 7-segment display

Display Meaning

1...6 Selected operating mode in normal operation

F... Device error, internal error

E... Interference, external error (see chapter 11)

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

8 or . Error during uploading (see chapter 11)

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 flashing

Table 3.9: Multicolor indicator

Color Meaning

chapter 11)

(see table 11.2).

Green OSSD on

Leuze electronic MLD 300, MLD 500 16

Page 17

Color Meaning

Red OSSD off

Yellow/red, alternating Restart locked

White Muting (for MLDx30 and MLDx35)

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

Device description

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

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 sensor (see table 7.1).

min and then switch off automatically (see chapter 8.5).

Leuze electronic MLD 300, MLD 500 17

Page 18

Device description

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.

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Page 19

4 Functions

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 indicator

7-segment display

2-sensor muting, timing controlled 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: with one missing muting signal: 0.1 s instead of 3 s; with two missing muting signals: 50 ms

instead of 300 ms



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

Leuze electronic MLD 300, MLD 500 19

(see chapter 8.6.1).

Page 20

4.2 Contactor monitoring

(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 the EDM input maximum 500 ms (contactors).

(see chapter 7.2). The reaction at the EDM input with respect to the OSSDs is delayed by

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

V is applied at

4.4 Range switching

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

Table 4.4: Range switching on PIN4 of the transmitter

PIN4 Operating range of the

0 V 50 m 70 m

24 V 0 to 25 m 10 to 35 m

m and 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 figure 4.1).

MLD500Tx

Operating range of the MLD500XTx

(see

When using the external test, make certain that the test duration does not exceed 150 ms.

Leuze electronic MLD 300, MLD 500 20

Page 21

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

For series connection of multiple type 2 devices (e.g. MLD 312 and type 2 protective sensors), 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 switch- ing 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 simulta neity 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 utomatically activate both sensors (within 4 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 diffuse sensors. These short signal interruptions are, therefore, filtered out for up to max. 3 300 ms). If both muting sensors are inactive simultaneously, timing controlled 2-sensor muting ends.

s). As a result, an object can be transported through the

s (MLD 335, MLD 535:

Leuze electronic MLD 300, MLD 500 21

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

Page 22

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

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 In this way transported goods can exit the protective field in a timely manner.

1 Danger zone MS1 Muting sensor 1 MS2 Muting sensor 2 t Time frame in which both muting sensors must be activated (< 8 h)

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

Functions

s. MS2 must be activated within 8 h after MS1.

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 Time frame in which both muting sensors must be activated (< 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 used when the muting sensor light beams should not cross, but

instead must be parallel, due to special application situations, e.g. with reflective materials or under disrup tive environmental conditions. For timing controlled 4-sensor muting, the four muting sensors arranged in succession must be activated in a defined and specific order to trigger muting

Leuze electronic MLD 300, MLD 500 22

(see figure 4.5).

Page 23

Functions

MS3

MS4

MS1

MS2

MS1

MS2

Muting

MS3

MS4

Muting occurs during both forward and reverse travels. The order in which the muting sensors are acti vated 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 t Time frame in which both muting sensors must be activated (4 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 (MS2) 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).

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, 100 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 possible for another 10

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 100 h

V continues to be present. After the muting timeout extension ends, muting is only

min.

Leuze electronic MLD 300, MLD 500 23

Page 24

MS1

MS2

Muting

Muting-TO

max. 10 min

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. 100 h

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 error (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

WARNING

Unmonitored overrides may result in serious injury!

 A qualified person (see chapter 2.2) must observe the procedure exactly.

 If necessary, the competent person (see chapter 2.2) must release the reset button immediately to

stop the dangerous movement.

 Make certain that the danger zone can be viewed from the reset button and that the entire process can

be observed by a responsible person.

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

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).

(see chapter 8.6.2).

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 24

Page 25

Functions

MS1

MS2

Muting

Muting-Enable

max. 8h

MS1

MS2

Muting

Muting-Enable

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 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, an error is displayed. Before mutingenable can be used, 0

PLC

MS1

V must first be applied at the muting-enable input.

V is applied

Leuze electronic MLD 300, MLD 500 25

Figure 4.9: Muting-enable

Figure 4.10: No valid muting-enable signal

Page 26

1 No muting possible here!

MS1

MS2

Muting

Muting-Enable

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 models 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 operating mode selection can be found in chapter “Electrical connection” (see chapter 7.3).

Functions

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

Functions

Operating mode

RES



EDM

Muting operating mode

Selectable Timing controlled 2-sensor muting 10 min

Selectable Timing controlled 2-sensor muting 100 H

Selectable Sequence controlled 2-sensor muting 10 min

Sequence controlled 2-sensor muting 100 H

Selectable Timing controlled 2-sensor muting 10 min

Muting timeout

Muting timeout extension





Alternative connection for second

muting signal a)Muting-enable



Partial muting

Leuze electronic MLD 300, MLD 500 26



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 switch cabinet).

Timing controlled 2-sensor muting 10 min

 

Page 27

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 switch cabinet).

EDM

Muting operating mode

Selectable Timing controlled 4-sensor muting

Selectable Sequence controlled 2-sensor muting 10 min

Sequence controlled 2-sensor muting 100 H

Selectable Timing controlled 4-sensor muting

Timing controlled 4-sensor muting

Muting timeout

10 min

100 H

10 min

Muting timeout extension





Alternative connection for second

muting signala)Muting-enable



Partial muting

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5 Applications

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

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Applications

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

ping machine

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 29

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Applications

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 processing center

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6 Mounting

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 the safety sensor to be installed by qualified persons (see chapter 2.2).

 Maintain the necessary safety distances (see chapter 6.1.3).

 Observe the relevant standards, regulations and these instructions.

 Clean the transmitter and receiver at regular intervals: environmental conditions (see chapter 14), care

(see chapter 10).

 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

• EN IEC 61496-2, "Active optoelectronic protective devices": distance of the reflecting surfaces/ deflecting mirrors

6.1.1 Arrangement of 1-beam safety sensors

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

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6.1.2 Beam heights and ranges

SKTC+= S1600 mms tatit

++850 mm+=

SKTC+=

Table 6.1: Beam heights and ranges of the device models

Mounting

Beams / beam distance [mm]

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

1 / - in accordance with

13855: 750

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 or 8

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)

Transmitter/receiver range [m] Operating range

Transceiver [m]

0.5 to 70 / 20 to 100 -

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

EN 13855:

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] = Machine stopping time

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

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

Leuze electronic MLD 300, MLD 500 32

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

Page 33

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

KT C

+=

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

[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 ta: response time of the protective device ti:

response time of the safety interface device t

[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)

ISO 13855.

: stopping time of the machine

Mounting

KxT

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

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Mounting

SKTC+=

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]

1600 1150 1150 1100 1000 900

1400 1200 1200 1100 1000 900

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 lower entry for the height of the upper beam of the

safety sensor (b).

 Search in the left column for the next higher entry for the point of operation.

 At the intersection, read the value C

If SRO > 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 of 600

mm is assumed. Beams should be placed at heights of 300 mm, 700 mm and 1100 mm from the

ms and an additional interface does not need to be used. A danger zone height

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

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Mounting

KT C

+=

KT C

+=

4°

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

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

[mm] = 750 mm

S [mm] = 1600 mm/s  0.335 s + 750 mm

[mm]= 1286 mm

mm, the value for CRO = 750 mm (see table 6.2).

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

Calculation of safety distance SRO when the height of the upper beam has changed: The height of the upper beam is now 900 mm. All other parameters remain the same. CRO = 1050 mm (see

table 6.2).

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

[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 6.4 and see figure 6.5).

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

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Page 36

Mounting

500

3500

1000

1500

2500

2000

3000

20 40

131

500

400

300

200

131

510

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

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)

Calculation of the minimum distance (a) to reflective surfaces

transmitter-receiver

 3 m a [mm] = 131

b > 3 m a [mm] = tan(2.5°)

Leuze electronic MLD 300, MLD 500 36

 1000  b [m] = 43.66  b [m]

Page 37

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

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.

 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

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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 retro-reflective photoelectric sensors 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).

• 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.

Mounting

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.

6.2.2 Selecting optoelectronic muting sensors

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 retro-reflective photoelectric sensors

• Dark-switching throughbeam photoelectric sensors

• Light-switching optical sensors

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-sensor muting (see chapter 6.2.4) or for sequence controlled 2-sensor muting (see chapter 6.2.5).

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

tive field is maintained.

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

With timing controlled 2-sensor muting, throughbeam or retro-reflective photoelectric sensors 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 solu tion (see figure 14.13).

Mounting instructions for MLD muting sensor sets can be downloaded on the Internet at http://www.leuze.com/mld/.

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Mounting

MS1

MS2

S1 v 0.05 s

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 fixed edges and the muting object (e.g. transport material) must be such that a person cannot enter through these openings undetected while the pallet passes through the muting zone. However, if it is assumed that persons are located here, the risk of crushing must be prevented, e.g. with wicket gates, which are integrated electrically into the safety circuit.

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

light beams to the protective-field plane

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

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Mounting

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

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

This prevents—or hinders—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 can be downloaded on the Internet at http://www.leuze.com/mld/.

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).

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Page 41

Mounting

d5 v 0 05s

d5 200 mm

d2 250 mm

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)

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

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Height of the muting-sensor light beams

d8 v

max

5s 200 mm–

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 can be downloaded on the Internet at http://www.leuze.com/mld/.

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Mounting

MS1

MS2

MS3

MS4

d1 200mm

d3 200mm

d2 250mm

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)

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

Leuze electronic MLD 300, MLD 500 43

Page 44

Distance a, b

a 180 mm

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

protective field

Height of the muting-sensor light beams 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) or clamp bracket (see chapter 6.3.3).

• Have a suitable tool at hand and mount the safety sensor in accordance with the notices regarding the mounting locations (see chapter 6.3.1).

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

After mounting, you can electrically connect (see chapter 7), start up, align (see chapter 8), and test (see chapter 9.1) 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)?

Is the safety distance to the point of operation maintained (see chapter 6.1.3)?

Is the minimum distance to reflective surfaces maintained (see chapter 6.1.5)?

Is it impossible for safety sensors that are mounted next to one another to mutually inter fere with one another (see chapter 6.1.6)?

Can the point of operation 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? With trans ceiver systems: do the name plates of transceiver and mirror face in the same direction?

Can the transmitter and receiver or transceiver and deflecting mirror be mounted verti

cally (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?

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Page 45

Check: Yes No

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 Swivel mount BT-SET-240 (optional)

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

Opening covers for mounting brackets on the device When using the BT-SET-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-SET-240B

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Page 46

Figure 6.14: Swivel mount BT-SET-240C

Mounting

Detailed mounting instructions for the swivel mounts can be downloaded on the Internet at http://www.leuze.com/mld/

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

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7 Electrical connection

WARNING

Improper electrical connection may result in serious injury!

 Only allow competent persons (see chapter 2.2) 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).

 Select the functions for the safety sensor (see chapter 7.2 or see chapter 7.3).

 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 bridges s hort power failures of up to 20 ms.

Electrical connection

NOTICE

Laying cables!

 Lay all connection cables and signal lines within the electrical installation space or permanently in

cable ducts.

 Lay the cables and lines so that they are protected against external damages.

 For further information: see EN ISO 13849-2, Table D.4.

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 and MLD 535 have an 8-pin socket. This is used for connecting the signals of the muting sensors. Alter natively, the sensors can be directly connected via the AC-SCMx connection box. The socket is A-coded.

1Brown 3Blue

Figure 7.1: Pin assignment transmitter MLD 300, MLD 500

330 and MLD 530 also have a 5-pin socket, MLD 335

1Brown 2White 3Blue 4Black 5Gray

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

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Page 48

Electrical connection

1White 2Brown 3Green 4 Yellow 5Gray 6Pink 7Blue 8Red

Figure 7.3: Pin assignment receiver MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLD 535

Table 7.1: Pin assignment MLD transmitter and receiver

Pin Color Transmit

ter MLD 300, MLD 500

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

MLD 310, MLD 510

MLD 312, testable

MLD 320, MLD 520

status

MLD 330, MLD 335, MLD 530, MLD 535 (operat ing mode 1, 2, 4)

RES/OSSD status signal

MLD 330, MLD 335, MLD 530,

MLD 535 (operat ing mode 3, 5, 6)

RES/OSSD status signal

signal

2BrownLaser OSSD1 Test +24 V +24 V 0 V

3Green0 V0 V0 VEDMEDM EDM

4Yel

Range OSSD2 OSSD MODE MS2 (optional) MS2 (optional)

low

5 Gray n.c. OSSD2 OSSD2 OSSD2

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

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

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

M-EN/TO

a) M-EN/TO ... Muting-Enable/-Timeout

The operating mode for device models 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 models MLD

Leuze electronic MLD 300, MLD 500 48

310, MLD 510 and MLD 312 and the transmitters are not configured.

Page 49

7.1.2 Pin assignment of local socket

1Brown 2White 3Blue 4Black 5Gray

Figure 7.4: Assignment 5-pin socket - receiver MLD 330, MLD 530

Electrical connection

1White 2Brown 3Green 4 Yellow 5Gray 6Pink 7Blue 8Red

Figure 7.5: Assignment 8-pin socket - receiver MLD 335, MLD 535

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 --- ---

WARNING

Impairment of the protective function due to faulty muting signals

 The ground connection of receiver/transceiver MLD x30/MLDx335 must be wired between the ground

connections of muting signals MS1 and MS2. For the muting sensors and the safety sensor, a shared power supply unit is to be used. The connection lines of the muting sensors must be laid separated from one another and protected.

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7.1.3 AS-i pin assignment

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.

Electrical connection

Figure 7.6: 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

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) A separate auxiliary supply may be necessary depending on the power consumption of the external muting indicator

7.1.4 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 parameter P1 after reading back, no interference has occurred. If parameter P1 is changed to 0, a periphery error has occurred.

MLD 500/AS-i

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

tor

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

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 after beam interruption

P0 = 0 P0 = 1

100 ms 500 ms

E P1 Interfering signal in case of interference (P1=1), e.g. due to contam

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

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7.2 Selecting contactor monitoring and start/restart interlock

(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 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

3; the restart button for the start/restart interlock is

Electrical connection

Pin and func tion

MLD 320, MLD 520

Without EDM, with

MLD 320, MLD 330 a), MLD 335

MLD 530

, MLD 520,

, 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

feedback 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,

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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

+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

* Optional: reset via PLC or RES button

Figure 7.7: Connection example MLD 320, MLD 520 (transmitter-receiver system) without EDM, with

RES (transceiver connected in an analogous manner)

Figure 7.8: Connection example MLD 510 (transceiver system) with EDM; RES in MSI-SR4 safety relay

Leuze electronic MLD 300, MLD 500 52

Page 53

Electrical connection

+24V

-S1

-W1

-W2

-K3

L+L+

-K4

-A1

+24V

MLD300-T / MLD500-T

-W1

0V PE

4321

n.c.

-A2

-W2

Start

EDM

+24V

MODE

Restart

MLD320-R / MLD520-R

Var. B

-K3

OSSD1

OSSD2

Var. A

-K3

-A3

MSI-RM2

12 22

-K3

-K4

21Y2

14B3 Y1

-K4-K4

L- L-

0V PE

Figure 7.9: 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 models include the following functions in addition to EDM and RES:

• Muting timeout 10 min / 100 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).

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Table 7.6: MLD 330, MLD 530 configuration

Functions Operating mode selection

Operating mode

RES

EDM, selectable



Muting type

Timing controlled

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

2-sensor muting

Electrical connection

Plug pin 1



Timing controlled

100 H +24 V 0 V Bridge to pin 8

2-sensor muting



Sequence controlled

10 min 0 V +24 V Bridge to pin 8

2-sensor muting



Sequence controlled

100 H +24 V 0 V Bridge to pin 3

2-sensor muting



Timing controlled

10 min



0 V +24 V Bridge to pin 4

2-sensor muting



Timing controlled

10 min



0 V +24 V Bridge to pin 3

2-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.

Table 7.7: MLD 335, MLD 535 configuration

Functions Operating mode selection

Operating mode

RES

EDM, selectable



Muting type

Timing controlled

Muting timeout

10 min

Muting timeout extension,

selectable: M-T/EN/part

Muting-enable, selectable



Partial muting, selectable

Plug pin 2

Plug pin 7

Plug pin 1

+24 V 0 V Bridge to pin 4

4-sensor muting



Timing controlled

100 H +24 V 0 V Bridge to pin 8

4-sensor muting



Sequence controlled

10 min 0 V +24 V Bridge to pin 8

2-sensor muting

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Functions Operating mode selection

Operating mode

RES

EDM, selectable

Muting type



Sequence controlled

Muting timeout

Muting timeout extension,

selectable: M-T/EN/part

Muting-enable, selectable

Partial muting, selectable

Plug pin 2

Plug pin 7

100 H +24 V 0 V Bridge to pin 3

2-sensor muting

Electrical connection

Plug pin 1



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

PIN Connection

Operating mode selection

2 +24 V

70 V

4 Bridge to pin 1

10 min



0 V +24 V Bridge to pin 4

0 V +24 V Bridge to pin 3

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 M-TO (muting-timeout extension)

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Electrical 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

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

Figure 7.10: Connection example MLD 330, MLD 530 (transmitter-receiver system): timing controlled

2-sensor muting with muting timeout 10 min (transceiver connected in an analogous man ner)

Figure 7.11: Connection example MLD 335, MLD 535 (transmitter-receiver system): timing controlled

4-sensor muting with muting timeout 10 min (transceiver connected in an analogous man ner)

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7.3.2 Operating mode 2 (muting timeout 100 h):

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

• Start/restart interlock is selected

• Contactor monitoring is selectable

• Muting timeout is max. 100 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)

Electrical connection

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

Figure 7.12: Connection example MLD 330, MLD 530 (transmitter-receiver system): timing controlled

2-sensor muting with muting timeout 100 h (transceiver connected in an analogous manner)

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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

Figure 7.13: 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 con trol)

Table 7.10: Selection of the operating mode and other functions

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

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Electrical connection

-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

Figure 7.14: 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 100 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.

Table 7.11: Selection of the operating mode and other functions

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

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Electrical connection

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

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

2-sensor muting with muting timeout 100 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

Table 7.12: Selection of the operating mode and other functions

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)

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Electrical connection

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

Figure 7.16: 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.

Table 7.13: Selection of the operating mode and other functions

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)

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Electrical connection

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

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

ceiver connected in an analogous manner)

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8 Starting up the device

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 (see chapter 2.2).

 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 sys tem is protected against being switched back on

 After start-up, check the function of the safety sensor (see chapter 9).

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

Starting up the device

Make certain that the system cannot start up on its own.

 Switch on the voltage supply 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.

8.2 AS-i connection start-up

8.2.1 Initial commissioning

Proceed as described in 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 from the Internet at www.leuze.com/asi.

NOTICE

Avoid errors 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.

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8.2.2 Exchange of AS-i slaves

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

When exchanging an AS-i safety sensor, pay attention to the connecting and operating instruc- tions of the AS-i safety monitor. The connecting and operating instructions for the Leuze electronic AS-i safety monitor ASM can be downloaded from the Internet at www.leuze.com/asi.

 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 error 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.

Starting up the device

 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.

NOTICE

Avoid errors 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 a defective safe AS-i slaves, check the function of the new AS-i slave for correctness

(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 of 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.

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Make certain that both connections point downward.

With transceiver systems: make certain that the name plate on transceiver and mirror are located on the same side.

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.

When using deflecting mirror columns for multi-sided access guarding, we recommend using transmitter-receiver systems with integrated alignment aid (see chapter 8.5) or a laser alignment aid as an accessory (see chapter Accessories) 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.

Starting up the device

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 of the laser beams from parallelity is much smaller than the conical beam expansion of the effective safety-related infra- red beams emitted by the transmitter.

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Starting up the device

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, mounting devices 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 individ

ual 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 safe

guarded 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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Starting up the device

 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).

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 transmi tter-rec eiver dis t ance of ap prox. 18 m , the 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 brightly (see 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 laser alignment aid

flective element on the receiver and makes it visible from afar

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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 devices (see chapter 6.3.2).

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 columns

Prerequisites:

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

• Transmitter, receiver and UMC deflecting mirror columns were correctly mounted in a vertical posi tion.

• 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.

Starting up the device

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 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.

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Starting up the device

 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).

1 Transmitter 2 Laser 3 MagnetKey 4 Beam marking

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

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Starting up the device

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 col umn.

 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 corresponding

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 t h e first UMC deflectin g m irror column by adjusting the corresponding

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.

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Starting up the device

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 align ment 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 reflec tive 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 deflect ing 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) chapter 8.6.2).

8.6.1 Unlocking start/restart interlock

(MLD 320, MLD 330, MLD 335, MLD 520, MLD 530, MLS 535)

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.

The yellow LED only illuminates if the protective field is clear.

 If the active protective field is not clear, select a different procedure (see chapter 8.6.2).

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

 Press the start/restart button and release it again (after 0.15 … 4 s).

The receiver/transceiver switches back to the ON state.

(see chapter 8.6.1 and see

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8.6.2 Muting restart

(MLD 330, MLD 335, MLD 530, MLD 535) If the muting indicator indicates an error 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.

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 sequence controlled 2-sensor muting for up to 5

 Repeat the operation if necessary.

Starting up the device

minutes (for

s), even if no valid muting condition exists.

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).

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9 Testing

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.

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 (see chapter

• Prior to the initial start-up

• Following modification 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 notes 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).

 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).

 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).

Minimum requirements for the power supply unit:

2.2) in the following situations:

• 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 com- missioning (see chapter 13).

Checklists 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 initial commissioning nor their periodic testing

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by a qualified person (see chapter 2.2). 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: Persons with the necessary competence (see chapter 2.2)

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 con

tacts that are controlled by the safety sensor monitored by an external device monitoring 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 point of operation) 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 tampering?

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?

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Check: Yes No

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).

 Only allow testing to be performed by qualified persons (see chapter 2.2).

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

As a safety inspection, Leuze electronic offers periodic testing by a competent person (see chapter 13).

Testing

9.3 Periodically by the operator

The function of the safety sensor must be checked periodically depending on the given risk according to the following checklist so that damages or prohibited tampering can be detected.

Depending on the risk assessment, the test cycle must be defined by the integrator or operating company (e.g., daily, on shift changes, liability insurance association and may be dependent on the machine type.

Due to complex machines and processes, it may be necessary under certain circumstances to check some points at longer time intervals. Observe the classification in “Test at least” and “Test when possible”.

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 periodic testing! If you answer one of the items on the checklist (see table 9.2) with

operated.

 Only allow the machine to be tested by persons with the necessary competence (see chapter 2.2, see

chapter 9.1).

 Stop the dangerous state.

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

 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.

...) or is specified by national regulations or regulations of the employer's

, the machine must no longer be

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9.3.1 Checklist – periodically by the operator

Table 9.2: Checklist – regular function test by trained operators/persons

Test at least: Yes No

Testing

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 tampering?

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)?

When possible, test during running operation: Yes No

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 (see chapter 2.2) 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.

Table 9.3: Checklist – annual

Check: Yes No

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

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10 Maintenance

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

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11 Troubleshooting

11.1 What to do in case of failure?

After switching the safety sensor on, the display elements (see chapter 3.3) 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 error 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 indicators of the LEDs

LED State Cause Measure

Troubleshooting

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 error Check the connection of

(approx. 1 Hz)

Internal error In the event of an unsuc

(approx. 10 Hz)

Weak signal due to soil

(approx. 1 Hz)

Off No voltage on AS-i

ing and misalignment

locked

cable

Check the power supply unit and the electrical con nection. Exchange the power supply unit, if appli cable.

the cables.

cessful restart, contact customer service.

Clean the front screen and check the alignment of transmitter and receiver (see chapter 8.3).

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

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

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

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Red AS-i slave not communi

cating 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 again correctly set the AS-i profile in the AS-i master.

Assign the AS-i slave a valid address.

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LED State Cause Measure

Troubleshooting

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

LED2 on the receiver

Red/green, flashing alternately

Green, flashing red at the same time

Green AS-i slave communicat

(with MLD 500/AS-i)

11.3 Error messages 7-segment display

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

Error Cause/description Measures

F[No. 0-255] Internal error In the event of an unsuccessful restart, contact cus

E01 Cross connection between

OSSD1 and OSSD2

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

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

AS-i slave device error or AS-i connection

Exchange the AS-i safety sensor.

defective

Periphery error Check the periphery for

errors and eliminate them

None

ing with AS-i master

tomer service.

Check the wiring between OSSD1 and OSSD2.

ponent (reducing the load).

E04 Short-circuit against Vcc at

Check the wiring. Exchange the cable, if applicable.

OSSD1

E05 Short-circuit against Vcc at

Check the wiring. Exchange the cable, if applicable.

OSSD2

E06 Short circuit against GND at

Check the wiring. Exchange the cable, if applicable.

OSSD1

E07 Short circuit against +24 V at

Check the wiring. Exchange the cable, if applicable.

OSSD1

E08 Short circuit against GND at

Check the wiring. Exchange the cable, if applicable.

OSSD2

E09 Short circuit against +24 V at

Check the wiring. Exchange the cable, if applicable.

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

tance to the reflective surfaces.

E24 Start button on connector plug

Check the wiring.

connected to 0 V

E27 Short-circuit a local interface

Check the wiring. between start button and MS1 (pin 4 and pin 5)

E28 Short-circuit a local interface

Check the wiring. between start button and MS2 (pin 2 and pin 5)

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Error Cause/description Measures

Troubleshooting

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 dur ing startup

E81 Operating mode 1 changed during

operation

Check the wiring.

Check the functioning of the contactor and the cable

connections. Exchange the contactor if necessary.

Check the functioning of the contactor and the cable

connections. Exchange the contactor if necessary.

Check the functioning of the contactor and the cable

connections. Exchange the contactor if necessary.

Check the functioning of the contactor and the cable

connections. Exchange the contactor if necessary.

Press the restart button. If the restart is unsuccess

ful, check the wiring of the restart button.

Check the circuit diagram and the wiring and restart.

Check the correctness of the selected operating

mode, change the operating mode if required, and

restart.

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 opera

tion (for MLD 320 and MLD 520)

E89 Operating mode without 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.

Check the correctness of the selected operating

mode, change the operating mode if required, and

restart.

Check the correctness of the selected operating

mode, change the operating mode if required, and

restart.

Check the correctness of the selected operating

mode, change the operating mode if required, and

restart.

Check the correctness of the selected operating

mode, change the operating mode if required, and

restart.

Check the correctness of the selected operating

mode, change the operating mode if required, and

restart.

Check the correctness of the selected operating

mode, change the operating mode if required, and

restart.

U40 Operating mode 3 if MS2 and

MS1 are activated

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Check the arrangement and the assignment of the

muting sensors.

Page 81

Error Cause/description Measures

Troubleshooting

U41 Simultaneity condition during mut

Check the arrangement of the muting sensors. ing not met: second signal outside tolerance of 4 s

U42 Muting time limit exceeded Check the muting sequence.

U43 No valid muting condition: Prema

Select a valid muting condition. ture muting end before protective field release

U51 Only one muting signal active in

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

Check the mounting of the muting sensors and the

triggering of the muting signals.

ing

U54 Missing additional muting control

signal (muting-enable)

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.

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

carry out muting restart again if required.

U57 Partial muting: topmost beam

interrupted

Check the object size, e.g., pallet height. Change

the operating mode (e.g., standard muting) if

required and restart.

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

U70 Weak signal Check the alignment of the safety sensor.

8 or . Error during uploading Disconnect the device from the voltage supply for

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 illuminated

Red, continuously illuminated

Yellow/red, alternating Internal restart locked Actuate the reset button

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

input or if signals have been applied for longer than

8h.

Check whether the front screens are soiled and

clean them if necessary.

5 s.

OSSD on None

OSSD off None

Check the wiring.

error

Red flashing, fast (10 Hz) OSSD off, internal error In the event of an unsuccessful restart,

contact customer service.

Green flashing, slowly (1 Hz)

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

exit windows.

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Troubleshooting

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

OSSD on, no muting None

illuminated

Red, continuously

OSSD off, no muting None

illuminated

Yellow/red, alternating Internal restart locked Actuate the reset button

White, continuously

OSSD on, valid muting state None

illuminated

White, flashing OSSD on, muting error or no

valid muting condition

Check whether the muting timeout has been exceeded or the simultaneity condi tion (both muting signals within 4 s) has not been met.

Red/white, alternating OSSD off, muting error or no

valid muting condition

Check whether the muting timeout has been exceeded or the simultaneity condi tion (both muting signals within 4 s) has not been met.

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

Check the wiring.

error

Red flashing, fast (10 Hz) OSSD off, internal error In the event of an unsuccessful restart,

contact customer service.

Green flashing, slowly

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

(1 Hz)

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 7.1.4).

exit windows.

Leuze electronic MLD 300, MLD 500 82

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12 Disposing

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

Disposing

Leuze electronic MLD 300, MLD 500 83

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13 Service and support

24-hour on-call service at: +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)

E-mail: service.protect@leuze.de Return address for repairs: Service Center Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen / Germany

Service and support

Leuze electronic MLD 300, MLD 500 84

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14 Technical data

14.1 General specifications

Table 14.1: Beam/protective field data

Technical data

Beams / beam distance [mm]

Recommendation of beam heights in

Transmitter/receiver range [m] Operating range

Transceiver [m] accordance 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 1 SIL 3

SILCL in accordance with EN IEC 62061 - SILCL 1 SILCL 3

Performance Level (PL) in accordance with

Up to PL c

PL c PL e

EN ISO 13849-1

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

-8

Average probability of a failure to danger per hour (PFH

)

Mean time to dangerous failure (MTTF

Mission time (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

1/h

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

³ medium

avg

Table 14.3: General system data

Connection technology 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 85

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Technical data

Safety class III

Degree of protection IP67

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

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

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

Vibration resistance 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

Power Mean power: 1.369

s

W

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/-Timeout

Leuze electronic MLD 300, MLD 500 86

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Technical data

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

- 1V)

18.2 V 23 V 27.8 V

Switching voltage low 0 V 0 V +2.5 V

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

Leakage current <2

A 200 A

Load capacity 0.3 F

Load inductivity 2.2 H

Permissible wire resistance for load <200

Permissible conductor cross section 0.25 mm

Permissible cable length between



100 m

receiver and load

Test pulse width 340

s

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 k 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 elements, 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

Transmitter Receiver/trans

ceiver without muting indicator

Receiver/trans ceiver with inter nal muting

Receiver/trans

ceiver with external muting indicator

indicator

Average probability of a failure to danger per hour (PFH

)

-8.6x10

-9

1/h

Response time - 30 ms

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

IO code - 0 7

Leuze electronic MLD 300, MLD 500 87

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Technical data

51,5

193

64,7

Transmitter Receiver/trans

ceiver without muting indicator

Receiver/trans ceiver with inter nal muting

Receiver/trans

ceiver with external muting indicator

indicator

ID code - B B

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

Parameter P0 - 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 - 0.6 kg 0.6 kg - -

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 - -

Beam spacing Transmitter Receiver Transceiver Deflecting mirrors

P0 = 0 P0 = 1

no interference interference, e.g. caused by soiling, or periph

eral error

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

Leuze electronic MLD 300, MLD 500 88

Page 89

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

600

48,5

500

64,7

51,5

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

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

Technical data

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

Figure 14.5: Dimensions of MLD, 2-beam transceiver

Figure 14.6: Dimensions of MLD, 3-beam transceiver

Leuze electronic MLD 300, MLD 500 89

Page 90

Figure 14.7: Dimensions of MLD-M, 2-beam deflecting mirror

500

594

47 47

64,7

894

47 400 400 47

64,7

6,5

Ø34

1010

Figure 14.8: Dimensions of MLD-M, 3-beam deflecting mirror

Technical data

14.3 Dimensioned drawings: Accessories

Figure 14.9: Swivel mount BT-240B

Leuze electronic MLD 300, MLD 500 90

a Mounting variants

Page 91

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 91

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Technical data

7426 2674b

87,3

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 92

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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

Technical data

Figure 14.14: Set-AC-ML-2SA or Set-AC-ML-2SB mounted on MLD 500 multiple light beam safety

device

Figure 14.15: Muting sensor set, timing controlled 4-sensor muting

Leuze electronic MLD 300, MLD 500 93

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15 Order guide and accessories

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

Table 15.1: Part number code

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

Order guide 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 models only)

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

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

Table 15.2: Selection examples

Product designation Properties

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

MLD320-RT3 PL c (Typ 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 PL e (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 94

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Table 15.3: MLD 310 transmitter-receiver systems

Order guide and accessories

Beam distance/

Part no. Article Description Option number of beams

Operating range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

66033100 MLD310-R2 Receiver

66002100 MLD300-T2L Transmitter With integrated laser alignment

66036100 MLD310-R2L Receiver With reflective element for laser

400 mm / 3 66001200 MLD300-T3 Transmitter

66033200 MLD310-R3 Receiver

66002200 MLD300-T3L Transmitter With integrated laser alignment

66036200 MLD310-R3L Receiver With reflective element for laser

300 mm / 4 66001300 MLD300-T4 Transmitter

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

Operating 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 95

Page 96

Order guide and accessories

Beam distance/

Part no. Article Description Option number of beams

300 mm / 4 66001700 MLD300-XT4 Transmitter

66033700 MLD310-XR4 Receiver

66002700 MLD300-XT4L Transmitter With integrated laser alignment

66036700 MLD310-XR4L Receiver With reflective element for laser

Table 15.4: MLD 310 transceiver systems

Beam distance/

Part no. Article Description number of beams

Operating range: 0.5 - 8 m

500 mm / 2 66500100 MLD-M002 Deflecting mirror

66037100 MLD310-RT2 Transceiver

aid

alignment aid

Operating range: 0.5 - 6 m

400 mm / 3 66500200 MLD-M003 Deflecting mirror

66037200 MLD310-RT3 Transceiver

Operating range: 0.5 - 8 m

400 mm / 3 66500201 MLD-XM03 Deflecting mirror

66037200 MLD310-RT3 Transceiver

Table 15.5: MLD 312 transmitter-receiver systems

Beam distance/

Part no. Article Description Option number of beams

Operating range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

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 96

Page 97

Order guide and accessories

Beam distance/

Part no. Article Description Option number of beams

300 mm / 4 66001300 MLD300-T4 Transmitter

66043300 MLD312-R4 Receiver

66002300 MLD300-T4L Transmitter With integrated laser alignment

66046300 MLD312-R4L Receiver With reflective element for laser

Operating range: 20 - 70 m

500 mm / 2 66001500 MLD300-XT2 Transmitter

66043500 MLD312-XR2 Receiver

66002500 MLD300-XT2L Transmitter With integrated laser alignment

66046500 MLD312-XR2L Receiver With reflective element for laser

400 mm / 3 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/

Part no. Article Description number of beams

Operating range: 0.5 - 8 m

aid

alignment aid

aid

alignment aid

500 mm / 2 66500100 MLD-M002 Deflecting mirror

66047100 MLD312-RT2 Transceiver

Operating range: 0.5 - 6 m

400 mm / 3 66500200 MLD-M003 Deflecting mirror

66047200 MLD312-RT3 Transceiver

Leuze electronic MLD 300, MLD 500 97

Page 98

Order guide and accessories

Beam distance/

Part no. Article Description number of beams

Operating range: 0.5 - 8 m

400 mm / 3 66500201 MLD-XM03 Deflecting mirror

66047200 MLD312-RT3 Transceiver

Table 15.7: MLD 320 transmitter-receiver systems

Beam distance/

Part no. Article Description Option number of beams

Operating range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

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 sta tus 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 98

Page 99

Order guide and accessories

Beam distance/

Part no. Article Description Option number of beams

Operating range: 20 - 70 m

500 mm / 2 66001500 MLD300-XT2 Transmitter

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

400 mm / 3 66001600 MLD300-XT3 Transmitter

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 99

Page 100

Table 15.8: MLD 320 transceiver systems

Order guide and accessories

Beam distance/

Part no. Article Description Option number of beams

Operating range: 0.5 - 8 m

500 mm / 2 66500100 MLD-M002 Deflecting

mirror

66057100 MLD320-RT2 Transceiver

66058100 MLD320-RT2M Transceiver With integrated status indicator

Operating range: 0.5 - 6 m

400 mm / 3 66500200 MLD-M003 Deflecting

mirror

66057200 MLD320-RT3 Transceiver

66058200 MLD320-RT3M Transceiver With integrated status indicator

Operating range: 0.5 - 8 m

400 mm / 3 66500201 MLD-XM03 Deflecting

mirror

66057200 MLD320-RT3 Transceiver

66058200 MLD320-RT3M Transceiver With integrated status indicator

Table 15.9: MLD 330 transmitter-receiver systems

Beam distance/

Part no. Article Description Option number of beams

Operating range: 0.5 - 50 m

500 mm / 2 66001100 MLD300-T2 Transmitter

66063100 MLD330-R2 Receiver

66064100 MLD330-R2M Receiver With integrated status and

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

muting indicator

aid

alignment aid

alignment aid and integrated status and muting indicator

Leuze electronic MLD 300, MLD 500 100

Leuze MLD 300, MLD 500 Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 About this document

1.1 Used symbols and signal words

1.2 Checklists

2 Safety

2.1 Intended use and foreseeable misuse

2.1.1 Intended use

2.1.2 Using the laser alignment aid

2.1.3 Foreseeable misuse

2.2 Necessary competencies

2.3 Responsibility for safety

2.4 Exemption of liability

3 Device description

3.1 Device overview

3.2 Connection technology

3.2.1 AS-i parameter port

3.3 Display elements

3.3.1 Operating indicators on the transmitter

3.3.2 Operation indicators on the receiver

3.3.3 7-segment display at the receiver

3.3.4 Multicolor indicator

3.4 Integrated laser alignment aid

4 Functions

4.1 Start/restart interlock

4.2 Contactor monitoring

4.3 Signal output

4.4 Range switching

4.5 MultiScan mode

4.6 Periodic function test

4.7 Muting

4.7.1 Timing controlled 2-sensor muting

4.7.2 Sequence controlled 2-sensor muting

4.7.3 Timing controlled 4-sensor muting

4.7.4 Muting timeout

4.7.5 Muting restart

4.7.6 Alternative connection for second muting signal

4.7.7 Muting-enable

4.7.8 Partial muting

4.7.9 Muting operating modes

5 Applications

5.1 Access guarding

6 Mounting

6.1 Arrangement of transmitter and receiver

6.1.1 Arrangement of 1-beam safety sensors

6.1.2 Beam heights and ranges

6.1.3 Calculating the safety distance

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

6.1.5 Minimum distance to reflective surfaces

6.1.6 Preventing mutual interference between adjacent devices

6.2 Arrangement of the muting sensors

6.2.1 Basic information

6.2.2 Selecting optoelectronic muting sensors

6.2.3 Minimum distance for optoelectronic muting sensors

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

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

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

6.3 Mounting the safety sensor

6.3.1 Suitable mounting locations

6.3.2 Swivel mount BT-SET-240 (optional)

6.3.3 BT-P40 clamp bracket (optional)

7 Electrical connection

7.1 Pin assignment transmitter and receiver

7.1.1 Standard pin assignment

7.1.2 Pin assignment of local socket

7.1.3 AS-i pin assignment

7.1.4 AS-i signal assignment

7.2 Selecting contactor monitoring and start/restart interlock

7.3 Selecting the muting operating modes

7.3.1 Operating mode 1 (muting):

7.3.2 Operating mode 2 (muting timeout 100 h):

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

7.3.4 Operating mode 4 (sequence controlled 2-sensor muting with muting timeout 100 h):

7.3.5 Operating mode 5 (muting-enable):

7.3.6 Operating mode 6 (partial muting):

8 Starting up the device

8.1 Switching on

8.2 AS-i connection start-up