SICK MLP1 User manual
OPERATING INSTRUCTIONS
MLP1
Safety switch
Described product
MLP1
Manufacturer
SICK AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Legal information
This work is protected by copyright. Any rights derived from the copyright shall be
reserved for SICK AG. Reproduction of this document or parts of this document is only
permissible within the limits of the legal determination of Copyright Law. Any modifica‐
tion, abridgment or translation of this document is prohibited without the express writ‐
ten permission of SICK AG.
The trademarks stated in this document are the property of their respective owner.
© SICK AG. All rights reserved.
Original document
This document is an original document of SICK AG.
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Contents
1 About this document........................................................................ 5
1.1 Function of this document....................................................................... 5
1.2 Scope......................................................................................................... 5
1.3 Target groups and structure of these operating instructions................ 5
1.4 Additional information.............................................................................. 5
1.5 Symbols and document conventions...................................................... 5
2 Safety information............................................................................ 7
2.1 General safety notes................................................................................ 7
2.2 Intended use............................................................................................. 7
2.3 Requirements for the qualification of personnel.................................... 8
3 Product description........................................................................... 9
3.1 Structure and function............................................................................. 9
3.2 Product characteristics............................................................................ 9
4 Project planning................................................................................ 12
4.1 Manufacturer of the machine.................................................................. 12
4.2 Operating entity of the machine.............................................................. 12
4.3 Assembly................................................................................................... 13
4.4 Integration into the electrical control...................................................... 13
4.5 Thorough check concept.......................................................................... 19
5 Mounting............................................................................................. 20
5.1 Mounting several safety switches............................................................ 20
5.2 Mounting................................................................................................... 20
6 Electrical installation........................................................................ 23
6.1 Notes on cULus......................................................................................... 23
6.2 Device connection (M12, 5-pin).............................................................. 23
6.3 Device connection (2 x M12, 5-pin)........................................................ 23
6.4 Device connection (M12, 8-pin).............................................................. 24
6.5 Connecting a cascade.............................................................................. 24
7 Commissioning.................................................................................. 30
7.1 Safety......................................................................................................... 30
7.2 Switching on.............................................................................................. 30
7.3 Thorough check........................................................................................ 30
8 Troubleshooting................................................................................. 31
8.1 Safety......................................................................................................... 31
8.2 Troubleshooting........................................................................................ 31
9 Maintenance...................................................................................... 32
9.1 Cleaning..................................................................................................... 32
CONTENTS
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9.2 Regular thorough check........................................................................... 32
10 Decommissioning............................................................................. 33
10.1 Protection of the environment................................................................. 33
10.2 Disposal..................................................................................................... 33
11 Technical data.................................................................................... 34
11.1 Technical data........................................................................................... 34
11.2 Dimensional drawings.............................................................................. 37
12 Ordering information........................................................................ 39
12.1 Scope of delivery....................................................................................... 39
12.2 MLP1 ordering information...................................................................... 39
13 Spare parts......................................................................................... 40
13.1 Actuator..................................................................................................... 40
14 Accessories........................................................................................ 41
14.1 Connectivity............................................................................................... 41
15 Annex.................................................................................................. 44
15.1 Compliance with EU directives................................................................. 44
CONTENTS
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1 About this document
1.1 Function of this document
These operating instructions contain the information needed during the life cycle of the
safety switch.
They must be made available to all people who work with the safety switch.
1.2 Scope
These operating instructions apply only to the MLP1 safety switch.
This document is included with the following SICK part numbers (this document in all
available language versions):
8019902
1.3 Target groups and structure of these operating instructions
These operating instructions are intended for the following target groups: project devel‐
opers (planners, developers, designers), installers, electricians, safety experts (such as
CE authorized representatives, compliance officers, people who test and approve the
application), operators, and maintenance personnel.
The structure of these operating instructions is based on the life cycle phases of the
safety switch: project planning, mounting, electrical installation, commissioning, opera‐
tion, and maintenance.
1.4 Additional information
www.sick.com
The following information is available on the Internet:
•This document in other languages
•Data sheets and application examples
•CAD data of drawings and dimensional drawings
•Certificates (e.g. EU declaration of conformity)
•Guide for Safe Machinery Six steps to a safe machine
1.5 Symbols and document conventions
The following symbols and conventions are used in this document:
Safety notes and other notes
DANGER
Indicates a situation presenting imminent danger, which will lead to death or serious
injuries if not prevented.
WARNING
Indicates a situation presenting possible danger, which may lead to death or serious
injuries if not prevented.
CAUTION
Indicates a situation presenting possible danger, which may lead to moderate or minor
injuries if not prevented.
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NOTICE
Indicates a situation presenting possible danger, which may lead to property damage if
not prevented.
NOTE
Indicates useful tips and recommendations.
Instructions to action
bThe arrow denotes instructions to action.
1. The sequence of instructions for action is numbered.
2. Follow the order in which the numbered instructions are given.
✓The check mark denotes the result of an instruction.
LED symbols
These symbols indicate the status of an LED:
oThe LED is off.
ÖThe LED is flashing.
OThe LED is illuminated continuously.
Terminology
Dangerous state
A dangerous state is a status of the machine or facility, where people may be injured.
Protective devices prevent this risk if the machine is operated within its intended use.
The figures in this document always show the dangerous state of the machine as move‐
ment of a machine part. In practice, there are different dangerous states, such as:
•Machine movements
•Electrical parts
•Visible and invisible beam
•A combination of multiple hazards
1 ABOUT THIS DOCUMENT
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2 Safety information
2.1 General safety notes
This chapter contains general safety information about the safety switch.
Further information about specific product use situations can be found in the relevant
chapters.
DANGER
Hazard due to lack of effectiveness of the protective device
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
bPlease read this document carefully and make sure that you understand the con‐
tent fully before working with the device.
bFollow all safety notes in this document.
2.2 Intended use
The MLP1 safety switch is a transponder safety switch with a locking function, which is
controlled without contact by actuators and is suitable for the following applications:
•Monitoring of movable physical guards
•Locking device for process protection
The safety switch must only be used within the limits of the prescribed and specified
technical data and operating conditions at all times.
Incorrect use, improper modification of, or tampering with the safety switch will invali‐
date any warranty from SICK; in addition, any responsibility and liability of SICK for dam‐
age and secondary damage caused by this is excluded.
The safety switch is not suitable for the ambient conditions such as, but not limited, to
the following:
•Applications in which the dangerous state cannot be ended immediately (stop‐
ping/run-down time)
•Radioactivity (exception: natural radioactivity)
•Vacuum or high pressure
•High UV load
•In the vicinity of low-frequency RFID devices
•In the vicinity of magnetic fields
WARNING
Improper use of the safety switch
In the event of a voltage drop, the locking device unlocks regardless of whether the
dangerous state of the machine has ended
This safety switch has a simple electromagnetic locking device. There is no locking
device monitoring.
bDo not use the safety switch as a safety locking device according to EN 14119.
bDo not use the safety switch in applications in which the dangerous state cannot
be ended immediately (stopping/run-down time).
The following may impair the function of the safety switch:
•Passing metal chips
SAFETY INFORMATION 2
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2.3 Requirements for the qualification of personnel
The safety switch must be configured, mounted, connected, commissioned, and ser‐
viced by qualified safety personnel only.
Project planning
For project planning, a person is considered competent when he/she has expertise and
experience in the selection and use of protective devices on machines and is familiar
with the relevant technical rules and national work safety regulations.
Mechanical mounting, electrical installation, and commissioning
For the task, a person is considered qualified when he/she has the expertise and expe‐
rience in the relevant field and is sufficiently familiar with the application of the protec‐
tive device on the machine to be able to assess whether it is in an operationally safe
state.
Operation and maintenance
For operation and maintenance, a person is considered competent when he/she has
the expertise and experience in the relevant field and is sufficiently familiar with the
application of the protective device on the machine and has been instructed by the
machine operator in its operation.
2 SAFETY INFORMATION
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3 Product description
3.1 Structure and function
The safety switch is an interlocking device with a locking device consisting of a non-con‐
tact sensor with locking solenoid and a coded actuator. The actuator has a low coding
level.
If the protective device is closed, the actuator is led to the sensor. If the actuation field
is reached, the actuator code is read out and evaluated by RFID. If the code is valid, the
safe output signal switching device (OSSD) switches.
If the locking solenoid is supplied with power, the locking device is active.
3.2 Product characteristics
3.2.1 Device overview
12 3
4
5
6
7
Figure 1: Sensor
1Locking solenoid
2Sensor surface
3Cover plate
4Plug connector IN
5Plug connector OUT
6LOCK light emitting diode
7OSSD light emitting diode
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1 2 3
Figure 2: Actuator
1Anchor plate
2Protective cap
3Actuator surface
3.2.2 Product variants
The safety switch is delivered in different variants. You will find an overview of impor‐
tant distinguishing features of the variants in the following.
•2 cables with M12 plug connector (5-pin)
•1 cable with M12 plug connector (5-pin)
•1 cable with M12 plug connector (8-pin)
3.2.3 Locking principle
Important information
DANGER
Hazard due to lack of effectiveness of the protective device
In the event of a voltage drop, the locking device unlocks regardless of whether the
dangerous state of the machine has ended
bDo not use the safety switch in applications in which the dangerous state cannot
be ended immediately (stopping/run-down time).
Power to lock principle
•Lock locking device: voltage at locking device input
•Unlock locking function: no voltage at locking device input
If voltage is interrupted, the locking device is unlocked and the protective device can be
opened immediately.
Complementary information
•The locking device is not monitored, which means that the safety switch does not
check whether the anchor plate is applied to the solenoid.
•The locking force is not monitored.
•Locking force is not a safety-related function.
3.2.4 Protective functions
The safety switch has the following internal protective functions:
•Short-circuit protection at all outputs
•Cross-circuit monitoring at OSSDs
3 PRODUCT DESCRIPTION
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