SICK MLP1 Operating Instructions Manual
MLP1
Safety switch
O P E R A T I N G I N S T R U C T I O N S
Described product
MLP1
Manufacturer
SIC
K AG
Erwin-Sick-Str. 1
79183 Waldkirch
Germany
Legal information
his work is protected by copyright. Any rights derived from the copyright shall be
T
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
T
his document is an original document of SICK AG.
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Contents
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
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CONTENTS
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
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ABOUT THIS DOCUMENT 1
1 About this document
1.1 Function of this document
These operating instructions contain the information needed during the life cycle of the
afety switch.
s
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.
T
his 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‐
oper
s (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
T
he 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
ates a situation presenting imminent danger, which will lead to death or serious
Indic
injuries if not prevented.
WARNING
Indic
ates a situation presenting possible danger, which may lead to death or serious
injuries if not prevented.
CAUTION
ates a situation presenting possible danger, which may lead to moderate or minor
Indic
injuries if not prevented.
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BOUT THIS DOCUMENT
1 A
NOTICE
ates a situation presenting possible danger, which may lead to property damage if
Indic
not prevented.
NOTE
Indic
ates useful tips and recommendations.
Instructions to action
he arrow denotes instructions to action.
T
b
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:
The LED is off.
o
The LED is flashing.
Ö
The LED is illuminated continuously.
O
Terminology
D
angerous 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
•
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2 Safety information
2.1 General safety notes
This chapter contains general safety information about the safety switch.
urther information about specific product use situations can be found in the relevant
F
chapters.
DANGER
H
azard 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.
Please read this document carefully and make sure that you understand the con‐
b
tent fully before working with the device.
Follow all safety notes in this document.
b
2.2 Intended use
The MLP1 safety switch is a transponder safety switch with a locking function, which is
ontrolled without contact by actuators and is suitable for the following applications:
c
SAFETY INFORMATION 2
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
Im
proper 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.
Do not use the safety switch as a safety locking device according to EN 14119.
b
Do not use the safety switch in applications in which the dangerous state cannot
b
be ended immediately (stopping/run-down time).
The following may impair the function of the safety switch:
assing metal chips
P
•
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AFETY INFORMATION
2 S
2.3 Requirements for the qualification of personnel
The safety switch must be configured, mounted, connected, commissioned, and ser‐
iced by qualified safety personnel only.
v
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.
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3 Product description
1
2 3
4
5
6
7
3.1 Structure and function
The safety switch is an interlocking device with a locking device consisting of a non-con‐
act sensor with locking solenoid and a coded actuator. The actuator has a low coding
t
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
PRODUCT DESCRIPTION 3
Figure 1: Sensor
Locking solenoid
1
Sensor surface
2
Cover plate
3
Plug connector IN
4
Plug connector OUT
5
LOCK light emitting diode
6
OSSD light emitting diode
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1 2 3
3 P
RODUCT DESCRIPTION
Figure 2: Actuator
1
2
3
3.2.2 Product variants
The safety switch is delivered in different variants. You will find an overview of impor‐
t
ant distinguishing features of the variants in the following.
Anchor plate
Protective cap
Actuator surface
•
•
•
3.2.3 Locking principle
Important information
DANGER
azard due to lack of effectiveness of the protective device
H
In the event of a voltage drop, the locking device unlocks regardless of whether the
dangerous state of the machine has ended
b
Power to lock principle
•
•
If voltage is interrupted, the locking device is unlocked and the protective device can be
opened immediately.
Complementary information
•
•
•
2 cables with M12 plug connector (5-pin)
1 cable with M12 plug connector (5-pin)
1 cable with M12 plug connector (8-pin)
Do not use the safety switch in applications in which the dangerous state cannot
be ended immediately (stopping/run-down time).
ock locking device: voltage at locking device input
L
Unlock locking function: no voltage at locking device input
T
he 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:
•
•
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hort-circuit protection at all outputs
S
Cross-circuit monitoring at OSSDs
Subject to change without notice
•
2 1
•
3.2.5 Status indicators
The safety switch outputs important status information using a number of LEDs.
verload protection on OSSDs
O
Supply voltage reverse polarity protection
PRODUCT DESCRIPTION 3
Figure 3: Status LEDs
able 1: Status LEDs
T
No. Name Color Meaning
1
2
1)
When a too high load is applied to the application diagnostic output, the red OSSD LED remains continu‐
ousl
y lit. This will not have any effect on the actual switching behavior of the safety switch.
LOCK Yellow Lights up when the
gnet is supplied
ma
with voltage.
OSSD Red/green Lights up green when
he OSSD pair is in the
t
ON state.
Lights up red when
the OSSD pair is in the
OFF state.
1)
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4 PROJECT PLANNING
4 Project planning
4.1 Manufacturer of the machine
DANGER
F
ailure to comply with manufacturer’s obligations
Hazard due to lack of effectiveness of the protective device
Carry out a risk assessment before using the safety switch.
b
Do not tamper with, open, or modify the components of the safety switch.
b
Do not repair defective devices – they must be replaced instead.
b
Make sure that switch-on commands which bring about a dangerous state of the
b
machine are not enabled until the protective device is closed.
Make sure that a stop command is triggered when the protective device is opened
b
during the dangerous machine state.
The safety switches must not be defeated (contacts jumpered), rotated away,
b
removed, or rendered ineffective in any other way. If necessary, put measures in
place to reduce possibilities for defeat.
If several devices are connected in series (cascade) and the simplified process accord‐
g to EN ISO 13849 is used to determine the performance level (PL), the PL may be
in
reduced.
As the number of safety switches in a cascade increases, so too does the response
time.
4.2 Operating entity of the machine
DANGER
ailure to comply with operating entity’s obligations
F
Hazard due to lack of effectiveness of the protective device
Modifications to the machine and modifications to the mechanical mounting of
b
the safety switch necessitate a new risk assessment. The results of this risk
assessment may require the operating entity of the machine to fulfill the manufac‐
turer’s obligations.
Apart from during the procedures described in this document, the components of
b
the safety switch must not be opened or modified.
Do not perform repair work on the components. Improper repair of the safety
b
switch can lead to a loss of the protective function.
Ensure that there is no bypassing by replacement actuators. Restrict access to
b
actuators.
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4.3 Assembly
PROJECT PLANNING 4
Important information
DANGER
ypassing the protective device
B
Hazard due to lack of effectiveness of the protective device
Avoid incentives to manipulate the safety switch by taking at least one of the fol‐
b
lowing measures:
Cover the sensor and the actuator with additional equipment or protect them
°
against access.
If possible use permanent mounting methods for actuators (e.g., glue, safety
°
screws, or rivets).
Mounting location
S
elect the mounting location so that the sensor and actuator are accessible for
b
maintenance work and are protected against damage.
Select a mounting location that ensures the sensor is as far away from the door
b
hinge as possible.
If necessary, fit an additional stop for the moving protective device.
b
Distance
When several safety switches are mounted to the machine, they must be mounted at a
minimum distance to one another see "Mounting several safety switches", page 20.
Alignment
The safety switch can be mounted in any alignment. When mounted horizontally, manip‐
ulation protection is increased by the anchor plate with rotating bearings. When
mounted horizontally, if the actuator is triggered by the movable physical guard, the
actuator is held by the magnet. As the anchor plate has rotating bearings, the gravita‐
tional force rotates the actuator surface away from the sensor surface and the OSSDs
go into the OFF state.
2 possible mounting methods
The sensor can be mounted in 2 ways:
Surface mounting. The sensor is mounted on the fixed part of the protective
•
device (e.g., door frame).
Flush mounting. The sensor is mounted in the fixed part of the protective device
•
(e.g., door frame). There must be a suitable recess in the mounting surface. The
thickness of the mounting surface must be between 1.5 mm and 3 mm.
Complementary information
Dimensional dr
awing of the recess for flush mounting see figure 17.
4.4 Integration into the electrical control
Switch-on commands that put the machine in a dangerous state may only be activated
when t
he protective device is closed. When the machine goes into a dangerous state, a
stop command must be triggered if the protective device is opened. Depending on the
safety concept, the signal is analyzed by safety relays or a safety controller, for example.
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ROJECT PLANNING
4 P
4.4.1 OSSDs
The control that is connected and all devices responsible for safety must comply with
t
he required performance level and the required category (for example, according to
ISO 13849-1).
Safety switches with local inputs and outputs can be directly integrated into the
mac
hine controller.
DANGER
H
azard 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.
Make sure that the following control and electrical requirements are met so the
b
protective function can be fulfilled.
T
he output signals from an OSSD pair must not be connected to each other.
•
In the machine controller, both signals from an OSSD pair must be processed sep‐
•
arately.
Figure 4: Dual-channel and isolated connection of OSSD 1 and OSSD 2
he machine must switch to the safe state at any time if at least one OSSD in an
T
•
OSSD pair switches to the OFF state.
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PROJECT PLANNING 4
event the formation of a potential difference between the load and the protec‐
Pr
•
tive device. If you connect loads to the OSSDs (safety outputs) that then also
switch if controlled with negative voltage (e.g., electro-mechanical contactor with‐
out reverse polarity protection diode), you must connect the 0 V connections of
these loads and those of the corresponding protective device individually and
directly to the same 0 V terminal strip. In the event of a fault, this is the only way to
ensure that there can be no potential difference between the 0 V connections of
the loads and those of the corresponding protective device.
Figure 5: No potential difference between load and protective device
DANGER
azard due to lack of effectiveness of the protective device
H
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.
Downstream contactors must be positively guided and monitored depending on applic‐
able national regulations or required reliability of the safety function.
Make sure that downstream contactors are monitored (external device monitoring,
b
EDM).
Requirements for the electrical control of the machine
Use t
•
•
he control without test pulses. The safety switch is self-testing.
The safety switch tests the OSSDs at regular intervals. To do this, it switches each
OSSD briefly (for max. 1 ms) to the OFF state and checks whether this channel is
voltage-free during this time.
Make sure that the machine’s control does not react to these test pulses and the
machine does not switch off.
T
he inputs of a connected evaluation unit must be positive-switching (PNP), as the
•
two outputs of the safety switch send a level of the supply voltage in the switchedon state.
The OSSDs are short-circuit protected to 24 V DC and 0 V. When the actuator is in the
sensor’s response range, the OSSDs signal the ON state with the HIGH signal level (nonisolated). If the actuator is removed from the sensor’s response range or there is a
device fault, the OSSDs signal the OFF state with the LOW signal level.
The safety switch complies with the regulations for electromagnetic compatibility (EMC)
for the industrial sector (Radio Safety Class A). Radio interference cannot be ruled out
when used in residential areas.
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