Siemens SINAMICS S220 Technical Document

EQUIPMENT MANUAL
Booksize power units
Edition 01/2022
SINAMICS
www.siemens.com/drives
SINAMICS S220

SINAMICS
S220
Booksize power units
Equipment Manual
01/2022
6SL3097-6AC30-0BP0
Introduction 1
Fundamental safety
instructions 2
System overview 3
Line connection and line-
side power components 4
Smart Line Modules 5
Accessories 6
DC link components 7
Control cabinet design and
EMC booksize 8
Service and maintenance 9

Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage
to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices
referring only to property damage have no safety alert symbol. These notices shown below are graded according to
the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Quali󹪝ed Personnel
The product/system described in this documentation may be operated only by personnel quali󹪝ed for the speci󹪝c
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Quali󹪝ed personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance
are required to ensure that the products operate safely and without any problems. The permissible ambient
conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identi󹪝ed by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication may
be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this
publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: 6SL3097-6AC30-0BP0
Ⓟ 02/2022 Subject to change
Copyright © Siemens AG 2022.
All rights reserved

Table of contents
1 Introduction ........................................................................................................................................... 7
1.1 About SINAMICS .................................................................................................................. 7
1.2 About this documentation ................................................................................................... 8
1.3 SINAMICS S documentation overview................................................................................... 9
1.4 mySupport documentation ................................................................................................ 12
1.5 Additional information....................................................................................................... 13
1.6 General Data Protection Regulation .................................................................................... 14
2 Fundamental safety instructions......................................................................................................... 15
2.1 General safety instructions................................................................................................. 15
2.2 Equipment damage due to electric 󹪝elds or electrostatic discharge ..................................... 21
2.3 Warranty and liability for application examples ................................................................... 22
2.4 Security information .......................................................................................................... 23
2.5 Residual risks of power drive systems ................................................................................. 24
3 System overview.................................................................................................................................. 25
3.1 Platform Concept and Totally Integrated Automation .......................................................... 25
3.2 Intended use...................................................................................................................... 28
3.3 Directives, standards, certi󹪝cates........................................................................................ 29
3.4 S220 components and system data.................................................................................... 31
3.4.1 Mixed operation of SINAMICS S120 and S220 modules....................................................... 31
3.4.2 Overview of Smart Line Modules........................................................................................ 32
3.4.3 System data....................................................................................................................... 33
4 Line connection and line-side power components.............................................................................. 37
4.1 Information on the disconnector unit ................................................................................. 38
4.2 Overcurrent protection using fuses and circuit breakers ...................................................... 39
4.3 Connected to the line supply via residual current devices (RCD) .......................................... 40
4.3.1 Line supply connection via residual current devices ............................................................ 40
4.3.2 Residual current circuit breakers (RCCB).............................................................................. 41
4.4 Line contactors .................................................................................................................. 43
4.5 Line 󹪝lters.......................................................................................................................... 44
4.5.1 Overview of line 󹪝lters ....................................................................................................... 44
4.5.2 Safety instructions for line 󹪝lters......................................................................................... 44
4.5.3 Interface description .......................................................................................................... 47
4.5.4 Dimension drawing............................................................................................................ 48
4.5.5 Technical data.................................................................................................................... 48
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4.6 Line reactors...................................................................................................................... 49
4.6.1 Overview of line reactors ................................................................................................... 49
4.6.2 Safety instructions for line reactors..................................................................................... 49
4.6.3 Interface description .......................................................................................................... 50
4.6.4 Dimension drawings .......................................................................................................... 51
4.6.5 Technical data.................................................................................................................... 52
5 Smart Line Modules ............................................................................................................................. 53
5.1 Description ........................................................................................................................ 53
5.2 Overview........................................................................................................................... 54
5.3 Safety instructions for Smart Line Modules Booksize........................................................... 55
5.4 Frequency with which the DC link is precharged ................................................................. 57
5.5 Line failure bu󹪜er concept.................................................................................................. 58
5.6 Interface description .......................................................................................................... 59
5.6.1 Interface overview ............................................................................................................. 59
5.6.2 X1 line connection............................................................................................................. 59
5.6.3 Protective conductor connection ........................................................................................ 60
5.6.4 X21 EP terminal / temperature sensor................................................................................. 61
5.6.5 X24 24 V terminal adapter ................................................................................................. 62
5.6.6 Meaning of the LEDs.......................................................................................................... 62
5.7 Connection example .......................................................................................................... 64
5.8 Dimension drawing............................................................................................................ 65
5.9 Installation ........................................................................................................................ 66
5.10 Technical data.................................................................................................................... 68
5.11 Characteristics ................................................................................................................... 69
6 Accessories .......................................................................................................................................... 71
6.1 DC link adapter .................................................................................................................. 71
6.1.1 Description ........................................................................................................................ 71
6.1.2 Safety instructions for DC link adapters............................................................................... 72
6.1.3 Interface description .......................................................................................................... 74
6.1.4 Dimension drawings .......................................................................................................... 75
6.1.5 Mounting .......................................................................................................................... 77
6.1.5.1 Opening the protective 󹪞ap and removing the DC link screws ............................................ 78
6.1.5.2 43 A DC link adapter (6SL3162-2BD00-0AA0)..................................................................... 78
6.1.5.3 72 A DC link adapter (6SL3162-2BE00-0AA0) ..................................................................... 79
6.1.5.4 DC link adapter (6SL3162-2BM01-0AA0) ............................................................................ 81
6.1.6 Electrical connection.......................................................................................................... 82
6.1.6.1 Connectable conductor cross-sections for UL applications................................................... 82
6.1.6.2 43 A DC link adapter (6SL3162-2BD00-0AA0)..................................................................... 83
6.1.6.3 72 A DC link adapter (6SL3162-2BE00-0AA0) ..................................................................... 84
6.1.6.4 DC link adapter (6SL3162-2BM01-0AA0) ............................................................................ 86
6.1.7 Technical data.................................................................................................................... 89
6.2 Accessories for Smart Line Modules.................................................................................... 91
6.2.1 Connection plug ................................................................................................................ 91
6.2.1.1 Pin assignment .................................................................................................................. 91
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6.2.1.2 Preparing the power cables ................................................................................................ 92
6.2.1.3 Crimping conductor end sleeves......................................................................................... 93
6.2.1.4 Connecting the cable ......................................................................................................... 94
6.2.1.5 Installation ........................................................................................................................ 94
6.2.1.6 Secure with a cable tie ....................................................................................................... 95
6.2.2 Shield connection plate and terminal ................................................................................. 96
6.2.2.1 Option for the shielding ..................................................................................................... 96
6.2.2.2 Shield support with optional shield connection plate .......................................................... 97
6.3 DRIVE-CLiQ cabinet bushings and coupling ...................................................................... 100
7 DC link components........................................................................................................................... 101
7.1 Description ...................................................................................................................... 101
7.2 SITOP PSU400M ............................................................................................................... 102
7.2.1 Electrical connection........................................................................................................ 103
7.2.2 Supported operation conditions ....................................................................................... 106
8 Control cabinet design and EMC booksize ........................................................................................ 109
8.1 General information......................................................................................................... 109
8.2 Safety instructions when mounting and installing the control cabinet............................... 110
8.3 Electromagnetic compatibility .......................................................................................... 111
8.3.1 General information......................................................................................................... 111
8.3.2 Line supply connection conditions.................................................................................... 111
8.3.3 Classi󹪝cation of EMC ........................................................................................................ 111
8.3.4 Drive system applications................................................................................................. 112
8.3.5 Combination options of Line Modules with line reactors and line 󹪝lters ............................. 114
8.3.6 Interference/immunity ..................................................................................................... 114
8.4 Electromagnetic 󹪝elds at the workplace............................................................................ 116
8.4.1 Preliminary remarks ......................................................................................................... 116
8.4.2 Measurements/assessments for SINAMICS S220 booksize power units .............................. 116
8.5 Layout of the components ............................................................................................... 118
8.5.1 General information......................................................................................................... 118
8.5.2 DC link busbar current-carrying capacity........................................................................... 118
8.6 Single and multi-tier drive lineup...................................................................................... 119
8.7 Electrical connection........................................................................................................ 120
8.7.1 Connecting the DC link busbars and the 24 V busbars....................................................... 120
8.7.2 Mounting the 24 V terminal adapter................................................................................. 122
8.8 24 V DC supply voltage .................................................................................................... 125
8.8.1 General information......................................................................................................... 125
8.8.2 Options for the 24 V supply of the components ................................................................ 126
8.8.3 Overcurrent protection..................................................................................................... 127
8.8.4 Overvoltage protection .................................................................................................... 128
8.8.5 Typical 24 V current consumption .................................................................................... 130
8.8.6 Selecting power supply units............................................................................................ 130
8.9 Connection system .......................................................................................................... 132
8.9.1 Conditions for UL applications.......................................................................................... 132
8.9.2 DRIVE-CLiQ signal cables and MOTION-CONNECT power cables......................................... 132
8.9.3 Current-carrying capacity and derating factors for power cables and signal cables............. 132
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8.9.4 Connectable cable cross-sections ..................................................................................... 134
8.9.5 Maximum cable lengths................................................................................................... 135
8.10 Cable shielding and routing.............................................................................................. 136
8.11 Protective connection and equipotential bonding ............................................................. 138
8.12 Control cabinet cooling .................................................................................................... 139
8.12.1 General information on ventilation................................................................................... 139
8.12.2 Ventilation clearances...................................................................................................... 141
8.12.3 Notes on dimensioning climate control equipment........................................................... 142
8.13 Power losses of the components ...................................................................................... 143
9 Service and maintenance .................................................................................................................. 145
9.1 Spare parts ...................................................................................................................... 145
9.2 Replacing the fan............................................................................................................. 146
9.3 Forming the DC link capacitors......................................................................................... 149
9.4 Recycling and disposal ..................................................................................................... 152
Table of contents
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Introduction 1
1.1 About SINAMICS
Overview
With the SINAMICS converter series you can solve drive tasks in low, medium and DC voltage
range. All SIEMENS drive components, such as converters, motors and controls, are matched to
each other and can be integrated into your existing automation system. With SINAMICS, you
bene󹪝t from e󹪟cient engineering with a variety of tools for the entire product development and
production process.
For more information, visit the SINAMICS (https://new.siemens.com/global/en/products/drives/
sinamics.html) website.
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1.2 About this documentation
Structure
The SINAMICS documentation is structured according to the following categories:
• General documentation/catalogs
• User documentation
• Manufacturer/service documentation
Target group
This documentation is intended for machine manufacturers, commissioning engineers, and
service personnel who use the SINAMICS drive system.
Content
This manual presents the SINAMICS S220 components and provides the information,
procedures and/or operating actions required for the particular usage phase.
Standard scope
This documentation describes the functionality of the standard scope. This scope may di󹪜er
from the scope of the functionality of the system that is actually supplied. Please refer to the
ordering documentation only for the functionality of the supplied drive system.
Further functions may be executable in the system, which are not explained in this
documentation. However, there is no entitlement to these functions in the case of a new
delivery or service.
This documentation does not contain all detailed information on all types of the product.
Furthermore, this documentation cannot take into consideration every conceivable type of
installation, operation and service/maintenance.
The machine manufacturer is obliged to document the additions or changes made to the
product by the machine manufacturer.
Websites of third-party companies
This document may contain hyperlinks to third-party websites. Siemens is not responsible for
and shall not be liable for these websites and their content. Siemens has no control over the
information which appears on these websites and is not responsible for the content and
information provided there. The user bears the risk for their use.
Introduction
1.2 About this documentation
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1.3 SINAMICS S documentation overview
Software Manual
Alarms Described in order of ascending numbers SINAMICS S120/S150 List Manual
Parameters Described in order of ascending numbers SINAMICS S120/S150 List Manual
Function block di‐
agrams
Sorted according to topic SINAMICS S120/S150 List Manual
Described in order of ascending numbers
Drive functions SINAMICS S120 Function Manual Drive Functions
Communication topics SINAMICS S120 Function Manual Communication2)
Safety Integrated Basic and Extended Functions SINAMICS S120 Safety Integrated Function Manual
Basic Functions SINAMICS S120 Function Manual Drive Functions
Commissioning Of a simple SINAMICS S120 drive with START‐
ER
Getting Started1)
Commissioning With STARTER SINAMICS S120 Commissioning Manual1)
Commissioning Of a simple SINAMICS S120 drive with Start‐
drive
Getting Started with Startdrive2)
Commissioning With Startdrive SINAMICS S120 Commissioning Manual with Startdrive2)
Web server SINAMICS S120 Function Manual Drive Functions
Hardware Manual
Control Units
and expansion
components
• Control Units
• Option Boards
• Terminal Mod‐
ules
• DRIVE‑CLiQ HUB
Modules
• VSM10
• Encoder system
connection
SINAMICS S120 Equipment Manual for Control Units and
Supplementary System Components
S220 booksize
power units
• Line connection
• S220 Smart Line
Modules
• Control cabinet de‐
sign
SINAMICS S220 Equipment Manual Booksize Power Units
S120 booksize
power units
• Line connection
• Line Modules
• Motor Modules
• DC link compo‐
nents
• Braking resistors
• Motor-side power
components
• Control cabinet de‐
sign
SINAMICS S120 Equipment Manual Booksize Power Units
Chassis power units SINAMICS S120 Equipment Manual for chassis power units,
air, liquid or water cooled
AC drive components SINAMICS S120 Equipment Manual for AC Drives
S120 Combi components SINAMICS S120 Equipment Manual Combi
Diagnostics via
LEDs
STARTER SINAMICS S120 Commissioning Manual1)
Startdrive SINAMICS S120 Commissioning Manual with Startdrive2)
Meaning of the LEDs Equipment Manuals: Booksize Power Units and Control
Units and Expansion Components
High Frequency Drive components SINAMICS S120 System Manual High Frequency Drives
1) Up to 󹪝rmware version 5.1 SP1
2) From 󹪝rmware version 5.2
Introduction
1.3 SINAMICS S documentation overview
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Additional information
You can 󹪝nd information on the topics below at the following address (https://
support.industry.siemens.com/my/ww/en/documentation/advanced/):
•Ordering documentation/overview of documentation
• Additional links to download documents
• Using documentation online (󹪝nd and search in manuals/information)
Questions relating to the technical documentation
Please send any questions about the technical documentation (e.g. suggestions for
improvement, corrections) to the following email address
(mailto:docu.mo[email protected]).
FAQs
You can 󹪝nd Frequently Asked Questions about SINAMICS under Product Support (https://
support.industry.siemens.com/cs/de/en/ps/faq).
Siemens Support while on the move
With the "Siemens Industry Online Support" app, you can access more than 300,000 documents
for Siemens Industry products – any time and from anywhere. The app supports you in the
following areas, for example:
• Resolving problems when executing a project
• Troubleshooting when faults develop
• Expanding a system or planning a new system
Furthermore, you have access to the Technical Forum and other articles that our experts have
drawn up:
• FAQs
• Application examples
• Manuals
•Certi󹪝cates
• Product announcements and much more
The "Siemens Industry Online Support" app is available for Apple iOS and Android.
Introduction
1.3 SINAMICS S documentation overview
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Data matrix code on the rating plate
The data matrix code on the rating plate contains the speci󹪝c device data. This code can be read-
in with any smartphone and technical information for the appropriate device can be displayed
via the "Siemens Industry Online Support" mobile app.
Introduction
1.3 SINAMICS S documentation overview
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1.4 mySupport documentation
Overview
With the "mySupport documentation" web-based system you can compile your own individual
documentation based on Siemens content, and adapt it for your own machine documentation.
To start the application, click on the "My Documentation" tile on the mySupport homepage
(https://support.industry.siemens.com/cs/ww/en/my):
The con󹪝gured manual can be exported in RTF, PDF or XML format.
Note
Siemens content that supports the mySupport documentation application can be identi󹪝ed by
the presence of the "Con󹪝gure" link.
Introduction
1.4 mySupport documentation
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1.5 Additional information
Ensuring reliable operation
The manual describes a desired state which, if maintained, ensures the required level of
operational reliability and compliance with EMC limit values.
Should there be any deviation from the requirements in the Equipment Manual, appropriate
actions (e.g. measurements) must be taken to check/prove that the required level of operational
reliability and compliance with EMC limit values are ensured.
Spare parts
Spare parts are available on the internet at the following address (https://
www.sow.siemens.com).
Product maintenance
The components are subject to continuous further development within the scope of product
maintenance (improvements to robustness, discontinuations of components, etc.).
These further developments are "spare parts-compatible" and do not change the article number.
In the scope of such spare parts-compatible further developments, connector/connection
positions are sometimes changed slightly. This does not cause any problems with proper use of
the components. Please take this fact into consideration in special installation situations (e.g.
allow su󹪟cient clearance for the cable length).
Use of third-party products
This document contains recommendations relating to third-party products. Siemens accepts the
fundamental suitability of these third-party products. You can use equivalent products from
other manufacturers.
Siemens does not accept any warranty for the properties of third-party products.
Ground symbols
Icon Meaning
Connection for protective conductor
Ground (e.g. M 24 V)
,
Connection for functional equipotential bonding
Introduction
1.5 Additional information
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1.6 General Data Protection Regulation
Compliance with the General Data Protection Regulation
Siemens respects the principles of data protection, in particular the data minimization rules
(privacy by design).
For this product, this means:
The product does not process neither store any person-related data, only technical function data
(e.g. time stamps). If the user links these data with other data (e.g. shift plans) or if he stores
person-related data on the same data medium (e.g. hard disk), thus personalizing these data, he
has to ensure compliance with the applicable data protection stipulations.
Introduction
1.6 General Data Protection Regulation
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Fundamental safety instructions 2
2.1 General safety instructions
WARNING
Electric shock and danger to life due to other energy sources
Touching live components can result in death or severe injury.
• Only work on electrical devices when you are quali󹪝ed for this job.
• Always observe the country-speci󹪝c safety rules.
Generally, the following steps apply when establishing safety:
1. Prepare for disconnection. Notify all those who will be a󹪜ected by the procedure.
2. Isolate the drive system from the power supply and take measures to prevent it being
switched back on again.
3. Wait until the discharge time speci󹪝ed on the warning labels has elapsed.
4. Check that there is no voltage between any of the power connections, and between any of
the power connections and the protective conductor connection.
5. Check whether the existing auxiliary supply circuits are de-energized.
6. Ensure that the motors cannot move.
7. Identify all other dangerous energy sources, e.g. compressed air, hydraulic systems, or
water. Switch the energy sources to a safe state.
8. Check that the correct drive system is completely locked.
After you have completed the work, restore the operational readiness in the inverse sequence.
WARNING
Risk of electric shock and 󹪝re from supply networks with an excessively high impedance
Excessively low short-circuit currents can lead to the protective devices not tripping or tripping
too late, and thus causing electric shock or a 󹪝re.
• In the case of a conductor-conductor or conductor-ground short-circuit, ensure that the
short-circuit current at the point where the converter is connected to the line supply at least
meets the minimum requirements for the response of the protective device used.
• You must use an additional residual-current device (RCD) if a conductor-ground short circuit
does not reach the short-circuit current required for the protective device to respond. The
required short-circuit current can be too low, especially for TT supply systems.
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WARNING
Risk of electric shock and 󹪝re from supply networks with an excessively low impedance
Excessively high short-circuit currents can lead to the protective devices not being able to
interrupt these short-circuit currents and being destroyed, and thus causing electric shock or a
󹪝re.
• Ensure that the prospective short-circuit current at the line terminal of the converter does
not exceed the breaking capacity (SCCR or Icc) of the protective device used.
WARNING
Electric shock if there is no ground connection
For missing or incorrectly implemented protective conductor connection for devices with
protection class I, high voltages can be present at open, exposed parts, which when touched,
can result in death or severe injury.
• Ground the device in compliance with the applicable regulations.
WARNING
Electric shock due to connection to an unsuitable power supply
When equipment is connected to an unsuitable power supply, exposed components may carry
a hazardous voltage. Contact with hazardous voltage can result in severe injury or death.
• Only use power supplies that provide SELV (Safety Extra Low Voltage) or PELV- (Protective
Extra Low Voltage) output voltages for all connections and terminals of the electronics
modules.
WARNING
Electric shock due to equipment damage
Improper handling may cause damage to equipment. For damaged devices, hazardous
voltages can be present at the enclosure or at exposed components; if touched, this can result
in death or severe injury.
• Ensure compliance with the limit values speci󹪝ed in the technical data during transport,
storage and operation.
• Do not use any damaged devices.
Fundamental safety instructions
2.1 General safety instructions
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WARNING
Electric shock due to unconnected cable shield
Hazardous touch voltages can occur through capacitive cross-coupling due to unconnected
cable shields.
• As a minimum, connect cable shields and the conductors of power cables that are not used
(e.g. brake cores) at one end at the grounded housing potential.
WARNING
Arcing when a plug connection is opened during operation
Opening a plug connection when a system is operation can result in arcing that may cause
serious injury or death.
• Only open plug connections when the equipment is in a voltage-free state, unless it has
been explicitly stated that they can be opened in operation.
WARNING
Electric shock due to residual charges in power components
Because of the capacitors, a hazardous voltage is present for up to 5 minutes after the power
supply has been switched o󹪜. Contact with live parts can result in death or serious injury.
• Wait for 5 minutes before you check that the unit really is in a no-voltage condition and start
work.
NOTICE
Damage to equipment due to unsuitable tightening tools.
Unsuitable tightening tools or fastening methods can damage the screws of the equipment.
• Be sure to only use screwdrivers which exactly match the heads of the screws.
• Tighten the screws with the torque speci󹪝ed in the technical documentation.
• Use a torque wrench or a mechanical precision nut runner with a dynamic torque sensor and
speed limitation system.
NOTICE
Property damage due to loose power connections
Insu󹪟cient tightening torques or vibration can result in loose power connections. This can
result in damage due to 󹪝re, device defects or malfunctions.
• Tighten all power connections to the prescribed torque.
• Check all power connections at regular intervals, particularly after equipment has been
transported.
Fundamental safety instructions
2.1 General safety instructions
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WARNING
Spread of 󹪝re from built-in devices
In the event of 󹪝re outbreak, the enclosures of built-in devices cannot prevent the escape of
󹪝re and smoke. This can result in serious personal injury or property damage.
• Install built-in units in a suitable metal cabinet in such a way that personnel are protected
against 󹪝re and smoke, or take other appropriate measures to protect personnel.
• Ensure that smoke can only escape via controlled and monitored paths.
WARNING
Active implant malfunctions due to electromagnetic 󹪝elds
Converters generate electromagnetic 󹪝elds (EMF) in operation. Electromagnetic 󹪝elds may
interfere with active implants, e.g. pacemakers. People with active implants in the immediate
vicinity of an converter are at risk.
• As the operator of an EMF-emitting installation, assess the individual risks of persons with
active implants.
• Observe the data on EMF emission provided in the product documentation.
WARNING
Unexpected movement of machines caused by radio devices or mobile phones
Using radio devices or mobile telephones in the immediate vicinity of the components can
result in equipment malfunction. Malfunctions may impair the functional safety of machines
and can therefore put people in danger or lead to property damage.
• Therefore, if you move closer than 20 cm to the components, be sure to switch o󹪜 radio
devices or mobile telephones.
• Use the "SIEMENS Industry Online Support app" only on equipment that has already been
switched o󹪜.
NOTICE
Damage to motor insulation due to excessive voltages
When operated on systems with grounded line conductor or in the event of a ground fault in
the IT system, the motor insulation can be damaged by the higher voltage to ground. If you use
motors that have insulation that is not designed for operation with grounded line conductors,
you must perform the following measures:
• IT system: Use a ground fault monitor and eliminate the fault as quickly as possible.
• TN or TT systems with grounded line conductor: Use an isolating transformer on the line
side.
Fundamental safety instructions
2.1 General safety instructions
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