Siemens SINAMICS G120 User manual

Operating instructions
Low voltage inverters
Built-in units with CU250S-2 Control Units and
encoder evaluation
SINAMICS G120
04/2018Edition
SINAMICS
www.siemens.com/drives

SINAMICS
SINAMICS G120
Converter with the CU250S-2
Control Units
Operating Instructions
Edition 04/2018, Firmware V4.7 SP10
04/2018, FW V4.7 SP10
A5E31759476B AG
Changes in the current edition
Fundamental safety
instructions 1
Introduction 2
Description 3
Installing 4
Commissioning 5
Advanced commissioning 6
Saving the settings and
series commissioning 7
Alarms, faults and system
messages 8
Corrective maintenance 9
Technical data 10
Appendix A

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.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified
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 identified 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
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E31759476B AG
Ⓟ 04/2018 Subject to change
Copyright © Siemens AG 2013 - 2018.
All rights reserved

Changes in the current edition
Essential changes with respect to Edition 09/2017
New hardware
● PM240-2 Power Module, FSG
Power Module with IP20 degree of protection (Page 35)
Dimensioned drawings, drilling dimensions for the PM240-2 Power Module, IP20
(Page 62)
Specific technical data, 400 V inverters (Page 457)
Specific technical data, 690 V inverters (Page 467)
New functions
Firmware version 4.7 SP10 (Page 481)
Corrections
● Article number of the PM240-2 PT Power Module, 132 kW, corrected.
Technical data, PM240-2 Power Modules (Page 445)
● Dimensions of the PM240-2 Power Module corrected.
Dimensioned drawings, drilling dimensions for the PM240-2 Power Module, IP20
(Page 62)
● Setting the feedback signal for the line contactor control corrected.
Line contactor control (Page 355)
● SSI encoder and Endat 2.1 encoder are permissible for speed control.
Installing encoders (Page 121)
● PROFIdrive control word 2, bit 8 corrected
PROFIdrive status word 2, bit 7 corrected
Telegrams (Page 184)
Revised descriptions
● Only commissioning using the Startdrive PC-based tool is described. Commissioning with
STARTER has been removed.
Exceptions: Write and know-how protection.
You can find information on commissioning with STARTER on the Internet:
Operating Instructions, 09/2017 Edition (https://support.industry.siemens.com/cs/ww/
en/view/109751322)
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG 3

Changes in the current edition
Converter with the CU250S-2 Control Units
4Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG

Table of contents
Changes in the current edition......................................................................................................................3
1Fundamental safety instructions.................................................................................................................13
1.1 General safety instructions.....................................................................................................13
1.2 Equipment damage due to electric fields or electrostatic discharge......................................19
1.3 Warranty and liability for application examples......................................................................20
1.4 Industrial security...................................................................................................................21
1.5 Residual risks of power drive systems...................................................................................23
2 Introduction.................................................................................................................................................25
2.1 About the Manual...................................................................................................................25
2.2 Guide through the manual......................................................................................................26
3 Description..................................................................................................................................................29
3.1 Identifying the converter.........................................................................................................30
3.2 Directives and standards........................................................................................................31
3.3 Overview of Control Units......................................................................................................33
3.4 Power Modules......................................................................................................................34
3.4.1 Power Module with IP20 degree of protection.......................................................................35
3.4.2 Power Module with Push-Through technology.......................................................................37
3.5 Components for the Power Modules......................................................................................38
3.5.1 Accessories for shielding.......................................................................................................38
3.5.2 Line filter.................................................................................................................................39
3.5.3 Line reactor............................................................................................................................40
3.5.4 Output reactor........................................................................................................................42
3.5.5 du/dt filter plus VPL................................................................................................................45
3.5.6 Sine-wave filter.......................................................................................................................47
3.5.7 Braking resistor......................................................................................................................48
3.5.8 Brake Relay............................................................................................................................50
3.5.9 Safe Brake Relay...................................................................................................................50
3.6 Motors and multi-motor drives that can be operated..............................................................51
3.7 Encoder and Sensor Module..................................................................................................52
4 Installing.....................................................................................................................................................53
4.1 EMC-compliant installation of a machine or system..............................................................53
4.1.1 Control cabinet.......................................................................................................................54
4.1.2 Cables....................................................................................................................................55
4.1.3 Electromechanical components.............................................................................................58
4.2 Installing reactors, filters and braking resistors......................................................................59
4.3 Installing Power Modules.......................................................................................................60
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4.3.1 Basic installation rules for built-in units..................................................................................60
4.3.2 Dimensioned drawings, drilling dimensions for the PM240-2 Power Module, IP20...............62
4.3.3 Dimension drawings, drilling dimensions for PM240-2 Power Modules in push-through
technology..............................................................................................................................65
4.3.4 Dimensioned drawings, drilling dimensions for the PM250 Power Module............................69
4.4 Connecting the line supply and motor....................................................................................72
4.4.1 Permissible line supplies........................................................................................................72
4.4.1.1 TN line system.......................................................................................................................73
4.4.1.2 TT line system........................................................................................................................75
4.4.1.3 IT system................................................................................................................................76
4.4.2 Protective conductor..............................................................................................................77
4.4.3 Connecting an inverter with the PM240-2 Power Module......................................................79
4.4.4 Connecting the inverter with the PM250 Power Module........................................................84
4.4.5 Connecting the motor to the inverter in a star or delta connection.........................................86
4.4.6 Connecting a motor holding brake.........................................................................................87
4.4.6.1 Installing a Brake Relay - PM250 Power Module...................................................................89
4.4.6.2 Installing a Brake Relay - PM240-2 Power Module................................................................90
4.5 Connecting the interfaces for the inverter control..................................................................91
4.5.1 Overview of the interfaces on the front and upper side..........................................................92
4.5.2 Terminal strips behind the upper front door...........................................................................93
4.5.3 Terminal strips behind the lower front door............................................................................94
4.5.4 Fieldbus and encoder interfaces on the lower side................................................................95
4.5.5 Factory interface settings.......................................................................................................96
4.5.6 Default setting of the interfaces..............................................................................................98
4.5.7 Fail-safe digital input............................................................................................................109
4.5.8 Wire up the terminal strip and connect the shield................................................................110
4.5.9 Connecting the temperature contact of the braking resistor................................................113
4.5.10 Fieldbus interfaces...............................................................................................................113
4.5.11 Connecting the inverter to PROFINET.................................................................................114
4.5.11.1 Communication via PROFINET IO and Ethernet.................................................................114
4.5.11.2 Connecting the PROFINET cable to the inverter.................................................................115
4.5.11.3 What do you have to set for communication via PROFINET?.............................................116
4.5.11.4 Installing GSDML.................................................................................................................117
4.5.12 Connecting the inverter to PROFIBUS.................................................................................117
4.5.12.1 Connecting the PROFIBUS cable to the inverter.................................................................118
4.5.12.2 What do you have to set for communication via PROFIBUS?.............................................118
4.5.12.3 Installing the GSD................................................................................................................119
4.5.12.4 Setting the address..............................................................................................................119
4.6 Installing encoders...............................................................................................................121
5 Commissioning.........................................................................................................................................125
5.1 Commissioning guidelines...................................................................................................125
5.2 Tools to commission the inverter.........................................................................................126
5.3 Preparing for commissioning................................................................................................127
5.3.1 Collecting motor data...........................................................................................................127
5.3.2 Forming DC link capacitors..................................................................................................128
5.3.3 Inverter factory setting..........................................................................................................130
5.3.4 Inverter function modules.....................................................................................................132
5.4 Quick commissioning with a PC...........................................................................................134
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5.4.1 Creating a project.................................................................................................................134
5.4.2 Transfer inverters connected via USB into the project.........................................................135
5.4.3 Starting wizards for the quick commissioning......................................................................136
5.4.4 Standard Drive Control.........................................................................................................139
5.4.5 Dynamic Drive Control.........................................................................................................141
5.4.6 Expert...................................................................................................................................143
5.4.7 Configuring encoders...........................................................................................................147
5.4.8 Adapting the encoder data...................................................................................................148
5.4.9 Loading the settings into the inverter...................................................................................149
5.4.10 Identify motor data...............................................................................................................150
5.5 Restoring the factory setting................................................................................................152
5.5.1 Resetting the safety functions to the factory setting.............................................................153
5.5.2 Restore the factory settings (without safety functions).........................................................155
6 Advanced commissioning.........................................................................................................................157
6.1 Overview of the converter functions.....................................................................................157
6.2 Sequence control when switching the motor on and off.......................................................161
6.3 Adapt the default setting of the terminal strip.......................................................................164
6.3.1 Digital inputs.........................................................................................................................165
6.3.2 Digital outputs......................................................................................................................168
6.3.3 Analog inputs.......................................................................................................................170
6.3.4 Analog outputs.....................................................................................................................174
6.4 Controlling clockwise and counter-clockwise rotation via digital inputs...............................177
6.4.1 Two-wire control, method 1..................................................................................................178
6.4.2 Two-wire control, method 2..................................................................................................179
6.4.3 Two-wire control, method 3..................................................................................................180
6.4.4 Three-wire control, method 1...............................................................................................181
6.4.5 Three-wire control, method 2...............................................................................................182
6.5 Drive control via PROFIBUS or PROFINET.........................................................................183
6.5.1 Receive data and send data................................................................................................183
6.5.2 Telegrams............................................................................................................................184
6.5.3 Control and status word 1....................................................................................................187
6.5.4 Control and status word 2....................................................................................................190
6.5.5 Control and status word 3....................................................................................................191
6.5.6 NAMUR message word........................................................................................................193
6.5.7 Control and status word, encoder........................................................................................194
6.5.8 Position actual value of the encoder....................................................................................196
6.5.9 Parameter channel...............................................................................................................198
6.5.10 Examples for using the parameter channel..........................................................................201
6.5.11 Extending the telegram........................................................................................................203
6.5.12 Slave-to-slave communication.............................................................................................205
6.5.13 Acyclically reading and writing inverter parameters.............................................................205
6.6 Drive control via Modbus RTU.............................................................................................206
6.7 Drive control via USS...........................................................................................................209
6.8 Drive control via Ethernet/IP................................................................................................212
6.9 Drive control via CANopen...................................................................................................213
6.10 Jogging.................................................................................................................................214
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6.11 Limit position control............................................................................................................216
6.12 Switching over the drive control (command data set)..........................................................218
6.13 Motor holding brake.............................................................................................................220
6.14 Free function blocks.............................................................................................................224
6.14.1 Overview..............................................................................................................................224
6.14.2 Runtime groups and run sequence......................................................................................224
6.14.3 List of the free function blocks..............................................................................................225
6.14.4 Scaling.................................................................................................................................236
6.14.5 Activating free function block...............................................................................................237
6.14.6 Further information...............................................................................................................237
6.15 Selecting physical units........................................................................................................238
6.15.1 Motor standard.....................................................................................................................238
6.15.2 System of units.....................................................................................................................238
6.15.3 Technological unit of the technology controller....................................................................240
6.15.4 Setting the system of units and technology unit...................................................................240
6.16 Extended messages.............................................................................................................242
6.17 Safe Torque Off (STO) safety function.................................................................................244
6.17.1 Function description.............................................................................................................244
6.17.2 Commissioning STO............................................................................................................246
6.17.2.1 Safety functions password...................................................................................................246
6.17.2.2 Configuring a safety function................................................................................................248
6.17.2.3 Interconnecting the "STO active" signal...............................................................................249
6.17.2.4 Setting the filter for fail-safe digital inputs............................................................................250
6.17.2.5 Setting the forced checking procedure (test stop)................................................................252
6.17.2.6 Finalizing online commissioning...........................................................................................254
6.17.2.7 Checking the assignment of the digital inputs......................................................................255
6.17.2.8 Acceptance - completion of commissioning.........................................................................256
6.18 Setpoints..............................................................................................................................258
6.18.1 Overview..............................................................................................................................258
6.18.2 Analog input as setpoint source...........................................................................................260
6.18.3 Specifying the setpoint via the fieldbus................................................................................262
6.18.4 Motorized potentiometer as setpoint source........................................................................264
6.18.5 Fixed speed setpoint as setpoint source..............................................................................267
6.18.6 Pulse input as source of setpoint value................................................................................271
6.19 Setpoint calculation..............................................................................................................273
6.19.1 Overview..............................................................................................................................273
6.19.2 Invert setpoint.......................................................................................................................274
6.19.3 Inhibit direction of rotation....................................................................................................275
6.19.4 Skip frequency bands and minimum speed.........................................................................276
6.19.5 Speed limitation....................................................................................................................277
6.19.6 Ramp-function generator.....................................................................................................278
6.20 PID technology controller.....................................................................................................283
6.21 Motor control........................................................................................................................288
6.21.1 Reactor, filter and cable resistance at the inverter output....................................................288
6.21.2 V/f control.............................................................................................................................289
6.21.2.1 Characteristics of U/f control................................................................................................291
6.21.2.2 Optimizing motor starting.....................................................................................................294
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6.21.2.3 Optimizing the motor startup for application class Standard Drive Control..........................296
6.21.3 Vector control.......................................................................................................................298
6.21.3.1 Structure of the vector control..............................................................................................298
6.21.3.2 Default setting as a result of the application class Dynamic Drive Control..........................300
6.21.3.3 Checking the encoder signal................................................................................................300
6.21.3.4 Optimizing the speed controller............................................................................................300
6.21.3.5 Advanced settings................................................................................................................303
6.21.3.6 Friction characteristic...........................................................................................................306
6.21.3.7 Moment of inertia estimator..................................................................................................308
6.21.4 Torque control......................................................................................................................314
6.21.5 Application examples for closed-loop motor control.............................................................315
6.22 Electrically braking the motor...............................................................................................316
6.22.1 DC braking...........................................................................................................................318
6.22.2 Compound braking...............................................................................................................321
6.22.3 Dynamic braking..................................................................................................................323
6.22.4 Braking with regenerative feedback to the line....................................................................325
6.23 Overcurrent protection.........................................................................................................326
6.24 Inverter protection using temperature monitoring................................................................327
6.25 Motor protection with temperature sensor............................................................................330
6.26 Motor protection by calculating the temperature..................................................................333
6.27 Motor and inverter protection by limiting the voltage............................................................335
6.28 Monitoring the driven load....................................................................................................337
6.28.1 Breakdown protection..........................................................................................................338
6.28.2 No-load monitoring...............................................................................................................338
6.28.3 Blocking protection...............................................................................................................339
6.28.4 Torque monitoring................................................................................................................340
6.28.5 Rotation monitoring..............................................................................................................341
6.28.6 Speed deviation monitoring..................................................................................................342
6.29 Flying restart – switching on while the motor is running.......................................................344
6.30 Automatic restart..................................................................................................................346
6.31 Kinetic buffering (Vdc min control).......................................................................................350
6.32 Efficiency optimization..........................................................................................................352
6.33 Line contactor control...........................................................................................................355
6.34 Calculating the energy saving for fluid flow machines.........................................................357
6.35 Switchover between different settings..................................................................................359
7 Saving the settings and series commissioning.........................................................................................361
7.1 Saving settings on a memory card.......................................................................................362
7.1.1 Memory cards......................................................................................................................362
7.1.2 Saving setting on memory card............................................................................................365
7.1.3 Transferring the setting from the memory card....................................................................368
7.1.4 Safely remove the memory card..........................................................................................370
7.1.5 Activate message for a memory card that is not inserted....................................................372
7.2 Saving settings on a PC.......................................................................................................373
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7.3 Saving settings to an operator panel....................................................................................375
7.4 Other ways to back up settings............................................................................................377
7.5 Write protection....................................................................................................................378
7.6 Know-how protection............................................................................................................380
7.6.1 Extending the exception list for know-how protection..........................................................382
7.6.2 Activating and deactivating know-how protection................................................................383
8 Alarms, faults and system messages.......................................................................................................387
8.1 Operating states indicated on LEDs.....................................................................................388
8.2 System runtime....................................................................................................................392
8.3 Identification & maintenance data (I&M)..............................................................................393
8.4 Alarms, alarm buffer, and alarm history...............................................................................394
8.5 Faults, alarm buffer and alarm history..................................................................................397
8.6 List of alarms and faults.......................................................................................................401
9 Corrective maintenance............................................................................................................................411
9.1 Spare parts compatibility......................................................................................................411
9.2 Replacing inverter components............................................................................................412
9.2.1 Overview of replacing converter components......................................................................413
9.2.2 Replacing a Control Unit with enabled safety function.........................................................415
9.2.3 Replacing the Control Unit without the safety functions enabled.........................................418
9.2.4 Replacing the Control Unit without data backup..................................................................421
9.2.5 Replacing a Control Unit with active know-how protection..................................................421
9.2.6 Replacing a Power Module with enabled safety function.....................................................424
9.2.7 Replacing a Power Module without the safety function being enabled................................425
9.3 Replacing an encoder..........................................................................................................426
9.3.1 Replacing the encoder - same encoder type.......................................................................426
9.3.2 Replacing the encoder - different encoder type...................................................................427
9.4 Firmware upgrade and downgrade......................................................................................429
9.4.1 Upgrading the firmware........................................................................................................431
9.4.2 Firmware downgrade...........................................................................................................433
9.4.3 Correcting an unsuccessful firmware upgrade or downgrade..............................................435
9.5 Reduced acceptance after a component has been replaced and a firmware change.........436
9.6 If the converter no longer responds.....................................................................................437
10 Technical data..........................................................................................................................................439
10.1 Technical data, CU250S-2 Control Unit...............................................................................439
10.2 Overload capability of the inverter........................................................................................444
10.3 Technical data, PM240-2 Power Modules...........................................................................445
10.3.1 High overload - low overload PM240-2................................................................................445
10.3.2 Ambient conditions...............................................................................................................445
10.3.3 General technical data, 200 V inverters...............................................................................447
10.3.4 Specific technical data, 200 V inverters...............................................................................448
10.3.5 Current derating depending on the pulse frequency, 200 V inverters..................................455
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10.3.6 General technical data, 400 V inverters...............................................................................456
10.3.7 Specific technical data, 400 V inverters...............................................................................457
10.3.8 Current derating depending on the pulse frequency, 400 V inverters..................................465
10.3.9 General technical data, 690 V inverters...............................................................................466
10.3.10 Specific technical data, 690 V inverters...............................................................................467
10.3.11 Current derating depending on the pulse frequency, 690 V inverters..................................470
10.4 Technical data, PM250 Power Module................................................................................471
10.4.1 Ambient conditions...............................................................................................................472
10.4.2 General technical data, PM250............................................................................................473
10.4.3 Specific technical data, PM250............................................................................................474
10.4.4 Current reduction depending upon pulse frequency............................................................476
10.5 Data regarding the power loss in partial load operation.......................................................477
10.6 Restrictions for special ambient conditions..........................................................................478
A Appendix...................................................................................................................................................481
A.1 New and extended functions................................................................................................481
A.1.1 Firmware version 4.7 SP10..................................................................................................481
A.1.2 Firmware version 4.7 SP9....................................................................................................483
A.1.3 Firmware version 4.7 SP6....................................................................................................485
A.1.4 Firmware version 4.7 SP3....................................................................................................486
A.1.5 Firmware version 4.7............................................................................................................489
A.1.6 Firmware version 4.6 SP6....................................................................................................490
A.1.7 Firmware version 4.6............................................................................................................491
A.2 Activating licensed functions................................................................................................492
A.2.1 Licensing..............................................................................................................................492
A.2.2 Creating or displaying the license key..................................................................................493
A.2.3 Writing the license key to the card.......................................................................................496
A.3 Handling the BOP 2 operator panel.....................................................................................498
A.3.1 Changing settings using BOP-2...........................................................................................499
A.3.2 Changing indexed parameters.............................................................................................500
A.3.3 Directly entering the parameter number and value..............................................................501
A.3.4 A parameter cannot be changed..........................................................................................502
A.4 Interconnecting signals in the inverter..................................................................................503
A.4.1 Fundamentals......................................................................................................................503
A.4.2 Application example.............................................................................................................505
A.5 Application Examples...........................................................................................................507
A.5.1 Setting an absolute encoder................................................................................................507
A.5.2 Connecting a fail-safe digital input.......................................................................................511
A.6 Acceptance tests for the safety functions.............................................................................513
A.6.1 Recommended acceptance test...........................................................................................513
A.6.2 Acceptance test STO (basic functions)................................................................................514
A.6.3 Machine documentation.......................................................................................................516
A.6.4 Documenting the settings for the basic functions, firmware V4.4 ... V4.7 SP6....................518
A.7 Manuals and technical support............................................................................................519
A.7.1 Overview of the manuals......................................................................................................519
A.7.2 Configuring support..............................................................................................................521
A.7.3 Product Support...................................................................................................................522
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Index.........................................................................................................................................................523
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Fundamental safety instructions 1
1.1 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 qualified for this job.
● Always observe the country-specific safety rules.
Generally, the following six steps apply when establishing safety:
1. Prepare for disconnection. Notify all those who will be affected 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 specified 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 fire 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 fire.
● In the case of a conductor-conductor or conductor-ground short-circuit, ensure that the
short-circuit current at the point where the inverter 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 fire 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 fire.
● Ensure that the prospective short-circuit current at the line terminal of the inverter 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 that might result in serious 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 specified in the technical data during transport,
storage and operation.
● Do not use any damaged devices.
Fundamental safety instructions
1.1 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 off. 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
Property damage due to loose power connections
Insufficient tightening torques or vibration can result in loose power connections. This can
result in damage due to fire, 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.
WARNING
Spread of fire from built-in devices
In the event of fire outbreak, the enclosures of built-in devices cannot prevent the escape of
fire 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 fire and smoke, or take other appropriate measures to protect personnel.
● Ensure that smoke can only escape via controlled and monitored paths.
Fundamental safety instructions
1.1 General safety instructions
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG 15

WARNING
Active implant malfunctions due to electromagnetic fields
Inverters generate electromagnetic fields (EMF) in operation. People with active implants in
the immediate vicinity of this equipment are at particular risk.
● As the operator of an EMF-emitting installation, assess the individual risks of persons with
active implants. The following clearances are usually adequate:
– No clearance to closed control cabinets and shielded MOTION-CONNECT supply
cables
– Forearm length (approx. 35 cm clearance) to distributed drive systems and open
control cabinets
WARNING
Unexpected movement of machines caused by radio devices or mobile phones
When radio devices or mobile phones with a transmission power > 1 W are used in the
immediate vicinity of components, they may cause the equipment to malfunction.
Malfunctions may impair the functional safety of machines and can therefore put people in
danger or lead to property damage.
● If you come closer than around 2 m to such components, switch off any radios or mobile
phones.
● Use the "SIEMENS Industry Online Support app" only on equipment that has already been
switched off.
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.
WARNING
Fire due to inadequate ventilation clearances
Inadequate ventilation clearances can cause overheating of components with subsequent
fire and smoke. This can cause severe injury or even death. This can also result in increased
downtime and reduced service lives for devices/systems.
● Ensure compliance with the specified minimum clearance as ventilation clearance for the
respective component.
Fundamental safety instructions
1.1 General safety instructions
Converter with the CU250S-2 Control Units
16 Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG

WARNING
Unrecognized dangers due to missing or illegible warning labels
Dangers might not be recognized if warning labels are missing or illegible. Unrecognized
dangers may cause accidents resulting in serious injury or death.
● Check that the warning labels are complete based on the documentation.
● Attach any missing warning labels to the components, where necessary in the national
language.
● Replace illegible warning labels.
NOTICE
Device damage caused by incorrect voltage/insulation tests
Incorrect voltage/insulation tests can damage the device.
● Before carrying out a voltage/insulation check of the system/machine, disconnect the
devices as all converters and motors have been subject to a high voltage test by the
manufacturer, and therefore it is not necessary to perform an additional test within the
system/machine.
WARNING
Unexpected movement of machines caused by inactive safety functions
Inactive or non-adapted safety functions can trigger unexpected machine movements that
may result in serious injury or death.
● Observe the information in the appropriate product documentation before commissioning.
● Carry out a safety inspection for functions relevant to safety on the entire system, including
all safety-related components.
● Ensure that the safety functions used in your drives and automation tasks are adjusted
and activated through appropriate parameterizing.
● Perform a function test.
● Only put your plant into live operation once you have guaranteed that the functions relevant
to safety are running correctly.
Note
Important safety notices for Safety Integrated functions
If you want to use Safety Integrated functions, you must observe the safety notices in the Safety
Integrated manuals.
Fundamental safety instructions
1.1 General safety instructions
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG 17

WARNING
Malfunctions of the machine as a result of incorrect or changed parameter settings
As a result of incorrect or changed parameterization, machines can malfunction, which in turn
can lead to injuries or death.
● Protect the parameterization (parameter assignments) against unauthorized access.
● Handle possible malfunctions by taking suitable measures, e.g. emergency stop or
emergency off.
Fundamental safety instructions
1.1 General safety instructions
Converter with the CU250S-2 Control Units
18 Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG