Siemens 340, 345, 350, 346XP, 351 User Manual
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Manual
Industrial Controls
Load Feeders and Motor Starters
SIRIUS 3RM1 Motor Starter
11/2013Edition
Answers for industry.
SIRIUS 3RM1 motor starter
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Industrial Controls
Load feeders and motor starters
SIRIUS 3RM1 motor starter
Manual
11/2013
A5E0345285095020A/RS-AB/002
Introduction
1
Product-specific safety
information
2
Description
3
Configuration
4
Mounting
5
Connection
6
Operator control and
monitoring
7
Service and maintenance
8
Technical data
9
Dimension drawings
10
Circuit diagrams
11
Typical circuits
A
Directives
B
Correction sheet
C
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
3ZX1012-0RM10-2AC1
Ⓟ 11/2013 Technical data subject to change
Copyright © Siemens AG 2012.
All rights reserved
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.
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Table of contents
1 Introduction................................................................................................................................... 9
1.1 Responsibility of the user for system configuration and functionality .......................................... 9
1.2 Required basic knowledge........................................................................................................ 9
1.3 Scope .................................................................................................................................... 10
1.4 Definition ................................................................................................................................ 10
1.5 Conformity.............................................................................................................................. 10
1.6 Further documentation ........................................................................................................... 11
1.7 Service&Support .................................................................................................................... 11
1.8 DataMatrix code ..................................................................................................................... 14
1.9 Correction sheet ..................................................................................................................... 15
2 Product-specific safety information ................................................................................................ 17
2.1 General safety notes .............................................................................................................. 17
2.2 Safety information for hazardous areas .................................................................................. 17
2.3 Safety instructions for safety-related applications .................................................................... 18
2.4 Intended use .......................................................................................................................... 19
2.5 Current information about operational safety........................................................................... 20
2.6 Declaration of conformity ........................................................................................................ 20
3 Description ................................................................................................................................. 21
3.1 Overview ................................................................................................................................ 21
3.2 Applications............................................................................................................................ 22
3.3 Hybrid technology................................................................................................................... 23
3.4 Device versions ...................................................................................................................... 24
3.5 Functions ............................................................................................................................... 27
3.5.1 Switching the 3RM1 motor starter under normal operating conditions ..................................... 27
3.5.1.1 Direct-on-line starter ............................................................................................................... 27
3.5.1.2 Reversing starter .................................................................................................................... 28
3.5.2 Overload protection ................................................................................................................ 29
3.5.2.1 Protective functions ................................................................................................................ 29
3.5.2.2 Thermal calculation method (motor memory module) .............................................................. 30
3.5.2.3 ATEX-certified motor overload protection in the case of 3RM11/3RM13 Failsafe..................... 32
3.5.3 Shutdown on malfunction ....................................................................................................... 35
3.5.4 Safety-related shutdown with 3RM11/3RM13 Failsafe motor starters ...................................... 36
3.5.5 Carrying out the function test .................................................................................................. 39
3.6 Accessories and order number scheme .................................................................................. 41
3.6.1 Overview of all device components ......................................................................................... 41
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3.6.2 Accessories ............................................................................................................................42
3.6.2.1 Infeed system ..........................................................................................................................42
3.6.2.2 Sealable cover ........................................................................................................................44
3.6.2.3 Wall fixture ..............................................................................................................................44
3.6.2.4 Device connectors ...................................................................................................................45
3.6.2.5 Terminals ................................................................................................................................48
3.6.2.6 Device identification label ........................................................................................................48
3.6.3 Order number scheme for SIRIUS 3RM1 motor starter ............................................................49
4 Configuration .............................................................................................................................. 51
4.1 Rated operational current and derating ....................................................................................51
4.2 Ambient conditions ..................................................................................................................56
4.2.1 Application environment ..........................................................................................................56
4.2.2 Ambient temperature ...............................................................................................................56
4.2.3 Mounting position ....................................................................................................................56
4.2.4 Grounding measures ...............................................................................................................56
4.2.5 Permissible operating voltage ..................................................................................................57
4.2.6 Minimum load current ..............................................................................................................57
4.3 Load feeders - protection against short circuit ..........................................................................58
4.3.1 Protection against short circuit .................................................................................................58
4.3.2 Configuration of load feeders ...................................................................................................58
4.3.3 Configuration of a load feeder with 3RM1 motor starter in compliance with IEC .......................58
4.3.3.1 Fuseless design ......................................................................................................................59
4.3.3.2 Fused design ..........................................................................................................................61
4.3.4 Configuration of a load feeder with 3RM1 motor starter in compliance with UL .........................62
4.3.4.1 Function according to UL 508 ..................................................................................................62
4.3.4.2 SCCR short circuit current ratings............................................................................................62
4.3.4.3 Fuses and circuit breakers ......................................................................................................63
4.4 Infeed for the main circuit ........................................................................................................64
4.4.1 Infeed options .........................................................................................................................64
4.4.2 3RM19 3-phase infeed system ................................................................................................65
4.5 Configuration with device connectors ......................................................................................67
4.5.1 Configuration with device connectors ......................................................................................67
4.6 Examples/applications .............................................................................................................67
4.6.1 Operation with the EMERGENCY-STOP function ....................................................................67
5 Mounting .................................................................................................................................... 71
5.1 Warning notices ......................................................................................................................71
5.2 Mounting the devices on a level surface ..................................................................................72
5.3 Disassembling the devices from a level surface .......................................................................73
5.4 Mounting the devices on a standard mounting rail ...................................................................74
5.5 Disassembling devices from a standard mounting rail ..............................................................75
5.6 Mounting the devices with device connectors on a standard mounting rail ...............................76
5.7 Disassembling the devices with device connectors from a standard mounting rail ....................78
5.8 Mounting the devices with device connectors on a wall ............................................................81
5.9 Disassembling the devices with device connectors from a wall ................................................83
Table of contents
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5.10 Mounting the sealable cover ................................................................................................... 85
6 Connection ................................................................................................................................. 87
6.1 Connecting the screw-type terminals ...................................................................................... 87
6.2 Disconnecting the screw-type terminals .................................................................................. 89
6.3 Connecting the push-in terminals............................................................................................ 90
6.3.1 Wiring rules for spring-loaded terminals (with push-in technology) .......................................... 90
6.3.2 Connecting the push-in terminals............................................................................................ 91
6.4 Disconnecting the push-in terminals ....................................................................................... 93
6.5 Attaching the terminals ........................................................................................................... 94
6.6 Removing the terminals .......................................................................................................... 95
6.7 Connecting the infeed system (option) .................................................................................... 96
7 Operator control and monitoring .................................................................................................... 99
7.1 Operator controls ................................................................................................................... 99
7.1.1 Parameterizing the 3RM1 motor starter ................................................................................ 100
7.1.2 Setting the rated operational current ..................................................................................... 100
7.1.3 Setting the RESET method ................................................................................................... 100
7.2 Displays and location of the connections .............................................................................. 103
7.2.1 Alarms, faults and system events ......................................................................................... 106
7.2.1.1 LEDs .................................................................................................................................... 106
7.2.1.2 Status indicators of the 3RM1 motor starter .......................................................................... 106
7.2.1.3 Signaling faults on external I/O ............................................................................................. 108
7.2.1.4 Fault rectification .................................................................................................................. 108
8 Service and maintenance ........................................................................................................... 111
8.1 Maintenance and service ...................................................................................................... 111
8.2 Device replacement .............................................................................................................. 112
9 Technical data .......................................................................................................................... 113
9.1 Motor starters ....................................................................................................................... 113
9.1.1 General technical specifications ........................................................................................... 113
9.1.2 Electromagnetic compatibility (EMC) .................................................................................... 115
9.1.3 Control circuit ....................................................................................................................... 117
9.1.4 Main circuit ........................................................................................................................... 120
9.1.5 Safety data ........................................................................................................................... 121
9.1.5.1 General safety data .............................................................................................................. 121
9.1.5.2 ATEX-specific safety data..................................................................................................... 122
9.1.6 Connection cross sections .................................................................................................... 123
9.1.7 Number of starting operations............................................................................................... 124
9.1.8 Overload protection/device protection characteristic ............................................................. 125
9.2 Infeed system for 3RM1 motor starter ................................................................................... 128
9.2.1 General technical data.......................................................................................................... 128
10 Dimension drawings .................................................................................................................. 129
10.1 3RM1 dimension drawings ................................................................................................... 129
10.2 Dimension drawings for 3RM1 device connectors ................................................................. 132
Table of contents
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11 Circuit diagrams ......................................................................................................................... 137
11.1 3RM10 circuit diagrams (direct-on-line starter, Standard).......................................................137
11.2 3RM11 circuit diagrams (direct-on-line starter, Failsafe).........................................................139
11.3 3RM12 circuit diagrams (reversing starter, Standard) ............................................................140
11.4 3RM13 circuit diagrams (reversing starter, Failsafe) ..............................................................142
A Typical circuits ........................................................................................................................... 143
A.1 Typical circuits for 3RM1 Standard ........................................................................................143
A.1.1 Direct-on-line starter 24 V DC with switch operation ..............................................................143
A.1.2 Direct-on-line starter 24 V DC with switch operation and 230 V brake ....................................144
A.1.3 Direct-on-line starter 24 V DC with switch operation and 400 V brake ....................................145
A.1.4 Direct-on-line starter 24 V DC with switch operation and single-phase motor .........................146
A.1.5 Direct-on-line starter with group protection, 24 V DC and PLC operation ................................148
A.1.6 Reversing starter 24 V DC with PLC operation ......................................................................149
A.2 Typical circuits for 3RM1 Failsafe ..........................................................................................150
A.2.1 General safety notes .............................................................................................................150
A.2.2 3SK1 safety relay with 3RM13 motor starter via device connector .........................................153
A.2.3 3SK1 safety relay wired with 3RM13 motor starter .................................................................155
A.2.4 3RM13 reversing starter with PLC control, F-DO pp-switching ...............................................157
A.2.5 3RM13 reversing starter with PLC control, F-DO pm-switching ..............................................159
B Directives .................................................................................................................................. 161
B.1 ESD Guidelines .....................................................................................................................161
C Correction sheet ........................................................................................................................ 163
Glossary ................................................................................................................................... 165
Index ........................................................................................................................................ 169
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1
1.1
Responsibility of the user for system configuration and functionality
The SIRIUS 3RM1 motor starters described here have been developed to carry out
switching functions as part of a plant or machine.
The 3RM1 motor starters are available as direct-on-line starters in Standard design without
safety-related shutdown (3RM10) and in Failsafe design with safety-related shutdown
(3RM11 Failsafe), and also as reversing starters without safety-related shutdown (3RM12)
and in Failsafe design with safety-related shutdown (3RM13 Failsafe).
The following must be noted when using 3RM11 Failsafe/3RM13 Failsafe safety-related
motor starters:
A complete safety system consists of sensors, evaluation units, signaling devices and
methods for safety-related shutdown.
The manufacturer is responsible for ensuring safe overall functioning of a plant or machine
with safety-related components.
Siemens AG, its regional offices, and associated companies (hereinafter referred to as
"Siemens") cannot guarantee all the properties of an overall installation or machine that has
not been designed by Siemens.
Nor can Siemens assume liability for recommendations that appear or are implied in the
following description. No new guarantee, warranty, or liability claims beyond the scope of the
Siemens general terms of supply are to be derived or inferred from the following description.
1.2
Required basic knowledge
A general knowledge of the following areas is needed in order to understand this manual:
● Industrial controls
● Digital circuitry
● Automation technology
● Safety engineering
Introduction
1.3 Scope
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1.3
Scope
This manual is valid for SIRIUS 3RM1 motor starters. It contains a description of the motor
starter and its functions. It provides information about configuration, commissioning and
servicing. You will also find information on the infeed system, device connectors and further
accessories in the manual.
To facilitate configuration, the manual contains dimension drawings, circuit diagrams and
technical data of the system components.
SIEMENS reserves the right of including a Product Information for each new component,
and for each component of a later version.
1.4
Definition
In this manual, "3RM1 motor starter" always refers to all variants of the SIRIUS 3RM1 motor
starters.
1.5
Conformity
Standards
All 3RM1 motor starters comply with the following standards:
● IEC 60947-4-2:2011-05
● IEC 60947-4-3:2011-07
The 3RM11 Failsafe and 3RM13 Failsafe motor starters also comply with the following
standards:
● EN 62061: 2005
● EN ISO 13849-1:2008
● IEC 61508-1:2010
● IEC 61508-2:2010
● IEC 61508-3:2010
Approvals, test reports, characteristics
Confirmation of approvals, test certificates and characteristic curves is available via the
Internet (http://www.siemens.com/industrial-controls/approvals).
Introduction
1.6 Further documentation
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11
Degree of protection
The 3RM1 motor starter's degree of protection is IP20.
The infeed system for the 3RM1 motor starter features IP20 degree of protection.
DANGER
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Hazardous electrical voltage can cause electric shock, burns and damage.
To ensure protection against an electric shock hazard with the hinged cover open at the
signaling contacts 95, 96, 98 at a voltage of ≥ 50 V, screw in all terminal screws that are not
needed to clamp conductors.
1.6
Further documentation
Further documents that might be of interest for your configuration:
Title of the manual
Order number1)
3SK1 safety relays 3ZX1012-0SK11-0AC0
1)
The manuals are available in the Service&Support Portal for downloading free of charge.
1.7
Service&Support
Online Support
The Online Support in the Service&Support portal is an extensive information system for all
questions relating to Siemens products and solutions. This service enables direct and central
access to in-depth information concerning the products, systems and applications for
industry and to a large number of programming, configuration and application examples. Its
content is available via a mobile app.
The Technical Forum of the Online Support provides the opportunity for users to swap
information. Support Request allows contact to be established with Siemens experts in
Technical Support.
Siemens Industry Online Support ensures that users in industry are always kept up-to-date
with news, software updates and announcements by means of newsletters and Twitter.
Links:
Service&Support Portal (http://www.support.automation.siemens.com), Online
Support (http://support.automation.siemens.com/WW/view/en/16605022)
Introduction
1.7 Service&Support
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Product Support
Are you looking for product information such as technical data, updates or FAQs? Here, the
"Product Support" section of the Service & Support Portal offers an extensive collection of all
information about the Siemens Industry Automation and Drive Technologies products and
solutions:
● Answers to frequently asked questions (FAQs)
● Updates/upgrades, service packs and support tools for downloading
● Manuals and operating instructions
● Technical data/CAx data
● Approvals and certificates
● Test certificates and characteristic curves
All Product Support information is at your disposal free of charge and around the clock, and
you always get the current version.
Link:
Product Support (http://support.automation.siemens.com/WW/view/en/4000024)
CAx data
The CAx Download Manager provides you with a simple means of gaining access to up-todate product data for your CAx or CAe system.
You configure your own download package with just a few clicks. You can choose from the
following information for products:
● Product images
● 2D dimensional drawings
● 3D models
● Internal circuit diagrams
● EPLAN macro files
● Manuals
● Characteristics
● Operating instructions
● Certificates
● Product master data
Link:
CAx Download Manager
(http://support.automation.siemens.com/WW/view/en/42455541)
Introduction
1.7 Service&Support
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13
Applications & Tools
Applications & Tools supports you with various tools and examples when it comes to solving
your automation tasks. Solutions are presented in interaction with several components in the
system, without focusing on individual products.
● Application examples
● Function blocks & tools
● Background and system descriptions
● Performance statements
● Demonstration systems/videos
Link:
Applications & Tools (http://support.automation.siemens.com/WW/view/en/20208582)
My Documentation Manager
My Documentation Manager enables you to compile your own documentation from our
standard documents (manuals), which are located in the Product Support section. Under
mySupport, you have the opportunity to create and manage you own compilations in a
structure of their own.
Link:
MyDocumentationManager (http://support.automation.siemens.com/WW/view/en/38715968)
Reference
You can find further information on structure and navigation in Online Support here
(http://support.automation.siemens.com/WW/view/en/11774658).
Configurator
Various configurators are available on the Internet to assist you with configuration.
The configurator for 3RM1 motor starters and matching accessories is an easy-to-use
selection and configuration tool. You can select the individual components and plan your
system in accordance with your specific requirements. You can save your selection, export it
as a text file or you can order it directly.
The configurator automatically compiles a document list of the information available in
Service&Support for every component. You can use it as the basis for putting together your
system documentation.
Link:
Configurator (http://www.siemens.com/industrial-controls/configurators)
Introduction
1.8 DataMatrix code
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1.8
DataMatrix code
A DataMatrix code is lasered on the lower terminal cover of all 3RM1 motor starters.
DataMatrix codes are standardized in ISO/IEC 16022. The DataMatrix codes on Siemens
devices use ECC200 coding for powerful error correction.
The following device information is encoded in the DataMatrix codes as a bit stream:
● Order number
● Serial number
● MAC address, if applicable
This information is stored in the following format in the DataMatrix code:
1P Order number + S serial number
(+ 23S MAC address)
Data identifier Net content Separator
Note
The information content is displayed without spaces.
This machine-readable information simplifies and accelerates handling of the respective
devices.
As well as fast access to the serial numbers of the respective devices for unique
identification, the DataMatrix codes simplify communication with Siemens Technical Support.
Introduction
1.9 Correction sheet
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15
SIEMENS Industry Support App
The DataMatrix codes enable in particular extremely fast and convenient access to all the
device-specific information available on an order number in the SIEMENS Service&Support
Portal, such as operating instructions, manuals, data sheets, FAQs, etc.
We offer the SIEMENS Industry Support App free for this purpose. This can be used on
commercially available smartphones and tablet PCs.
The SIEMENS Industry Support App is available for iOS and Android-based terminal devices
and can be accessed via the following links:
Link for Android Link for iOS
1.9
Correction sheet
The appendix to this manual contains a correction sheet for evaluation and feedback. Please
use it to record your suggestions for improvements, additions and corrections, and return the
sheet to us. This will help us to improve the next edition of the manual.
Thank you.
Introduction
1.9 Correction sheet
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2
2.1
General safety notes
DANGER
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Hazardous electrical voltage can cause electric shock, burns and damage.
To ensure protection against an electric shock hazard with the hinged cover open at the
signaling contacts 95, 96, 98 at a voltage of ≥ 50 V, screw in all terminal screws that are not
needed to clamp conductors.
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Turn off and lock out all power supplying this device before working on this device.
CAUTION
Protection against electrostatic charge
When handling and installing the 3RM1 motor starters, ensure that the components are
protected from electrostatic charge. Changes to the system configuration and wiring are
only permissible after disconnection from the power supply.
2.2
Safety information for hazardous areas
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Installation of the motor starters in hazardous areas
The components of the 3RM1 motor starters are not suitable for installation in Class I and
Class II Hazardous Locations.
Please contact your ATEX specialist.
You will find additional information in Chapter "ATEX-certified motor overload protection in
the case of 3RM11/3RM13 Failsafe (Page 32)."
Product-specific safety information
2.3 Safety instructions for safety-related applications
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2.3
Safety instructions for safety-related applications
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Turn off and lock out all power supplying this device before working on this device.
WARNING
Function test interval for 3RM11/3RM13 Failsafe motor starters
In continuous operation, the key safety values apply in the case of a function test interval
(state change of the outputs) ≤ 1 year.
Annual function test
• Actuate the connected sensors.
• Check their effect on the safety relay and the downstream actuators.
• Activate the safety relay via the connected sensors.
• Check their effect on the safety relay and the downstream actuators.
• Defective devices must be replaced.
WARNING
Bypassing the safety function in the event of a fault in the case of 3RM11/3RM13 Failsafe
motor starters with 110 to 230 V AC/110 V DC control supply voltage
The control signal for the control inputs in the case of 3RM11/3RM13 Failsafe motor
starters with 110 to 230 V AC control supply voltage must come from A1. Otherwise, the
safety function is bypassed in the event of a fault. Thus, only relay outputs are admissible
when using a PLC.
Do not use a separate control voltage. Only use the relay outputs when using a PLC.
WARNING
Bypassing the safety function when using device connectors
When operating with a 3SK1 safety relay and a device connector, the supply voltage for
3RM1 motor starters is established via the device connectors.
In this case, do not connect anything to terminals A1 and A2 of the 3RM1 motor starters, in
order to prevent bypassing of the safety function.
Product-specific safety information
2.4 Intended use
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19
WARNING
Failure of the safety function during hybrid operation of Failsafe and Standard motor
starters
Hybrid operation of 3RM10/3RM12 Standard motor starters with 3RM11/3RM13 Failsafe
motor starters in safety-related applications is not admissible.
Only ever use safety-related motor starters (3RM11 Failsafe and 3RM13 Failsafe) in safetyrelated applications.
Note
SILCL 3 to EN 62061:2005, PL e/Cat. 4 to EN ISO 13849-1:2008
The 3RM11 Failsafe and 3RM13 Failsafe safety-related motor starters are designed in such
a way as to allow implementation of safety-related applications up to SILCL 3 in accordance
with EN 62061 and PL e/Cat. 4 in accordance with EN ISO 13849-1.
Note
Use of PELV/SELV power supply units
Power to the 3RM11 Failsafe and 3RM13 Failsafe safety-related motor starters must be
supplied from PELV/SELV power supply units.
2.4
Intended use
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Proper use of hardware products
This equipment is only allowed to be used for the applications described in the catalog and
in the technical description, and only in conjunction with non-Siemens equipment and
components recommended by Siemens.
Correct transport, storage, installation and assembly, as well as careful operation and
maintenance, are required to ensure that the product operates safely and without faults.
EU note: Commissioning is absolutely prohibited until it has been ensured that the machine
in which the component described here is to be installed complies with the stipulations of
the Directive 2006/42/EC.
Product-specific safety information
2.5 Current information about operational safety
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2.5
Current information about operational safety
Important note for maintaining operational safety of your system
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Please take note of our latest information
Systems with safety-related characteristics are subject to special operational safety
requirements on the part of the operator. The supplier is also obliged to comply with special
product monitoring measures. For this reason, we publish a special newsletter containing
information on product developments and features that are (or could be) relevant to
operation of safety-related systems. By subscribing to the appropriate newsletter, you will
ensure that you are always up-to-date and able to make changes to your system, when
necessary:
Siemens newsletter (http://www.industry.siemens.com/newsletter)
Sign on to the following newsletter under "Products & Solutions":
• Control Components and System Engineering News
• Safety Integrated Newsletter
2.6
Declaration of conformity
The manufacturer declares that the safety components of the 3RM1 motor starter series in
the designs marketed by us comply with the applicable basic health and safety requirements
of the EC Directives* stated (including amendments), and that the stated standards* were
applied in their design and construction.
* You can download the complete EC Declaration of Conformity from the Internet
(http://www.siemens.com/industrial-controls/approvals) as a PDF.
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3
3.1
Overview
The 3RM1 motor starter is a compact device with a width of 22.5 mm. The 3RM1 motor
starter comprises combinations of relay contacts, power semiconductors, and a solid-state
overload relay for switching three-phase motors up to 3 kW (at 400 V) and resistive loads up
to 10 A (at AC voltages to 500 V) under normal operating conditions.
Description
3.2 Applications
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3.2
Applications
The 3RM1 motor starters can be used wherever combinations of contactors and overload
relays were previously used.
Thanks to the additional functionality of safety-related shutdown, the 3RM11 Failsafe and
3RM13 Failsafe motor starter variants are ideally suited to safety-related applications up to
SILCL 3 in accordance with EN 62061 and PL e/Cat. 4 in accordance with EN ISO 13849-1.
Short-circuit protection in a load feeder designed in this way must be implemented by
appropriate upstream short-circuit protection devices. These can be, for example, circuit
breakers or appropriate fuses.
You achieve maximum space-savings benefits by means of a group configuration of the
3RM1 motor starters. This enables several 3RM1 motor starters to be protected by one
short-circuit protection device.
The 3RM1 motor starters are used in the following areas, for example:
● Conveyor technology
● Logistics systems
● Production machines
● Machine tools
● Small elevators
Description
3.3 Hybrid technology
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3.3
Hybrid technology
The 3RM1 motor starter combines the benefits of semiconductor technology and relay
technology.
This combination is known as hybrid technology. The hybrid technology in the 3RM1 motor
starter is characterized by the following features:
Switching on
The inrush current in the case of motorized loads is conducted briefly via the
semiconductors.
Advantage: The relay contacts are protected. Longer service life is achieved thanks to
reduced wear and tear.
Current conducting
The continuous current is conducted via relay contacts.
Advantage: Relay contacts cause less thermal losses than semiconductors.
Switching off
Switch-off is implemented again via the semiconductor.
Advantage: The contacts are only slightly burdened by arcs. This results in increased service
life.
Description
3.4 Device versions
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3.4
Device versions
The 3RM1 motor starters are characterized by their compact design and narrow width.
They can be used for easy assembly of fuseless load feeders with SIRIUS motor starter
protectors. Alternatively, combinations with fuses or other short-circuit protection devices are
possible.
This allows implementation of load feeders with coordination type 1 for short-circuit currents
of up to 55 kA at 400 V.
The 3RM1 motor starters are available in four different versions:
Motor starter version
3RM10
3RM11
3RM12
3RM13
Product symbol
Direct-on-line starter ✓ ✓ - Reversing starter - - ✓ ✓
Overload protection with wide setting range ✓ ✓ ✓ ✓
ATEX certification overload protection - ✓ - ✓
Safety-related shutdown up to SILCL 3 to EN 62061, PL e/Cat. 4 to
EN ISO 13849-1
- ✓ - ✓
Connection systems
The 3RM1 motor starters are optionally available with screw connections or push-in
connections.
Push-in connections are a form of spring-loaded terminals allowing fast wiring without tools
for rigid conductors or conductors equipped with end sleeves. For wiring finely-stranded or
stranded conductors without end sleeves on push-in connections, a screwdriver (with
3.0 x 0.5 mm blade) is required. A screwdriver (with 3.0 x 0.5 mm blade) is also required to
disconnect a conductor.
The advantages of the push-in terminals are found, as with all spring-loaded terminals, in
speed of assembly and disassembly and vibration-proof connection. There is no need for the
checking and tightening required with screw connections.
Description
3.4 Device versions
SIRIUS 3RM1 motor starter
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Current ranges
The 3RM1 motor starters are designed for the following rated operational currents of the
loads:
Versions
Adjustable response value current
[A]
Maximum permissible motor power
at 400 V AC [kW]
3RM1.01-..... 0,1 ... 0,5 0,12
3RM1.02-..... 0,4 ... 2 0,75
3RM1.07-.....* 1,6 ... 7 3
* The versions of the 3RM1.07-..... motor starter are also suitable for operating resistive loads (e.g.
heaters) up to a rated operational current of I
AC51
= 10 A.
Control supply voltages
The 3RM1 motor starters are designed for the following control supply voltages:
Versions
Control supply voltage
3RM1...-.AA0. 24 V DC
3RM1...-.AA1. 110 … 230 V AC 50/60 Hz; 110 V DC
Note the following information for the different device versions:
Note
3RM10/3RM12
Standard motor starters
with 24 V DC control supply voltage
The same voltage source (potential) must be used for the control supply voltage and the
control inputs.
The reference point for the control inputs is terminal A2.
Note
3RM10/3RM12 Standard motor starters with 110 to 230 V AC/110 V DC control supply
voltage
The same voltage source (potential) must be used for the control supply voltage and the
control inputs.
The reference point for the control inputs is terminal A2.
When controlling with a PLC, control must be via relay outputs.
There must be no parallel load (e.g. a lamp) connected at the control inputs in the case of
motor starters with the product version E01.
Description
3.4 Device versions
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Note
3RM11/3RM13 Failsafe motor starters with 24 V DC control supply voltage
The control inputs are electrically isolated from the control supply voltage (A1, A2).
The terminals M1 and M2 are the reference point for the control inputs.
For controlling the control inputs, e.g. via the digital outputs of a PLC, a voltage from an
SELV/PELV Class 2 supply is required.
Note
3RM11/3RM13 Failsafe motor starters with 110 to 230 V AC/110 V DC control supply
voltage
The same voltage source (potential) must be used for the control supply voltage and the
control inputs in safety-related applications.
The reference point for the control inputs is terminal A2.
When controlling with a PLC, control must be via relay outputs.
Description
3.5 Functions
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3.5
Functions
3.5.1
Switching the 3RM1 motor starter under normal operating conditions
A typical application area of the 3RM1 motor starter is the switching and protection of
motors. You can also operate the 3RM1 motor starter on resistive loads such as heaters.
Note
Minimum loads must be observed for the 3RM1 motor starters.
You will find additional information in the chapter "Minimum load current (Page 57)".
NOTICE
Damage from operating capacitive loads
When using capacitive loads, the switching components in the 3RM1 motor starter can be
damaged by excessively high making currents.
Do not operate capacitive loads such as frequency converters on the 3RM1 motor starter.
Operation of single-phase capacitor motors is admissible.
NOTICE
Damage during operation on non-sinusoidal voltages
When operating frequency converters, the switching components in the 3RM1 motor starter
can be damaged by non-sinusoidal voltages.
Do not operate the 3RM1 motor starter on outputs of frequency converters.
3.5.1.1
Direct-on-line starter
Using the 3RM1 motor starter as a direct-on-line starter
All 3RM1 motor starters can be used as direct-on-line starters.
To switch the 3RM1 motor starter on, apply the control voltage at input IN1.
After the motor is switched off, the motor starter accepts a new start after 500 ms.
You can also use the versions of the 3RM1 motor starter with a rated operational current up
to 7 A for switching resistive loads up to I
AC51
= 10 A under normal operating conditions.
Description
3.5 Functions
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3.5.1.2
Reversing starter
Using the 3RM1 motor starter as a reversing starter
The 3RM12 and 3RM13 motor starters can be used as reversing starters.
The reversing starter starts the motor when the control voltage is applied at input IN1 in
direction of rotation 1 (no phase swapping), when controlling input IN2 in direction of
rotation 2 (phase change from L1 and L3).
Interlocking of the control inputs
After the motor is switched off, the motor starter accepts a new start after 500 ms.
If you apply control inputs IN1 and IN2 simultaneously, control input IN1 has priority. The
motor starts up in this direction of rotation.
When the motor is running, activation of the second input has no effect.
The figure below shows an example of the effects of the signals at the control inputs on the
direction of rotation of the motor:
1 Controller 1 active
2 Motor ON
1-2 Switch-on delay
3 Control input 1 inactive
4 Motor OFF
3-4 Switch-off delay
5 With simultaneous activation of the control inputs, the motor is started in the clockwise
direction.
6 Additional activation of the second control input has no influence.
7-8 After motor OFF, the motor starter accepts a new start (motor ON) after 500 ms.
Note
Please observe the information about the control supply voltage and the control inputs in the
chapter "Device versions (Page 24)".
Description
3.5 Functions
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3.5.2
Overload protection
3.5.2.1
Protective functions
Overload protection
The 3RM1 motor starter protects three-phase motors against overload. If the current
exceeds the set value, the 3RM1 motor starter switches off within the specified tripping time
and signals the fault via the LEDs and the fault signaling output. You will find the tripping
characteristic in the chapter "Overload protection/device protection characteristic
(Page 125)".
Note
ATEX-certified motor overload protection in the case of 3RM11/3RM13 Failsafe
Overload protection of safety-related 3RM11 Failsafe and 3RM13 Failsafe motor starters is
ATEX-certified up to SILCL 2; see Section "ATEX-certified motor overload protection in the
case of 3RM11/3RM13 Failsafe (Page 32)".
Equipment protection
In addition to the motor protection function, the 3RM1 motor starters also protect themselves
against overload. This means that in the case of 3RM1 motor starters with a rated
operational current of 7 A, an overload trip may occur in the upper current range before the
motor protection trips.
If, for example, 8-fold current flows in the case of an unloaded motor memory module and a
set current of 7 A, tripping takes place after approximately one second.
You will find the tripping characteristic in the chapter "Overload protection/device protection
characteristic (Page 125)".
Phase failure protection
The 3RM1 motor starter is provided with phase failure protection to prevent excessive
temperature rise in the load in double phasing if phase failure occurs.
Depending on whether the phase failure already occurs before the ON command or during
the ON state, the devices respond as described in the table and signal a phase failure.
Standard motor starters
3RM10/3RM12
Failsafe motor starters
3RM11/3RM13
Phase failure before the ON
command
The motor starter switches off
after 5 s.
The motor starter does not
switch on.
Phase failure during the ON
state
The motor starter switches off
after 5 s.
The motor starter switches off
after 5 s.
Description
3.5 Functions
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The fault state is indicated by LEDs and the fault signaling output.
NOTICE
Damage due to asymmetrical current consumption by built-in brakes
When connecting and operating motors with built-in brakes, the energy for releasing the
brakes is taken from the motor connection cables. This can result in substantial asymmetry
in power consumption.
Observe the following measures for all 3RM1 motor starters:
• If the current for the braking facility is taken from two phases, connect the motor cables
that are additionally loaded with braking current to terminals T1 and T3. Observe the
additional braking current when setting the motor current.
• Alternatively, the braking facility can be fed externally.
A further braking facility is possible for 3RM10 and 3RM12 Standard motor starters:
• If the current for the braking facility is taken from just one phase and the neutral
conductor, connect the motor cable that is loaded with the braking current to terminal T2
of the motor starter.
Do not use 3RM11 Failsafe and 3RM13 Failsafe motor starters for such braking
facilities.
NOTICE
Damage from incorrect connection
Incorrect connection of the motor can result in damage.
Connect the motor as specified in the typical circuit diagrams.
You can find circuit diagrams for operating motors with brakes in the chapter "Typical circuits
(Page 143)".
3.5.2.2
Thermal calculation method (motor memory module)
Principle of operation
The electronics continuously calculate a model of the thermal load on the motor dependent
on the operating time and the current load. The motor memory module charges when the
motor is switched on. The motor memory module discharges after the motor is switched off.
Following an overload tripping operation, the motor memory module is fully discharged after
approximately three minutes. You must wait for this cooling time to elapse before you can
acknowledge the fault. If the control supply voltage fails, the 3RM1 motor starter stores the
remaining cooling time. When the control supply voltage is restored, the remaining cooling
time elapses before the motor can be switched on again.
If you initiate a restart within a very short time after switching off the motor, it may be that the
motor memory module has not yet fully discharged. This can result in an extremely fast
overload trip after the restart. During continuous operation ("Warm" motor memory module),
tripping times are reduced depending on the prior load.
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