Siemens SIRIUS 3RT2 User manual

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Industrial Controls
Switchgear
SIRIUS 3RA28 function modules for
mounting on 3RT2 contactors
Manual
02/2019
A5E03656507620A/RS
-AD/005
Introduction
1
Standards
2
Product description
3
Product combinations
4
Functions
5
Configuration
6
Mounting
7
Connection
8
Operation
9
Accessories
10
Technical data
11
Circuit diagrams
12
References
A
Dimension drawings
B

Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
3ZX1012-0RA28-5AC1
Ⓟ
02/2019 Subject to change
Copyright © Siemens AG 2009.
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.

SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005 3
Table of contents
1 Introduction............................................................................................................................................. 5
1.1 Responsibility of the user for system configuration and functionality .......................................5
1.2 Purpose of the manual..............................................................................................................5
1.3 Required basic knowledge........................................................................................................6
1.4 Scope of the manual .................................................................................................................6
1.5 Siemens Industry Online Support .............................................................................................7
1.6 Further documentation..............................................................................................................8
1.7 DataMatrix code........................................................................................................................9
1.8 Siemens Industry Online Support app ....................................................................................10
1.9 Recycling and disposal ...........................................................................................................11
1.10 Support Request.....................................................................................................................11
2 Standards ............................................................................................................................................. 13
3 Product description ............................................................................................................................... 15
3.1 Device versions.......................................................................................................................17
3.2 Performance features .............................................................................................................19
3.3 Applications.............................................................................................................................20
3.3.1 Function modules for direct-on-line start ................................................................................20
3.3.2 Function modules for star-delta (wye-delta) start ...................................................................21
3.4 3RA28 function modules.........................................................................................................24
4 Product combinations............................................................................................................................ 25
5 Functions .............................................................................................................................................. 27
5.1 Overvoltage protection............................................................................................................27
5.2 Time-delayed switching of contactors.....................................................................................27
5.2.1 Response delay ......................................................................................................................27
5.2.2 OFF-delay with control signal .................................................................................................29
5.2.3 OFF-delay without control signal ............................................................................................31
5.2.4 Star-delta (wye-delta) function................................................................................................32
6 Configuration ........................................................................................................................................ 33
6.1 SIRIUS system configurator ...................................................................................................33
6.2 Configuration...........................................................................................................................34
7 Mounting............................................................................................................................................... 39
7.1 Mounting instructions..............................................................................................................39
7.2 Minimum clearances and mounting position ..........................................................................39

Table of contents
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
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7.3 Mounting ................................................................................................................................ 40
7.3.1 Function modules for direct-on-line start (electronic timing relay with semiconductor
output/solid-state time-delay auxiliary switch) ....................................................................... 40
7.3.2 Function module for star-delta (wye-delta) start .................................................................... 42
7.4 Disassembly........................................................................................................................... 49
7.4.1 Function modules for direct-on-line start (solid-state timing relay with semiconductor
output/solid-state time-delay auxiliary switch) ....................................................................... 49
7.4.2 Function module for star-delta (wye-delta) start .................................................................... 51
7.5 Replacing the removable terminal ......................................................................................... 53
8 Connection ........................................................................................................................................... 55
8.1 Connecting the function modules for direct-on-line start ....................................................... 55
8.1.1 Connecting the solid-state timing relay with semiconductor output....................................... 55
8.1.2 Connecting the solid-state time-delay auxiliary switch .......................................................... 57
8.2 Connecting the function module for star-delta (wye-delta) start............................................ 59
8.3 Conductor cross-sections ...................................................................................................... 60
8.3.1 Conductor cross-sections for screw-type connection systems.............................................. 60
8.3.2 Conductor cross-sections for spring-loaded connection systems ......................................... 61
9 Operation.............................................................................................................................................. 63
9.1 Setting the times .................................................................................................................... 63
10 Accessories .......................................................................................................................................... 65
10.1 Sealable cover ....................................................................................................................... 65
11 Technical data ...................................................................................................................................... 67
11.1 Technical data in Siemens Industry Online Support.............................................................. 67
12 Circuit diagrams.................................................................................................................................... 69
12.1 CAx data ................................................................................................................................ 69
12.2 Internal circuit diagrams......................................................................................................... 70
12.3 Typical circuits........................................................................................................................ 71
A References ........................................................................................................................................... 73
A.1 References............................................................................................................................. 73
A.2 Manuals - SIRIUS Modular System ....................................................................................... 74
B Dimension drawings.............................................................................................................................. 77
B.1 CAx data ................................................................................................................................ 77
B.2 Dimensions in mm.................................................................................................................. 78
B.3 Solid-state timing relays with semiconductor output and solid-state time-delay auxiliary
switches ................................................................................................................................. 78
B.4 Star-delta (wye-delta) modules .............................................................................................. 80
Index .................................................................................................................................................... 83

SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
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Introduction
1
1.1 Responsibility of the user for system configuration and functionality
The function modules described here have been developed to carry out different control
tasks as part of a plant or machine. The function modules are available for direct-on-line
start, reversing start and star-delta (wye-delta) start.
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.
Note
Comply in each case with the valid
national assembly regulations and standards when
configuring the system.
1.2 Purpose of the manual
This manual describes the SIRIUS 3RA28 function modules for mounting on SIRIUS
3RT2 contactors and provides the following information:
●Information for integrating the function modules into the system environment.
●Information on necessary hardware components.
●Information on installing, connecting and operating the function modules.
●Technical information such as dimension drawings and unit wiring diagrams.
The information in this manual enables you to configure and commission the function
modules.

Introduction
1.3 Required basic knowledge
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
6Manual, 02/2019, A5E03656507620A/RS-AD/005
1.3 Required basic knowledge
To understand these operating instructions you should have a general knowledge of
automation engineering and low-voltage controls.
1.4 Scope of the manual
The manual is valid for the described function modules. It contains a description of the
devices that are valid at the time of publication.

Introduction
1.5 Siemens Industry Online Support
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005 7
1.5 Siemens Industry Online Support
Information and Service
In Siemens Industry Online Support, you can obtain up-to-date information from our global
support database quickly and simply. To accompany our products and systems, we offer a
wealth of information and services that provide support in every phase of the lifecycle of your
machine or plant – from planning and implementation, through commissioning, up to
maintenance and modernization:
●Product support
●Application examples
●Services
●Forum
●mySupport
Link: Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/)
Product support
You will find here all the information and comprehensive know-how covering all aspects of
your product:
●FAQs
Our answers to frequently asked questions.
●Manuals/operating instructions
Read online or download, available as PDF or individually configurable.
●Certificates
Clearly sorted according to approving authority, type and country.
●Characteristic curves
For support in planning and configuring your system.
●Product announcements
The latest information and news concerning our products.
●Downloads
You can find here updates, service packs, HSPs and much more for your product.
●Application examples
Function blocks, background and system descriptions, performance statements,
demonstration systems, and application examples, clearly explained and represented.
●Technical data
Technical product data for support in planning and implementing your project.
Link: Product support (https://support.industry.siemens.com/cs/ww/en/ps)

Introduction
1.6 Further documentation
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
8Manual, 02/2019, A5E03656507620A/RS-AD/005
mySupport
With "mySupport", your personal workspace, you get the very best out of your Industry
Online Support. Everything to enable you to find the right information every time.
The following functions are now available:
●Personal messages
Your personal mailbox for exchanging information and managing your contacts
●Inquiries
Use our online form for specific solution suggestions, or send your technical inquiry
directly to a specialist in Technical Support
●Notifications
Make sure you always have the latest information - individually tailored to your needs
●Filters
Simple management and re-use of your filter settings from Product Support and the
Technical Forum
●Favorites / Tags
Create your own knowledge database by assigning "Favorites" and "Tags" to documents
– simply and efficiently
●Entries last viewed
Clear presentation of your last viewed entries
●Documentation
Configure your individual documentation from different manuals – quickly and without
complications
●Personal data
Change personal data and contact information here
●CAx data
Simple access to thousands of items of CAx data such as 3D models, 2D dimension
drawings, EPLAN macros and much more
1.6 Further documentation
To install and connect the function modules, you require the operating instructions of the
function modules used.
You can find a list of operating instructions and an overview of the manuals pertaining to the
SIRIUS modular system in the appendix "References (Page 73)".

Introduction
1.7 DataMatrix code
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005 9
1.7 DataMatrix code
A DataMatrix code is lasered on the front of all units of the function modules, on the left on
the basic module.
In the case of basic and coupling modules, there is a further DataMatrix code behind the
labeling plate.
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 front DataMatrix code as a bit stream:
●Article number
●Serial number (abbreviated)
This information is stored in the following format in the DataMatrix code:
1P
Article number
+
S
Data identifier Net content Separator Serial number
The following device information is encoded in the front DataMatrix code behind the labeling
plate as a bit stream:
●Article number
●Serial number
●Where appropriate, MAC address
This information is stored in the following format in the DataMatrix code:
1P
Article number
+
S
Data identifier Net content Separator Serial number
(+ 23S MAC address)
The following device information is encoded in the side rating plate as a bit stream:
●Article number
●Serial number
●Where appropriate, MAC address
This information is stored in the following format in the DataMatrix code:
1P
Article number
+
S
Data identifier Net content Separator Serial number
(+ 23S MAC address)
Note
The information content is displayed without spaces.

Introduction
1.8 Siemens Industry Online Support app
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
10 Manual, 02/2019, A5E03656507620A/RS-AD/005
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.
1.8 Siemens Industry Online Support app
Siemens Industry Online Support app
You can use the Siemens Industry Online Support app to access all the device-specific
information available on the Siemens Industry Online Support portal for a particular article
number, including operating instructions, manuals, datasheets, FAQs etc.
The Siemens Industry Online Support app is available for iOS, Android or Windows Phone
devices. You can download the app from the following links:
Link for Android
Link for iOS
Link for Windows Phone

Introduction
1.9 Recycling and disposal
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005 11
1.9 Recycling and disposal
For environmentally friendly recycling and disposal of your old device, please contact a
company certified for the disposal of old electrical and/or electronic devices and dispose of
the device in accordance with the regulations in your country.
1.10 Support Request
Using the Support Request form in Online Support you can send your query directly to our
Technical Assistance. After describing your query in a few guided steps, you will immediately
be provided with possible suggestions for solving the problem.
Support Request:
Internet (https://support.industry.siemens.com/My/ww/en/requests)

Introduction
1.10 Support Request
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
12 Manual, 02/2019, A5E03656507620A/RS-AD/005

SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
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Standards
2
Applicable regulations, standards, and approvals
The following general regulations and standards apply for the 3RA28 function modules:
General regulations
Explanation
•IEC 61812-1
•DIN VDE 0435 Part 2021
Electrical relays, timing relays
•IEC 61000-6-2
•IEC 61000-6-4
Electromagnetic compatibility
•IEC 60947-5-1
•DIN VDE 0660 Part 200
Low-voltage switchgear and controlgear
•IEC 60721-3-1
•IEC 60721-3-3
Environmental conditions
•IEC 60529 Degree of protection
•CE
•UL
•CSA
•CCC
•C-Tick
•Marine approval
The timing relays have UL and CSA approval for
use all over the world. They have also been pro-
totype-tested by the GL, LRS, and DM shipbuild-
ing companies.
Reference
SIRIUS components have been approved by a whole range of bodies for various sectors
(shipbuilding, etc.). More information and certificates for download are available on the
Internet (https://support.industry.siemens.com/cs/ww/en/ps/16131/cert).
Reference
The standards from Catalog IC 10 "SIRIUS Industrial Controls" in the appendix always apply.
You will find extracts from the most important standards relating to the SIRIUS modular
system in the Internet (http://www.siemens.com/sirius/support) ("SIRIUS - System
Overview", Article Number: 3ZX1012-0RA01-5AC1).

Standards
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
14 Manual, 02/2019, A5E03656507620A/RS-AD/005

SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
Manual, 02/2019, A5E03656507620A/RS-AD/005 15
Product description
3
Applications
Function modules are used to perform various control jobs on automatic production lines and
for processing machines. They are suited to all time-delayed switching operations in control,
starting, protection, and regulation circuits, and ensure a high degree of repeat accuracy for
delay times, once they have been set.
The function modules are subdivided into function modules with communication interfacing
and function modules without communication interfacing.
Function modules
3RA28 function modules Electronic timing relays with semiconductor
output
Solid-state time-delay auxiliary switches
Function module for star-delta (wye-delta) start
3RA27 function modules with communication
connection
Function modules for AS-Interface
Function modules for IO-Link
This chapter describes 3RA28 function modules without a communication connection. You
will find information about function modules with a communication connection in the
corresponding manuals.
Function
Function modules are used to delay switching functions.
System integration
The 3RA28 function modules have been matched to the contactors in the 3RT2 series and to
the contactor relays in the 3RH2 series1) both electrically and mechanically, and can be
integrated in the feeders by directly mounting them on contactors. The function modules can
be used for size S00, S0, S2 and S3 contactors.
The 3RA27 function modules can only be used for communication-capable contactors.
1) The 3RA28 function modules must not be mounted on 3RH2 coupling relays.

Product description
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
16 Manual, 02/2019, A5E03656507620A/RS-AD/005
Connection system
Users can choose either function modules with screw-type connection system or function
modules with spring-loaded connection system.
Reference
More information ...
Can be found in ...
About 3RA27 function modules for AS-Interface "SIRIUS - SIRIUS 3RA2712 function modules for
AS-Interface
(http://support.automation.siemens.com/WW/view
/en/39318922)" manual (3ZX1012-0RA27-0AC0)
About 3RA27 function modules for IO-Link "SIRIUS - SIRIUS 3RA2711 function modules for
IO-Link
(http://support.automation.siemens.com/WW/view
/en/39319600)" manual (3ZX1012-0RA27-1AC1)
About function modules for reversing start Appendix entitled "References" under "Manuals -
SIRIUS Modular System (Page 74)" in the
"SIRIUS - SIRIUS 3RT Contactors/Contactor
Assemblies" manual

Product description
3.1 Device versions
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
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3.1 Device versions
Device versions
●Function modules for direct-on-line start
–Solid-state timing relays with semiconductor output
–Solid-state time-delay auxiliary switches
●Function modules for star-delta (wye-delta) start
Characteristics
The table below provides an overview of the versions of 3RA28 function modules for
mounting on 3RT2 contactors and 3RH2 contactor relays1).
1) The 3RA28 function modules must not be mounted on 3RH2 coupling relays.
Characteristic
Versions
Function modules for direct-on-line start
Function module for
star-delta (wye-delta) start
Electronic timing relay with semi-
conductor output
Solid-state time-delay auxiliary
switches
Function ON-delay and OFF-delay with con-
trol signal
ON and OFF-delay
with/without control signal
Star-delta (wye-delta) function
Article num-
bers
3RA2811-.CW10/
3RA2812-.DW10
3RA2831-.D.10/
3RA2832-.D.10
3RA2813-..W10/
3RA2814-..W10/
3RA2815-..W10
3RA2816-0EW20 comprising:
1 basic module
2 coupling modules
Size For size S00, S0
contactors.
For size S2 and
S3 contactors.
One module for size S00, S0, S2 and S3 contactors.
Width
45 mm
135 mm (3 x 45 mm)
Connection
system
Screw-type, spring-loaded Without terminals (can be used for
contactor screw-type and spring-
loaded connection systems)

Product description
3.1 Device versions
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
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3RA28 version overview
Article number
Function
Output
Screw connection
3RA2811-1CW10 ON-delay, two-wire Thyristor
3RA2812-1DW10
OFF-delay with control signal
PowerMos
3RA2831-1DG10
ON-delay
PowerMos
3RA2831-1DH10
ON-delay
PowerMos
3RA2832-1DG10
OFF-delay with control signal
PowerMos
3RA2832-1DH10
OFF-delay with control signal
PowerMos
3RA2813-1AW10
ON-delay
1 CO contact
3RA2813-1FW10 ON-delay 1 NO contact
1 NC contact
3RA2814-1AW10
OFF-delay with control signal
1 CO contact
3RA2814-1FW10 OFF-delay with control signal 1 NO contact
1 NC contact
3RA2815-1AW10
OFF-delay without control signal
1 CO contact
3RA2815-1FW10 OFF-delay without control signal 1 NO contact
1 NC contact
Spring-loaded connection
3RA2811-2CW10
ON-delay, two-wire
Thyristor
3RA2812-2DW10
OFF-delay with control signal
PowerMos
3RA2831-2DG10
ON-delay
PowerMos
3RA2831-2DH10
ON-delay
PowerMos
3RA2832-2DG10
OFF-delay with control signal
PowerMos
3RA2832-2DH10
OFF-delay with control signal
PowerMos
3RA2813-2AW10
ON-delay
1 CO contact
3RA2813-2FW10 ON-delay 1 NO contact
1 NC contact
3RA2814-2AW10
OFF-delay with control signal
1 CO contact
3RA2814-2FW10 OFF-delay with control signal 1 NO contact
1 NC contact
3RA2815-2AW10
OFF-delay without control signal
1 CO contact
3RA2815-2FW10 OFF-delay without control signal 1 NO contact
1 NC contact
Plug-in, without terminals
3RA2816-0EW20 Star-delta (wye-delta) function module 2 NO contacts
(internal)
3RA2910-0
Sealable cover cap
—
The 8th digit of the article number
designates the terminal type:
0: No terminals
1: Screw
-type terminals
2: Spring-loaded terminals

Product description
3.2 Performance features
SIRIUS 3RA28 function modules for mounting on 3RT2 contactors
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3.2 Performance features
Features
The function modules have the following features:
Function module
Features
Function modules
for direct-on-line
start
Electronic timing relays
with semiconductor
output
•ON-delay (1 NO contact)
•OFF-delay with control signal (1 NO contact)
•Versions with screw-type and spring-loaded connection systems
Solid-state time-delay
auxiliary switches
•ON-delay (1 NO contact + 1 NC contact or 1 CO contact)
•ON-delay with/without control signal (1 NO contact + 1 NC contact or
1 CO contact)
•Versions with screw-type and spring-loaded connection systems
Function modules
for star-delta (wye-
delta) start
Star-delta (wye-delta)
start
•Control exclusively via contactor A1/A2 – no further control circuit
wiring required
•No control current wiring thanks to plug-in technology and connecting
cables
•Interchange proof construction
•Timing function for switching over from star to delta in basic module
•Electrical interlock without additional wiring
•Changeover delay time set to a non-adjustable value of ≥ 50 ms

Product description
3.3 Applications
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3.3 Applications
3.3.1 Function modules for direct-on-line start
Applications
The function modules for direct-on-line start are used for the time-delayed switching of
contactors. The following function modules are available:
●Electronic timing relay with semiconductor output
●Solid-state time-delay auxiliary switch with 1 CO contact or 1 NC contact/1 NO contact
Features of direct-on-line starters
The function module for direct-on-line start has the following features:
●All modules with wide control voltage range
●Integrated varistor (surge suppressor)
●Applicable for size S00, S0, S2 and S3 contactors.
The following table is an overview of which function modules you can use for which size
of contactors.
S00
S0
S2
S3
3RA2811, 3RA2812
X
X
-
-
3RA2831, 3RA2832 - - X X
3RA2813, 3RA2814, 3RA2815
X
X
X
X
●Large wide voltage range (24 ... 240 V AC/DC), except for 3RA2831, 3RA2832
●Extended operating ranges (24 ... 90 V, 90 ... 240 V), for 3RA2831 and 3RA2832 only
●3 selectable time ranges (1 s, 10 s, 100 s)
●Operating time adjustment from 5 ... 100% per time range
●Switch position indicator for the contactor below (plunger)
Reference
More information ...
Is available in ...
About application areas Chapter entitled "Configuration (Page 33)"