Siemens SIMATIC ET 200SP User guide

Distributed I/O system
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SIMATIC
ET 200SP
Distributed I/O system
System Manual
12/2015
A5E03576849
-AF
Preface
Guide to documentation
1
System overview
2
Application planning
3
Installation
4
Wiring
5
Configuring
6
Basics of program execution
7
Protection
8
Configuration control (option
handling)
9
Commissioning
10
SIMATIC memory card
11
Maintenance
12
Test functions and
eliminating problems
13
Technical specifications
14
Dimension drawings
A
Accessories/spare parts
B
Calculating the leakage
resistance
C
Service & Support
D

Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E03576849-AF
Ⓟ
12/2015 Subject to change
Copyright © Siemens AG 2012 - 2015.
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
mai
ntenance 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.

Distributed I/O system
4System Manual, 12/2015, A5E03576849-AF
Preface
Purpose of the documentation
This documentation provides important information on configuring, installing, wiring and
commissioning the ET 200SP distributed I/O system.
Basic knowledge required
A basic knowledge of automation technology is required to understand the documentation.
Validity of the documentation
This documentation applies to the distributed I/O system, ET 200SP.
Conventions
Please pay particular attention to notes highlighted as follows:
Note
Notes contain important information on the product, handling the product or on part of the
documentation to which you should pay particular attention.

Preface
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 5
Special information
Note
Important note for maintaining operational safety of your plant
Plants with safety
-related features are subject to special operational safety requirements on
the part of the operator. Even suppliers are required to observe special measures during
product monitoring. This is why we inform you about product developments and features that
are or may become important for the operation of plants with regard to safety in a special
newsletter. You need to subscribe to the corresponding newsletter to ensure that you always
remain up
-to-date and are able to make any necessary changes to your plant regarding
operational safety should the need arise. Please go online
(
https://www.automation.siemens.com/WW/newsletter/guiThemes2Select.aspx?HTTPS=RE
DIR&subjectID=2
) and register for the following newsletters:
•
SIMATIC S7-300/S7-300F
•
SIMATIC S7-400/S7-400H/S7-400F/FH
•
SIMATIC S7-1500/SIMATIC S7-1500F
•
Distributed I/O
•
SIMATIC Industrial Software
Select the "Current"
check box for these newsletters.
Note
When F
-CPUs are used in safety mode, note the description of the fail-
safe system SIMATIC
Safety Programming and Operating Manual SIMATIC Safety
-
Configuring and Programming
(
http://support.automation.siemens.com/WW/view/en/54110126).
Recycling and disposal
The products are low in pollutants and can be recycled. For environmentally compliant
recycling and disposal of your electronic waste, please contact a company certified for the
disposal of electronic waste.
Additional support
●Information about the technical support available can be found in the appendix to this
documentation (Page 251).
●The technical documentation for the individual SIMATIC products and systems is
available on the Internet (http://www.siemens.com/simatic-tech-doku-portal).
●The online catalog and the ordering system are available on the Internet
(https://mall.industry.siemens.com).

Preface
Distributed I/O system
6System Manual, 12/2015, A5E03576849-AF
Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, solutions, machines, equipment and/or networks. They are
important components in a holistic industrial security concept. With this in mind, Siemens’
products and solutions undergo continuous development. Siemens recommends strongly
that you regularly check for product updates.
For the secure operation of Siemens products and solutions, it is necessary to take suitable
preventive action (e.g. cell protection concept) and integrate each component into a holistic,
state-of-the-art industrial security concept. Third-party products that may be in use should
also be considered. You can find more information about industrial security on the Internet
(http://www.siemens.com/industrialsecurity).
To stay informed about product updates as they occur, sign up for a product-specific
newsletter. You can find more information on the Internet
(http://support.automation.siemens.com).

Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 7
Table of contents
Preface ................................................................................................................................................... 4
1 Guide to documentation ........................................................................................................................ 11
2 System overview................................................................................................................................... 13
2.1 What is the SIMATIC ET 200SP distributed I/O system?.......................................................13
2.2 What are fail-safe automation systems and fail-safe modules? .............................................16
2.3 How are SIMATIC Safety F-systems structured with ET 200SP?..........................................17
2.4 Components............................................................................................................................20
3 Application planning.............................................................................................................................. 26
3.1 Selecting a suitable BaseUnit .................................................................................................26
3.1.1 Digital, fail-safe, communication, technology or analog modules without temperature
measurement ..........................................................................................................................29
3.1.2 Analog modules with temperature measurement ...................................................................30
3.2 Hardware configuration...........................................................................................................31
3.3 Forming potential groups ........................................................................................................32
3.3.1 Basics......................................................................................................................................32
3.3.2 Forming potential groups with AC I/O modules ......................................................................35
3.3.3 Forming potential groups with fail-safe modules ....................................................................36
3.4 Configuration examples for potential groups ..........................................................................37
4 Installation ............................................................................................................................................ 39
4.1 Basics......................................................................................................................................39
4.2 Mounting the CPU/interface module.......................................................................................42
4.3 Installing the CM DP communication module.........................................................................44
4.4 Installing BaseUnits ................................................................................................................45
4.5 Installing the server module....................................................................................................48
5 Wiring ................................................................................................................................................... 49
5.1 Rules and regulations for operation........................................................................................49
5.2 Additional rules and regulations for the operation of the ET 200SP with fail-safe
modules ..................................................................................................................................51
5.2.1 Safety extra-low voltage (SELV) for fail-safe modules ...........................................................51
5.2.2 Requirements for sensors and actuators for fail-safe modules ..............................................52
5.2.3 Crosstalk of digital input/output signals ..................................................................................55
5.3 Operating the ET 200SP on grounded incoming supply ........................................................55
5.4 Electrical configuration of the ET 200SP ................................................................................58
5.5 Wiring rules .............................................................................................................................60

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Distributed I/O system
8System Manual, 12/2015, A5E03576849-AF
5.6 Wiring BaseUnits.................................................................................................................... 62
5.7 Connecting cable shields ....................................................................................................... 64
5.8 Connecting the supply voltage to the CPU/interface module ................................................ 66
5.9 Connecting interfaces for communication.............................................................................. 68
5.9.1 Connecting PROFINET IO to the CPU/interface module via the bus adapter BA
2xRJ45 ................................................................................................................................... 68
5.9.2 Connecting PROFINET IO to the CPU/interface module via the BA 2xFC BusAdapter ....... 70
5.9.3 Connecting PROFINET IO to the CPU/interface module via BA 2xSCRJ BusAdapter......... 74
5.9.4 Connecting PROFINET IO to the interface module via the BA SCRJ/RJ45 BusAdapter...... 77
5.9.5 Connecting PROFINET IO to the interface module via the BA SCRJ/FC BusAdapter ......... 79
5.9.6 Connecting PROFINET IO to the interface module via the BA 2xLC BusAdapter ................ 81
5.9.7 Connecting PROFINET IO to the interface module via the BA LC/RJ45 BusAdapter .......... 84
5.9.8 Connecting PROFINET IO to interface module via BA LC/FC BusAdapter .......................... 86
5.9.9 Connecting PROFINET IO (port P3) to the CPU ................................................................... 87
5.9.10 Connecting the PROFIBUS DP interface to the interface module/communications
module CM DP....................................................................................................................... 89
5.10 Plugging in I/O modules and BU covers ................................................................................ 90
5.11 Labeling ET 200SP ................................................................................................................ 91
5.11.1 Factory markings.................................................................................................................... 91
5.11.2 Optional markings .................................................................................................................. 93
5.11.3 Applying color identification labels ......................................................................................... 94
5.11.4 Applying labeling strips .......................................................................................................... 96
5.11.5 Applying reference identification labels ................................................................................. 96
6 Configuring ........................................................................................................................................... 97
6.1 Configuring ET 200SP ........................................................................................................... 97
6.2 Configuring the CPU ............................................................................................................ 100
6.2.1 Reading out the configuration .............................................................................................. 100
6.2.2 Addressing ........................................................................................................................... 102
6.2.3 Process images and process image partitions .................................................................... 104
6.2.3.1 Process image - overview.................................................................................................... 104
6.2.3.2 Automatically updating process image partitions................................................................. 105
6.2.3.3 Update process image partitions in the user program......................................................... 105
6.2.4 Backing up and restoring the CPU configuration................................................................. 106
6.2.4.1 Overview .............................................................................................................................. 106
6.2.4.2 Backup from online device................................................................................................... 108
6.2.4.3 Upload from device (software)............................................................................................. 111
6.2.4.4 Upload device as new station .............................................................................................. 113
6.2.4.5 Snapshot of the monitor values ........................................................................................... 115
6.2.4.6 Overwrite actual values of a block with snapshot values .................................................... 117
6.3 Configuring the interface module ......................................................................................... 119
6.4 Assignment of the F-destination address for fail-safe modules........................................... 119
7 Basics of program execution ................................................................................................................120
7.1 Events and OBs ................................................................................................................... 120
7.2 CPU overload behavior........................................................................................................ 123
7.3 Asynchronous instructions ................................................................................................... 124

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Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 9
8 Protection ........................................................................................................................................... 133
8.1 Overview of the protective functions of the CPU ..................................................................133
8.2 Configuring access protection for the CPU...........................................................................133
8.3 Using the user program to set additional access protection.................................................136
8.4 Know-how protection ............................................................................................................137
8.5 Copy protection.....................................................................................................................140
9 Configuration control (option handling) ................................................................................................ 142
9.1 Configuring............................................................................................................................145
9.2 Creating the control data record ...........................................................................................147
9.2.1 Introduction ...........................................................................................................................147
9.2.2 Control data record for an ET 200SP CPU...........................................................................149
9.2.3 Control data record for an interface module .........................................................................151
9.2.4 Feedback data record for interface modules ........................................................................155
9.2.5 Data records and functions...................................................................................................157
9.3 Transferring control data record in the startup program of the CPU ....................................158
9.4 Behavior during operation.....................................................................................................162
9.5 Examples of configuration control.........................................................................................163
10 Commissioning ................................................................................................................................... 168
10.1 Overview ...............................................................................................................................168
10.2 Commissioning the ET 200SP for PROFINET IO ................................................................170
10.2.1 ET 200SP CPU as an IO controller ......................................................................................170
10.2.2 ET 200SP CPU as an I-device .............................................................................................172
10.2.3 ET 200SP as an IO device ...................................................................................................174
10.3 Commissioning the ET 200SP on PROFIBUS DP ...............................................................175
10.3.1 ET 200SP as a DP master....................................................................................................175
10.3.2 ET 200SP as I-slave .............................................................................................................177
10.3.3 ET 200SP as a DP slave ......................................................................................................179
10.4 Startup of the ET 200SP with empty slots ............................................................................180
10.5 Removing/inserting a SIMATIC memory card on the CPU...................................................180
10.6 Operating modes of the CPU................................................................................................182
10.6.1 STARTUP mode ...................................................................................................................182
10.6.2 STOP mode ..........................................................................................................................185
10.6.3 RUN mode ............................................................................................................................185
10.6.4 Operating mode transitions...................................................................................................186
10.7 CPU memory reset ...............................................................................................................187
10.7.1 Automatic memory reset.......................................................................................................188
10.7.2 Manual memory reset ...........................................................................................................189
10.8 Reassigning parameters during operation............................................................................190
10.9 Identification and maintenance data .....................................................................................191
10.9.1 Reading out and entering I&M data ......................................................................................191
10.9.2 Data record structure for I&M data .......................................................................................193
10.10 Shared commissioning of projects........................................................................................195

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Distributed I/O system
10 System Manual, 12/2015, A5E03576849-AF
11 SIMATIC memory card.........................................................................................................................196
11.1 SIMATIC memory card - overview ....................................................................................... 196
11.2 Setting the card type ............................................................................................................ 201
11.3 Data transfer with SIMATIC memory cards ......................................................................... 202
12 Maintenance ........................................................................................................................................203
12.1 Removing and inserting I/O modules................................................................................... 203
12.2 Changing the type of an I/O module .................................................................................... 206
12.3 Replacing an I/O module ..................................................................................................... 208
12.4 Replacing the terminal box on the BaseUnit........................................................................ 209
12.5 Firmware update .................................................................................................................. 211
12.6 Resetting CPU/interface module (PROFINET) to factory settings ...................................... 217
12.6.1 Resetting the CPU to factory settings .................................................................................. 217
12.6.2 Resetting interface module (PROFINET IO) to factory settings .......................................... 219
12.6.3 Resetting the interface module (PROFINET IO) to factory settings with a RESET
button ................................................................................................................................... 220
12.7 Fault reactions with fail-safe modules.................................................................................. 222
13 Test functions and eliminating problems...............................................................................................224
13.1 Test functions....................................................................................................................... 224
13.2 Reading out/saving service data.......................................................................................... 227
14 Technical specifications .......................................................................................................................229
14.1 Standards and approvals ..................................................................................................... 230
14.2 Electromagnetic compatibility .............................................................................................. 235
14.3 Electromagnetic compatibility of fail-safe modules .............................................................. 237
14.4 Shipping and storage conditions.......................................................................................... 239
14.5 Mechanical and climatic environmental conditions.............................................................. 239
14.6 Information on insulation, protection class, degree of protection and rated voltage ........... 241
14.7 Use of the ET 200SP in zone 2 potentially explosive atmospheres .................................... 242
A Dimension drawings.............................................................................................................................243
A.1 Shield connector .................................................................................................................. 243
A.2 Labeling strip........................................................................................................................ 243
A.3 Reference identification labels ............................................................................................. 244
B Accessories/spare parts.......................................................................................................................245
B.1 Lightning protection and overvoltage protection for fail-safe modules ................................ 248
C Calculating the leakage resistance .......................................................................................................249
D Service & Support ................................................................................................................................251
Glossary ..............................................................................................................................................254
Index ...................................................................................................................................................268

Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 11
Guide to documentation
1
The documentation for the SIMATIC ET 200SP distributed I/O system is arranged into three
areas.
This arrangement enables you to access the specific content you require.
Basic information
The system manual describes in detail the configuration, installation, wiring and
commissioning of the SIMATIC ET 200SP. distributed I/O system. The STEP 7 online help
supports you in the configuration and programming.
Device information
Product manuals contain a compact description of the module-specific information, such as
properties, terminal diagrams, characteristics and technical specifications.
General information
The function manuals contain detailed descriptions on general topics regarding the SIMATIC
ET 200SP distributed I/O system, e.g. diagnostics, communication, Web server, designing
interference-free controllers.
You can download the documentation free of charge from the Internet
(http://w3.siemens.com/mcms/industrial-automation-systems-simatic/en/manual-
overview/tech-doc-et200/Pages/Default.aspx).
Changes and supplements to the manuals are documented in a Product Information.

Guide to documentation
Distributed I/O system
12 System Manual, 12/2015, A5E03576849-AF
Manual Collection ET 200SP
The Manual Collection contains the complete documentation on the SIMATIC ET 200SP
distributed I/O system gathered together in one file.
You can find the Manual Collection on the Internet
(http://support.automation.siemens.com/WW/view/en/84133942).
My Documentation Manager
The My Documentation Manager is used to combine entire manuals or only parts of these to
your own manual.
You can export the manual as PDF file or in a format that can be edited later.
You can find the My Documentation Manager on the Internet
(http://support.industry.siemens.com/My/ww/en/documentation).
Application examples
Applications examples support you with various tools and examples for solving your
automation tasks. Solutions are shown in interplay with multiple components in the system -
separated from the focus in individual products.
You can find application examples on the Internet
(http://support.industry.siemens.com/cs/ww/en/ps/ae).
CAx Download Manager
The CAx Download Manager is used to access the current product data for your CAx or CAe
systems.
You configure your own download package with a few clicks.
In doing so you can select:
●Product images, 2D dimension drawings, 3D models, internal circuit diagrams, EPLAN
macro files
●Manuals, characteristics, operating manuals, certificates
●Product master data
You can find the CAx Download Manager on the Internet
(http://support.industry.siemens.com/my/ww/en/CAxOnline).
TIA Selection Tool
With the TIA Selection Tool, you can select, configure and order devices for Totally
Integrated Automation (TIA).
This tool is the successor of the SIMATIC Selection Tool and combines the known
configurators for automation technology into one tool.
With the TIA Selection Tool, you can generate a complete order list from your product
selection or product configuration.
You can find the TIA Selection Tool on the Internet
(http://w3.siemens.com/mcms/topics/en/simatic/tia-selection-tool).

Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 13
System overview
2
2.1
What is the SIMATIC ET 200SP distributed I/O system?
SIMATIC ET 200SP
SIMATIC ET 200SP is a scalable and highly flexible distributed I/O system for connecting
process signals to a higher-level controller via a fieldbus.
Customer benefits of the system
Figure 2-1 SIMATIC ET 200SP distributed I/O system - Customer benefits

System overview
2.1 What is the SIMATIC ET 200SP distributed I/O system?
Distributed I/O system
14 System Manual, 12/2015, A5E03576849-AF
Area of application
Thanks to its multifunctionality, the SIMATIC ET 200SP distributed I/O system is suitable for
a wide range of applications. Its scalable design allows you to tailor your configuration to
local requirements. Different CPUs/interface modules are available for connection to
PROFINET IO or PROFIBUS DP.
SIMATIC ET 200SP with CPU allows intelligent pre-processing to relieve the higher-level
controller. The CPU can also be used as standalone device.
By using fail-safe CPUs, you can implement applications for safety engineering.
Configuration and programming of your safety program takes place the same way as for
standard CPUs.
A wide range of I/O modules rounds off the product range.
SIMATIC ET 200SP is designed with degree of protection IP20 and is intended for
installation in a control cabinet.
Configuration
The SIMATIC ET 200SP distributed I/O system is installed on a mounting rail. It consists of:
●CPU/interface module
●Up to 64 I/O modules which can be plugged into BaseUnits in any combination
●A server module that completes the configuration of the ET 200SP.

System overview
2.1 What is the SIMATIC ET 200SP distributed I/O system?
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 15
Configuration example
①
CPU/interface module
②
Light-colored BaseUnit BU..D with infeed of supply voltage
③
Dark-colored BaseUnits BU..B for extending the potential group
④
I/O module
⑤
Server module (included in the scope of supply of the CPU/interface module)
⑥
BusAdapter
⑦
Mounting rail
⑧
Reference identification label
Figure 2-2 Configuration example of the ET 200SP

System overview
2.2 What are fail-safe automation systems and fail-safe modules?
Distributed I/O system
16 System Manual, 12/2015, A5E03576849-AF
2.2
What are fail-safe automation systems and fail-safe modules?
Fail-safe automation systems
Fail-safe automation systems (F-systems) are used in systems with higher safety
requirements. F-systems control processes and ensure that they are in a safe state
immediately after shutdown. In other words, F-systems control processes in which an
immediate shutdown does not endanger persons or the environment.
Safety Integrated
Safety Integrated is the integrated safety concept for automation and drive technology from
Siemens.
Proven technologies and systems from automation technology are used for safety systems.
Safety Integrated includes the complete safety sequence, ranging from sensor, actuator and
fail-safe modules right through to the controller, including safety-related communication via
standard fieldbuses. Drives and controllers handle safety tasks in addition to their actual
functions.
Fail-safe modules
The key difference between fail-safe modules (F-modules) and standard modules is that they
have an internal two-channel design. This means the two integrated processors monitor
each other, automatically test the input and output circuits, and switch the fail-safe module to
a safe state in the event of a fault.
The F-CPU communicates with a fail-safe module via the safety-related PROFIsafe bus
profile.
Area of application of ET 200SP with fail-safe I/O modules
By using the ET 200SP distributed I/O system with fail-safe I/O modules, you are replacing
conventional safety engineering configurations. This includes the replacement of switching
devices for emergency STOP, protective door monitors, two-hand operation, etc.

System overview
2.3 How are SIMATIC Safety F-systems structured with ET 200SP?
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 17
2.3
How are SIMATIC Safety F-systems structured with ET 200SP?
SIMATIC Safety F-system with ET 200SP
The figure below shows an example of a configuration for a SIMATIC Safety F-system with
ET 200SP distributed I/O system and PROFINET IO. The PROFINET IO lines can be set up
with copper cable, fiber-optic cable or WLAN.
Fail-safe I/O modules and non-fail-safe I/O modules can be combined in an ET 200SP
configuration.
The fail-safe IO controller (F-CPU) exchanges safety-related and non-safety-related data
with fail-safe and non-fail-safe ET 200SP modules.
Figure 2-3 Fail-safe SIMATIC Safety automation system (sample configuration)
Fail-safe ET 200SP I/O modules
The following fail-safe I/O modules are available for the ET 200SP distributed I/O system:
●Fail-safe power modules are used to supply the potential group load voltage and for the
safety-related tripping of the load voltage for non-fail-safe output modules.
●Fail-safe digital input modules detect the signal states of safety-related sensors and send
the relevant safety frames to the F-CPU.
●Fail-safe digital output modules are suitable for safety-related shutdown procedures with
short circuit and cross-circuit protection up to the actuator.

System overview
2.3 How are SIMATIC Safety F-systems structured with ET 200SP?
Distributed I/O system
18 System Manual, 12/2015, A5E03576849-AF
Example of a configuration with fail-safe I/O modules
①
Interface module
②
Light-colored BaseUnitBU..D with infeed of supply voltage
③
Dark-colored BaseUnitsBU..B for conducting the potential group further
④
I/O module
⑤
Server module (ships with the interface module)
⑥
Fail-safe I/O modules
⑦
BusAdapter
⑧
Mounting rail
⑨
Reference identification label
Figure 2-4 Example of a configuration of the ET 200SP with fail-safe I/O modules
Hardware and software requirements
ET 200SP fail-safe modules are supported by IM155-6PN ST interface modules as of
firmware V1.1.1, IM155-6PN HF as of firmware V2.0 and IM155-6DP HF as of firmware
V1.0.
You need the STEP 7 Safety Advanced option package V12 including HSP 54 or higher to
configure and program the ET 200SP fail-safe modules with the SIMATIC Safety F-system.
You need the F-Configuration Pack V5.5 SP10 to configure and program the ET 200SP fail-
safe modules with the Distributed Safety F-system.
You need the F-Configuration Pack V5.5 SP12 to configure and program the ET 200SP fail-
safe modules with the Distributed Safety F/FH system.

System overview
2.3 How are SIMATIC Safety F-systems structured with ET 200SP?
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF 19
Use in safety mode only
Safety mode is the F-I/O operating mode that allows safety-related communication using
safety frames.
You can only use the ET 200SP fail-safe I/O modules in safety mode. They cannot be used
in non-fail-safe mode.
Achievable safety classes
The fail-safe modules are equipped with integrated safety functions for safety mode.
You can achieve the safety classes of the table below:
●With the appropriate parameter assignment of the safety functions in STEP 7,
●With a specific combination of fail-safe and non-fail-safe I/O modules as well as
●With a special arrangement and wiring of the sensors and actuators
Table 2- 1 Safety classes that can be achieved with ET 200SP in safety mode
Safety class in safety mode
According to IEC 61508
According to ISO 13849-1:2006
SIL2
Category 3
(PL) Performance Level d
SIL3
Category 3
(PL) Performance Level e
SIL3 Category 4 (PL) Performance Level e
Additional information
The applications and wiring for the particular safety class are described in the manuals of the
fail-safe I/O modules.

System overview
2.4 Components
Distributed I/O system
20 System Manual, 12/2015, A5E03576849-AF
2.4
Components
Basic components of the ET 200SP distributed I/O system
Table 2- 2 Basic components of the ET 200SP
Basic component
Function
Figure
Mounting rail in accord-
ance with EN 60715
The mounting rail is the rack of the ET 200SP.
The ET 200SP is installed on the mounting
rail.
CPU/Fail-safe CPU The (F) CPU:
•Runs the user program. The F-CPU also
runs the safety program.
•Can be used as an IO controller or I-
device on PROFINET IO or as a
standalone CPU
•Links the ET 200SP to the IO devices or
the IO controller
•Exchanges data with the I/O modules via
the backplane bus.
Additional CPU functions:
•Communication via PROFIBUS DP (the
CPU can be used as a DP master or DP
slave in combination with the CM DP
communication module)
•Integrated web server
•Integrated technology
•Integrated trace functionality
•Integrated system diagnostics
•Integrated safety
•Safety mode (when using fail-safe CPUs)