Siemens Simatic S7-300 User manual

Fail-safe signal modules
SIMATIC
A
utomation System S7-300 ET 200M
Distributed I/O Device
Fail-safe signal modules
Installation and Operating Manual
01/2010
A5E00085586-10
Preface
Product overview
1
Configuration options
2
Configuration and parameter
assignment
3
Addressing and installation
4
Wiring
5
Fault reaction and
diagnostics
6
General technical data
7
Digital modules
8
Analog modules
9
Safety protector
10
Diagnostics data of the
signal modules
A
Dimensional drawings
B
Accessories and order
numbers
C
Response times
D
Switching capacitive and
inductive loads
E
The following supplement is part of this documentation:
No. Product Information Drawing number Edition
1 Product Information to the
manual edition 01/2010 S7-300
Distributed I/O device ET 200 M -
Fail-safe signal modules
A5E03004206-01 05/2010

Legal information
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
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the corresponding information is not taken into
account.
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 for the specific task, 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 adhered to. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this
publication may be trademarks whose use by third parties for their own purposes could violate the rights of the
owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E00085586-10
Ⓟ 02/2010
Copyright © Siemens AG 2010.
Technical data subject to change
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Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10 3
Preface
Purpose of this manual
This reference manual provides a pool of information about the control functions, the
functionality and technical data of the fail-safe signal modules of a S7-300 system.
Basic knowledge required
Working with this manual requires general knowledge of automation engineering. It is also
assumed that you have sufficient knowledge of the
STEP 7 Basic Software, of the S7-300
automation system, and of the ET 200M distributed I/O device.
Scope of this manual
Module Order number as of product version
Safety protector 6ES7195-7KF00-0XA0 03
Bus module for safety protector 6ES7195-7HG00-0XA0 01
SM 326; DI 24 x DC 24 V 6ES7326-1BK02-0AB0 01
SM 326; DI 8 x NAMUR 6ES7326-1RF00-0AB0 05
SM 326; DO 8 x DC 24V/2A PM 6ES7326-2BF41-0AB0 01
SM 326; DO 10 x DC 24V/2A 6ES7326-2BF01-0AB0 01
SM 326; F-DO 10 x DC 24V/2A PP 6ES7326-2BF10-0AB0 01
SM 336; AI 6 x 13Bit 6ES7336-1HE00-0AB0 04
SM 336; F-AI 6 x 0/4 ... 20 mA HART 6ES7336-4GE00-0AB0 01
What's new compared to the previous version
This manual was updated and supplemented with the description of:
● Support of PROFINET IO
● the new functions of the SM 326; F-DO 10 x DC 24V/2A PP
● the new functions of the SM 326; DI 24 x DC 24 V
● the new functions of the SM 326; DO 8 x DC 24 V/2A PM
● SIL3/Cat.4/PLe can be achieved without safety protector (see chapter "Safety protector
(Page 297)")

Preface
Fail-safe signal modules
4 Installation and Operating Manual, 01/2010, A5E00085586-10
Approvals
The S7-300 system complies with the requirements and criteria of IEC 61131, Part 2. In
addition, CSA, UL, and FM approvals are available for S7-300.
The S7-300 fail-safe signal modules have also been certified for use in safety mode to:
● SIL3 (Safety Integrity Level) in accordance with IEC 61508
● Category 4 according to EN 954-1
● (PL) Performance Level e according to ISO 13849:2006
CE certifications
See chapter "Standards and Approvals (Page 59) ".
C-Tick-Mark for Australia
See chapter "Standards and Approvals (Page 59) ".
Standards
See chapter "Standards and Approvals (Page 59) ".

Preface
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10 5
Position in the IT environment
The additional references you require for working with fail-safe modules are listed below.
This manual contains corresponding cross-references to additional documentation.
Documentation Brief description of relevant contents
ET 200M Distributed I/O
Device Manual
Describes the ET 200M hardware (including the configuration,
assembly and wiring of IM 153 in combination with modules of the
S7-300 family)
Operating instructions S7-
300, CPU 31xC and CPU
31x: Installation
Describes the configuration, installation, wiring, addressing, and
commissioning of S7-300 systems
Reference manual
Automation Systems S7-300,
ET 200M
,
Ex I/O Modules
The SM 326; DI 8 × NAMUR is part of the SIMATIC S7 Ex digital
module family. It is to be used in compliance with installation
guidelines for SIMATIC S7-Ex digital modules.
The reference manual provides detailed guidelines for the
configuration of SIMATIC S7-Ex digital modules.
Manual Automation Systems
Principles of Explosion
Protection
Describes the basic principles of explosion protection
Safety Engineering in
SIMATIC S7 system
description
 Provides an overview of the use, configuration and functionality of
S7 Distributed Safety and S7 F/FH fail-safe automation systems
 Contains a summary of detailed technical information relating to
fail-safe engineering in S7-300 and S7-400 systems
 Includes information on the calculation of monitoring and
response times of S7 Distributed Safety and S7 F/FH fail-safe
systems
 The S7 F/FH Systems Configuring and Programming manual
describes the tasks required to create and commission an S7
F/FH System fail-safe system.
for integration in the S7 F/FH
fail-safe system
 The Automation System S7-400, M7-400, Hardware and
Installation
Manual describes the installation and wiring of S7-400
systems.
 The S7-400H Programmable Controllers, Fault-Tolerant Systems
manual describes the CPU 41x-H central modules and the tasks
required to set up and commission an S7-400H fault-tolerant
system.
 The
CFC for SIMATIC S7 manual/online help describe
programming with CFC.

Preface
Fail-safe signal modules
6 Installation and Operating Manual, 01/2010, A5E00085586-10
Documentation Brief description of relevant contents
The S7 Distributed Safety, Configuring and Programming manual
and online help describe:
 the configuration of fail-safe CPU and I/O
 how to program a fail-safe CPU in F-FBD or F-LAD
For integration in the F-
system S7 Distributed Safety
Documentation required, depending on the F-CPU used:
 The
S7-300, CPU 31xC and CPU 31x: Installation operating
instructions describe how to install and wire S7-300 systems.
 The CPU 31xC and CPU 31x, Technical Specifications manual
describes the CPUs 315-2 DP and PN/DP, the CPU 317-2 DP
and PN/DP, and the CPU 319-3 PN/DP.
 The
Automation System S7-400 Hardware and Installation
installation manual describes the installation and wiring of S7-400
systems.
 The
Automation System S7-400 CPU Specifications reference
manual describes the CPU 416-2 and the CPU 416-3 PN/DP.
 The ET 200S IM 151-7 CPU Interface Module manual describes
the IM 151-7 CPU.
 Every applicable F-CPU has its own Product Information. The
Product Information describes only the deviations from the
corresponding standard CPUs.
STEP 7 manuals  The
Configuring Hardware and Communication Connections with
STEP 7 V5.x
manual describes the operation of the relevant
standard tools of
STEP 7 .
 The
System and Standard Functions reference manual describes
functionality for access to/ diagnostics of distributed I/O.
STEP 7 online help  Describes the operation of
STEP 7 standard tools
 Contains information on the configuration and parameter
assignment of modules and intelligent slaves in HW Config
 Contains a description of the programming languages FBD and
LAD
PCS 7 manuals  Describe the handling of the
PCS 7 control system (required if
fail-safe I/O are implemented in a master control system)
The entire SIMATIC S7 documentation on CD-ROM is available on request.
Guide
This manual describes the S7-300 fail-safe modules and comprises both instructive and
reference chapters (technical data and annexes).
It contains essential information about the fail-safe signal modules:
● Installation and use
● Configuring and parameter assignment
● Addressing, installation and wiring
● Evaluating diagnostics data
● Technical data
● Order numbers

Preface
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10 7
Conventions
The terms "safety technology" and "fail-safe technology" are used synonymously in this
manual. The same applies to the use of the terms "fail-safe" and "F-". "F-SM" is a synonym
of "fail-safe signal module".
""
S7 Distributed Safety " and " S7 F Systems " in italic letters denote optional packages for the
fail-safe systems "S7 Distributed Safety" and "S7 F/FH Systems".
Recycling and disposal
The S7-300 can be recycled due to its low content of pollutants. Contact a company which is
certified for the disposal of electronic scrap for environment-friendly disposal and recycling of
your old device.
Additional support
Your local Siemens representative will be pleased to provide answers to any open issue
relating to the use of products described in this manual:
You will find information on who to contact on the Web
(http://www.siemens.com/automation/partner).
A guide to the technical documentation for the various SIMATIC products and systems is
available on the Web (http://www.siemens.de/simatic-tech-doku-portal).
You will find the online catalog and online ordering system on the Web
(http://mall.automation.siemens.com).
Training Centers
We offer courses to help you get started with the SIMATIC S7 automation system. Contact
your regional training center or the central training center in 90327 Nuremberg, Germany.
You will find more information on the Web (http://www.sitrain.com).
H/F Competence Center
The H/F Competence Center in Nuremberg offers special workshops on
SIMATIC S7 fail-
safe and fault-tolerant automation systems. The H/F Competence Center also provides
support in terms of on-site engineering, commissioning, and troubleshooting.
For questions about workshops, etc., contact: [e-mail]
Technical Support
To contact Technical Support for all Industry Automation products, use the Support Request
Web form (http://www.siemens.com/automation/support-request).
You can find additional information about our Technical Support on the Web
(http://www.siemens.com/automation/service).

Preface
Fail-safe signal modules
8 Installation and Operating Manual, 01/2010, A5E00085586-10
Service & Support on the Internet
In addition to our documentation, we also offer a comprehensive technical knowledge base
in the Internet (http://www.siemens.com/automation/service&support).
There you will find:
● the Newsletter which provides the latest information about your products
● The right documents; using our Service & Support search functions
● A forum where users and experts from all over the world exchange ideas
● Your local contact partner for Industry Automation products in our Contact Partners
database
● Information about on-site service, repairs, spare parts, and much more is available under
"Repairs, spare parts, and consulting".
Important information concerning the safe operation of your plant
Note
Plants with safety-oriented characteristics are subject to special requirements for operational
safety for which the operator is responsible. The supplier also undertakes to conform to
special measures for product monitoring. Siemens publishes a special newsletter to keep
plant operators informed about product developments and properties which may form
important issues in terms of operational safety. You should subscribe to the corresponding
newsletter in order to obtain the latest information and to allow you to modify your plant
accordingly. Please go to the Internet
(https://www.automation.siemens.com/WW/newsletter/guiThemes2Select.aspx?HTTPS=RE
DIR&subjectID=2) and register for the following newsletters:
 SIMATIC S7-300
 SIMATIC S7-400
 Distributed I/O
 SIMATIC Industrial Software
Activate the "News" check box to subscribe to the corresponding newsletter.

Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10 9
Table of contents
Preface ...................................................................................................................................................... 3
1 Product overview ..................................................................................................................................... 13
1.1 Introduction ..................................................................................................................................13
1.2 Using Fail-Safe Signal Modules...................................................................................................13
1.3 Guide to commissioning fail-safe signal modules........................................................................17
1.4 What is PROFINET IO? ...............................................................................................................18
2 Configuration options............................................................................................................................... 19
2.1 Introduction ..................................................................................................................................19
2.2 Configuration with F-SMs in Standard Mode...............................................................................20
2.3 Configuration with F-SMs in Safety Mode ...................................................................................21
3 Configuration and parameter assignment ................................................................................................ 25
3.1 Configuring...................................................................................................................................25
3.2 Parameter Assignment ................................................................................................................27
3.3 Firmware update via HW Config..................................................................................................28
3.4 I&M identification data..................................................................................................................30
4 Addressing and installation...................................................................................................................... 31
4.1 Address Assignments in the CPU................................................................................................31
4.2 Addressing the Channels.............................................................................................................33
4.3 Assigning the PROFIsafe address...............................................................................................34
4.3.1 Introduction ..................................................................................................................................34
4.3.2 Assigning PROFIsafe Address (Starting Address of F-SM) ........................................................35
4.3.3 Assigning PROFIsafe Address (F_destination_address).............................................................38
4.4 Installing.......................................................................................................................................41
5 Wiring ...................................................................................................................................................... 43
5.1 Safe Functional Extra-Low Voltage for Fail-Safe Signal Modules...............................................44
5.2 Wiring Fail-Safe Signal Modules..................................................................................................45
5.3 Replacing Fail-Safe Signal Modules............................................................................................46
5.4 Sensor and Actuator Requirements for F-SMs in Safety Mode...................................................47
6 Fault reaction and diagnostics ................................................................................................................. 51
6.1 Fault reactions of the F-SMs........................................................................................................51
6.1.1 Reactions to Faults in Standard Mode.........................................................................................51
6.1.2 Reactions to Faults in Safety Mode .............................................................................................52
6.1.3 Fault reactions in safety mode with parameter setting "Keep last valid value" ...........................55
6.2 Diagnosis of Faults of F-SMs.......................................................................................................56

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Fail-safe signal modules
10 Installation and Operating Manual, 01/2010, A5E00085586-10
7 General technical data............................................................................................................................. 59
7.1 Introduction ..................................................................................................................................59
7.2 Standards and Approvals.............................................................................................................59
7.3 Electromagnetic Compatibility......................................................................................................62
7.4 Shipping and storage conditions..................................................................................................68
7.5 Mechanical and Climatic Environmental Conditions....................................................................68
7.6 Specifications for Nominal Line Voltages, Isolation Tests, Protection Class, and Degree of
Protection.....................................................................................................................................70
8 Digital modules ........................................................................................................................................ 73
8.1 Introduction ..................................................................................................................................73
8.2 Discrepancy analysis at the fail-safe digital input modules .........................................................74
8.3 SM 326; DI 24 x DC 24V..............................................................................................................76
8.3.1 Properties, Front View, Connection Diagram, and Block Diagram..............................................76
8.3.2 Use cases for the SM 326; DI 24 24V DC ...................................................................................82
8.3.3 Application 1 : Standard Mode.....................................................................................................83
8.3.4 Application 2 : Standard operation with high availability..............................................................84
8.3.5 Application 3: Safety mode SIL2/Cat.3/PLd.................................................................................86
8.3.6 Application 4: Safety mode SIL2/Cat.3/PLd with high availability (in S7 F/FH Systems
only) .............................................................................................................................................88
8.3.7 Application 5: Safety mode SIL3/Cat.4/PLe.................................................................................90
8.3.8 Application 6: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH Systems
only) .............................................................................................................................................94
8.3.9 Diagnostic messages of SM 326; DI 24 x DC 24V ......................................................................99
8.3.10 Technical data - SM 326; DI 24 x DC 24V.................................................................................102
8.4 SM 326; DI 8 x NAMUR .............................................................................................................105
8.4.1 Properties, front view, wiring diagram and block diagram .........................................................105
8.4.2 Special Features when Wiring SM 326; DI 8 x NAMUR for Hazardous Areas..........................109
8.4.3 Cases of application of SM 326; DI x 8 NAMUR .......................................................................113
8.4.4 Application 1: standard mode and application 3: safety mode SIL 2 (Category 3)....................114
8.4.5 Application 2: standard mode with high availability and application 4: safety mode SIL 2
(Category 3) with high availability (only in S7 F/FH Systems)...................................................115
8.4.6 Application 5: Safety mode SIL3/Cat.4/PLe...............................................................................117
8.4.7 Application 6: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH Systems
only) ...........................................................................................................................................119
8.4.8 Diagnostic Messages for SM 326; DI 8 x NAMUR ....................................................................121
8.4.9 Technical data - SM 326; DI 8 x NAMUR ..................................................................................124
8.5 SM 326; DO 8 x DC 24V/2A PM................................................................................................127
8.5.1 Properties, front view, wiring diagram and block diagram .........................................................127
8.5.2 SM 326; DO 8 x DC 24V/2A PM applications............................................................................130
8.5.3 Application 1: Safety Mode SIL2/Cat.3/PLd and application 2: Safety mode
SIL3/Cat.4/PLe...........................................................................................................................131
8.5.4 Diagnostic messages of SM 326; DO 8 x DC 24V/2A PM ........................................................133
8.5.5 Technical data - SM 326; DO 8 x DC 24V/2A PM .....................................................................138
8.6 SM 326; DO 10 x DC 24V/2A (6ES7326-2BF01-0AB0) ............................................................141
8.6.1 Properties, front view, wiring diagram and block diagram .........................................................141
8.6.2 SM 326; DO 10 x DC 24V/2A applications ................................................................................145
8.6.3 Application 1: Standard mode, application 3: Safety Mode SIL2/Cat.3/PLd and
application 5: Safety mode SIL3/Cat.4/PLe...............................................................................146

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Installation and Operating Manual, 01/2010, A5E00085586-10 11
8.6.4 Application 2: standard mode with high availability, application 4: Safety Mode
SIL2/Cat.3/PLd with high availability and application 6: Safety mode SIL3/Cat.4/PLe with
high availability (in S7 F/FH Systems only) ...............................................................................149
8.6.5 Parallel Connection of Two Outputs for Dark Period Suppression............................................151
8.6.6 Diagnostics messages of SM 326; DO 10 x DC 24V/2A ...........................................................152
8.6.7 Technical Data - SM 326; DO 10 x DC 24V/2A.........................................................................157
8.7 SM 326; F-DO 10 x DC 24V/2A PP (6ES7326-2BF10-0AB0)...................................................161
8.7.1 Properties, front view, wiring diagram and block diagram .........................................................161
8.7.2 SM 326; F-DO 10 x DC 24V/2A PP applications.......................................................................165
8.7.3 Applications 1 to 4......................................................................................................................166
8.7.4 Application 5: Safety mode SIL3/Cat.4/PLe...............................................................................167
8.7.5 Application 5.1: Wiring two outputs in parallel for dark period suppression ..............................169
8.7.6 Application 6: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH Systems
only) ...........................................................................................................................................171
8.7.7 Diagnostic messages SM 326; F-DO 10 x DC 24V/2A PP........................................................173
8.7.8 Technical data - SM 326; F-DO 10 x DC 24V/2A PP ................................................................178
9 Analog modules..................................................................................................................................... 181
9.1 Introduction ................................................................................................................................181
9.2 SM 336; AI 6 x 13 Bit .................................................................................................................182
9.2.1 Analog value representation ......................................................................................................182
9.2.2 Properties, front view, wiring diagram and block diagram .........................................................184
9.2.3 Applications of SM 336; AI 6 x 13 Bit.........................................................................................190
9.2.4 Application 1 : Standard Mode...................................................................................................191
9.2.5 Application 2: standard mode with high availability ...................................................................195
9.2.6 Application 3: Safety mode SIL2/Cat.3/PLd...............................................................................199
9.2.7 Application 4: Safety mode SIL2/Cat.3/PLd with high availability (in S7 F/FH Systems
only) ...........................................................................................................................................202
9.2.8 Application 5: Safety mode SIL3/Cat.4/PLe...............................................................................206
9.2.9 Application 6: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH Systems
only) ...........................................................................................................................................210
9.2.10 Diagnostic Messages for SM 336; AI 6 x 13 Bit.........................................................................215
9.2.11 Technical data - SM 336; AI 6 x 13Bit .......................................................................................218
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART........................................................................................222
9.3.1 Analog value representation ......................................................................................................222
9.3.2 Properties, front view, wiring diagram and block diagram .........................................................224
9.3.3 Applications of SM 336; F-AI 6 x 0/4 ... 20 mA HART ...............................................................229
9.3.4 Applications and wiring schemes...............................................................................................239
9.3.4.1 Calculation of the residual supply voltage at the transducer .....................................................239
9.3.5 Applications 1 and 2...................................................................................................................241
9.3.6 Application 3: Safety mode SIL3/Cat.3/PLe...............................................................................241
9.3.7 Application 4: Safety mode SIL3/Cat.3/PLe with high availability (in S7 F/FH Systems
only) ...........................................................................................................................................243
9.3.8 Application 5: Safety mode SIL3/Cat.4/PLe...............................................................................246
9.3.9 Application 6: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH Systems
only) ...........................................................................................................................................249
9.3.10 Application 7: Safety mode SIL3/Cat.4/PLe...............................................................................252
9.3.11 Application 8: Safety mode SIL3/Cat.4/PLe with high availability (in S7 F/FH Systems
only) ...........................................................................................................................................254
9.3.12 Application 9: Safety mode SIL3/Cat.4/PLe with three modules and high availability (in S7
F/FH Systems only) ...................................................................................................................256
9.3.13 Diagnostic messages of SM 336; F-AI 6 x 0/4 ... 20 mA HART ................................................257
9.3.14 Technical Data - SM 336; F-AI 6 x 0/4 ... 20 mA HART ............................................................263
9.3.15 Parameters of analog input module F-AI 6 x 0/4 ... 20mA HART..............................................268

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12 Installation and Operating Manual, 01/2010, A5E00085586-10
9.3.15.1 Setting smoothing of analog values...........................................................................................269
9.3.15.2 Parameter assignment of discrepancy analysis for 1oo2 evaluation.........................................271
9.3.15.3 Deactivate one channel of a channel pair for 1oo1 evaluation..................................................278
9.3.16 HART basics ..............................................................................................................................278
9.3.16.1 What is HART? ..........................................................................................................................278
9.3.16.2 Properties of HART....................................................................................................................278
9.3.16.3 Principles of HART operation.....................................................................................................279
9.3.16.4 Integration of the HART field devices ........................................................................................281
9.3.16.5 Using HART ...............................................................................................................................282
9.3.16.6 HART for safety-oriented applications .......................................................................................283
9.3.17 Data record interface and user data ..........................................................................................287
9.3.17.1 Overview of the data record interface and user data of the HART communication ..................287
9.3.17.2 Diagnostic data records .............................................................................................................288
9.3.17.3 HART communication records...................................................................................................289
9.3.17.4 Parameter records of the HART channels.................................................................................294
9.3.17.5 User data interface, input range (reading).................................................................................295
10 Safety protector ..................................................................................................................................... 297
10.1 Introduction ................................................................................................................................297
10.2 Properties, Front View, and Block Diagram...............................................................................297
10.3 Configuration Variants ...............................................................................................................299
10.4 Technical Specifications ............................................................................................................302
A Diagnostics data of the signal modules.................................................................................................. 303
A.1 Introduction ................................................................................................................................303
A.2 Structure and Content of Diagnostic Data .................................................................................303
B Dimensional drawings............................................................................................................................ 315
B.1 Signal Module ............................................................................................................................315
B.2 Safety protector..........................................................................................................................317
C Accessories and order numbers ............................................................................................................ 319
C.1 Accessories and Order Numbers...............................................................................................319
D Response times..................................................................................................................................... 321
D.1 Response Times ........................................................................................................................321
E Switching capacitive and inductive loads............................................................................................... 327
Glossary ................................................................................................................................................ 331
Index...................................................................................................................................................... 345

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Installation and Operating Manual, 01/2010, A5E00085586-10 13
Product overview 1
1.1 Introduction
In this chapter
The product overview provides information about
● the integration of fail-safe signal modules in SIMATIC S7 fail-safe automation systems
● available fail-safe signal modules
● steps to take, starting with the selection and ending with the commissioning of fail-safe
modules.
1.2 Using Fail-Safe Signal Modules
Fail-safe automation system
Fail-safe automation systems (F-systems) are used in plants which are subject to more
stringent safety standards. F-systems are used to control processes and to force the plant
into a safe state after shutdown. That is, F-systems control processes which do not pose a
risk to human beings or to the environment when shut down immediately.
Fail-safe signal modules
Compared to standard modules of the S7-300 module family, the fail-safe signal modules
differ in terms of their internal dual-channel structure. The two integrated processors monitor
each other, automatically test the I/O circuits, and force the fail-safe signal module into safe
state when a fault/error has been detected. The F-CPU communicates with the fail-safe
signal module by means of the safety-oriented PROFIsafe bus profile.

Product overview
1.2 Using Fail-Safe Signal Modules
Fail-safe signal modules
14 Installation and Operating Manual, 01/2010, A5E00085586-10
Types of fail-safe signal modules
Fail-safe signal modules (short name: F-SM) available:
Table 1- 1 Types of fail-safe signal modules
Fail-safe signal modules Capable of redundancy
SM 326; DI 24 x DC 24V Yes
SM 326; DI 8 x NAMUR Yes
SM 326; DO 8 x DC 24V/2A PM No
SM 326; DO 10 x DC 24V/2A Yes
SM 326; F-DO 10 x DC 24V/2A PP Yes
SM 336; AI 6 x 13 Bit Yes
SM 336; F-AI 6 x 0/4 ... 20 mA HART Yes
Interface modules that support operation with fail-safe signal modules
The table below lists the interface modules which support operation with fail-safe signal
modules:
Table 1- 2 Supported interface modules
Interface module Order number
IM 153-2 6ES7153-2AA02. and higher (as of product version 05, firmware V1.1.0)
IM 153-2 FO 6ES7153-2AB01. and higher (as of product version 04, firmware V1.1.0)
IM 153-2/IM 153-2 FO 6ES7153-2BA0./-2BB0.
The SM 336; F-AI 6 x 0/4 ... 20 mA HART can be operated with the following inteface
modules:
Table 1- 3 Supported interface modules for SM 336; F-AI 6 x 0/4 ... 20 mA HART
Interface module Order number
IM 153-2/IM 153-2 FO 6ES7153-2BA0./-2BB0.
The SM326; F-DO 10 x DC24V/2A PP can be used for fail-safe I-Slave-Slave
communication (in F-System S7 Distributed Safety) with the following inteface modules only:
Interface module Order number
IM 153-2 6ES7153-2BA02. (as of firmware version V5.0.13)

Product overview
1.2 Using Fail-Safe Signal Modules
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10 15
Optional applications for fail-safe signal modules
S7-300 fail-safe signal modules support applications for:
● S7-300 automation systems (centrally in S7-300; distributed in ET 200M)
● S7-400 automation systems (distributed in ET 200M)
Note
To use the HART function of the SM 336, F-AI 6 x 0/4 ... 20 mA HART analog module
requires distributed implementation in ET 200M.
F-System with fail-safe signal modules
The figure below shows an example configuration of an S7 Distributed Safety F-system with
fail-safe signal modules/modules in S7-300, ET 200M, and ET 200S.
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(70
(76
352),%86'3
352),1(7,2
)DLOVDIH
6LJQDOPRGXOHV
)DLOVDIH
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)DLOVDIH
0RGXOHV
Figure 1-1 Fail-safe S7 Distributed Safety automation system
Operation in standard mode
Except for the SM 326; DO 8 x DC 24V/2A PM, the SM 326; F-DO 10 x DC 24V/2A PP and
the SM 336; F-AI 6 x 0/4 ... 20 mA HART, you can operate all other fail-safe signal modules
in standard mode with more stringent diagnostics requirements. When operated in standard
mode, the fail-safe signal modules respond similar to standard S7-300 I/O modules.
Operation in safety mode
You can implement the fail-safe signal modules for operation in safety mode. Configure
safety mode in
HW Config of STEP 7 and using the address selector switch on the rear
panel of the fail-safe signal module. The "SAFE" LED is lit when safety mode is active at the
signal module.

Product overview
1.2 Using Fail-Safe Signal Modules
Fail-safe signal modules
16 Installation and Operating Manual, 01/2010, A5E00085586-10
Operation in safety mode with parameter setting "Keep last valid value" with digital output modules
You can only operate the SM 326; F-DO 10 x DC 24V/2A PP with parameter setting "Keep
last valid value" according to EN54-2/-4 or NFPA72. Configure safety mode in
HW Config of
STEP 7 and using the address selector switch on the rear panel of the fail-safe signal
module. The "SAFE" LED is lit when safety mode is active at the signal module.
For more information, refer to the chapter entitled " Reactions to Faults in Safety Mode
(Page 52) " and " Fault reactions in safety mode with parameter setting "Keep last valid
value" (Page 55) ".
Safety Integrity Levels supported
The fail-safe signal modules feature integrated safety functions for operation in safety mode.
The section below outlines the Safety Integrity Levels that can be achieved in safety mode
through assignment of the safety function parameters in
STEP 7 using the optional package
S7 Distributed Safety or S7 F Systems , and by specific arrangement and wiring of the
sensors and actuators:
Table 1- 4 Safety Integrity Levels that can be achieved in safety mode
Safety Integrity Level in safety mode *
According to IEC 61508 According to EN 954-1 According to
ISO 13849:2006
SIL 2 Category 3 (PL) Performance Level d
SIL 3 Category 4 (PL) Performance Level e
* Valid only if "Keep last valid value" was not set with parameters in digital output modules.
Enhanced availability in standard and safety mode
You can enhance availability by means of redundant operation of the F-SMs fail-safe signal
modules in
standard mode (exception: SM 326; DO 8 x DC 24V/2A PM, SM 326; F-
DO 10 x DC 24V/2A PP and SM 336; F-AI 6 x 0/4 ... 20 mA HART).
In safety mode , you can operate the F-SMs redundantly in S7 F/FH Systems F-systems
(with the exception of SM 326; DO 8 x DC 24V/ 2A PM).
Options of inserting redundant signal modules, depending on availability requirements (for
example configurations, refer to "Safety Engineering in SIMATIC S7, System Description
(http://support.automation.siemens.com/WW/view/en/37231510)"):
● Separately in two ET 200M distributed I/O devices
● In the same ET 200M distributed I/O device
Software requirements of redundant operation of F-SMs are described in the chapter
"Configuration and parameter assignment (Page 25)".

Product overview
1.3 Guide to commissioning fail-safe signal modules
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10 17
1.3 Guide to commissioning fail-safe signal modules
Introduction
The table below lists all important tasks related to the commissioning of fail-safe signal
modules in S7-300 or ET 200M.
Commissioning sequence, starting with the selection of the F-SMs
Table 1- 5 Commissioning sequence, starting with the selection of the F-SMs
Step Procedure See
1. Selecting the F-SMs to be installed Product catalog;
chapter
Digital modules;
chapter Analog module
2. Setup of the mode of operation (standard or safety mode),
configuration and parameterization of the F-SM
Chapter Configuring and
parameter assignment;
chapter Addressing and
installing
3. Installing F-SMs Chapter Addressing and
installing
4. Wiring the F-SMs Chapter Wiring
5. Commissioning of the F-SMs ET 200M Distributed I/O
Device manual, or S7-300,
CPU 31xC and CPU 31x
Operating Manual
Installation
6. Run diagnostics if commissioning was not successfully
completed.
Chapter Fault reactions and
diagnostics;
Chapter
Digital Module;
Chapter Analog Module

Product overview
1.4 What is PROFINET IO?
Fail-safe signal modules
18 Installation and Operating Manual, 01/2010, A5E00085586-10
1.4 What is PROFINET IO?
Definition
PROFINET IO is an open transmission system with real-time functionality defined in
accordance with the PROFINET standard. This standard defines a manufacturer-
independent communication, automation and engineering model.
Accessories for wiring the PROFINET components are available in industrial quality.
● PROFINET discards the hierarchical PROFIBUS master/slave concept and deploys a
provider/consumer principle instead. The modules of an I/O device that will be subscribed
to by an IO controller are defined within the engineering phase.
● The quantity framework is extended in accordance with the options offered on
PROFINET IO. Parameter limits are not exceeded during configuration.
● The transmission rate is 100 Mbps.
● The configuration interface for users is generally the same as that on PROFIBUS DP (the
system is configured with
HW Config ).
Additional information on PROFINET IO is available in the PROFINET system description
(http://support.automation.siemens.com/WW/view/en/19292127).
Topology of a PROFINET IO network
The figure below shows a typical PROFINET IO network topology. Existing PROFIBUS
slaves can be integrated using an IE/PB link.
(70 3*3&
IO-Controller
S7-300 IO-DeviceIO-Device
IO-Device ET 200pro
PROFINET IO
(Industrial
Ethernet)
Switch Switch SwitchSwitch
IE/PB-
Link
PROFIBUS DP
ET 200S OP 25
max. 100 m
Figure 1-2 Typical structure of a PROFINET IO network

Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10 19
Configuration options 2
2.1 Introduction
In this chapter
This chapter contains information about:
● Central and distributed configuration with F-SMs
● Components which can be used for F-SMs in standard mode
● Components which can be used for F-SMs in safety mode
● Options of combining F-SMs and standard modules in the same configuration
Central and distributed configuration
All fail-safe signal modules support operation in standard and safety mode in a central S7-
300 system and in a distributed system with ET 200M distributed I/O devices.
Note
To use the HART function of the SM 336, F-AI 6 x 0/4 ... 20 mA HART analog module
requires distributed implementation in ET 200M.

Configuration options
2.2 Configuration with F-SMs in Standard Mode
Fail-safe signal modules
20 Installation and Operating Manual, 01/2010, A5E00085586-10
2.2 Configuration with F-SMs in Standard Mode
Configuration variants in standard mode
When operated in standard mode, the fail-safe signal modules respond similar to standard
S7-300 I/O modules (abbreviated: standard modules). The configuration variants are similar
to the variants of an S7-300 or ET 200M with standard modules.
Exception: The SM 336 F-AI 6 x 0/4 ... 20 mA HART, SM 326; F-DO 10 x DC 24V/2A PP
and SM 326; DO 8 x DC 24V/2A PM operate in safety mode only.
CPUs approved for use in S7-300 systems (central configuration)
All CPUs of the S7-300 family can be implemented in a central configuration when operating
the fail-safe signal modules in standard mode.
Approved IM 153 in ET 200M (distributed configuration)
All IM 153-2/-2 FO interfaces of the ET 200M distributed I/O device can be used when
operating the fail-safe signal modules in standard mode.
Combinations of fail-safe and standard modules supported for operation in standard mode
S7-300/ET 200M support the combined operation of fail-safe signal modules and standard
modules in standard mode.
Additional information
For detailed information on S7-300 configuration variants, refer to the S7-300, CPU 31xC
and CPU 31x: Installation
manual.
For detailed information on the configuration of ET 200M, refer to the
ET 200M Distributed
I/O Device
manual.
For detailed information on implementing fail-safe signal modules as redundant I/O in S7 FH
systems, refer to the
S7-400H Automation Systems; Fault-Tolerant Systems manual.