EN IEC 61139-2:2022

SLOVENSKI STANDARD
01-december-2022
Industrijska omrežja - Enožični digitalni komunikacijski vmesnik - 2. del:
Funkcijsko varni podaljški (IEC 61139-2:2022)
Industrial networks - Single-drop digital communication interface - Part 2: Functional
safety extensions (IEC 61139-2:2022)
Industrielle Netzwerke - Digitale Single-Drop-Kommunikationsschnittstelle - Teil 2:
Erweiterungen für die funktionale Sicherheit (IEC 61139-2:2022)
Réseaux industriels - Interface de communication numérique point à point - Partie 2:
Extensions de sécurité fonctionnelle (IEC 61139-2:2022)
Ta slovenski standard je istoveten z: EN IEC 61139-2:2022
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61139-2

NORME EUROPÉENNE
EUROPÄISCHE NORM September 2022
ICS 25.040
English Version
Industrial networks - Single-drop digital communication interface
- Part 2: Functional safety extensions
(IEC 61139-2:2022)
Réseaux industriels - Interface de communication Industrielle Netzwerke - Digitale Single-Drop-
numérique point à point - Partie 2: Extensions de sécurité Kommunikationsschnittstelle - Teil 2: Erweiterungen für die
fonctionnelle funktionale Sicherheit
(IEC 61139-2:2022) (IEC 61139-2:2022)
This European Standard was approved by CENELEC on 2022-09-23. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61139-2:2022 E

European foreword
The text of document 65C/1168/FDIS, future edition 1 of IEC 61139-2, prepared by SC 65C "Industrial
networks" of IEC/TC 65 "Industrial-process measurement, control and automation" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61139-2:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-06-23
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-09-23
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61139-2:2022 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 61784-3 (series) NOTE Harmonized as EN IEC 61784-3 (series)
IEC 60947-5-2 NOTE Harmonized as EN IEC 60947-5-2
IEC 62769 (series) NOTE Harmonized as EN IEC 62769 (series)
IEC 60947-5-6 NOTE Harmonized as EN 60947-5-6
IEC 62453 (series) NOTE Harmonized as EN 62453 (series)
IEC 60947-5-3 NOTE Harmonized as EN 60947-5-3
IEC 61076-2-113 NOTE Harmonized as EN 61076-2-113
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60204-1 - Safety of machinery - Electrical equipment EN 60204-1 -
of machines - Part 1: General requirements
IEC 61010-2-201 - Safety requirements for electrical EN IEC 61010-2-201 -
equipment for measurement, control, and
laboratory use - Part 2-201: Particular
requirements for control equipment
IEC 61131-2 - Industrial-process measurement and - -
control - Programmable controllers - Part 2:
Equipment requirements and tests
IEC 61131-9 2022 Programmable controllers - Part 9: Single- EN IEC 61131-9 2022
drop digital communication interface for
small sensors and actuators (SDCI)
IEC 61496-1 - Safety of machinery - Electro-sensitive EN IEC 61496-1 -
protective equipment - Part 1: General
requirements and tests
IEC 61508-3 - Functional safety of EN 61508-3 -
electrical/electronic/programmable
electronic safety-related systems - Part 3:
Software requirements
IEC 61784-3 2021 Industrial communication networks - EN IEC 61784-3 2021
Profiles - Part 3: Functional safety
fieldbuses - General rules and profile
definitions
IEC 62061 - Safety of machinery - Functional safety of EN IEC 62061 -
safety-related control systems
IEC 62443 series Security for industrial automation and EN IEC 62443 series
control systems
ISO 639-2 - Codes for the representation of names of - -
languages - Part-2: Alpha-3 code
ISO 639-3 - Codes for the representation of names of - -
languages - Part 3: Alpha-3 code for
comprehensive coverage of languages
ISO 13849-1 - Safety of machinery - Safety-related parts EN ISO 13849-1 -
of control systems - Part 1: General
principles for design
IEC 61139-2 ®
Edition 1.0 2022-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial networks – Single-drop digital communication interface –

Part 2: Functional safety extensions

Réseaux industriels – Interface de communication numérique point à point –

Partie 2: Extensions de sécurité fonctionnelle

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040 ISBN 978-2-8322-3946-9

– 2 – IEC 61139-2:2022 © IEC 2022
CONTENTS
FOREWORD . 12
INTRODUCTION . 14
1 Scope . 17
2 Normative references . 17
3 Terms, definitions, symbols, abbreviated terms, and conventions . 18
3.1 Terms and definitions . 18
3.2 Common terms and definitions . 18
3.3 Terms and definitions related to SDCI-FS . 21
3.4 Symbols and abbreviated terms . 23
3.5 Conventions . 24
3.5.1 Behavioral descriptions . 24
3.5.2 Memory and transmission octet order . 25
4 Overview of SDCI-FS . 25
4.1 Purpose of the technology and feature levels . 25
4.1.1 Base SDCI-FS technology . 25
4.1.2 From "analog" and "switching" to communication . 26
4.1.3 Minimized paradigm shift from FS-DI to FS-Master . 27
4.1.4 Following the SDCI paradigm (SIO vs. OSSDe) . 28
4.1.5 Port class B . 30
4.1.6 "USB-Master" with safety parameterization . 31
4.1.7 Interoperability matrix of safety devices . 31
4.2 Positioning within the automation hierarchy . 32
4.3 Wiring, connectors, and power supply . 33
4.4 Relationship to SDCI . 33
4.5 Communication features and interfaces . 34
4.6 Parameterization . 34
4.7 Role of FS-Master and FS-Gateway . 35
4.8 Mapping to upper-level systems . 35
4.9 Structure of the document . 35
5 Extensions to the Physical Layer (PL) . 35
5.1 Overview. 35
5.2 Extensions to PL services . 36
5.2.1 PL_SetMode . 36
5.2.2 PL_Ready . 36
5.3 Transmitter/receiver . 37
5.3.1 Assumptions for the expansion to OSSDe . 37
5.3.2 OSSDe specifics . 37
5.3.3 Start-up of an FS-Device (Ready pulse) . 40
5.3.4 Electric characteristics of a receiver in FS-Device and FS-Master . 41
5.4 Electric and dynamic characteristics of an FS-Device . 41
5.5 Electric and dynamic characteristics of an FS-Master port (OSSDe) . 44
5.6 FS-Master port FS-DI interface . 45
5.7 Wake-up coordination . 45
5.8 Fast start-up . 46
5.9 Power supply . 46
5.10 Medium . 47

IEC 61139-2:2022 © IEC 2022 – 3 –
5.10.1 Constraints . 47
5.10.2 Connectors . 47
5.10.3 Cable characteristics . 47
6 Extensions to SIO . 47
7 Extensions to the data link layer (DL) . 47
7.1 Overview. 47
7.2 State machine of the FS-Master DL-mode handler . 47
7.3 State machine of the FS-Device DL-mode handler . 49
8 Extensions to the Master Configuration Manager (CM) . 51
9 Extensions of the FS-Device . 52
9.1 Principle architecture and models . 52
9.1.1 FS-Device architecture . 52
9.1.2 FS-Device model . 53
9.2 Parameter Manager (PM) . 54
9.3 Process Data Exchange (PDE) . 54
9.4 Data Storage (DS) . 54
9.4.1 General considerations and extensions including safety . 54
9.4.2 Backup levels . 55
10 Extensions of the FS-Master . 55
10.1 Principle architecture . 55
10.2 SMI service extensions . 56
10.2.1 Overview . 56
10.2.2 SMI_FSMasterAccess . 58
10.2.3 SMI_SPDUIn . 60
10.2.4 SMI_SPDUOut . 60
10.2.5 SMI_FSPDInOut . 60
10.3 ArgBlock extensions . 62
10.3.1 Overview . 62
10.3.2 FSMasterAccess . 62
10.3.3 FSCPAuthenticity . 63
10.3.4 FSPortConfigList . 63
10.3.5 FSPortStatusList. 66
10.3.6 SPDUIn . 67
10.3.7 SPDUOut . 67
10.3.8 FSPDInOut . 68
10.4 Safety Layer Manager (SLM) . 69
10.4.1 Purpose . 69
10.4.2 FS_PortModes . 69
10.4.3 FSP parameter . 69
10.5 Process Data Exchange (PDE) . 73
10.6 Data Storage (DS) . 74
11 Safety communication layer (SCL) . 74
11.1 Functional requirements . 74
11.2 Communication errors and safety measures . 74
11.3 SCL services . 75
11.3.1 Positioning of safety communication layers (SCL) . 75
11.3.2 FS-Master SCL services . 76
11.3.3 FS-Device SCL services . 77

– 4 – IEC 61139-2:2022 © IEC 2022
11.4 SCL protocol . 79
11.4.1 Protocol phases to consider . 79
11.4.2 FS-Device faults . 80
11.4.3 Safety PDU (SPDU) . 80
11.4.4 FS-Input and FS-Output data . 81
11.4.5 Port number . 81
11.4.6 Status and control . 81
11.4.7 CRC signature . 82
11.4.8 TADI safety considerations (informative) . 83
11.4.9 Data types for SDCI-FS . 84
11.5 SCL behavior . 85
11.5.1 General . 85
11.5.2 SCL state machine of the FS-Master . 85
11.5.3 SCL state machine of the FS-Device . 88
11.5.4 Sequence charts for several use cases . 91
11.5.5 Monitoring of safety times . 98
11.5.6 Reaction in the event of a malfunction . 99
11.5.7 Start-up (communication) . 101
11.6 SCL management . 101
11.6.1 Parameter overview (FSP and FST) . 101
11.6.2 Parameterization approaches . 103
11.7 Integrity measures . 104
11.7.1 IODD integrity . 104
11.7.2 Tool integrity . 104
11.7.3 Transmission integrity . 104
11.7.4 Verification record . 104
11.7.5 Authentication. 105
11.7.6 Storage integrity . 105
11.7.7 FS I/O data structure integrity . 106
11.7.8 Technology parameter (FST) based on IODD . 106
11.7.9 Technology parameter (FST) based on existing Dedicated Tool (IOPD) . 107
11.8 Creation of FSP and FST parameters . 108
11.9 Integration of Dedicated Tools (IOPD) . 109
11.9.1 IOPD interface . 109
11.9.2 Standard interfaces . 109
11.9.3 Backward channel . 110
11.10 Validation . 111
11.11 Passivation . 111
11.11.1 Motivation and means . 111
11.11.2 Port selective (FS-Master) . 111
11.11.3 Signal selective (FS-Terminal) . 112
11.11.4 Qualifier settings in case of communication . 112
11.11.5 Qualifier handling in case of OSSDe . 112
11.12 SCL diagnosis . 113
12 Functional safe processing (FS-P) . 114
12.1 Recommendations for efficient I/O mappings . 114
12.2 Embedded FS controller. 114
Annex A (normative) Extensions to parameters . 115
A.1 Indices and parameters for SDCI-FS . 115

IEC 61139-2:2022 © IEC 2022 – 5 –
A.2 Parameters in detail . 116
A.2.1 FSP_Authenticity . 116
A.2.2 FSP_Port . 116
A.2.3 FSP_AuthentCRC . 117
A.2.4 FSP_ProtVersion . 117
A.2.5 FSP_ProtMode . 117
A.2.6 FSP_Watchdog . 117
A.2.7 FSP_IO_StructCRC . 118
A.2.8 FSP_TechParCRC . 119
A.2.9 FSP_ProtParCRC . 119
A.2.10 FSP_VerifyRecord . 119
A.2.11 FSP_TimeToReady . 119
A.2.12 FSP_MinShutDownTime . 120
A.2.13 FSP_WCDT . 120
A.2.14 FSP_OFDT . 120
A.2.15 FSP_ParamDescCRC . 120
Annex B (normative) Extensions to EventCodes . 121
B.1 Additional FS-Device EventCodes . 121
B.2 Additional Port EventCodes . 121
Annex C (normative) Extensions to Data Types . 123
C.1 Data types for SDCI-FS . 123
C.2 BooleanT (bit) . 123
C.3 IntegerT (16) . 124
C.4 IntegerT (32) . 124
C.5 Safety Code . 125
Annex D (normative) CRC generator polynomials . 126
D.1 Overview of CRC generator polynomials . 126
D.2 Residual error probabilities . 126
D.3 Implementation considerations . 128
D.3.1 Overview . 128
D.3.2 Bit shift algorithm (16 bit) . 128
D.3.3 Lookup table (16 bit) . 128
D.3.4 Bit shift algorithm (32 bit) . 130
D.3.5 Lookup table (32 bit) . 130
D.3.6 Seed values . 131
D.3.7 Octet order for CRC calculation . 132
Annex E (normative) IODD extensions . 133
E.1 General . 133
E.2 Schema . 133
E.3 IODD constraints . 133
E.3.1 General rules . 133
E.3.2 Description of the IODD structure . 133
E.3.3 Behavior of "Reset" SystemCommands in SDCI-FS . 140
E.3.4 Profile Characteristic . 141
E.3.5 ProcessDataInput and ProcessDataOutput . 141
E.4 IODD conventions . 141
E.4.1 Naming . 141
E.4.2 Process Data (PD) . 141

– 6 – IEC 61139-2:2022 © IEC 2022
E.4.3 IODD conventions for user interface . 142
E.4.4 Master Tool features . 142
E.5 Securing . 142
E.5.1 General . 142
E.5.2 DefaultValues for FSP . 143
E.5.3 FSP_Authenticity . 143
E.5.4 FSP_Protocol . 143
E.5.5 FSP_IO_Description . 144
E.5.6 Sample serialization for FSP_ParamDescCRC . 144
E.5.7 FST and FSP parameters and Data Storage . 145
E.5.8 Sample IODD of an FS-Device . 145
Annex F (normative) Device Tool Interface (DTI) for SDCI . 156
F.1 Purpose of DTI . 156
F.2 Base model . 156
F.3 Invocation interface . 157
F.3.1 Overview . 157
F.3.2 Detection of Device Tool . 158
F.3.3 Program Interface Description – PID . 161
F.3.4 Temporary Parameter File – TPF . 164
F.3.5 Temporary Backchannel File – TBF . 169
F.3.6 Temporary Acknowledgment File – TAF . 171
F.3.7 Invocation behavior . 171
F.4 Device data objects (DDO) . 172
F.4.1 General . 172
F.4.2 Structure of DDO package . 173
F.5 Communication Interface . 173
F.5.1 General . 173
F.5.2 Principle of DTI communications . 174
F.5.3 Gateways . 175
F.5.4 Configuration of the Communication Server . 175
F.5.5 Definition of the Communication Interface . 176
F.5.6 Sequence for establishing a communication relation . 176
F.5.7 Usage of the Communication Server in stand-alone mode . 177
F.5.8 SDCI specifics . 178
F.5.9 Changing communication settings . 178
F.6 Reaction on incorrect Tool behavior . 179
F.7 Compatibility . 179
F.7.1 Schema validation . 179
F.7.2 Version policy . 180
F.8 Scalability . 180
F.8.1 Scalability of a Device Tool . 180
F.8.2 Scalability of a Master Tool . 181
F.8.3 Interactions at conformance class combinations . 181
F.9 Schema definitions. 181
F.9.1 General . 181
F.9.2 Schema of the PID . 181
F.9.3 Schema of the TPF . 183
F.9.4 Schema of the TBF . 185
F.9.5 Schema of the TAF . 186

IEC 61139-2:2022 © IEC 2022 – 7 –
F.9.6 Schema of DTI primitives . 187
Annex G (normative) Main scenarios of SDCI-FS . 189
G.1 Overview. 189
G.2 Sequence chart of commissioning . 190
G.3 Sequence chart of replacement . 191
G.4 Sequence chart of misconnection. 192
Annex H (normative) System requirements . 193
H.1 Indicators . 193
H.1.1 General . 193
H.1.2 OSSDe . 193
H.1.3 Safety communication. 193
H.1.4 Acknowledgment request . 193
H.2 Installation guidelines, electrical safety, and security . 193
H.3 Safety function response time . 194
H.4 Duration of demands . 194
H.5 Maintenance and repair . 194
H.6 Safety manual . 194
Annex I (informative) Information for test and assessment of SDCI-FS components . 195
Bibliography . 196

Figure 1 – Positioning of SDCI-FS in functional safety automation . 14
Figure 2 – Relationship of this document to standards . 16
Figure 3 – Memory and transmission octet order . 25
Figure 4 – SDCI-FS communication layer model . 25
Figure 5 – Port interface extensions for SDCI-FS . 26
Figure 6 – Migration to SDCI-FS . 27
Figure 7 – Minimized paradigm shift from FS-DI to FS-Master. 28
Figure 8 – FS-Master types and feature levels . 28
Figure 9 – Original pin layout of SDCI (port class A) . 29
Figure 10 – Optimized OSSDe commissioning with FS-Master . 30
Figure 11 – Level "d" of an FS-Master (Class B) . 31
Figure 12 – Off-site configuration and parameterization . 31
Figure 13 – SDCI-FS within the automation hierarchy . 33
Figure 14 – The SDCI physical layer of an FS-Master (class A) . 36
Figure 15 – The physical layer of an FS-Device (class A) . 36
Figure 16 – Cross compatibility OSSD and OSSDe . 37
Figure 17 – Principle OSSDe function . 38
Figure 18 – Test pulses to detect cross connection faults . 39
Figure 19 – OSSD timings. 40
Figure 20 – Typical start-up of an OSSD sensor . 40
Figure 21 – Start-up of an FS-Device . 40
Figure 22 – Switching thresholds for FS-Device and FS-Master receivers . 41
Figure 23 – Reference schematics (one OSSDe channel) . 42
Figure 24 – Voltage level definitions . 42
Figure 25 – Charge capability at power-up . 45

– 8 – IEC 61139-2:2022 © IEC 2022
Figure 26 – OSSDe input filter conflict resolution . 45
Figure 27 – Start-up of an FS-Device . 46
Figure 28 – Required fast start-up timings . 46
Figure 29 – State machine of the FS-Master DL-mode handler . 48
Figure 30 – State machine of the FS-Device DL-mode handler . 50
Figure 31 – Extension to the Configuration Manager (VerifyRecord) . 51
Figure 32 – Principle architecture of the FS-Device . 53
Figure 33 – The FS-Device model . 54
Figure 34 – Principle architecture of the FS-Master . 56
Figure 35 – SMI service extensions . 58
Figure 36 – FSP parameter use cases . 70
Figure 37 – PDE Splitter . 73
Figure 38 – PDE Composer . 74
Figure 39 – Positioning of the SDCI-FS Safety Communication Layer (SCL) . 76
Figure 40 – FS-Master Safety Communication Layer services . 76
Figure 41 – FS-Device Safety Communication Layer services . 78
Figure 42 – Protocol phases to consider . 79
Figure 43 – Safety PDUs of FS-Master and FS-Device . 80
Figure 44 – The 1 % share rule of IEC 61784-3:2021 . 83
Figure 45 – SCL state machine of the FS-Master .
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