IEC 61158-2:2023

Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition

IEC 61158-2:2023 is one of a series produced to facilitate the interconnection of automation system components. It is related to other standards in the set as defined by the "three-layer" fieldbus reference model described in IEC 61158‑1.

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 2: Spécification et définition des services de la couche physique

L'IEC 61158-2:2023 constitue une partie d'une série produite pour faciliter l'interconnexion de composants d'un système d'automation. Elle est liée à d'autres normes de la série telle qu'elle est définie par le modèle de référence des bus de terrain "à trois couches" décrit dans le rapport IEC 61158‑1.

General Information

• Status: Published
• Publication Date: 08-Mar-2023
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.20 - Data link layer
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: SC 65C - Industrial networks
• Drafting Committee: WG 9 - TC 65/SC 65C/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 31-Mar-2023
• Completion Date: 09-Mar-2023

Relations

• Revises: IEC 61158-2:2014 - Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
• Effective Date: 05-Sep-2023

Overview

IEC 61158-2:2023 is an internationally recognized standard published by the International Electrotechnical Commission (IEC) that defines the physical layer specification and service definition for industrial communication networks, specifically fieldbus systems. As part of the IEC 61158 series, this standard plays a crucial role in facilitating the interconnection of automation system components by specifying the requirements for the physical layer - the foundational hardware and signal transmission layer in fieldbus communication.

This seventh edition emphasizes various types of media and physical layers classified under a "three-layer" fieldbus reference model as detailed in IEC 61158-1. The standard supports a broad range of media types including wire media, optical media, coaxial cables, twisted-pair wires, and powered media configurations, ensuring adaptability and interoperability across diverse industrial environments.

Key Topics

IEC 61158-2:2023 comprehensively covers:

• Physical Layer Variations: Detailed specifications for multiple physical media types, including:
  • Type 1: Wire and optical media
  • Type 2: Coaxial wire and optical media
  • Type 3 & Type 8: Twisted-pair wire and optical media
  • Types 4, 12, 16, 18, 20, 24, and 28: Various wire and optical media and powered media configurations
• Service Definitions: Descriptions of the primitives and services offered by the physical layer to the data link layer, facilitating smooth data transmission and reception.
• Symbols and Terminology: Standardized definitions and abbreviations to create a common vocabulary for professionals working with fieldbus physical layers.
• Interfacing Requirements: Guidelines for the interface between the physical layer and the data link layer (DLL), including transmission requests, status indications, and error handling mechanisms.
• Patent Declarations: Notification concerning the intellectual property related to certain technologies within the scope of the standard.

Applications

IEC 61158-2:2023 is vital for engineers, system integrators, and manufacturers involved in designing and deploying industrial automation communication networks. Its physical layer specifications are widely applied in:

• Factory Automation: Enabling reliable and high-performance communication between sensors, actuators, and control devices over fieldbus networks.
• Process Control: Supporting secure data transmission in chemical, oil, gas, and pharmaceutical industries requiring robust fieldbus setups.
• Industrial Ethernet and Fieldbus Devices: Providing detailed physical layer guidelines that ensure device interoperability and network stability.
• System Integration Projects: Allowing the integration of components from different vendors by adhering to unified communication protocols and electrical standards.
• Network Infrastructure Design: Assisting in the selection and installation of appropriate media types such as twisted-pair cables, optical fibers, or coaxial cables based on environmental and operational needs.

By complying with IEC 61158-2, organizations benefit from improved network interoperability, reliable physical communication, and standardized service provisions, resulting in reduced downtime and better system scalability.

Related Standards

IEC 61158-2:2023 is part of the broader IEC 61158 family dedicated to fieldbus communications. Related standards include:

• IEC 61158-1: Fieldbus reference model – This provides the conceptual framework for the physical, data link, and application layers.
• IEC 61158-3 to 11: Covering data link layer services, application layer specifications, and communication profiles for various fieldbus types.
• IEC 61784: Profiles for industrial communication networks, specifying the protocols and configurations that complement physical layer definitions.
• IEC 61850: Communication networks and systems in substations, which sometimes integrate fieldbus standards for automation tasks.
• ISO/IEC 11801: Generic cabling for customer premises, which can complement physical media specifications in industrial settings.

Following IEC 61158-2:2023 supports adherence to a comprehensive suite of international standards, promoting interoperable and future-proof industrial communication systems.

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Keywords: IEC 61158-2:2023, industrial communication networks, fieldbus specifications, physical layer, automation systems, fieldbus physical layer, industrial Ethernet, physical layer services, twisted-pair media, optical media, IEC standards, automation network standards, industrial automation protocols, fieldbus interface, data link layer, fieldbus network design.

Standards Content (Sample)

IEC 61158-2 ®
Edition 7.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 2: Physical layer specification and service definition

Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 2: Spécification et définition des services de la couche physique

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IEC 61158-2 ®
Edition 7.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Fieldbus specifications –

Part 2: Physical layer specification and service definition

Réseaux de communication industriels – Spécifications des bus de terrain –

Partie 2: Spécification et définition des services de la couche physique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.20; 35.240.50 ISBN 978-2-8322-6552-9

– 2 – IEC 61158-2:2023 © IEC:2023
CONTENTS
FOREWORD . 36
0 INTRODUCTION . 38
0.1 General . 38
0.2 Physical layer overview . 38
0.3 Document overview . 38
0.4 Major physical layer variations specified in this document . 39
0.4.1 Type 1 media . 39
0.4.1.1 Type 1: Wire media . 39
0.4.1.2 Type 1: Optical media . 39
0.4.2 Type 2: Coaxial wire and optical media . 39
0.4.3 Type 3: Twisted-pair wire and optical media . 39
0.4.4 Type 4: Wire medium . 40
0.4.5 Type 8: Twisted-pair wire and optical media . 40
0.4.6 Type 12: Wire medium . 40
0.4.7 Type 16: optical media . 40
0.4.8 Type 18: Media . 40
0.4.8.1 Type 18: Basic media. 40
0.4.8.2 Type 18: Powered media . 40
0.4.9 Type 20: Media . 41
0.4.10 Type 24: Media . 41
0.4.10.1 Type 24: Basic media . 41
0.4.10.2 Type 24: Powered media . 41
0.4.11 Type 28: Media . 41
0.5 Patent declaration . 41
1 Scope . 43
2 Normative references . 43
3 Terms and definitions . 46
3.1 Common terms and definitions . 46
3.2 Type 1: Terms and definitions . 50
3.3 Type 2: Terms and definitions . 53
3.4 Type 3: Terms and definitions . 57
3.5 Type 4: Terms and definitions . 60
3.6 Void . 61
3.7 Type 8: Terms and definitions . 61
3.8 Type 12: Terms and definitions . 64
3.9 Type 16: Terms and definitions . 64
3.10 Type 18: Terms and definitions . 67
3.11 Type 24: Terms and definitions . 68
3.12 Type 20: Terms and definitions . 70
3.13 Type 28: Terms and definitions . 72
4 Symbols and abbreviated terms . 74
4.1 Symbols . 74
4.1.1 Type 1: Symbols . 74
4.1.2 Type 2: Symbols . 75
4.1.3 Type 3: Symbols . 76
4.1.4 Type 4: Symbols . 76
4.1.5 Void . 76

4.1.6 Type 8: Symbols . 76
4.1.7 Type 12: Symbols . 77
4.1.8 Type 16: Symbols . 77
4.1.9 Type 18: Symbols . 77
4.1.10 Type 24: Symbols . 78
4.1.11 Type 20: Symbols . 78
4.1.12 Type 28: Symbols . 78
4.2 Abbreviated terms . 79
4.2.1 Type 1: Abbreviations . 79
4.2.2 Type 2: Abbreviations . 80
4.2.3 Type 3: Abbreviations . 80
4.2.4 Type 4: Abbreviations . 82
4.2.5 Void . 82
4.2.6 Type 8: Abbreviations . 82
4.2.7 Type 12: Abbreviations . 84
4.2.8 Type 16: Abbreviations . 84
4.2.9 Type 18: Abbreviations . 84
4.2.10 Type 24: Abbreviations . 85
4.2.11 Type 20: Abbreviations . 85
4.2.12 Type 28: Abbreviations . 85
5 DLL – PhL interface . 86
5.1 General . 86
5.2 Type 1: Required services . 87
5.2.1 Primitives of the PhS . 87
5.2.2 Notification of PhS characteristics . 88
5.2.3 Transmission of Ph-user-data . 89
5.2.4 Reception of Ph-user-data . 89
5.3 Type 2: Required services . 89
5.3.1 General . 89
5.3.2 M_symbols . 89
5.3.3 PH-LOCK indication . 90
5.3.4 PH-FRAME indication . 90
5.3.5 PH-CARRIER indication . 90
5.3.6 PH-DATA indication . 90
5.3.7 PH-STATUS indication . 90
5.3.8 PH-DATA request . 91
5.3.9 PH-FRAME request . 91
5.3.10 PH-JABBER indication . 91
5.3.11 Ph-JABBER-CLEAR request . 91
5.3.12 Ph-JABBER-TYPE request . 91
5.4 Type 3: Required services . 92
5.4.1 Synchronous transmission . 92
5.4.2 Asynchronous transmission . 92
5.5 Type 4: Required services . 93
5.5.1 General . 93
5.5.2 Primitives of the PhS . 93
5.5.3 Transmission of Ph-user data . 94
5.6 Void . 94
5.7 Type 8: Required services . 95

– 4 – IEC 61158-2:2023 © IEC:2023
5.7.1 General . 95
5.7.2 Primitives of the PhS . 95
5.7.3 Overview of the Interactions . 96
5.8 Type 12: Required services . 102
5.9 Type 16: Required services . 103
5.9.1 Primitives of the PhS . 103
5.9.2 Transmission of Ph-user-data . 103
5.9.3 Reception of Ph-user-data . 104
5.10 Type 18: Required services . 104
5.10.1 General . 104
5.10.2 Primitives of the PhS . 104
5.10.3 Transmission of Ph-user-data . 105
5.10.4 Reception of Ph-user-data . 105
5.11 Type 24: Required services . 105
5.11.1 General . 105
5.11.2 DL_Symbols . 106
5.11.3 PLS_CARRIER indication . 106
5.11.4 PLS_SIGNAL indication . 106
5.11.5 PLS_DATA_VALID indication . 106
5.11.6 PLS_DATA indication . 106
5.11.7 PLS_DATA request . 106
5.12 Type 20: Required services . 106
5.12.1 Facilities of the physical layer services . 106
5.12.2 Sequence of primitives . 107
5.12.3 PH-START service . 107
5.12.4 PH-DATA service . 108
5.12.5 PH-END service . 108
5.13 Type 28: Required services . 109
5.13.1 General . 109
5.13.2 Ph-Param (para, value). 109
5.13.3 Ph-Data (length, data, status) . 110
5.13.4 Ph-Clock-Sync (command, data, ofdmtiming) . 111
6 Systems management – PhL interface . 112
6.1 General . 112
6.2 Type 1: Systems management – PhL interface . 112
6.2.1 Required services . 112
6.2.2 Service primitive requirements . 112
6.3 Type 3: Systems management – PhL interface . 114
6.3.1 Synchronous transmission . 114
6.3.2 Asynchronous transmission . 114
6.4 Type 4: Systems management – PhL interface . 119
6.4.1 Required Services . 119
6.4.2 Service primitive requirements . 120
6.5 Void . 120
6.6 Type 8: Systems management – PhL interface . 120
6.6.1 Functionality of the PhL Management . 120
6.6.2 PhL-PNM1 Interface . 120
6.7 Type 12: Systems management – PhL interface . 125
6.8 Type 18: Systems management – PhL interface . 125

6.8.1 General . 125
6.8.2 Required services . 125
6.8.3 Service primitive requirements . 125
6.9 Type 24: Systems management – PhL interface . 126
6.10 Type 28: Systems management – PhL interface . 126
6.10.1 General . 126
6.10.2 PhL related management information table . 126
6.10.3 Service primitive . 132
7 DCE independent sublayer (DIS) . 135
7.1 General . 135
7.2 Type 1: DIS . 136
7.3 Type 3: DIS . 136
7.3.1 Synchronous transmission . 136
7.3.2 Asynchronous transmission . 136
7.4 Void . 136
7.5 Type 8: DIS . 136
7.5.1 General . 136
7.5.2 Function . 136
7.5.3 Serial transmission . 136
7.5.4 MDS coupling . 137
7.6 Type 12: DIS . 138
7.7 Type 28: DIS . 138
8 DTE – DCE interface and MIS-specific functions . 138
8.1 General . 138
8.2 Type 1: DTE – DCE interface . 139
8.2.1 Services . 139
8.2.2 Signaling interfaces . 140
8.3 Type 3: DTE – DCE interface . 149
8.3.1 Synchronous transmission . 149
8.3.2 Asynchronous transmission . 149
8.4 Type 8: MIS – MDS interface . 150
8.4.1 General . 150
8.4.2 Services . 150
8.4.3 Interface signals . 151
8.4.4 Converting the services to the interface signals . 152
8.5 Type 12: DTE – DCE interface . 159
8.6 Type 28: DTE – DCE interface and MIS Specific function . 159
8.6.1 General . 159
8.6.2 MIS Specific function . 159
8.6.3 DTE – DCE interface . 166
9 Medium dependent sublayer (MDS) . 168
9.1 General . 168
9.2 Type 1: MDS: Wire and optical media . 168
9.2.1 PhPDU . 168
9.2.2 Encoding and decoding . 168
9.2.3 Polarity detection . 170
9.2.4 Start of frame delimiter . 170
9.2.5 End of frame delimiter . 170
9.2.6 Preamble . 170

– 6 – IEC 61158-2:2023 © IEC:2023
9.2.7 Synchronization . 171
9.2.8 Post-transmission gap . 171
9.2.9 Inter-channel signal skew . 171
9.3 Void . 171
9.4 Type 2: MDS: Wire and optical media . 172
9.4.1 General . 172
9.4.2 Clock accuracy . 172
9.4.3 Data recovery . 172
9.4.4 Data encoding rules . 172
9.5 Type 3: MDS: Wire and optical media . 173
9.5.1 Synchronous transmission . 173
9.5.2 Asynchronous transmission . 173
9.6 Type 4: MDS: Wire medium . 173
9.6.1 Half-duplex . 173
9.6.2 Full-duplex . 175
9.6.3 Full-duplex UDP . 177
9.7 Void . 178
9.8 Type 8: MDS: Wire and optical media . 178
9.8.1 Function . 178
9.8.2 PhPDU formats . 179
9.8.3 Idle states . 183
9.8.4 Reset PhPDU . 183
9.8.5 MAU coupling . 184
9.9 Type 12: MDS: Wire media . 185
9.10 Type 16: MDS: Optical media . 185
9.10.1 Data encoding rules . 185
9.10.2 Telegrams and fill characters . 186
9.11 Type 18: MDS: Wire media . 186
9.11.1 Overview . 186
9.11.2 Transmission . 187
9.11.3 Reception . 187
9.12 Type 24: MDS: Twisted-pair wire . 187
9.12.1 General . 187
9.12.2 Clock accuracy . 187
9.12.3 Data recovery . 188
9.12.4 Data encoding rules . 188
9.13 Type 28: MDS: Twisted-pair wire and coaxial media . 189
9.13.1 General . 189
9.13.2 MDS specification . 189
10 MDS – MAU interface . 196
10.1 General . 196
10.2 Type 1: MDS – MAU interface: Wire and optical media . 197
10.2.1 Services . 197
10.2.2 Service specifications . 197
10.2.3 Signal characteristics. 197
10.2.4 Communication mode . 198
10.2.5 Timing characteristics . 198
10.3 Void . 198
10.4 Type 2: MDS – MAU interface: Wire and optical media . 198

10.4.1 MDS – MAU interface: general . 198
10.4.2 MDS – MAU interface: 5 Mbit/s, voltage-mode, coaxial wire . 199
10.4.3 MDS – MAU interface 5 Mbit/s, optical medium . 199
10.4.4 MDS – MAU interface Network Access Port (NAP) . 200
10.5 Type 3: MDS – MAU interface: Wire and optical media . 200
10.5.1 Synchronous transmission . 200
10.5.2 Asynchronous transmission . 201
10.6 Type 8: MDS – MAU interface: Wire and optical media . 201
10.6.1 Overview of the services . 201
10.6.2 Description of the services . 201
10.6.3 Time response . 202
10.6.4 Transmission mode . 202
10.7 Type 18: MDS – MAU interface: Wire media . 203
10.7.1 General . 203
10.7.2 Services . 203
10.7.3 Service specifications . 203
10.7.4 Signal characteristics. 203
10.7.5 Communication mode . 204
10.7.6 Timing characteristics . 204
10.8 Type 24: MDS – MAU interface: Twisted-pair wire medium . 204
10.8.1 Overview of service . 204
10.8.2 Description of the services . 204
10.9 Type 28: MDS – MAU interface: Twisted-pair wire and coaxial media . 205
10.9.1 General . 205
10.9.2 Services . 205
10.9.3 Service process . 206
10.9.4 Service specifications . 206
10.9.5 Transmit specifications . 207
11 Types 1 and 7: Medium attachment unit: voltage mode, linear-bus-topology 150 Ω

twisted-pair wire medium . 208
11.1 General . 208
11.2 Bit-rate-dependent quantities . 208
11.3 Network specifications . 209
11.3.1 Components . 209
11.3.2 Topologies . 209
11.3.3 Network configuration rules . 210
11.3.4 Power distribution rules for network configuration . 211
11.4 MAU transmit circuit specification . 211
11.4.1 Summary . 211
11.4.2 MAU test configuration . 212
11.4.3 MAU output level requirements . 213
11.4.4 MAU output timing requirements . 214
11.4.5 Signal polarity . 215
11.5 MAU receive circuit specification. 216
11.5.1 Summary . 216
11.5.2 Input impedance . 216
11.5.3 Receiver sensitivity and noise rejection . 217
11.5.4 Received bit cell jitter . 217
11.5.5 Interference susceptibility and error rates . 217

– 8 – IEC 61158-2:2023 © IEC:2023
11.6 Jabber inhibit . 218
11.7 Power distribution . 218
11.7.1 Overview . 218
11.7.2 Supply voltage . 219
11.7.3 Powered via signal conductors . 219
11.7.4 Powered separately from signal conductors . 220
11.7.5 Electrical isolation . 220
11.8 Medium specifications . 221
11.8.1 Connector . 221
11.8.2 Standard test cable . 221
11.8.3 Coupler. 222
11.8.4 Splices . 222
11.8.5 Terminator . 222
11.8.6 Shielding rules . 222
11.8.7 Grounding (earthing) rules . 223
11.8.8 Color coding of cables . 223
12 Types 1 and 3: Medium attachment unit: 31,25 kbit/s, voltage-mode with low-

power option, bus- and tree-topology, 100 Ω wire medium . 223
12.1 General . 223
12.2 Transmitted bit rate . 224
12.3 Network specifications . 224
12.3.1 Components . 224
12.3.2 Topologies . 224
12.3.3 Network configuration rules . 225
12.3.4 Power distribution rules for network configuration . 226
12.4 MAU transmit circuit specification . 227
12.4.1 Summary . 227
12.4.2 MAU test configuration . 227
12.4.3 MAU output level requirements . 227
12.4.4 Output timing requirements . 228
12.4.5 Signal polarity . 229
12.4.6 Transition from receive to transmit . 229
12.5 M
...