SIST EN IEC 61158-2:2024

Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition (IEC 61158-2:2023)

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.

Industrielle Kommunikationsnetze - Feldbusse - Teil 2: Spezifikation und Dienstfestlegungen des Physical Layer (Bitübertragungsschicht) (IEC 61158-2:2023)

Réseaux de communication industriels - Spécifications des bus de terrain - Partie 2: Spécification et définition des services de la couche physique (IEC 61158-2:2023)

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.

Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 2. del: Specifikacija fizične ravni in definicija opravil (IEC 61158-2:2023)

Standard IEC 61158-2:2023 spada v skupino standardov, namenjenih za lažje medsebojno povezovanje sestavnih delov avtomatizacijskega sistema. Povezan je z drugimi standardi v sklopu, kot je opredeljeno z referenčnim modelom procesnih vodil »s tremi ravnmi« iz standarda IEC 61158-1.

General Information

• Status: Published
• Publication Date: 15-Jan-2024
• ICS: 25.040 - Industrial automation systems
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100 - Open systems interconnection (OSI)
• ICS: 35.100.10 - Physical layer
• ICS: 35.110 - Networking
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Jul-2023
• Due Date: 08-Sep-2023
• Completion Date: 16-Jan-2024
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: EN IEC 61158-2:2023 - Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition

Relations

• Revised: SIST EN 61158-2:2015 - Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition (IEC 61158-2:2014)
• Effective Date: 16-Jun-2020

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2024
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 2. del:
Specifikacija fizične ravni in definicija opravil (IEC 61158-2:2023)
Industrial communication networks - Fieldbus specifications - Part 2: Physical layer
specification and service definition (IEC 61158-2:2023)
Industrielle Kommunikationsnetze - Feldbusse - Teil 2: Spezifikation und
Dienstfestlegungen des Physical Layer (Bitübertragungsschicht) (IEC 61158-2:2023)
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 2:
Spécification et définition des services de la couche physique (IEC 61158-2:2023)
Ta slovenski standard je istoveten z: EN IEC 61158-2:2023
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.10 Fizični sloj Physical layer
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61158-2

NORME EUROPÉENNE
EUROPÄISCHE NORM April 2023
ICS 25.040.40; 35.100.20; 35.240.50 Supersedes EN 61158-2:2014
English Version
Industrial communication networks - Fieldbus specifications -
Part 2: Physical layer specification and service definition
(IEC 61158-2:2023)
Réseaux de communication industriels - Spécifications des Industrielle Kommunikationsnetze - Feldbusse - Teil 2:
bus de terrain - Partie 2: Spécification et définition des Spezifikation und Dienstfestlegungen des Physical Layer
services de la couche physique (Bitübertragungsschicht)
(IEC 61158-2:2023) (IEC 61158-2:2023)
This European Standard was approved by CENELEC on 2023-04-13. 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61158-2:2023 E

European foreword
The text of document 65C/1200/FDIS, future edition 7 of IEC 61158-2, 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 61158-2:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-01-13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-04-13
document have to be withdrawn
This document supersedes EN 61158-2:2014 and all of its amendments and corrigenda (if any).
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.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association.
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 61158-2:2023 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 standard indicated:
IEC 60079-0 NOTE Approved as EN IEC 60079-0
IEC 60875-1 NOTE Approved as EN 60875-1
IEC 60947-5-2 NOTE Approved as EN IEC 60947-5-2
IEC 61158 (series) NOTE Approved as EN 61158 (series)
IEC 61158-1 NOTE Approved as EN IEC 61158-1
IEC 61158-4-1 NOTE Approved as EN 61158-4-1
IEC 61158-4-4 NOTE Approved as EN IEC 61158-4-4
IEC 61158-4-7 NOTE Approved as EN 61158-4-7
IEC 61158-4-8 NOTE Approved as EN 61158-4-8
IEC 61158-4-12 NOTE Approved as EN IEC 61158-4-12
IEC 61158-4-16 NOTE Approved as EN 61158-4-16
IEC 61158-4-18 NOTE Approved as EN 61158-4-18
IEC 61158-4-20 NOTE Approved as EN 61158-4-20
IEC 61158-4-24 NOTE Approved as EN IEC 61158-4-24
IEC 61300-3-4 NOTE Approved as EN 61300-3-4
IEC/TR 61491 NOTE Approved as CLC/TR 61491
IEC 61784-1 (series) NOTE Approved as EN IEC 61784-1 (series)
IEC 61784-2 (series) NOTE Approved as EN IEC 61784-2 (series)

To be published. Stage at the time of publication: FprEN IEC 61784-1-X:2023.
To be published. Stage at the time of publication: FprEN IEC 61784-2-X:2023.
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050 series International Electrotechnical Vocabulary - -
IEC 60079-11 - Explosive atmospheres - Part 11: EN 60079-11 -
Equipment protection by intrinsic safety "i"
IEC 60079-14 2007 Explosive atmospheres - Part 14: Electrical EN 60079-14 2008
installations design, selection and erection
IEC 60079-25 - Explosive atmospheres - Part 25: EN IEC 60079-25 -
Intrinsically safe electrical systems
IEC 60169-17 - Radio-frequency connectors. Part 17: R.F. - -
coaxial connectors with inner diameter of
outer conductor 6,5 mm (0,256 in) with
screw coupling - Characteristic impedance
50 ohms (Type TNC)
IEC 60189-1 2018 Low-frequency cables and wires with PVC - -
insulation and PVC sheath - Part 1:
General test and measuring methods
IEC 60255-22-1 1988 Electrical relays - Part 22: Electrical - -
disturbance tests for measuring relays and
protection equipment - Section 1: 1 MHz
burst disturbance tests
IEC 60364-4-41 - Low-voltage electrical installations - Part 4- HD 60364-4-41 -
41: Protection for safety - Protection
against electric shock
IEC 60364-5-54 - Low-voltage electrical installations - Part 5- HD 60364-5-54 -
54: Selection and erection of electrical
equipment - Earthing arrangements and
protective conductors
IEC 60529 - Degrees of protection provided by EN 60529 -
enclosures (IP Code)
This standard has been withdrawn.
IEC 60603-7-4 - Connectors for electronic equipment - Part EN 60603-7-4 -
7-4: Detail specification for 8-way,
unshielded, free and fixed connectors, for
data transmissions with frequencies up to
250 MHz
IEC 60754-2 - Test on gases evolved during combustion EN 60754-2 -
of materials from cables - Part 2:
Determination of acidity (by pH
measurement) and conductivity
IEC 60793 series Optical fibres EN IEC 60793 series
IEC 60793-2 2019 Optical fibres - Part 2: Product EN IEC 60793-2 2019
specifications - General
IEC 60793-2-30 2015 Optical fibres - Part 2-30: Product EN 60793-2-30 2015
specifications - Sectional specification for
category A3 multimode fibres
IEC 60793-2-40 2021 Optical fibres - Part 2-40: Product EN IEC 60793-2-40 2021
specifications - Sectional specification for
category A4 multimode fibres
IEC 60794-1-2 2003 Optical fibre cables - Part 1-2: Generic EN 60794-1-2 2003
specification - Basic optical cable test
procedures
IEC 60807-3 - Rectangular connectors for frequencies - -
below 3 MHz - Part 3: Detail specification
for a range of connectors with trapezoidal
shaped metal shells and round contacts -
Removable crimp contact types with closed
crimp barrels, rear insertion/rear extraction
IEC 60811-403 - Electric and optical fibre cables - Test EN 60811-403 -
methods for non-metallic materials - Part
403: Miscellaneous tests - Ozone
resistance test on cross-linked compounds
IEC 60811-404 2012 Electric and optical fibre cables - Test EN 60811-404 2012
methods for non-metallic materials - Part
404: Miscellaneous tests - Mineral oil
immersion tests for sheaths
IEC 61000-4-2 - Electromagnetic compatibility (EMC) - Part EN 61000-4-2 -
4-2: Testing and measurement techniques
- Electrostatic discharge immunity test
IEC 61000-4-3 - Electromagnetic compatibility (EMC) - Part EN IEC 61000-4-3 -
4-3 : Testing and measurement techniques
- Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 - Electromagnetic compatibility (EMC) - Part EN 61000-4-4 -
4-4: Testing and measurement techniques
- Electrical fast transient/burst immunity
test
IEC 61076-2-114 2020 Connectors for electrical and electronic EN IEC 61076-2-114 2020
equipment - Product requirements - Part 2-
114: Circular connectors - Detail
specification for connectors with M8 screw-
locking with power contacts and signal
contacts for data transmission up to
100 MHz
IEC 61131-2 2017 Industrial-process measurement and - -
control - Programmable controllers - Part 2:
Equipment requirements and tests
IEC 61156-1 2007 Multicore and symmetrical pair/quad - -
cables for digital communications - Part 1:
Generic specification
IEC 61158-3-20 2023 Industrial communication networks - -
Fieldbus specifications - Part 3-20: Data-
link layer service definition - Type 20
elements
IEC 61158-4-2 2023 Industrial communication networks - EN IEC 61158-4-2 2023
Fieldbus specifications - Part 4-2: Data-link
layer protocol specification - Type 2
elements
IEC 61158-4-3 2019 Industrial communication networks - EN IEC 61158-4-3 2019
Fieldbus specifications - Part 4-3: Data-link
layer protocol specification - Type 3
elements
IEC 61169-8 2007 Radio-frequency connectors - Part 8: EN 61169-8 2007
Sectional specification - RF coaxial
connectors with inner diameter of outer
conductor 6,5 mm (0,256 in) with bayonet
lock - Characteristic impedance 50 Ω (type
BNC)
IEC 61210 2010 Connecting devices - Flat quick-connect EN 61210 2010
terminations for electrical copper
conductors - Safety requirements
IEC 61754-2 - Fibre optic connector interfaces - Part 2: EN 61754-2 -
Type BFOC/2,5 connector family
IEC 61754-13 - Fibre optic connector interfaces - Part 13: EN 61754-13 -
Type FC-PC connector
IEC 61754-22 - Fibre optic connector interfaces - Part 22: EN 61754-22 -
Type F-SMA connector family
IEC 63171 - Connectors for electrical and electronic EN IEC 63171 -
equipment - Shielded or unshielded free
and fixed connectors for balanced single-
pair data transmission with current-carrying
capacity - General requirements and tests
ISO/IEC 7498 series Information technology - Open Systems - -
Interconnection - Basic reference model
ISO/IEC 7498-1 1994 Information technology - Open Systems - -
Interconnection - Basic reference model:
The basic model
ISO/IEC 8482 - Information technology - - -
Telecommunications and information
exchange between systems - Twisted pair
multipoint interconnections
EN 61158-3-20:2014 was published in parallel with IEC 61158-3-20:2014.
ISO/IEC/IEEE 8802-3 2021 Telecommunications and exchange - -
between information technology systems -
Requirements for local and metropolitan
area networks - Part 3: Standard for
Ethernet
ISO 9314-1 - Information Processing Systems - Fibre - -
distributed data interface (FDDI) - Part 1:
Token Ring physical layer protocol (PHY)
ISO/IEC 10731 1994 Information technology - Open Systems - -
Interconnection - Basic Reference Model -
Conventions for the definition of OSI
services
ISO 4892-1 - Plastics - Methods of exposure to EN ISO 4892-1 -
laboratory light sources - Part 1: General
guidance
TIA-422-B 1994 Electrical Characteristics of Balanced - -
Voltage Digital Interface Circuits
TIA-485-A 1998 Electrical Characteristics of Generators - -
and Receivers for Use in Balanced Digital
Multipoint Systems
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

IEC 61158-2:2023 © IEC:2023 – 3 –
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

IEC 61158-2:2023 © IEC:2023 – 5 –
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

IEC 61158-2:2023 © IEC:2023 – 7 –
10.4.1 MDS – MAU interface: general . 198
10.4.2 MDS – MAU interface: 5 Mbit/s, voltage-mode, coaxial wire .
...