IEC 61158-2:2010
(Main)Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
IEC 61158-2:2010 specifies the requirements for fieldbus component parts. It also specifies the media and network configuration requirements necessary to ensure agreed levels of:
a) data integrity before data-link layer error checking;
b) interoperability between devices at the physical layer. The fieldbus physical layer conforms to layer 1 of the OSI 7-layer model as defined by ISO 7498 with the exception that, for some types, frame delimiters are in the physical layer while for other types they are in the data-link layer. This fifth edition cancels and replaces the fourth edition published in 2007 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- for Type 18, Table 157 reduced tolerance to 5 %;
- for Type 18, in 32.5.3.1 removed minimum cable length;
- for Type 18, in 32.5.4. and R.2.2 cable reference removed;
- for Type 18, Table 160 and 161 terminating resistor value changed to 680 Ω. This bilingual version published in 2011-12, corresponds to the English version published in 2010-07.
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 2: Spécification de couche physique et définition des services
La CEI 61158-2:2010 spécifie les exigences applicables aux composants de bus de terrain. Elle spécifie également les exigences de configuration des supports et des réseaux requises pour garantir un niveau d'intégrité des données:
a) avant vérification d'erreur de la couche liaison de données;
b) interopérabilité entre dispositifs au niveau de la couche physique. La couche physique des bus de terrain est conforme à la couche 1 du modèle OSI à 7 couches, telle que définie dans l'ISO 7498, à l'exception du fait que, pour certains types, les délimiteurs de trame se trouvent dans la couche physique tandis que pour d'autres types, ils se trouvent dans la couche liaison de données. Cette cinquième édition annule et remplace la quatrième édition parue en 2007 et constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes:
- Pour le Type 18, Tableau 157, tolérance réduite à 5 %;
- Pour le Type 18, en 32.5.3.1, la longueur minimale du câble a été retirée;
- Pour le Type 18, en 32.5.4 et R.2.2, la référence du câble a été retirée;
- Pour le Type 18, Tableaux 160 et 161, la valeur de la résistance de terminaison a été modifiée à 680 Ω. La présente version bilingue, correspond à la version anglaise monolingue publiée en 2010-07.
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IEC 61158-2
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Industrial communication networks – Fieldbus specifications –
Part 2: Physical layer specification and service definition
IEC 61158-2:2010(E)
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THIS PUBLICATION IS COPYRIGHT PROTECTED
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IEC 61158-2
®
Edition 5.0 2010-07
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Fieldbus specifications –
Part 2: Physical layer specification and service definition
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XH
ICS, 25.040, 35.100, 35.240.50 ISBN 978-2-88912-051-2
® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – 61158-2 © IEC:2010(E)
CONTENTS
FOREWORD.14
0 Introduction .16
1 Scope.20
2 Normative references .20
3 Terms and definitions .22
4 Symbols and abbreviations.45
5 DLL – PhL interface.56
6 Systems management – PhL interface.77
7 DCE independent sublayer (DIS) .91
8 DTE – DCE interface and MIS-specific functions .93
9 Medium dependent sublayer (MDS) .114
10 MDS – MAU interface .135
11 Types 1 and 7: Medium attachment unit: voltage mode, linear-bus-topology 150 Ω
twisted-pair wire medium .143
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 .158
13 Type 1: Medium attachment unit: current mode, twisted-pair wire medium. 175
14 Type 1: Medium attachment unit: current mode (1 A), twisted-pair wire medium .185
15 Types 1 and 7: Medium attachment unit: dual-fiber optical media . 194
16 Type 1: Medium attachment unit: 31,25 kbit/s, single-fiber optical medium . 201
17 Type 1: Medium attachment unit: radio signaling .204
18 Type 2: Medium attachment unit: 5 Mbit/s, voltage-mode, coaxial wire medium . 214
19 Type 2: Medium attachment unit: 5 Mbit/s, optical medium . 226
20 Type 2: Medium attachment unit: network access port (NAP) . 231
21 Type 3: Medium attachment unit: synchronous transmission, 31,25 kbit/s, voltage
mode, wire medium .234
22 Type 3: Medium attachment unit: asynchronous transmission, wire medium . 251
23 Type 3: Medium attachment unit: asynchronous transmission, optical medium .268
24 Type 4: Medium attachment unit: RS-485 .277
25 Type 4: Medium attachment unit: RS-232 .279
26 Type 6: This clause has been removed.280
27 Type 8: Medium attachment unit: twisted-pair wire medium . 280
28 Type 8: Medium attachment unit: optical media .285
29 Type 12: Medium attachment unit: electrical medium. 292
30 Type 16: Medium attachment unit: optical fiber medium at 2, 4, 8 and 16 Mbit/s .294
31 Type 18: Medium attachment unit: basic medium.307
32 Type 18: Medium attachment unit: powered medium.311
Annex A (normative) Type 1: Connector specification .320
Annex B (informative) Types 1 and 3: Cable specifications and trunk and spur lengths
for the 31,25 kbit/s voltage-mode MAU .328
Annex C (informative) Types 1 and 7: Optical passive stars. 330
Annex D (informative) Types 1 and 7: Star topology .331
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61158-2 © IEC:2010(E) – 3 –
Annex E (informative) Type 1: Alternate fibers .335
Annex F (normative) Type 2: Connector specification . 336
Annex G (normative) Type 2: Repeater machine sublayers (RM, RRM) and redundant
PhLs .339
Annex H (informative) Type 2: Reference design examples.350
Annex I (normative) Type 3: Connector specification.356
Annex J (normative) Type 3: Redundancy of PhL and medium. 363
Annex K (normative) Type 3: Optical network topology .364
Annex L (informative) Type 3: Reference design examples for asynchronous
transmission, wire medium, intrinsically safe.373
Annex M (normative) Type 8: Connector specification.375
Annex N (normative) Type 16: Connector specification . 380
Annex O (normative) Type 16: Optical network topology . 381
Annex P (informative) Type 16: Reference design example. 386
Annex Q (normative) Type 18: Connector specification . 390
Annex R (normative) Type 18: Media cable specifications. 395
Bibliography.399
Figure 1 – General model of physical layer .17
Figure 2 – Mapping between data units across the DLL – PhL interface.57
Figure 3 – Data service for asynchronous transmission.62
Figure 4 – Interactions for a data sequence of a master: identification cycle .67
Figure 5 – Interactions for a data sequence of a master: data cycle .68
Figure 6 – Interactions for a data sequence of a slave: identification cycle.69
Figure 7 – Interactions for a data sequence of a slave: data cycle .70
Figure 8 – Interactions for a check sequence of a master .71
Figure 9 – Interactions for a check sequence of a slave.72
Figure 10 – Reset, Set-value, Get-value .81
Figure 11 – Event service .81
Figure 12 – Interface between PhL and PNM1 in the layer model.86
Figure 13 – Reset, Set-value, Get-value PhL services .87
Figure 14 – Event PhL service .87
Figure 15 – Allocation of the interface number .88
Figure 16 – Configuration of a master .92
Figure 17 – Configuration of a slave with an alternative type of transmission .93
Figure 18 – Configuration of a bus coupler with an alternative type of transmission .93
Figure 19 – DTE/DCE sequencing machines.98
Figure 20 – State transitions with the ID cycle request service. 107
Figure 21 – MIS-MDS interface: identification cycle request service. 108
Figure 22 – MIS-MDS interface: identification cycle request service. 109
Figure 23 – State transitions with the data cycle request service . 109
Figure 24 – MIS-MDS interface: data cycle request service . 110
Figure 25 – State transitions with the data sequence classification service .110
Figure 26 – Protocol machine for the message transmission service. 111
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– 4 – 61158-2 © IEC:2010(E)
Figure 27 – Protocol machine for the data sequence identification service . 112
Figure 28 – Protocol machine for the message receipt service. 113
Figure 29 – Protocol data unit (PhPDU) .114
Figure 30 – PhSDU encoding and decoding .115
Figure 31 – Manchester encoding rules .115
Figure 32 – Preamble and delimiters.117
Figure 33 – Manchester coded symbols .118
Figure 34 – PhPDU format, half duplex .119
Figure 35 – PhPDU format, full duplex .121
Figure 36 – Data sequence PhPDU.125
Figure 37 – Structure of the header in a data sequence PhPDU. 125
Figure 38 – Check sequence PhPDU .126
Figure 39 – Structure of a headers in a check sequence PhPDU. 126
Figure 40 – Structure of the status PhPDU.127
Figure 41 – Structure of the header in a status PhPDU . 127
Figure 42 – Structure of the medium activity status PhPDU .128
Figure 43 – Structure of the header in a medium activity status PhPDU . 128
Figure 44 – Reset PhPDU.129
Figure 45 – Configuration of a master .130
Figure 46 – Configuration of a slave .130
Figure 47 – Configuration of a bus coupler.130
Figure 48 – Protocol data unit .131
Figure 49 – PhSDU encoding and decoding .131
Figure 50 – Manchester encoding rules .131
Figure 51 – Example of an NRZI-coded signal .134
Figure 52 – Fill signal .134
Figure 53 – Jitter tolerance .141
Figure 54 – Transmit circuit test configuration.147
Figure 55 – Output waveform.148
Figure 56 – Transmitted and received bit cell jitter (zero crossing point deviation) . 149
Figure 57 – Signal polarity .150
Figure 58 – Receiver sensitivity and noise rejection.151
Figure 59 – Power supply ripple and noise.154
Figure 60 – Fieldbus coupler.156
Figure 61 – Transition from receiving to transmitting.163
Figure 62 – Power supply ripple and noise.167
Figure 63 – Test circuit for single-output power supplies.168
Figure 64 – Test circuit for power distribution through an IS barrier .169
Figure 65 – Test circuit for multiple output supplies with signal coupling .170
Figure 66 – Fieldbus coupler.172
Figure 67 – Protection resistors .172
Figure 68 – Test configuration for current-mode MAU .178
Figure 69 – Transmitted and received bit cell jitter (zero crossing point deviation) . 179
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61158-2 © IEC:2010(E) – 5 –
Figure 70 – Noise test circuit for current-mode MAU .181
Figure 71 – Transmitted and received bit cell jitter (zero crossing point deviation) . 189
Figure 72 – Power supply harmonic distortion and noise.192
Figure 73 – Optical wave shape template.197
Figure 74 – Cellular radio topology and reuse of frequencies .208
Figure 75 – Radio segment between wired segments topology . 209
Figure 76 – Mixed wired and radio medium fieldbus topology.210
Figure 77 – Components of 5 Mbit/s, voltage-mode, coaxial wire PhL variant. 215
Figure 78 – Coaxial wire MAU block diagram .215
Figure 79 – Coaxial wire MAU transmitter .216
Figure 80 – Coaxial wire MAU receiver operation.217
Figure 81 – Coaxial wire MAU transmit mask .218
Figure 82 – Coaxial wire MAU receive mask .219
Figure 83 – Transformer symbol .220
Figure 84 – 5 Mbit/s, voltage-mode, coaxial wire topology example . 222
Figure 85 – Coaxial wire medium topology limits.223
Figure 86 – Coaxial wire medium tap electrical characteristics. 224
Figure 87 – MAU block diagram 5 Mbit/s, optical fiber medium . 227
Figure 88 – NAP reference model .231
Figure 89 – Example of transient and permanent nodes. 232
Figure 90 – NAP transceiver .233
Figure 91 – NAP cable.234
Figure 92 – Circuit diagram of the principle of measuring impedance. 239
Figure 93 – Definition of CMRR .240
Figure 94 – Block circuit diagram of the principle of measuring CMRR. 240
Figure 95 – Power supply ripple and noise.243
Figure 96 – Output characteristic curve of a power supply of the category EEx ib . 250
Figure 97 – Output characteristic curve of a power supply of the category EEx ia . 250
Figure 98 – Repeater in linear bus topology.253
Figure 99 – Repeater in tree topology .253
Figure 100 – Example for a connector with integrated inductance . 255
Figure 101 – Interconnecting wiring .255
Figure 102 – Bus terminator.256
Figure 103 – Linear structure of an intrinsically safe segment . 258
Figure 104 – Topology example extended by repeaters .259
Figure 105 – Bus terminator.261
Figure 106 – Waveform of the differential voltage .262
Figure 107 – Test set-up for the measurement of the idle level for devices with an
integrated termination resistor .264
Figure 108 – Test set-up for the measurement of the idle level for devices with a
connectable termination resistor . 264
Figure 109 – Test set-up for measurement of the transmission levels . 265
Figure 110 – Test set-up for the measurement of the receiving levels . 265
Figure 111 – Fieldbus model for intrinsic safety .266
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– 6 – 61158-2 © IEC:2010(E)
Figure 112 – Communication device model for intrinsic safety . 266
Figure 113 – Connection to the optical network.269
Figure 114 – Principle structure of optical networking . 270
Figure 115 – Definition of the standard optical link. 270
Figure 116 – Signal template for the optical transmitter .275
Figure 117 – Recommended interface circuit .279
Figure 118 – MAU of an outgoing interface .280
Figure 119 – MAU of an incoming interface.281
Figure 120 – Remote bus link .281
Figure 121 – Interface to the transmission medium .282
Figure 122 – Wiring .285
Figure 123 – Terminal resistor network .285
Figure 124 – Fiber optic remote bus cable .286
Figure 125 – Optical fiber remote bus link.286
Figure 126 – Optical wave shape template optical MAU .288
Figure 127 – Optical transmission line .294
Figure 128 – Optical signal envelope .296
Figure 129 – Display of jitter (J ).297
noise
Figure 130 – Input-output performance of a slave .299
Figure 131 – Functions of a master connection .302
Figure 132 – Valid transmitting signals during the transition from fill signal to telegram
delimiters.304
Figure 133 – Valid transmitting signals during the transition from telegram delimiter to
fill signal .305
Figure 134 – Functions of a slave connection .306
Figure 135 – Network with two slaves .307
Figure 136 – Minimum interconnecting wiring.308
Figure 137 – Dedicated cable topology .309
Figure 138 – T-branch topology .309
Figure 139 – Communication element isolation .311
Figure 140 – Communication element and I/O isolation.311
Figure 141 – Minimum interconnecting wiring.312
Figure 142 – Flat cable topology.313
Figure 143 – Dedicated cable topology .313
Figure 144 – T-branch topology .313
Figure 145 – Type 18-PhL-P power distribution.316
Figure 146 – Type 18-PhL-P power distribution.316
Figure 147 – Type 18-PhL-P power supply filtering and protection . 318
Figure 148 – Communication element isolation .318
Figure 149 – Communication element and i/o isolation . 318
Figure 150 – PhL-P power supply circuit .319
Figure A.1 – Internal fieldbus connector.320
Figure A.2 – Contact designations for the external connector for harsh industrial
environments .322
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61158-2 © IEC:2010(E) – 7 –
Figure A.3 – External fieldbus connector keyways, keys, and bayonet pins and grooves.322
Figure A.4 – External fieldbus connector intermateability dimensions. 323
Figure A.5 – External fieldbus connector contact arrangement. 324
Figure A.6 – Contact designations for the external connector for typical industrial
environments .325
Figure A.7 – External fixed (device) side connector for typical industrial environments:
dimensions .325
Figure A.8 – External free (cable) side connector for typical industrial environments:
dimensions .326
Figure A.9 – Optical connector for typical industrial environments (FC connector) . 326
Figure A.10 – Optical connector for typical industrial environments (ST connector).327
Figure C.1 – Example of an optical passive reflective star . 330
Figure C.2 – Example of an optical passive transmitive star. 330
Figure D.1 – Example of star topology with 31,25 kbit/s, single fiber mode, optical MAU.331
Figure D.2 – Multi-star topology with an optical MAU .
...
IEC 61158-2
®
Edition 5.0 2010-07
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 de couche physique et définition des services
IEC 61158-2:2010
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2010 IEC, Geneva, Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
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IEC 61158-2
®
Edition 5.0 2010-07
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 de couche physique et définition des services
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XH
CODE PRIX
ICS 25.040; 35.100; 35.240.50 ISBN 978-2-88912-805-1
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 61158-2 IEC:2010
CONTENTS
FOREWORD . 14
0 Introduction . 16
1 Scope . 20
2 Normative references . 20
3 Terms and definitions . 22
4 Symbols and abbreviations . 45
5 DLL – PhL interface . 56
6 Systems management – PhL interface . 77
7 DCE independent sublayer (DIS) . 91
8 DTE – DCE interface and MIS-specific functions . 93
9 Medium dependent sublayer (MDS) . 114
10 MDS – MAU interface . 135
11 Types 1 and 7: Medium attachment unit: voltage mode, linear-bus-topology 150 Ω
twisted-pair wire medium . 143
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 . 158
13 Type 1: Medium attachment unit: current mode, twisted-pair wire medium . 175
14 Type 1: Medium attachment unit: current mode (1 A), twisted-pair wire medium . 185
15 Types 1 and 7: Medium attachment unit: dual-fiber optical media . 194
16 Type 1: Medium attachment unit: 31,25 kbit/s, single-fiber optical medium . 201
17 Type 1: Medium attachment unit: radio signaling . 204
18 Type 2: Medium attachment unit: 5 Mbit/s, voltage-mode, coaxial wire medium . 214
19 Type 2: Medium attachment unit: 5 Mbit/s, optical medium . 226
20 Type 2: Medium attachment unit: network access port (NAP) . 231
21 Type 3: Medium attachment unit: synchronous transmission, 31,25 kbit/s, voltage
mode, wire medium . 234
22 Type 3: Medium attachment unit: asynchronous transmission, wire medium . 251
23 Type 3: Medium attachment unit: asynchronous transmission, optical medium . 268
24 Type 4: Medium attachment unit: RS-485 . 277
25 Type 4: Medium attachment unit: RS-232 . 279
26 Type 6: This clause has been removed . 280
27 Type 8: Medium attachment unit: twisted-pair wire medium . 280
28 Type 8: Medium attachment unit: optical media . 285
29 Type 12: Medium attachment unit: electrical medium . 292
30 Type 16: Medium attachment unit: optical fiber medium at 2, 4, 8 and 16 Mbit/s . 294
31 Type 18: Medium attachment unit: basic medium . 307
32 Type 18: Medium attachment unit: powered medium. 311
Annex A (normative) Type 1: Connector specification . 320
Annex B (informative) Types 1 and 3: Cable specifications and trunk and spur lengths
for the 31,25 kbit/s voltage-mode MAU . 328
Annex C (informative) Types 1 and 7: Optical passive stars . 330
Annex D (informative) Types 1 and 7: Star topology . 331
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61158-2 IEC:2010 – 3 –
Annex E (informative) Type 1: Alternate fibers . 335
Annex F (normative) Type 2: Connector specification . 336
Annex G (normative) Type 2: Repeater machine sublayers (RM, RRM) and redundant
PhLs . 339
Annex H (informative) Type 2: Reference design examples. 350
Annex I (normative) Type 3: Connector specification. 356
Annex J (normative) Type 3: Redundancy of PhL and medium . 363
Annex K (normative) Type 3: Optical network topology . 364
Annex L (informative) Type 3: Reference design examples for asynchronous
transmission, wire medium, intrinsically safe . 373
Annex M (normative) Type 8: Connector specification . 375
Annex N (normative) Type 16: Connector specification . 380
Annex O (normative) Type 16: Optical network topology . 381
Annex P (informative) Type 16: Reference design example . 386
Annex Q (normative) Type 18: Connector specification . 390
Annex R (normative) Type 18: Media cable specifications . 395
Bibliography . 399
Figure 1 – General model of physical layer . 17
Figure 2 – Mapping between data units across the DLL – PhL interface . 57
Figure 3 – Data service for asynchronous transmission. 62
Figure 4 – Interactions for a data sequence of a master: identification cycle . 67
Figure 5 – Interactions for a data sequence of a master: data cycle . 68
Figure 6 – Interactions for a data sequence of a slave: identification cycle. 69
Figure 7 – Interactions for a data sequence of a slave: data cycle . 70
Figure 8 – Interactions for a check sequence of a master . 71
Figure 9 – Interactions for a check sequence of a slave . 72
Figure 10 – Reset, Set-value, Get-value . 81
Figure 11 – Event service . 81
Figure 12 – Interface between PhL and PNM1 in the layer model . 86
Figure 13 – Reset, Set-value, Get-value PhL services . 87
Figure 14 – Event PhL service . 87
Figure 15 – Allocation of the interface number . 88
Figure 16 – Configuration of a master . 92
Figure 17 – Configuration of a slave with an alternative type of transmission . 93
Figure 18 – Configuration of a bus coupler with an alternative type of transmission . 93
Figure 19 – DTE/DCE sequencing machines . 98
Figure 20 – State transitions with the ID cycle request service . 107
Figure 21 – MIS-MDS interface: identification cycle request service . 108
Figure 22 – MIS-MDS interface: identification cycle request service . 109
Figure 23 – State transitions with the data cycle request service . 109
Figure 24 – MIS-MDS interface: data cycle request service . 110
Figure 25 – State transitions with the data sequence classification service . 110
Figure 26 – Protocol machine for the message transmission service . 111
---------------------- Page: 5 ----------------------
– 4 – 61158-2 IEC:2010
Figure 27 – Protocol machine for the data sequence identification service . 112
Figure 28 – Protocol machine for the message receipt service . 113
Figure 29 – Protocol data unit (PhPDU) . 114
Figure 30 – PhSDU encoding and decoding . 115
Figure 31 – Manchester encoding rules . 115
Figure 32 – Preamble and delimiters . 117
Figure 33 – Manchester coded symbols . 118
Figure 34 – PhPDU format, half duplex . 119
Figure 35 – PhPDU format, full duplex . 121
Figure 36 – Data sequence PhPDU . 125
Figure 37 – Structure of the header in a data sequence PhPDU . 125
Figure 38 – Check sequence PhPDU . 126
Figure 39 – Structure of a headers in a check sequence PhPDU . 126
Figure 40 – Structure of the status PhPDU. 127
Figure 41 – Structure of the header in a status PhPDU . 127
Figure 42 – Structure of the medium activity status PhPDU . 128
Figure 43 – Structure of the header in a medium activity status PhPDU . 128
Figure 44 – Reset PhPDU . 129
Figure 45 – Configuration of a master . 130
Figure 46 – Configuration of a slave . 130
Figure 47 – Configuration of a bus coupler. 130
Figure 48 – Protocol data unit . 131
Figure 49 – PhSDU encoding and decoding . 131
Figure 50 – Manchester encoding rules . 131
Figure 51 – Example of an NRZI-coded signal . 134
Figure 52 – Fill signal . 134
Figure 53 – Jitter tolerance . 141
Figure 54 – Transmit circuit test configuration . 147
Figure 55 – Output waveform . 148
Figure 56 – Transmitted and received bit cell jitter (zero crossing point deviation) . 149
Figure 57 – Signal polarity . 150
Figure 58 – Receiver sensitivity and noise rejection . 151
Figure 59 – Power supply ripple and noise . 154
Figure 60 – Fieldbus coupler . 156
Figure 61 – Transition from receiving to transmitting . 163
Figure 62 – Power supply ripple and noise . 167
Figure 63 – Test circuit for single-output power supplies . 168
Figure 64 – Test circuit for power distribution through an IS barrier . 169
Figure 65 – Test circuit for multiple output supplies with signal coupling . 170
Figure 66 – Fieldbus coupler . 172
Figure 67 – Protection resistors . 172
Figure 68 – Test configuration for current-mode MAU . 178
Figure 69 – Transmitted and received bit cell jitter (zero crossing point deviation) . 179
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61158-2 IEC:2010 – 5 –
Figure 70 – Noise test circuit for current-mode MAU . 181
Figure 71 – Transmitted and received bit cell jitter (zero crossing point deviation) . 189
Figure 72 – Power supply harmonic distortion and noise . 192
Figure 73 – Optical wave shape template. 197
Figure 74 – Cellular radio topology and reuse of frequencies . 208
Figure 75 – Radio segment between wired segments topology . 209
Figure 76 – Mixed wired and radio medium fieldbus topology . 210
Figure 77 – Components of 5 Mbit/s, voltage-mode, coaxial wire PhL variant. 215
Figure 78 – Coaxial wire MAU block diagram . 215
Figure 79 – Coaxial wire MAU transmitter . 216
Figure 80 – Coaxial wire MAU receiver operation . 217
Figure 81 – Coaxial wire MAU transmit mask . 218
Figure 82 – Coaxial wire MAU receive mask . 219
Figure 83 – Transformer symbol . 220
Figure 84 – 5 Mbit/s, voltage-mode, coaxial wire topology example . 222
Figure 85 – Coaxial wire medium topology limits . 223
Figure 86 – Coaxial wire medium tap electrical characteristics . 224
Figure 87 – MAU block diagram 5 Mbit/s, optical fiber medium . 227
Figure 88 – NAP reference model . 231
Figure 89 – Example of transient and permanent nodes . 232
Figure 90 – NAP transceiver . 233
Figure 91 – NAP cable . 234
Figure 92 – Circuit diagram of the principle of measuring impedance . 239
Figure 93 – Definition of CMRR . 240
Figure 94 – Block circuit diagram of the principle of measuring CMRR . 240
Figure 95 – Power supply ripple and noise . 243
Figure 96 – Output characteristic curve of a power supply of the category EEx ib . 250
Figure 97 – Output characteristic curve of a power supply of the category EEx ia . 250
Figure 98 – Repeater in linear bus topology . 253
Figure 99 – Repeater in tree topology . 253
Figure 100 – Example for a connector with integrated inductance . 255
Figure 101 – Interconnecting wiring . 255
Figure 102 – Bus terminator . 256
Figure 103 – Linear structure of an intrinsically safe segment . 258
Figure 104 – Topology example extended by repeaters . 259
Figure 105 – Bus terminator . 261
Figure 106 – Waveform of the differential voltage . 262
Figure 107 – Test set-up for the measurement of the idle level for devices with an
integrated termination resistor . 264
Figure 108 – Test set-up for the measurement of the idle level for devices with a
connectable termination resistor . 264
Figure 109 – Test set-up for measurement of the transmission levels . 265
Figure 110 – Test set-up for the measurement of the receiving levels . 265
Figure 111 – Fieldbus model for intrinsic safety . 266
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Figure 112 – Communication device model for intrinsic safety . 266
Figure 113 – Connection to the optical network . 269
Figure 114 – Principle structure of optical networking . 270
Figure 115 – Definition of the standard optical link . 270
Figure 116 – Signal template for the optical transmitter . 275
Figure 117 – Recommended interface circuit . 279
Figure 118 – MAU of an outgoing interface . 280
Figure 119 – MAU of an incoming interface . 281
Figure 120 – Remote bus link . 281
Figure 121 – Interface to the transmission medium . 282
Figure 122 – Wiring . 285
Figure 123 – Terminal resistor network . 285
Figure 124 – Fiber optic remote bus cable . 286
Figure 125 – Optical fiber remote bus link . 286
Figure 126 – Optical wave shape template optical MAU . 288
Figure 127 – Optical transmission line . 294
Figure 128 – Optical signal envelope . 296
Figure 129 – Display of jitter (J ) . 297
noise
Figure 130 – Input-output performance of a slave . 299
Figure 131 – Functions of a master connection . 302
Figure 132 – Valid transmitting signals during the transition from fill signal to telegram
delimiters . 304
Figure 133 – Valid transmitting signals during the transition from telegram delimiter to
fill signal . 305
Figure 134 – Functions of a slave connection . 306
Figure 135 – Network with two slaves . 307
Figure 136 – Minimum interconnecting wiring. 308
Figure 137 – Dedicated cable topology . 309
Figure 138 – T-branch topology . 309
Figure 139 – Communication element isolation . 311
Figure 140 – Communication element and I/O isolation . 311
Figure 141 – Minimum interconnecting wiring. 312
Figure 142 – Flat cable topology . 313
Figure 143 – Dedicated cable topology .
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