IEC 61158-2:2010

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

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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
– 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

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

– 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

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

– 6 – 61158-2  IEC:2010
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

61158-2  IEC:2010 – 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 . 331
Figure D.3 – Example of mixture between wire and optical media for a 31,25 kbit/s bit
rate . 333
Figure D.4 – Example of mixture between wire and optical media . 334
Figure F.1 – Pin connector for short range optical medium . 337
Figure F.2 – Crimp ring for short range optical medium . 337
Figure G.1 – PhL repeater device reference model . 339
Figure G.2 – Reference model for redundancy . 342
Figure G.3 – Block diagram showing redundant coaxial medium and NAP . 343
Figure G.4 – Block diagram showing ring repeaters . 344
Figure G.5 – Segmentation query . 345
Figure G.6 – Segmentation response . 345
Figure G.7 – Main switch state machine . 347
Figure G.8 – Port 1 sees network activity first . 348
Figure G.9 – Port 2 sees network activity first . 349
Figure H.1 – Coaxial wire MAU RXDATA detector . 351
Figure H.2 – Coaxial wire MAU RXCARRIER detection . 352
Figure H.3 – Redundant coaxial wire MAU transceiver . 352
Figure H.4 – Single channel coaxial wire MAU transceiver . 353
Figure H.5 – Coaxial wire medium tap . 354
Figure H.6 – Non-isolated NAP transceiver . 355
Figure H.7 – Isolated NAP transceiver . 355
Figure I.1 – Schematic of the station coupler . 356
Figure I.2 – Pin assignment of the male and female connectors IEC 60947-5-2
(A coding) . 357
Figure I.3 – Connector pinout, front view of male and back view of female respectively . 358
Figure I.4 – Connector pinout, front view of female M12 connector . 360
Figure I.5 – Connector pinout, front view of male M12 connector . 360
Figure I.6 – M12 Tee . 361
Figure I.7 – M12 Bus termination . 362
Figure J.1 – Redundancy of PhL MAU and Medium . 363

– 8 – 61158-2  IEC:2010
Figure K.1 – Optical MAU in a network with echo . 364
Figure K.2 – Optical MAU in a network without echo . 365
Figure K.3 – Optical MAU with echo via internal electrical feedback of the receive
signal . 365
Figure K.4 – Optical MAU without echo function . 365
Figure K.5 – Optical network with star topology . 366
Figure K.6 – Optical network with ring topology . 367
Figure K.7 – Optical network with bus topology . 367
Figure K.8 – Tree structure built from a combination of star structures . 368
Figure K.9 – Application example for an ANSI TIA/EIA-485-A / fiber optic converter . 368
Figure L.1 – Bus termination integrated in the communication device . 373
Figure L.2 – Bus termination in the connector . 374
Figure L.3 – External bus termination. 374
Figure M.1 – Outgoing interface 9-position female subminiature D connector at the
device . 375
Figure M.2 – Incoming interface 9-position male subminiature D connector at the
device . 375
Figure M.3 – Terminal connector at the device . 375
Figure M.4 – Ferrule of an optical F-SMA connector for polymer optical fiber
(980/1 000 µm) . 376
Figure M.5 – Type 8 fiber optic hybrid connector housing . 377
Figure M.6 – Type 8 fiber optic hybrid connector assignment . 378
Figure O.1 – Topology . 381
Figure O.2 – Structure of a single-core cable (example) . 384
Figure O.3 – Optical power levels . 385
Figure P.1 – Example of an implemented DPLL . 387
Figure P.2 – DPLL status diagram . 388
Figure P.3 – DPLL timing . 388
Figure Q.1 – PhL-P device connector r-a . 390
Figure Q.2 – PhL-P device connector straight . 391
Figure Q.3 – PhL-P flat cable connector and terminal cover – body and connector . 391
Figure Q.4 – PhL-P flat cable connector and terminal cover – terminal cover . 392
Figure Q.5 – Type 18-PhL-P round cable connector body . 392
Figure Q.6 – Type 18-PhL-P round cable connector terminal cover . 393
Figure Q.7 – Type 18-PhL-P round cable alternate connector and body . 393
Figure Q.8 – Type 18-PhL-P round cable alternate connector terminal cover . 394
Figure R.1 – PhL-B cable cross section twisted drain . 395
Figure R.2 – PhL-B cable cross section non-twisted drain . 396
Figure R.3 – PhL-P flat cable cross section - with key . 397
Figure R.4 – PhL-P flat cable cross section - without key . 397
Figure R.5 – PhL-P flat cable polarity marking . 397
Figure R.6 – Round cable – preferred; cross section . 398
Figure R.7 – Round cable – alternate; cross-section . 398

61158-2  IEC:2010 – 9 –
Table 1 – Data encoding rules . 60
Table 2 – Ph-STATUS indication truth table . 61
Table 3 – Jabber indications . 61
Table 4 – Parameter names and values for Ph-SET-VALUE request . 78
Table 5 – Parameter names for Ph-EVENT indication . 79
Table 6 – Summary of Ph-management services and primitives . 80
Table 7 – Reset primitives and parameters . 81
Table 8 – Values of PhM-Status for the Reset service . 81
Table 9 – Set value primitives and parameters . 82
Table 10 – Mandatory PhE-variables . 82
Table 11 – Permissible values of PhE-variables . 83
Table 12 – Values of PhM-Status for the set-value service . 83
Table 13 – Get value primitives and parameters . 83
Table 14 – Current values of PhE-variables . 84
Table 15 – Values of PhM-Status for the get value service . 84
Table 16 – Event primitive and parameters . 84
Table 17 – New values of PhE-variables . 85
Table 18 – Parameter names and values for management . 85
Table 19 – PH-RESET . 87
Table 20 – Ph-SET-VALUE . 87
Table 21 – PhL variables . 88
Table 22 – Ph-GET-VALUE . 89
Table 23 – Ph-EVENT . 90
Table 24 – PhL events . 90
Table 25 – Parameter names and values for Ph-SET-VALUE request. 91
Table 26 – Signals at DTE – DCE interface . 95
Table 27 – Signal levels for an exposed DTE – DCE interface . 96
Table 28 – MDS bus reset . 106
Table 29 – Signals at the MIS-MD
...