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Glossary
Glossary-3
SIMATIC NET Twisted-Pair and Fiber-Optic Networks
C79000-G8976-C125-02
Chassis ground
Chassis ground includes all the interconnected inactive parts of equipment that
must not have a hazardous voltage even in the event of a fault.
Collision domain
To ensure that the CSMA/CD protocol functions correctly, the propagation time of
a data packet from one node to another is restricted.
This propagation time results in a specially limited span for the network
depending on the data rate known as the collision domain. In 10 Mbps Ethernet,
this is 4520 m and in Fast Ethernet it is 412 m.
Several collision domains can be connected together using bridges/switches.
CSMA/CD
Carrier Sense Multiple Access / Collision Detection
Ethernet medium access procedure
D.C. loop resistance
Total resistance of the outward and return line of a cable.
Delay equivalent
The delay equivalent describes the signal delay of a network component in the
signal path. The value of the signal delay is specified in meters instead of
seconds.
The value in meters corresponds to the distance that a signal could propagate
within the time if the signal propagated through a cable rather than passing
through the component.
Electromagnetic compatibility
Electromagnetic compatibility (EMC) deals with all questions of electrical,
magnetic and electromagnetic emission and immunity and the functional
disturbances in electrical devices resulting from these effects.
FDX
–> Full duplex
Fiber-optic cable (FO)
A fiber-optic cable is a transmission medium in an optical network. Only
multimode glass fiber-optic cables are suitable for connecting optical Industrial
Ethernet components.
- C79000–G8976–C125–02 1
- Trademarks 2
- Qualified Personnel 3
- General Information 9
- 1.1 Symbols 10
- Industrial Ethernet Networks 15
- IEEE Standard 802.3 17
- Baseband Signaling 17
- Collision Domain 18
- 2.2 Industrial Ethernet 19
- 2.3 Fast Ethernet 20
- Fiber Optic (100BASE-FX) 21
- 2.4 Switching 22
- Configuring Networks 27
- 3.1.1 Fiber-Optic Links 28
- Optical Power Loss 29
- 3.1.3 AUI Links 31
- Optical Link Module (OLM) 33
- Electrical Link Module (ELM) 33
- Optical Star Coupler Cards 34
- Electrical Star Coupler Cards 34
- 3.2.2 Bus Structure 37
- Example: 40
- Checking the example: 41
- Configuration Rule 43
- Note on OLM Version 1: 44
- Components 45
- 3.3 Switched LANs 49
- 3.4.1 Twisted-Pair Links 50
- 3.4.2 ESM Bus Structure 51
- 3.5.1 Fiber-Optic Links 53
- 3.5.2 OSM Bus Structure 55
- Redundant Optical Ring 56
- Standby-Sync Port 57
- Synchronization Cable 57
- Networks 59
- ITP (Sub-D Connectors) 60
- FC Twisted-Pair 60
- Guidelines for Laying Cables 60
- Structured Cabling 61
- Maximum Cable Lengths 62
- Shielding 63
- Labeling 63
- Notes on Installation 66
- Versions Available 66
- Ordering Data 72
- 4.4 Twisted -Pair Cord 73
- Twisted-Pair (TP) Cables 77
- Product Range 79
- Areas of Application 84
- Mounting Bracket 90
- 4.7 RJ-45 Connector 95
- Installation 97
- Example of an Application 97
- C79000-G8976-C125-02 100
- Chapter Overview 101
- Fiber-Optic Cables (FO) 102
- Advantages 102
- Point-to-Point Link 102
- 5.2 Glass Fiber-Optic Cables 103
- Technical Specifications 104
- Properties 107
- Application 107
- 5.2.5 Special Cables 114
- Fitting Connectors on Site 115
- Preassembled Cables 115
- Overview 119
- 6.1.2 I nstallation 121
- 6.1.3.1 General Functions 121
- Handling Collisions 122
- Auto Partitioning 122
- Reconnection 122
- Jabber Lockup Protection 123
- Link Control 123
- Auto Polarity Exchange 123
- 6.1.4 Topologies 124
- 6.1.4.1 Bus Structure 125
- OLM OLMOLM OLM 126
- 6.2.1 Application 127
- 6.2.2 Design 128
- 6.2.3 Functions 129
- Fast Redundancy in the Ring 130
- Redundant Linking of Networks 130
- Variants of the O SM 131
- Variants of the ESM 131
- Bus Structure 131
- Figure6-7 BuswithOSMs 132
- Figure 6-8 Bus with ESMs 132
- ESM ITP 80 134
- Network Expansion 135
- Structure of a Redundant Link 136
- How Standby Redundancy Works 137
- Accessories 137
- Functions 138
- Remote Monitoring 138
- 6.3 ASGE Active Star Coupler 140
- 6.4.1 Overview 142
- 6.4.3 Functions 143
- 1. TP cord 9/RJ-45 144
- 2. ITP XP standard cable 9/9 144
- 3. Fiber-optic cable (FO) 144
- 6.5.1 Overview 145
- 6.5.3 Functions 146
- Mini UTDE RJ-45 147
- Bus (LAN) Cables in Plants 150
- Twisted-Pair Signal Level 151
- Operation with 24 V DC 151
- Operation with Live Voltage 151
- Cabling Components 151
- Aims of Bonding 155
- Troubleshooting 158
- Shielding Cables 161
- Handling Bus Cable Shields 162
- Establishing Shield Contact 163
- Cabinet Lighting 165
- 6.4.4.2) 166
- Fiber-Optic Cables 167
- Cable Groups 167
- Conditions 167
- 7.4.3 Cabling within Closets 169
- Using Fiber-Optic Cables 170
- Redundant Bus Cables 172
- Install Bus Cables Separately 172
- 7.7 Installing LAN Cables 174
- 9-Pin Sub-D Connector 177
- Fitting the Connector 178
- 15-Pin Sub-D Connector 180
- Fitting Connectors 181
- Braided shield 182
- Shield foil 182
- BFOC Connectors 187
- Cubicles 189
- 8.1 IP Degrees of Protection 190
- Degree of Protection 191
- 8.2 SIMATIC NET Components 192
- Standards 193
- Further Literature 193
- Dimension Drawings 195
- OSM ITP62-LD, ITP53 197
- Side View of the OSM 199
- (side view) 202
- 9.4 ASGE Active Star Coupler 203
- 9.5 Optical Transceiver 204
- 9.7 Connectors 205
- 15-pin Sub-D Connector 206
- RJ-45 Connector 207
- Tilting/ 209
- IE FC Outlet RJ-45 209
- References 211
- Systems: 214
- Training Center 218
- Further Support 218
- Ordering Special Cables 219
- Staff qualification 222
- Safety guidelines 223
- 1. Functional description 223
- 2. Configuration 224
- 4. Further support 225
- 5. Technical data 226
- SIMATIC NET 227
- Industrial Ethernet 227
- The Package 229
- Installing an OSM/ESM 229
- Further Documentation 230
- Finding Information 230
- Guide to the Manual 230
- Audience 230
- Standards and Approvals 231
- Recycling and Disposal 231
- Documentation Feedback 231
- Industrial Ethernet OSM/ESM 232
- C79000-Z8976-C068-04 232
- Contents 233
- Introduction 235
- 1.1.1 OSM ITP62 237
- 1.1.2 OSM ITP62-LD 239
- 1.1.3 OSM ITP53 241
- 1.1.4 ESM ITP80 242
- 1.1.5 OSM TP62 243
- 1.1.6 ESM TP80 245
- Learning Addresses 248
- Deleting Addresses 248
- 3.1 Bus Structure 252
- Figure 8: Bus with ESMs 253
- 3.2 Redundant Ring Structure 254
- 1 Fibre-optic (FO) 257
- 2 ITP XP standard cable 257
- Ring 1 (OSM ring) 257
- Ring 3 (OLM ring) 257
- Ring 2 (ESM ring) 257
- Compatibility 260
- 1 Fiber-optic cable (FO) 261
- Redundant Coupling of Rings 262
- 4.1 ITP/TP Ports 268
- 4.1.2 TP Ports 269
- Auto-negotiation Mode 270
- 4.1.4 FO Ports 271
- 4.1.5 Standby Sync Port 272
- 4.1.6 Serial Interface 273
- Power Supply 274
- Signaling Contact 275
- In the RM Mode (additional) 275
- Sync Port: 275
- OSM/ESM in the Standby Mode: 275
- 4.2.1 LED "Status" 276
- 4.2.2 LED "Power" 278
- 4.2.3 Port LEDs 279
- LED on LED on 280
- 4.2.4 Operator Controls 281
- Maintenance 283
- 5.2 Installation 285
- Standard Rail Mounting 286
- Removing from a Standard Rail 287
- Wall Mounting 290
- 5.3 Cleaning 292
- 5.4 Maintenance 293
- Firmware Update 295
- Preparations 296
- SIMATIC Training Center 309
- Notes on the CE Mark 311
- Declaration of Conformity 312
- Glossary 313
- Bus segment 320
- Bus system 320
- Grounding 322
- Suppressor 326
- Terminating resistor 326
- Glossary-10 328
- Abbreviations 329
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