Installation guide

Network Infrastructure for EtherNet/IP™
vii
7.1.3 Fiber-Optic Connectors..................................................................................................................... 7-82
7.2 Cabling Considerations: Twisted-Pair vs. Fiber-Optic Cable.................................................................. 7-83
7.2.1 When to Use Shielded Twisted-Pair Cabling.................................................................................... 7-83
7.2.2 Terminating Copper Cable................................................................................................................ 7-84
7.2.3 When to Use Fiber-Optic Cabling..................................................................................................... 7-85
7.2.4 Types of Optical Fiber....................................................................................................................... 7-85
7.2.5 Bend Radius / Pull Force of Fiber ..................................................................................................... 7-85
7.2.6 Terminating Fiber-Optic Cable ......................................................................................................... 7-86
7.3 Key Switch Selection Issues.................................................................................................................... 7-86
7.3.1 Address Table Size Limits Control Device Quantity ........................................................................ 7-87
7.3.2 Auto-negotiation vs. Manual Setting of Switched Port Data Rates................................................... 7-87
7.3.3 Multicast Messaging Handling Option.............................................................................................. 7-87
7.3.4 Quality of Service Options................................................................................................................ 7-87
7.3.5 Security Options................................................................................................................................ 7-87
7.3.6 Broadcast or Multicast Threshold Filters .......................................................................................... 7-88
7.3.7 Additional Functions......................................................................................................................... 7-88
7.4 Distributed Enclosures and Environmental Considerations..................................................................... 7-88
7.4.1 Environmental Specification Considerations .................................................................................... 7-88
7.4.2 Temperature ...................................................................................................................................... 7-88
7.4.3 Electrical noise.................................................................................................................................. 7-89
7.4.4 Shock and Vibration.......................................................................................................................... 7-89
7.4.4.1 Certifications .................................................................................................................................. 7-89
Appendix A Recommendations for Ethernet Switches in EtherNet/IP Systems ...........................A-1
Personnel for System Start-Up and Maintenance.................................................................................................. A-1
Isolated Systems: Small Scale............................................................................................................................... A-2
Isolated Systems: General Use .............................................................................................................................. A-2
Large-scale Control and Enterprise Networking ................................................................................................... A-4
Summary ............................................................................................................................................................... A-7
Appendix B Overview of the OSI Model, EtherNet/IP and CIP.....................................................B-1
Characteristics of the OSI Layers...........................................................................................................................B-1
Communication between Systems..........................................................................................................................B-2
OSI Layer Services..............................................................................................................................................B-3
OSI Model Layers and Information Exchange.......................................................................................................B-3
Information Exchange Process............................................................................................................................B-4
Physical Layer.....................................................................................................................................................B-5
Data Link Layer ..................................................................................................................................................B-5
Network Layer ....................................................................................................................................................B-6
Transport Layer...................................................................................................................................................B-6
Appendix C EtherNet/IP and International Standards ...................................................................C-1
Internet and Ethernet Standards..............................................................................................................................C-1
Protocols and Profiles.............................................................................................................................................C-1
Electronic Data Sheets (EDS).................................................................................................................................C-2
Appendix D Glossary of Terms..........................................................................................................D-1
Appendix E Ingress Protection (IP) Codes........................................................................................E-1