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Glossary
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
142 C79000-G8976-C186-03
Redundancy manager
(RM)
Switch in a ring topology that does not forward any frames between its
ring ports if there are functioning connections between all other
switches. As soon as a connection between two switches is inter-
rupted, the redundancy manager forwards frames between its ring
ports and so restores an intact connection between all switches.
Ring port
Two ports in a switch via which it is connected with other switches to
form a ring. One switch must be configured as the redundancy man-
ager in the ring. This sends test frames via the ring ports that are for-
warded by all the ring ports of the other switches in the ring. This
makes sure that the ring does not have any interruptions.
Segment
In the Ethernet bus system, transceivers connected together over the
bus cable along with the nodes connected over patch cables form a
segment. Several such segments can be connected via repeaters.
When using twisted pair and fiber-optic cables, each subsection forms
a segment.
Signaling Contact
Floating relay contact via which the detected error states can be sig-
naled.
Single mode
In single mode transmission, the pulse is transmitted by a straight
mode (wave). Attenuation is mainly caused by physical absorption and
dispersion as well as by mechanical bending. The amount of attenua-
tion depends among other things on the wavelength of the input light.
Single mode fiber-optic cables have an outer diameter of 125 µm and 9
or 10 µm core diameter. The smaller core diameter degrades the pulse
edges less than multimode transmission and allows greater transmis-
sion distances.
SNMP
Simple Network Management Protocol. Standardized protocol for
transporting network management information.
Spanning Tree
The Spanning Tree protocol (STP) allows redundant transmission
paths. This prevents circulating frames and, if a fault develops, pro-
vides an alternative path within 20 - 30 seconds (reconfiguration time).
- Trademarks 3
- 6 C79000-G8976-C186-03 6
- Preface 7
- Further Documentation 8
- Standards and Approvals 8
- Contents 9
- C79000-G8976-C186-03 10
- Introduction to 11
- Industrial Ethernet Switches 11
- 1.2 Topologies 13
- Electrical Ring 14
- Optical Ring 14
- Configuration Example 15
- 1.2.2 Star Structure 16
- 1.2.3 Line Structure 18
- SCALANCE X-400 21
- M M 4 9 2 - 2 23
- F O 2 x 1 0 0 0 23
- 2.2 Ports of SCALANCE X-400 24
- Transmission medium 25
- Transmission range 25
- Connectors 25
- 2.2.2 1000Base-TX 26
- 2.2.3 100Base-FX 27
- Transmission Range 28
- 2.2.4 1000Base-SX 29
- 2.2.5 1000Base-LX 30
- Compatibility List 31
- 32 C79000-G8976-C186-03 32
- Overview 33
- Components of the Product 35
- Signaling Contact 40
- DI Module 41
- Serial Port 43
- Ethernet Port 43
- Area of Application 44
- How It Works 44
- Diagnostics 45
- Startup Behavior 46
- 4.1 Media Modules 49
- Options for Slot 5 50
- Options for Slots 6 and 7 50
- Properties 51
- Connector 51
- 4.2 Covers, Dummy Cover 55
- CV490 2x1000 56
- Displays of the Cover 56
- CV490 2x100 57
- CV490 4x100 58
- Slot of the Dummy Cover 59
- Displays of the Dummy Cover 59
- 60 C79000-G8976-C186-03 60
- Extender Modules 61
- 66 C79000-G8976-C186-03 66
- Installing on an S7-300 Rail 68
- Dummy Cover 72
- Removing a Media Module 73
- Variants of the Covers 74
- Fitting a Cover 74
- Removing a Cover 74
- Fitting a Dummy Cover 75
- Removing a Dummy Cover 75
- Specifying the Slot Number 88
- Applying the Slot Numbers 88
- 6.5 Factory Defaults 89
- 6.6 Ports 90
- I N 3I N 4 92
- I N 5I N 8 I N 7 M 5 I N 6 93
- X 4 1 4 - 3 E 94
- 96 C79000-G8976-C186-03 96
- 6.7 Operator Controls 101
- Ring Ports in Slots 5 to 7 103
- R1 and R2 are set to OFF 104
- 6.8 LED Display 106
- Display Modes A through C 109
- Display in Display Mode D 110
- I N 1 / I N 5 111
- Display Modes A through D 112
- Port Statuses in DMode A 113
- Port Statuses in DMode B 114
- Port Statuses in DMode C 115
- Port Statuses in DMode D 116
- 6.9 Replacing the C-PLUG 117
- 6.10 Show Location 118
- Technical Specifications 119
- 122 C79000-G8976-C186-03 122
- 7.6 Extender Module EM495-8 127
- 1 0 7 , 5 128
- 1 0 9 , 5 128
- 1 1 2 , 4 128
- 7.7 Extender Module EM496-4 129
- Approvals, Certificates 131
- EMC Directive 132
- Required FDA and IEC labels 132
- Directive on Machines 133
- Installation Guidelines 133
- Note for Australia 134
- FM Approval 136
- ATEX Approval 136
- Certification 137
- 138 C79000-G8976-C186-03 138
- Glossary 139
- A&D Technical Support 147
- Nuernberg 147
- Johnson City 147
- A&D Technical Support 148
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