3.1 Line topology
9
3 Network Topologies
Version 1.0 8/00
3 Network Topologies
The following network topologies can be realized with the PROFIBUS OLM:
Point-to-point connections
Line topologies
Star topologies
Redundant optical rings
Combinations of these basic types are also possible. Lines with two optical fibers are used to create the fiber links for
these network topologies.
If a malfunction – e.g. a break in a fiber line – makes a high degree of field bus network fail-safety necessary, the
availability of the network can be increased using a redundant network configuration.
Please note:
Single terminals or entire PROFIBUS segments with max. 31 subscribers can be connected to the electrical
interface of the PROFIBUS OLM.
In areas with a high EMC incidence, only lay optical fiber lines in order to exclude the possibility of EMC
affecting the whole network.
Optically only
OLMs of the same type
can be connected together:
– OLM/P11 with OLM/P12
– OLM/G11 with OLM/G12 and OLM/G12 EEC
– OLM/G11-1300 with OLM/G12-1300
Optical ports which are connected by optical fiber must be set to the same operating mode.
Junctions between different OLM types are only possible via the RS485 interface.
OLM/G12-EEC can be used everywhere in those network topologies described below in which a OLM/G12 can
also be used.
3.1 Line topology
Fig. 2: Network structure in an optical line topology
CH 2
T
R
CH 2
T
R
CH 3
T
R
OLM/P1
1
OLM/G1
1
(-1300)
OLM/P1
2
OLM/G1
2
(-1300)
CH 1
CH 1
Terminal unit /
bus segment
CH 2
T
R
OLM/P1
1
OLM/G1
1
(-1300)
CH 1
Terminal unit /
bus segment
Terminal unit /
bus segment
CH 2
T
R
CH 3
T
R
OLM/P1
2
OLM/G1
2
(-1300)
CH 1
Terminal unit /
bus segment
RS 485 bus line
Optical fiber
Summary of Contents for SIMATIC NET PROFIBUS
Page 10: ...Contents viii PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 11: ...PROFIBUS NETWORKS 1 ...
Page 26: ...PROFIBUS NETWORKS 1 16 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 241: ...A 1 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 Testing PROFIBUS A ...
Page 254: ...Testing PROFIBUS A 14 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 288: ...Installing LAN Cables C 26 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 325: ...F 1 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 Dimension Drawings F ...
Page 338: ...Dimension Drawings F 14 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 396: ...Infrared Link Modul ILM 6ZB530 3AC30 0BA1 54 Copyright by Siemens ...
Page 434: ......
Page 438: ...Contents ii PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 Contents ...
Page 450: ...Network Topology 4 4 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 458: ...Installation and Startup 5 8 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 460: ...Troubleshooting 6 2 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 464: ...Technical Specifications 7 4 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 468: ...References 9 2 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 470: ...Abbreviations 10 2 PROFIBUS Optical Bus Terminal OBT C79000 G8976 C122 02 ...
Page 478: ...References I 4 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...
Page 488: ...Glossary Glossary 8 PROFIBUS Networks SIMATIC NET 6GK1970 5CA20 0AA1 Release 2 05 2000 ...