Topologies of SIMATIC NET PROFIBUS Networks
2-12
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Alternative Cabling Strategy
If the distance between two OLMs turns out to be too long, a structure as shown in
Figure 2-6 can be implemented.
OP 25
S7-400
PG
OP 25
ET 200M
PG/PC/OP
S7-400
PG
ET 200M
PG/PC/OP
1 FO cable
2 LAN cable for PROFIBUS
3 PROFIBUS 830-1T connecting cable
4 PROFIBUS 830-2 connecting cable
2
3
4
4
4
4
4
4
2
3
1
1
1
1
1
1
1
1
1
1
Terminating resistor activated
1
1
Figure 2-6 Alternative Cabling of a Network Structure in an Optical Two-Fiber Ring Topology
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