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Siemens SIMATIC NET PROFIBUS manual Alternative Cabling Strategy

Models: SIMATIC NET PROFIBUS

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Topologies of SIMATIC NET PROFIBUS Networks

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.

ET 200M

À

4

À

OP 25

À

4

À

PG/PC/OP

À

2

À

ÀPG

3

À

S7-400

À

4

À

1

1

1

1

1

 

 

 

ET 200M

À

4

À

OP 25

 

PG/PC/OP

À

À

À PG

4

2

3

À

À

À

S7-400

À

4

À

1

1

 

1

1

1

1

1

ÀTerminating resistor activated

1

FO cable

3

PROFIBUS 830-1T connecting cable

2

LAN cable for PROFIBUS

4

PROFIBUS 830-2 connecting cable

Figure 2-6 Alternative Cabling of a Network Structure in an Optical Two-Fiber Ring Topology

2-12

PROFIBUS Networks SIMATIC NET

6GK1970-5CA20-0AA1 Release 2 05/2000

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Page 38
Image 38
Siemens SIMATIC NET PROFIBUS manual Alternative Cabling Strategy
Page 37 Page 39