Siemens SIMATIC NET PROFIBUS - Manual (Page 42)

Topologies of SIMATIC NET PROFIBUS Networks
2-16
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Infrared
link 1
0.5 to 15 m
Infrared
link 2
0.5 to 15 m
PROFIBUS
slave network segment 1
PROFIBUS
slave network segment 2
Infrared
link 3
0.5 to 15 m
PROFIBUS
slave network segment 3
ILM
ILM
ILM
ILM
Slave
ET 200M
À
Terminating resistor activated
À
Slave
S7-300
Slave
ET 200M
Slave
S7- 300
А
А
А
А
Slave
ET 200M
À
Master OP 25
Master
S7-400
Master
PG/PC/OP
А А
2
2
2
2
2 2
2
2
2
2 LAN cable for PROFIBUS
Slave
ET 200S
Figure 2-10 Point-to-Multipoint Link Using PROFIBUS ILMs (One Master Subnet, Three Subnets with
Slaves)