Siemens Automation System S7-400 User Manual
Page 115
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Networking
5-17
Automation System S7-400 Hardware and Installation
A5E00850741-01
Example
The figure below shows a possible configuration of an MPI network. This example
clarifies the maximum possible distances in an MPI network.
max. 50m
max. 50m
max.
1000m
RS 485-
repeater
RS 485-
repeater
{
{
{
{
{
{
S7-400
S7-400
S7-400
S7-400
S7-400
Spur line
0
11
7
8
9
10
3
4
5
6
OP
PG*
OP
OP
Programming device connected via spur line for maintenance
{
Terminating resistor switched on
0 ... x MPI addresses of nodes
Programming
device*
Figure 5-10 Configuration of an MPI network
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