Siemens SIMATIC S7-400 Hardware And Installation Manual page 121

Example of an MPI Network
S7-400**
OP**
2 1
S7-400
11
0
Programming device*
* Only connected via spur line for startup/maintenance (with default MPI address)
** Connected to the MPI network later on (with default MPI address)
0 to x MPI addresses of nodes
Terminating resistor switched on
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
www.gkbpx.com
S7-400 S7-400
3 4
S7-300
OP
10 9
Networking
Programming
S7-400
device
5 6
S7-400
OP
8 7
5-11