Siemens S7-400 installation manual Configuration of an MPI network

Networking

Example

The figure below shows a possible configuration of an MPI network. This example clarifies the maximum possible distances in an MPI network.

S7-400			S7-400	S7-400	Programming	{
		OP			device*	RS 485-
						repeater
{	3	4	5	6	7	{

PG*	Spur line
	
	0
max. 50m
S7-400	S7-400	{

OP		OP		RS 485-
				repeater
11	10	9	8	{
{

max.

1000m

max. 50m

{Terminating resistor switched on

Programming device connected via spur line for maintenance 0 ... x MPI addresses of nodes

Figure 5-10 Configuration of an MPI network

Automation System S7-400	Hardware and Installation	5-17
A5E00850741-01