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Siemens Automation System S7-400 User Manual

Page 108

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Networking

5-10

Automation System S7-400 Hardware and Installation

A5E00850741-01

Example: Terminating Resistor in the MPI Network

The figure below shows where you have to connect the terminating resistor in a
possible configuration for an MPI network.

RS 485

repeater

{

{

{

{

Terminating resistor switch on

S7-400

S7-400

S7-400

Spur line

S7-300



OP

OP

PG

Programming device

Figure 5-5 Terminating resistor on MPI network