Siemens S7-400 installation manual Methods of Expansion and Networking, Distributed I/Os

Installing the S7-400

2.15Methods of Expansion and Networking

Introduction

Apart from the structures mentioned in this chapter, other expansions are possible, for example, by connecting distributed I/Os or by networking.

Distributed I/Os

When an S7-400 is configured with a distributed I/O system, the inputs/outputs operate in a distributed local arrangement and are directly connected via PROFIBUS DP to a CPU.

One of the master-capable CPUs of the S7-400 is used.

You can use the following devices, for example, as slaves, i.e. as local inputs/outputs:

•ET 200M

•ET 200S

•ET 200X

•ET 200eco

•All DP standard slaves

Networking

You may connect your S7-400 to various subnets:

•via Simatic Net CP Ethernet to an Industrial Ethernet subnet

•via Simatic Net CP Profibus to a Profibus DP subnet

•via the integrated MPI interface to an MPI subnet

•via the integrated Profibus DP interface to a PROFIBUS DP subnet See Chapter 5 for further details.

2-34	Automation System S7-400	Hardware and Installation
		A5E00850741-01