Name: Siemens SIMATIC S7-300 Module data
Brand: Siemens
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7-1

Programmable Logic Controllers S7-300 Module Data

A5E00105505-03

RS 485 Repeater

In this chapter

In this chapter, you will find a detailed description of the RS 485-Repeater.

Included in the description are:

• The purpose of the RS 485 repeater

• The maximum cable lengths possible between two RS 485 repeaters

• The functions of the individual operating elements and terminals

• Information about grounded and non-grounded operation

• Technical specifications and the block diagram

Further information

You will find further information on the RS 485 repeater in the manuals Hardware

and Installation in the Chapter “Configuring of an MPI or PROFIBUS-DP network”.

Diagnostic repeater

Compared to the RS 485 repeater, the diagnostic repeater has new characteristics:

Diagnostic function and modeling as the DP slave. For additional information, refer

to the Diagnostic Repeater for PROFIBUS-DP manual, order no.

6ES7972-0AB00-8xA0.

In this chapter

Section Contents Page

7.1 Application and Characteristics;

(6ES7972-0AA01-0XA0)

7-2

7.2 Appearance of the RS-485 Repeater; (6ES7972-0AA01-0XA0) 7-3

7.3 RS 485 Repeater in Ungrounded and Grounded Operation 7-4

7.4 Technical Specification 7-6

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