Siemens Simatic S7-400 - Manual (Page 421)

10-1
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
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”.
Chapter Overview
Section Description Page
10.1 Application and Characteristics;
(6ES7972-0AA01-0XA0) 10-2
10.2 Appearance of the RS-485 Repeater; (6ES7972-0AA01-0XA0) 10-3
10.3 RS 485 Repeater in Ungrounded and Grounded Operation 10-4
10.4 Technical Specifications 10-6
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