Siemens RS-485 Manuel utilisateur
RS 485 Repeater
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SIMATIC
RS 485 Repeater
Manual
02/2011
A5E03382072-01
Preface
1
Introduction
2
Description
3
Installation
4
Connecting
5
Technical data
6
Dimension drawings
7
Legal information
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the corresponding information is not taken into
account.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation for the specific task, in particular its warning notices and
safety instructions. Qualified personnel are those who, based on their training and experience, are capable of
identifying risks and avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be adhered to. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this
publication may be trademarks whose use by third parties for their own purposes could violate the rights of the
owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E03382072-01
Ⓟ 03/2011
Copyright © Siemens AG 2011.
Technical data subject to change
RS 485 Repeater
Manual, 02/2011, A5E03382072-01 3
Table of contents
1 Preface ...................................................................................................................................................... 5
2 Introduction................................................................................................................................................ 7
3 Description................................................................................................................................................. 9
3.1 Area of application and properties .................................................................................................9
3.2 Design of the RS 485 repeater ....................................................................................................11
4 Installation ............................................................................................................................................... 13
4.1 Installing and uninstalling the RS 485 repeater ...........................................................................13
5 Connecting .............................................................................................................................................. 17
5.1 RS 485 Repeater in ungrounded and grounded operation..........................................................17
5.2 Connecting the power supply.......................................................................................................20
5.3 Connecting the bus cable ............................................................................................................21
5.4 Configuration options with the RS 485 repeater..........................................................................22
6 Technical data ......................................................................................................................................... 25
6.1 General technical data .................................................................................................................25
6.1.1 Standards and approvals.............................................................................................................25
6.1.2 Electromagnetic Compatibility......................................................................................................30
6.1.3 Shipping and storage conditions for modules and backup batteries ...........................................32
6.1.4 Mechanical and ambient climatic conditions for S7-300 operation..............................................33
6.1.5 Specification of dielectric tests, protection class, degree of protection, and rated voltage
of S7-300......................................................................................................................................35
6.2 Technical data the RS 485 Repeater...........................................................................................36
7 Dimension drawings ................................................................................................................................ 39
7.1 Dimension drawings.....................................................................................................................39
Glossary .................................................................................................................................................. 41
Index........................................................................................................................................................ 45
Table of contents
RS 485 Repeater
4 Manual, 02/2011, A5E03382072-01
RS 485 Repeater
Manual, 02/2011, A5E03382072-01 5
Preface 1
Introduction
This manual describes the RS 485 repeater.
It supports you during the configuration, installation and commissioning. It is intended for
people who work in the following areas: the configuring, commissioning and servicing of
automation systems.
Basic knowledge required
This manual presumes general knowledge in the field of automation engineering.
Range of validity of this manual
The manual is valid for the RS 485 repeater with the order number 6ES7972-0AA02-0XA0.
Additional support
If you have any questions relating to the products described in this product information and
do not find the answers in this document, please contact your local Siemens representative
on the Internet (http://www.automation.siemens.com/partner/).
A guide to the technical documentation provided for the various SIMATIC products and
systems is available on the Internet (http://www.siemens.com/simatic-tech-doku-portal).
The online catalog and ordering systems are available on the Internet
(http://www.siemens.com/automation/mall).
Technical Support
You can contact Technical Support for all Industry Automation products by means of the
Internet Web form for the Support Request on the Internet
(http://www.siemens.com/automation/support-request).
Additional information about Siemens Technical Support is available on the Internet
(http://www.siemens.com/automation/service).
Preface
RS 485 Repeater
6 Manual, 02/2011, A5E03382072-01
Service & Support on the Internet
In addition to our documentation, we offer a comprehensive knowledge base. On the Internet
(http://www.siemens.com/automation/service&support).
There you will find:
● Our Newsletter, which constantly provides you with the latest information about your
products.
● The right documentation for you using our Service & Support search engine.
● The bulletin board, a worldwide knowledge exchange for users and experts.
● Your local contact for Automation & Drives in our contact database.
● Information about on-site services, repairs, spare parts, and lots more.
RS 485 Repeater
Manual, 02/2011, A5E03382072-01 7
Introduction 2
This chapter
This chapter describes the RS 485 repeater in detail.
This includes:
● Description of the RS 485 repeater
● The maximum cable lengths between two RS 485 repeaters
● The functions of the various operating elements and terminals
● Mounting and removing
● information about grounded and nongrounded operation
● Connecting the power supply and bus line
● Technical specifications and the block diagram
● Dimension drawings
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 on the Internet
(http://support.automation.siemens.com/WW/view/en/7915183).
Introduction
RS 485 Repeater
8 Manual, 02/2011, A5E03382072-01
RS 485 Repeater
Manual, 02/2011, A5E03382072-01 9
Description 3
3.1 Area of application and properties
Order number
6ES7972-0AA02-0XA0
What is the RS 485 repeater?
The RS 485 repeater amplifies data signals (amplitude, edge slope and signal width) on bus
lines and couples segments.
Application of the RS 485 Repeater
The RS 485 repeater connects two PROFIBUS or MPI segments using RS 485 technology
with maximum 32 nodes. It enables transfer rates from 9.6 kbps to 12 Mbps.
You need an RS 485 repeater if:
● More than 32 nodes (maximum 127, including repeaters) are connected to the bus
● Segments are operated ungrounded on the bus (electrical isolation of segments)
● The maximum cable length of a bus segment is exceeded (see the table below)
● Help is required during the commissioning
– Switch for disconnecting segments
– Display of bus activity
– Disconnecting a bus segment in the case of incorrectly inserted terminating resistors
● The signals are to be regenerated in amplitude and time
Table 3- 1 Maximum cable length of a bus segment
Transmission rate Max. cable length of a bus segment (in m)
9.6 to 187.5 kbps 1000
500 kbps 400
1.5 Mbps 200
3 to 12 Mbps 100
Description
3.1 Area of application and properties
RS 485 Repeater
10 Manual, 02/2011, A5E03382072-01
Rules
If you set up a PROFIBUS network with RS 485 repeaters:
● The number of RS 485 repeaters in series must be configured in STEP 7.
● Up to nine RS 485 repeaters may be connected in series.
● The maximum cable length between two nodes with RS 485 repeater may not exceed the
values listed in the table below.
Table 3- 2 Maximum cable length between two RS 485 repeaters
Transmission rate Maximum cable length between 2 nodes (in m) with RS 485 repeater
9.6 to 187.5 kbps 10000
500 kbps 4000
1.5 Mbps 2000
3 to 12 Mbps 1000
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