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Siemens SIMATIC RS 485 Manual

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RS 485 Repeater

SIMATIC
RS 485 Repeater
Manual
02/2011
A5E03382072-01

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Preface
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Introduction
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Description
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Installation
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Connecting
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Technical data
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Dimension drawings
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4
5
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Summary of Contents for Siemens SIMATIC RS 485

  • Page 1 ___________________ RS 485 Repeater Preface ___________________ Introduction ___________________ Description SIMATIC ___________________ Installation ___________________ RS 485 Repeater Connecting ___________________ Technical data Manual ___________________ Dimension drawings 02/2011 A5E03382072-01...
  • Page 2 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.

  • Page 3: Table Of Contents

    Table of contents Preface ..............................5 Introduction..............................7 Description..............................9 Area of application and properties ....................9 Design of the RS 485 repeater ....................11 Installation ............................... 13 Installing and uninstalling the RS 485 repeater ................13 Connecting .............................. 17 RS 485 Repeater in ungrounded and grounded operation............17 Connecting the power supply.......................20 Connecting the bus cable ......................21 Configuration options with the RS 485 repeater ................22...
  • Page 4 Table of contents RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 5: Preface

    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).
  • Page 6 Preface 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.

  • Page 7: Introduction

    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). RS 485 Repeater Manual, 02/2011, A5E03382072-01...
  • Page 8 Introduction RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 9: Description

    Description 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.
  • Page 10 Description 3.1 Area of application and properties 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. ●...

  • Page 11: Design Of The Rs 485 Repeater

    Description 3.2 Design of the RS 485 repeater Design of the RS 485 repeater The following table shows the design and functions of the RS 485 repeater. Table 3- 3 Design and functions of the RS 485 repeater Design of the repeater Function ①...
  • Page 12 Description 3.2 Design of the RS 485 repeater RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 13: Installation

    Installation Installing and uninstalling the RS 485 repeater Overview You can install the RS 485 repeater as follows: ● On an S7-300 mounting rail ● On a standard mounting rail (order number 6ES5710-8MA..) Installation on an S7-300 mounting rail To install the RS 485 repeater on an S7-300 mounting rail, the catch on the rear of the RS 485 repeater must first be removed (see the following figure): 1.
  • Page 14 Installation 4.1 Installing and uninstalling the RS 485 repeater 5. Push it towards the back as far as it will go (5). 6. Tighten the securing screw with a torque of 80 to 110 Ncm (6). Rear: Front: 80 to 110 Ncm Figure 4-1 Installing the RS 485 repeater on an S7-300 mounting rail Removing the repeater from an S7-300 mounting rail...
  • Page 15 Installation 4.1 Installing and uninstalling the RS 485 repeater Installation on a standard mounting rail To be able to install the repeater on a standard mounting rail, the catch must be present on the rear of the RS 485 repeater: 1.
  • Page 16 Installation 4.1 Installing and uninstalling the RS 485 repeater RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 17: Connecting

    Connecting RS 485 Repeater in ungrounded and grounded operation Grounded or ungrounded The RS 485 repeater is ● Grounded, if all other nodes on the bus segment are also operated on ground potential ● Ungrounded, if all other nodes in the bus segment are operated on ungrounded potential Note Bus segment 1 is referenced to ground if you connect a PG to the PG/OP socket of the RS 485 repeater.
  • Page 18 Connecting 5.1 RS 485 Repeater in ungrounded and grounded operation Wiring diagram In a repeater configuration with ungrounded reference potential (ungrounded operation), any interference currents and static charges are discharged to the protective conductor by means of an RC network integrated in the repeater (refer to the figure below). ①...
  • Page 19 Connecting 5.1 RS 485 Repeater in ungrounded and grounded operation Electrical isolation between bus segments Bus segments 1 and 2 are electrically isolated. The PG/OP interface is connected internally to the port for bus segment 1. The figure below shows the front panel of the RS 485 repeater.

  • Page 20: Connecting The Power Supply

    Connecting 5.2 Connecting the power supply Amplification of bus signals The amplification of the bus signals takes place between the port for bus segment 1 or the PG/OP interface and the port for bus segment 2. Connecting the power supply Cable type To connect the 24 V DC power supply, use flexible cables with a cross section of 0.25 mm to 2.5 mm...

  • Page 21: Connecting The Bus Cable

    You can also find the stripping length printed on the RS 485 repeater: SIMATIC NET PROFIBUS cables You can find an overview of the PROFIBUS cables and their mechanical and electrical properties in the PROFIBUS system manual on the Internet (http://support.automation.siemens.com/WW/view/en/35222591). RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 22: Configuration Options With The Rs 485 Repeater

    Connecting 5.4 Configuration options with the RS 485 repeater Configuration options with the RS 485 repeater Overview The following section explains the configurations in which you can use the RS 485 repeater: ● Bus segment 1 and bus segment 2 terminated on the RS 485 repeater. ●...
  • Page 23 Connecting 5.4 Configuration options with the RS 485 repeater Bus segment 1 terminated, bus segment 2 looped through The following figures show how to couple two bus segments using an RS 485 repeater. One bus segment is looped through. Bus segment 1 Bus segment 1 Terminating resistor Bus segment 1...
  • Page 24 Connecting 5.4 Configuration options with the RS 485 repeater Bus segments 1 and 2 looped through The following figures show how to couple two bus segments using an RS 485 repeater. Each bus cable is looped through on the RS 485 repeater. Bus segment 1 Bus segment 1 Terminating resistor...

  • Page 25: Technical Data

    Technical data General technical data 6.1.1 Standards and approvals Introduction Contents of general technical data: ● The standards and test values that the S7-300 automation system and its associated components comply with and satisfy. ● The test criteria that were used for the test. Note Information on the nameplate You will find the current markings and approvals on the type plate of the respective...
  • Page 26 ● 94/9/EC "Equipment and protective systems intended for use in potentially explosive atmospheres" (Explosion Protection Directive) The EC declaration of conformity is held on file available to competent authorities at: Siemens AG Automation & Drives Group Industry Sector I IA AS R&D DH A P.O.
  • Page 27 Technical data 6.1 General technical data cULus approval Underwriters Laboratories Inc. complying with ● UL 508 (Industrial Control Equipment) ● CSA C22.2 No. 142 (Process Control Equipment) cULus HAZ. LOC. - approval Underwriters Laboratories Inc., complying with ● UL 508 (Industrial Control Equipment) ●...
  • Page 28 Technical data 6.1 General technical data ATEX approval In accordance with EN 60079-15 (Electrical Apparatus for Potentially Explosive Atmospheres; Type of Protection "n") and EN 60079-0 (Electrical apparatus for potentially explosive gas atmospheres - Part 0: General Requirements) Marking for Australia and New Zealand The S7-300 automation system satisfies requirements of standards to AS/NZS CISPR 16.
  • Page 29 Technical data 6.1 General technical data Use in residential areas Note The S7-300 is designed for use in industrial areas; using it in residential areas could disturb radio and TV reception. To operate an S7-300 in a residential area, it's RF emission must comply with Limit Value Class B to EN 55011.

  • Page 30: Electromagnetic Compatibility

    1 kV (signal lines < 3 m) High-energy single pulse (surge) to IEC 61000-4-5 External protective circuit required (refer to operating instructions SIMATIC S7-300, CPU 31xC and CPU 31x: Installing (http://support.automation.siemens.com/WW/view/en/13008499) in Chapter "Lightning and overvoltage protection") 2 kV (power supply lines) asymmetric coupling ...
  • Page 31 Technical data 6.1 General technical data Sinusoidal disturbance The table below shows the EMC compatibility of S7-300 modules in areas subject to sinusoidal disturbance. ● HF radiation HF radiation according to IEC 61000-4-3 Corresponds with degree of severity Electromagnetic HF field, amplitude-modulated 80 MHz to 1,000 MHz;...

  • Page 32: Shipping And Storage Conditions For Modules And Backup Batteries

    Technical data 6.1 General technical data 6.1.3 Shipping and storage conditions for modules and backup batteries Introduction The shipping and storage conditions of S7-300 modules surpass requirements to IEC 61131- 2. The data below apply to modules shipped or put on shelf in their original packing. The modules are compliant with climatic conditions to IEC 60721-3-3, Class 3K7 (storage), and with IEC 60721-3-2, Class 2K4 (shipping.) Mechanical conditions are compliant with IEC 60721-3-2, Class 2M2.

  • Page 33: Mechanical And Ambient Climatic Conditions For S7-300 Operation

    Technical data 6.1 General technical data 6.1.4 Mechanical and ambient climatic conditions for S7-300 operation Operating conditions S7-300 systems are designed for stationary use in weather-proof locations. The operating conditions surpass requirements to DIN IEC 60721-3-3. ● Class 3M3 (mechanical requirements) ●...
  • Page 34 Technical data 6.1 General technical data Test of mechanical environmental conditions The table below provides important information with respect to the type and scope of the test of ambient mechanical conditions. Condition tested Test Standard Comment Vibration Vibration test to IEC Type of oscillation: Frequency sweeps with a rate of change of 1 60068-2-6 (sinusoidal) octave/minute.

  • Page 35: Of S7-300

    Technical data 6.1 General technical data 6.1.5 Specification of dielectric tests, protection class, degree of protection, and rated voltage of S7-300 Test voltage Proof of dielectric strength must be provided in the type test at a test voltage to IEC 61131-2: Circuits with rated voltage V to other circuits Test voltage...

  • Page 36: Technical Data The Rs 485 Repeater

    Technical data 6.2 Technical data the RS 485 Repeater Technical data the RS 485 Repeater Technical data the RS 485 Repeater Technical data Power supply 24 VDC Rated voltage  20.4 VDC to 28.8 VDC Ripple (static limit)  Current consumption at rated voltage Max.
  • Page 37 Technical data 6.2 Technical data the RS 485 Repeater Pin assignment of the sub-D connector (PG/OP socket) View Pin no. Signal name Designation M24V Ground 24 V RxD/TxD-P Data line B Request To Send M5V2 Data reference potential (from station) P5V2 Supply plus (from station) P24V...
  • Page 38 Technical data 6.2 Technical data the RS 485 Repeater RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 39: Dimension Drawings

    Dimension drawings Dimension drawings RS 485 Repeater on standard mounting rail The figure below shows the dimensional drawing of the RS 485 repeater mounted on the standard mounting rail. Figure 7-1 RS 485 repeater on standard mounting rail RS 485 Repeater Manual, 02/2011, A5E03382072-01...
  • Page 40 Dimension drawings 7.1 Dimension drawings RS 485 repeater on mounting rail The figure below shows the dimensional drawing of the RS 485 repeater on an S7-300 mounting rail. Figure 7-2 RS 485 repeater on standard rail RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 41: Glossary

    Glossary Active RS 485 terminator Separate -> terminating resistor in segments at transmission rates of 9.6 kbps to 12 Mbps. The power supply is separate from the bus nodes. Data transfer bus to which all nodes are connected. It has two defined ends. In the case of PROFIBUS, the bus is a twisted-pair cable or optical fiber cable.
  • Page 42 Glossary DP master In the DP system, the DP master conducts the communication with the DP slaves according to a defined algorithm. To do this, the DP master uses the functions for communication with the DP slaves which are defined by PROFIBUS DP. DP slave The DP slave can be addressed by DP masters.
  • Page 43 Glossary Reference potential Reference potential for the evaluation / measuring of the voltages of participating circuits. RS 485 Asynchronous data transmission technology for PROFIBUS DP to ANSI TIA/EIA-RS485-A. RS 485 repeater Device for amplifying bus signals and for linking → segments over long distances. Slave A slave may only exchange data with a master when requested to do so.
  • Page 44 Glossary RS 485 Repeater Manual, 02/2011, A5E03382072-01...

  • Page 45: Index

    Index IEC 61131, 28 Insulation test, 35 Approval, 25 Internet, Service & Support, 6 CSA, 26 FM, 27 Marine, 28 UL, 26 Use in industrial environments, 28 Marine approval, 28 Use in residential areas, 29 Mounting Mounting rail for S7-300, 13 Standard mounting rail, 15 Configuration, 22 Connecting...
  • Page 46 Index Technical data, 36 EMV (Electromagnetic compatibility), 30 Shipping and storage conditions, 32 Standards and approvals, 25 Technical Support, 5 Terminating resistor, 22 Test voltage, 35 UL certification, 26 ungrounded operation, 17 RS 485 Repeater Manual, 02/2011, A5E03382072-01...

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