Examples of EMC-Compatible Assembly | Siemens S7-400 specs

Assembling and Installing Systems

A.4 Examples of EMC-Compatible Assembly

Introduction

Below you will find two examples of configurations for programmable controllers for EMC.

Example 1: Cabinet Configuration for EMC

Figure A-2 shows a cabinet installation in which the measures described above (grounding of inactive metal parts and connection of cable shields) have been applied. However, this example only applies to grounded operation. Observe the points marked in the figure when installing your system.

2

1

3

4

5

6

7

8

Figure A-2 Example of Cabinet Installation for EMC

A-10	Automation System S7-400	Hardware and Installation
A-10		A5E00850741-01

Image 178

Siemens S7-400 installation manual Examples of EMC-Compatible Assembly, Example 1 Cabinet Configuration for EMC

Contents

Simatic Safety Guidelines Scope of this Manual Purpose of the ManualRequired Basic Knowledge Approvals Further Support NavigatingRecycling and Disposal Training Centers Service & Support on the Internet Technical Support Preface Contents Contents Maintenance Assembling and Installing Systems Figures Routing Equipotential Bonding Conductor and Signal Line Tables Features of the S7-400 Overview of the S7-400 S7-400 components Components Function Illustration Location of the order number and product version Example of a rating plate Chapter Overview Section Description Introduction S7-400 InstallationCentral Rack CR and Expansion Rack ER Overview of the Connections Connecting the CR and ERsConnecting with a 5 V Supply Local Connection Remote Connection Ways of Connecting Central and Expansion Racks Rules for Connection Type of Connection Maximum Total Cable Length Function of the Racks Installing the Central Rack CR and Expansion Rack ERRack No. Available Application Characteristics Slots Buses Racks in the S7-400 System Communication Bus C Bus Electrical SupplyBus Rack with I/O Bus and Communication Bus Segmented CR Properties Characteristics Subdivided CR Mounting and Grounding the Racks Important Notes on InstallationRetaining Distances Between Devices Dimensions of the Racks Mounting the Rack Mounting Screws Connecting the Rack to the Chassis GroundScrew Type Explanation Mounting Additional Racks 840 mm Cable duct/fan subassembly Reference Point Connection to the Reference Point Ungrounded configuration Grounded configurationM4 x Methods of Ventilation Methods of Ventilation Wall Changing the Ventilation Shipping state Filter Mat Optional Installing the Fan Subassembly Procedure Monitoring the Fan Subassembly Installing the Cable Duct Why Cabinets are Required Choosing and Setting up Cabinets with the S7-400Types and Dimensions of Cabinets Open Cabinets Closed Cabinets Removable Power Dissipation from Cabinets Example Example of selecting the cabinet type Cabinet dimensionsType of Cabinet Max. Permissible Ambient Space Requirement of the Racks Rules for the Arrangement of ModulesArrangement of the Modules Modules Installation Sequence Installing Modules in a RackTool Removing the Cover Attaching the Modules Screwing the Modules in Place Slot Number Marking the Modules with Slot LabelsFitting Slot Labels Distributed I/Os Methods of Expansion and NetworkingNetworking Accessories Accessories Installing the S7-400 Addressing the S7-400 Geographical Addresses Geographical and Logical AddressesAddresses Logical Addresses Default Addressing Conditions for Default Addressing Default Addresses of Digital Modules How to Determine the Default Address of a ModuleExample Default Addresses of Analog Modules How to Determine the Default Address of a Channel Channel on a Digital Module Channel on an Analog Module Addressing the S7-400 Wiring the S7-400 Supplying Power to Modules Power Supply Modules and Load Current Power Supplies Calculation Example Choosing the Power Supply ModuleEstimating the Power Requirement Module Quantity +5 VDC Max. Current Consumption Load Current Power Supplies Choosing the Load Current Power SupplyChoosing the Load Current Power Supply Determining the Load Current Components and Protective Measures Assembling an S7-400 with Process I/OsDefinition of a Grounded Supply TN-S Network Rule Grounding the Load Current Circuits S7-400 in the Overall Installation CPU Discharge of Interference Currents Assembling an S7-400 with Grounded Reference Potential MApplication Terminal Connection Model Power Supply Units An S7-400 Configured with Ungrounded Reference Potential Insulation Monitoring Filtering the 24 VDC SupplyExample of Ungrounded Operation Definition Assembling an S7-400 with Isolated ModulesIsolated Modules and Grounding Concept Configuration with Isolated Modules Parallel Wiring of Digital S7-400 Outputs Protective Ground GroundingGround Connections Device Grounding Method Connecting the Load Voltage Ground Mode Connection of Load Voltage Interference-Free Configuration for Remote Connections Interference-Free Configuration for Local ConnectionsUse only Approved Components Special Cases Wiring Rules Lines and Tools Power Supply Connector Wiring the Power Supply ModuleDisconnecting the Power Supply Connector Wiring the Power Supply Connector AC DC L1 L+ Plugging In the Power Supply Connector 11 Plugging the power supply connector Wiring the Signal Modules Three Types of Front Connector Preparing to Wire the Front Connector 12 Preparing to wire the front connector Wiring the Front Connector, Crimping 13 Wiring a Front Connector with Crimp Terminals Wiring the Front Connector, Screw Terminals 14 Wiring a Front Connector with Screw-Type Terminals Wiring the Front Connector, Spring-Type Terminals 15 Wiring a Front Connector with Spring-Type Terminals Principle of the spring loaded terminal 16 Principle of the spring contact Fitting the Strain Relief Cable Ties as Strain Relief Labeling a Front Connector Labels and Terminal Diagram 19 shows details for fitting a label in the front connector Labels How to Label S7-400 Modules Order Number Description Plugging In the Front Connector Fitting the Front ConnectorFront Connector Coding on the Signal Modules Principle of a Coding Key 20 Attaching the Front Connector 21 shows how to screw on the front connector Interconnecting the CR and ERs Interconnecting the Interface Modules 23 Connection Between a Send IM and Two Receive IMs Wiring the Fan Subassembly Setting the Fan Subassembly to the Line VoltageFuse Cable routing in cable ducts or fan subassemblies Routing Fiber-Optic Cables Networking Configuring Communication Configuring a NetworkSame Configuration Subnets Segment FundamentalsStation = Node Baud Rate Number of Nodes Default MPI AddressesNode Device Default MPI Address Default Highest MPI MPI/PROFIBUS-DP Addresses PG / OP -- Module communication without MPI Rules for MPI AddressesMaximum Number of Connections via MPI PG Access Rules for Configuring a Network Rules Recommendation for PROFIBUS-DP Addresses Data Packets in the MPI NetworkRecommendation for MPI Addresses Components Terminating Resistor on the Bus Connector Terminating Resistor on the RS 485 Repeater Example Terminating Resistor in the MPI Network Example of an MPI Network Example of a PROFIBUS-DP Network Example Using a CPU PROFIBUS-DP Programming Device Access Beyond Network Limits Routing Programming device access beyond network limits Segment in the PROFIBUS-DP Network Cable LengthsSegment in the MPI Network Longer Cable Lengths Lengths of Spur Lines 10 Configuration of an MPI network PROFIBUS-DP Bus Cables Characteristics of the PROFIBUS-DP Bus CablePROFIBUS-DP Bus Cables Rules for Laying Cables Purpose of the Bus Connector Bus ConnectorsAppearance 6ES7972-0B.20 Connecting the Bus Connector Connecting Bus Cables to Bus Connectors 6ES7972-0B.20Removing the Bus Connector RS 485 Repeater / Diagnostics Repeater Electrical/Optical Conversion PROFIBUS-DP Network with Fiber-Optic CablesBenefits and Areas of Application Optical PROFIBUS-DP Network in Partyline Topology Transmission Rate Features of the Fiber-Optic Cables Profibus Optical Bus Terminal OBT Cable grip Simatic NET Profibus plastic fiber-optic, standard cable Order NumbersPrerequisite Simatic NET Profibus PCF fiber-optic, standard cable Accessories Order Number Structure Laying PCF Fiber-Optic Cable Cable LengthsMixed Use of Plastic Fiber-Optic and PCF Fiber-Optic Cable Laying Plastic Fiber-Optic Cable Installing the Connector Adapter Rules for Laying Cable Networking Commissioning Recommended Procedure Recommended Procedure for First StartupHow to Proceed in the Case of an Error Mounting and Wiring Modules Checks Prior to Switching On for the First TimeChecks Prior to Switching On for the First Time Grounding and Chassis Ground Concept Power Supply Module Module SettingsLine Voltage Connecting a Programming Device PG to an S7-400 Connecting a Programming Device PG to an S7-400If You Then Switching On an H System for the First Time Switching On an S7-400 for the First TimeSwitching On an S7-400 for the First Time Communication between Programming Device and CPU When Should a CPU be Reset? Resetting the CPU with the Mode Selector SwitchHow to Carry Out a Memory Reset How to Perform a Memory Reset Resetting the CPU with the Mode Selector Switch What Remains Following the Memory Reset What Happens in the CPU During a Memory ResetSpecial Case MPI Parameters Hot restart Cold, Warm, and Hot Restarts with the Mode Selector SwitchRestart warm start Control sequence for restart warm restart / hot restart Memory Card as Load Memory Inserting a Memory CardWhat Type of Memory Card Should You Use? Inserting a Memory Card Backup Inserting a Backup Battery OptionInserting a Backup Battery Commissioning Commissioning Removing a Backup Battery Reducing the Passivation Layer Starting Up Starting Up a PROFIBUS-DP SubnetRequirements Behavior of the CPU During Startup Installing Interface Modules Available Interface Modules Covering Unused Submodule Slots Commissioning Maintenance Replacing the Backup Battery Replacing the Backup Battery Using Backup Batteries Rules for the Care of Backup Batteries Slot Numbering Replacing a Power Supply ModuleInstalling a New Module How the S7-400 Behaves after Exchanging Modules Saving the Data Replacing CPUsRemoving the Module Installing a New Module Installing a Module Replacing Digital or Analog Modules Removing the Front Connector Coding Key Exchanging the Front Connector Check the Plant Changing the Fuses in the Digital ModulesModules with Fuses Changing the Fuses How the S7-400 Behaves after Replacing the Fuse Hot--swapping Modules Replacing Interface ModulesRemoving Modules / Exchanging Cables Installing a New Module Fuse Type Replacing the Fuse of the Fan SubassemblyReplacing the Fuse Replacing Fans in the Fan Subassembly During Operation Removing the Fans Maintenance Replacing the Filter Frame Maintenance Exchanging the Mother Board Replacing Interface Submodules Installing Interface SubmodulesAvailable Interface Submodules Inserting an Interface Submodule in a CPU Assembling and Installing Systems Specific Application General Rules and Regulations for Operating the S7-400General Basic Rules Emergency OFF Devices Protection Against External Electrical Effects 120/230 VAC SupplyVDC Supply With You Must Ensure Protection Against Other Electrical Effects Protection against By Means Definition EMC Principles of System Installation for EMCPossible Effects of Interference Inductive Coupling Coupling MechanismsCapacitive Coupling Radiated Interference Rule 2 Correct Cable Routing Five Basic Rules for Ensuring Electromagnetic CompatibilityRule 1 Large Area Grounding Rule 3 Secure Cable Shields Rule 5 Standard Reference Potential Rule 4 Special EMC MeasuresSee also Ensure the following when chassis grounding Installation of Programmable Controllers for EMCGrounding of Inactive Metal Parts During Installation Inactive Metal Parts Examples of EMC-Compatible Assembly Example 1 Cabinet Configuration for EMC Key for example Example 2 EMC--compliant Wall Mounting Ensure the following for frame and wall mounting Figure A-3 shows an example of wall mounting for EMC Principle of Operation Shielding CablesPurpose of the Shielding Suitable Cables Handling the Shields Figure A-4 Mounting Cable Shields Potential Differences Equipotential BondingEquipotential Bonding Conductor Assembling and Installing Systems Connect Cables for Run How to Read the TableCabling Inside Buildings Inside cabinets Ethernet Rules for Lightning Protection Outside Buildings Cabling Outside BuildingsRules for EMC Overvoltage Protection Devices Lightning Protection and Overvoltage Protection Overview Effects of a Lightning Strike Surges Diagram of the Lightning Protection Zones Figure A-6 Lightning Protection Zones of a Building Ser Cables for Equip transition point 0 With Additional MeasuresOrder No Dehn + Söhne Lightning Protection Element for Signal Modules Lightning Protection Element for the 24 VDC Supply Low-Voltage Protection Elements for 1 Ser Cables for Equip transition point 1 2 with Order No Low-Voltage Protection Elements for 2 Ser Cables for Equip transition point Order No With Lightning-protection 0, field side zone Sample CircuitLightning-protection zone Components in figure A-7 Ser. No Components Description From fi Gure A-7 Integrated Surge Arrester Inductive Surge VoltageAdditional Overvoltage Protection Suppression with Diodes / Zener Diodes Suppression for DC-Operated CoilsSuppression with AC-Operated Coils Intoduction Reliability Safety of Electronic Control EquipmentRisks Important Information Operation under Low-Interference Conditions Interference-Free Connection of MonitorsOperation under Industrial Conditions Shielding and Grounding under Industrial Conditions Isolated Section You will find What is ESD? Electrostatic Charging of Persons Charging Ensure Sufficient Grounding Avoid Direct Contact Analog Module Backup BatteryAddress Bit Memory M Central module ConfigurationConfiguring Chassis Ground Cycle time Default SettingCounters Cyclic Interrupt DP Master Diagnostic BufferDiagnostic Interrupt DP Slave Error Response Error DisplayFunction Function Module FM Functional GroundingFunction Block FB Global Data Communication Interface, Multipoint Hardware InterruptInstance Data Block Interrupt, Cyclic Logic Block Load MemoryLocal Data Manufacturer--specific interrupt Network MPI AddressNesting Depth Node Number Operating System of the CPU OB PriorityOperating State Organization Block OB Process Image Parameters, StaticPriority classes Programming Device PG Reference Potential Run-Time ErrorReference Ground Retentive Data Status interrupt Signal ModuleSlave Substitute Value System Function SFC System DiagnosticsTime-Delay Interrupt System Function Block SFB Update interrupt Timer TToggle switch Total Current Watchdog interrupt VaristorWarm Restart Work Memory Index Index Index-3 Index-4