Handling the Shields | Siemens S7-400 specification

Assembling and Installing Systems

Handling the Shields

Observe the following points with regard to the shield:

•Only use cable clamps made of metal to secure braided shields. The clamps must surround the shield over a large area and provide good contact.

•Connect the shield to a shield bus immediately after entry of the cable into the cabinet. Route the shield to the module but do not connect it there again to the chassis ground or the shield bus.

•For installation other than in cabinets (for example, wall mounting), you can provide contact between the cable shields and the cable duct.

Shown in the figure A-4 are some methods of securing shielded cables with cable

clamps.

Figure A-4 Mounting Cable Shields

A-14	Automation System S7-400	Hardware and Installation
A-14		A5E00850741-01

Image 182

Siemens S7-400 installation manual Handling the Shields, Figure A-4 Mounting Cable Shields

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 Central Rack CR and Expansion Rack ER S7-400 InstallationIntroduction 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 Retaining Distances Between Devices Important Notes on InstallationMounting and Grounding the Racks Dimensions of the Racks Mounting the Rack Screw Type Explanation Connecting the Rack to the Chassis GroundMounting Screws Mounting Additional Racks 840 mm Cable duct/fan subassembly Reference Point M4 x Ungrounded configuration Grounded configurationConnection to the Reference Point 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 Types and Dimensions of Cabinets Choosing and Setting up Cabinets with the S7-400Why Cabinets are Required Open Cabinets Closed Cabinets Removable Power Dissipation from Cabinets Example Type of Cabinet Max. Permissible Ambient Cabinet dimensionsExample of selecting the cabinet type Space Requirement of the Racks Rules for the Arrangement of ModulesArrangement of the Modules Modules Tool Installing Modules in a RackInstallation Sequence Removing the Cover Attaching the Modules Screwing the Modules in Place Fitting Slot Labels Marking the Modules with Slot LabelsSlot Number Networking Methods of Expansion and NetworkingDistributed I/Os Accessories Accessories Installing the S7-400 Addressing the S7-400 Geographical Addresses Geographical and Logical AddressesAddresses Logical Addresses Default Addressing Conditions for Default Addressing Example How to Determine the Default Address of a ModuleDefault Addresses of Digital Modules 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 Example of Ungrounded Operation Filtering the 24 VDC SupplyInsulation Monitoring Isolated Modules and Grounding Concept Assembling an S7-400 with Isolated ModulesDefinition 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 Use only Approved Components Interference-Free Configuration for Local ConnectionsInterference-Free Configuration for Remote Connections Special Cases Wiring Rules Lines and Tools Disconnecting the Power Supply Connector Wiring the Power Supply ModulePower 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 Fuse Setting the Fan Subassembly to the Line VoltageWiring the Fan Subassembly 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 Maximum Number of Connections via MPI Rules for MPI AddressesPG / OP -- Module communication without 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 Appearance 6ES7972-0B.20 Bus ConnectorsPurpose of the Bus Connector Removing the Bus Connector Connecting Bus Cables to Bus Connectors 6ES7972-0B.20Connecting the Bus Connector RS 485 Repeater / Diagnostics Repeater Benefits and Areas of Application PROFIBUS-DP Network with Fiber-Optic CablesElectrical/Optical Conversion 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 How to Proceed in the Case of an Error Recommended Procedure for First StartupRecommended Procedure 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 Line Voltage Module SettingsPower Supply Module If You Then Connecting a Programming Device PG to an S7-400Connecting a Programming Device PG to an S7-400 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 Special Case MPI Parameters What Happens in the CPU During a Memory ResetWhat Remains Following the Memory Reset Hot restart Cold, Warm, and Hot Restarts with the Mode Selector SwitchRestart warm start Control sequence for restart warm restart / hot restart What Type of Memory Card Should You Use? Inserting a Memory CardMemory Card as Load Memory Inserting a Memory Card Inserting a Backup Battery Inserting a Backup Battery OptionBackup 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 Removing the Module Replacing CPUsSaving the Data 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 Removing Modules / Exchanging Cables Replacing Interface ModulesHot--swapping Modules Installing a New Module Replacing the Fuse Replacing the Fuse of the Fan SubassemblyFuse Type Replacing Fans in the Fan Subassembly During Operation Removing the Fans Maintenance Replacing the Filter Frame Maintenance Exchanging the Mother Board Available Interface Submodules Installing Interface SubmodulesReplacing 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 Possible Effects of Interference Principles of System Installation for EMCDefinition EMC 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 See also Rule 4 Special EMC MeasuresRule 5 Standard Reference Potential 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 Equipotential Bonding Conductor Equipotential BondingPotential Differences 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 Order No Additional MeasuresSer Cables for Equip transition point 0 With 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 zone Sample CircuitLightning-protection 0, field side zone Components in figure A-7 Ser. No Components Description From fi Gure A-7 Additional Overvoltage Protection Inductive Surge VoltageIntegrated Surge Arrester Suppression with AC-Operated Coils Suppression for DC-Operated CoilsSuppression with Diodes / Zener Diodes Risks Safety of Electronic Control EquipmentIntoduction Reliability Important Information Operation under Industrial Conditions Interference-Free Connection of MonitorsOperation under Low-Interference 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 Function Error DisplayError Response 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