II - DCE FEL ČVUT v Praze

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1-38 I/O Modules with Intrinsically-Safe Signals C79000-G7076-C152-04 Fig. 1-17 Lightning/overvoltage protection for a gas compressor station 1 2 3 4 Protective device for AC power system Protective device for measurement and control systems Spark gap Protective device, required for high–cost measurement and control equipment Protective device, not required for shielded cables and low–cost measurement and control equipment Protective device, not required for equipment with high electric strength Protective device, not required with suitable system shielding 45 o Control room (shielded) Low M&C voltage cabinet system Control console EB Annex M&C equipment Sub-distribution board Insulating flange Station ground Cable duct (shielded) 2 1 3 M Metal conduit Cable racks as EB ring Light fixture EB Insulation Smoke detector Compressor bay (shielded) M Fig. 1-17 ”Lightning/overvoltage protection for a gas compressor station” shows an example of how protective devices can be used. 1.9.6 Example of Lightning and Overvoltage Protection Mechanical Configuration of an Automation System with SIMATIC S7 Ex Modules
Mechanical Configuration of an Automation System with SIMATIC S7 Ex Modules 1.9.7 Lightning Strike I/O Modules with Intrinsically-Safe Signals C79000-G7076-C152-04 When lightning strikes an explosive atmosphere it always ignites. There is also a risk of ignition by excessive temperature raise in the lightning discharge paths. In order to prevent, at Zones 0, 1 and 10 themselves, the harmful effects of lightning strikes occurring outside the zones, surge diverters, for example, must be fitted at suitable points. Tank insulation covered with earth and made of metal materials with electrical equipment or electrically conductive system sections, which are electrically insulated with respect to the tank, require equipotential bonding; for example, in the case of measurement and control systems and filling pipes. Note Lightning protection equipment and grounding systems must be tested by an expert upon their completion and at regular intervals. Based on ElexV, the testing interval for electrical systems and lightning protection systems for hazardous areas is three years. Summary: Enhanced external lightning protection (reduced mesh size, increased number of down conductors) on all buildings and systems. Meshing of grounding systems in the building to create area grounding. Meshing of equipotential bonding. Fitting of lightning conductors and surge diverters in the power system. Fitting of overvoltage fine-protection devices at both ends of measurement and control cables. Shielding of measurement and control cables. Measurement and control cables with twisted pairs of cores. 1-39
Page 1 and 2: SIMATIC S7-300, M7-300, ET 200M Aut
Page 3 and 4: Preface Purpose of the manual Conte
Page 5 and 6: Usage and configuration Usage and c
Page 7 and 8: Contents Preface . . . . . . . . .
Page 9 and 10: 4.6 HART Analog Input Module SM 331
Page 11 and 12: 3-13 Connection of loads to a curre
Page 13 and 14: 3-11 Representation of the digitize
Page 15 and 16: Mechanical Configuration of an Auto
Page 17 and 18: Minimum thread measure Mechanical C
Page 19 and 20: Replacing Ex I/O modules Mechanical
Page 21 and 22: Wire end ferrule Fig. 1-2 Installin
Page 23 and 24: 1.3 Configuration of an S7-300 with
Page 25 and 26: 1.4 Configuration of an M7-300 with
Page 27 and 28: 1.6 Equipotential Bonding in System
Page 29 and 30: Main equipotential bonding Addition
Page 35 and 36: 1.7.4 Selecting Cables and Lines in
Page 37 and 38: Type designations for lines in acco
Page 39 and 40: Table 1-4 Siemens cables for measur
Page 43 and 44: Shielding of intrinsically safe sig
Page 45 and 46: 1.8.3 Measures to Counteract Interf
Page 51: Mechanical Configuration of an Auto
Page 55 and 56: Table 1-7 Safety measures Mechanica
Page 57 and 58: Housing Cables Terminals Protective
Page 59 and 60: Table 1-8 Working on systems to typ
Page 61 and 62: SIMATIC S7 Ex Digital Modules In th
Page 63 and 64: Wiring diagram SM 321 DI 4 x NAMUR
Page 65 and 66: Digital input SM 321; DI 4 x NAMUR
Page 67 and 68: Parameterization Default settings C
Page 69 and 70: Input delay Diagnostics Parameteriz
Page 71 and 72: Errors and corrective measures I/O
Page 73 and 74: Influence of supply voltage and ope
Page 75 and 76: Wiring diagram Notes on intrinsical
Page 77 and 78: Digital output SM 322; DO 4 x 24V/1
Page 79 and 80: Parameterization Default settings C
Page 81 and 82: Diagnostic evaluation Diagnostics o
Page 83 and 84: Interrupts Parameterizing interrupt
Page 85 and 86: Block diagram S7-300 Backplane bus
Page 87 and 88: Safety data (refer to Certificate o
Page 89 and 90: SIMATIC S7 Ex Analog Modules In thi
Page 91 and 92: 3.1.2 Analog Representation for Mea
Page 93 and 94: Current measuring ranges I/O Module
Page 95 and 96: Temperature range, standard, Pt 100
Page 97 and 98: Temperature range, standard, Ni 100
Page 99 and 100: DIN IEC 584 Temperature range type
Page 101 and 102: Temperature range type E I/O Module
Page 103 and 104:
Temperature range type L I/O Module
Page 105 and 106:
Temperature range type N I/O Module
Page 107 and 108:
Temperature range type S I/O Module
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3.1.3 Analog Value Representation f
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Abbreviations Insulated measured va
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3.3 Connection of Thermocouples, Vo
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Internal compensation Thermocouple
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Thermocouples with direct looping-i
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Thermocouples with internal compens
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3.3.3 Connection of Resistance Ther
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I/O Modules with Intrinsically-Safe
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Connecting loads to a current outpu
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Page 129 and 130:
3.6.3 Parameters of Analog Modules
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Table 3-22 Parameters of the analog
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3.6.4 Diagnostics of Analog Modules
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Table 3-25 Diagnostic messages of a
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Faults and corrective measures I/O
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3.6.6 Characteristics of Analog Mod
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Influence of faults I/O Modules wit
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Wiring diagram SM 33 1 AI 8 xTC / 4
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Special feature of resistant measur
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Analog Input SM 331; AI 8 x TC/4 x
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Error limits of analog inputs for t
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3.8 Analog Input Module SM 331; AI
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Parameterization Default settings C
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Analog value formation Measuring pr
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Wiring diagram SM 3 32 AO 4 x 0/4..
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Analog output Output ranges I/O Mod
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Interference rejection, error limit
Page 163 and 164:
SIMATIC S7 HART Analog Modules In t
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4.2 Introduction to HART Introducti
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Examples of HART parameters Example
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4.3 Guidelines for Installation, St
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Modifying the parameters of the fie
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4.4 Parameters of HART Analog Modul
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4.5 Diagnostics and Interrupts of H
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4.6 HART Analog Input Module SM 331
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Wiring diagram SM 3 31 AI 2 x 0/4..
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Analog value formation Measuring pr
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Default settings Wire break monitor
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SM 332; AO 2 x 0/4...20mA HART Dime
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4.8 Data Record Interface and User
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Structure of the parameter data rec
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Diagnostic data: data record 1 Note
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Structure of command data record No
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Table 4-13 HART group error display
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Structure of the diagnostic data re
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4.8.6 User Data Interface Input Are
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Certificates of Conformity In this
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A.1.1 ASEV Certificate/Switzerland
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A.2 Certificate of Conformity for D
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A.3 Certificate of Conformity for D
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A.7 KEMA Certificate of Conformity
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A.7.2 EC Declaration of Conformity
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A.8.1 EC Declaration of Conformity
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Safety Standards, FM Approval In th
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FM approval I/O Modules with Intrin
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Bibliography In this appendix I/O M
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Glossary A AS ATEX 100a B Backplane
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D Diagnostic interrupt Diagnostic b
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FM Frequency shift keying FSK G Gro
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HART transfer area HCF I Interrupt
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O OB Organization blocks P Paramete
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R Reference potential Response time
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Index Numbers 2-wire transducer, 3-
Page 271 and 272:
DP master class 2, default paramete
Page 273 and 274:
Interference frequency suppression,
Page 275 and 276:
Range of measurement parameter bloc
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SM 332; AO 4 x 0/4...20 mA, 3-1 bas
Page 279 and 280:
Siemens AG A&D AS E81 Oestliche Rhe
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II - DCE FEL ČVUT v Praze

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