II - DCE FEL ČVUT v Praze

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SIMATIC S7 Ex Analog Modules Non-insulated transducers 3-24 Non-insulated transducers are connected to the ground potential on site. Due to local conditions or interference, differences in potential (static or dynamic) can occur between the locally distributed test points. Equipotential bonding conductors should be provided between the test points in order to avoid these differences in potential. Fig. 3-2 shows the connection principle of non-insulated transducers to an isolated analog input module. Non-insulated transducers U CM U UCM max. U ISO Equipotential bonding conductor M+ M- M+ M- U ISO ADU Logic Ground bus P5V M internal CPU Backplane bus Fig. 3-2 Connection of non-insulated transducers to an isolated analog input module M L+ M I/O Modules with Intrinsically-Safe Signals C79000-G7076-C152-04
3.3 Connection of Thermocouples, Voltage Sensors and Resistance Sensors to Analog Input SM 331; AI 8 x TC/4 x RTD Overview I/O Modules with Intrinsically-Safe Signals C79000-G7076-C152-04 The following descriptions refer to the operation of transducers with the analog input module SM 331; AI 8 x TC/4 x RTD. A description the design and operating principle of thermocouplesand the use of compensation boxes A description of how you connect thermocouples to analog inputs A description of how you connect voltage sensors to analog inputs A description of how you connect resistance thermometers and resistance sensors to analog inputs 3.3.1 Use and Connection of Thermocouples Introduction Design of thermocouples The design of thermocouples and what you must bear in mind when connecting thermocouples are described in this section. A thermocouple consists of the actual thermocouple (measuring sensor) and the necessary installation and connection parts. The thermocouple is made up of two wires which are made of different metals or metal alloys and whose ends are soldered or welded together. The different material compositions produce different types of thermocouples, e.g. K, J, N. Irrespective of the type of thermocouple, the measuring principle is the same for all. ° C Measuring junction Thermocouple with positive and negative limbs Connection point Compensation line(material with same thermal e.m.f. as thermocouple) Reference junction Copper conductor Fig. 3-3 Measuring circuit with thermocouple SIMATIC S7 Ex Analog Modules Thermal e.m.f. acquisition point 3-25
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SIMATIC S7-300, M7-300, ET 200M Aut
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Preface Purpose of the manual Conte
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Usage and configuration Usage and c
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Contents Preface . . . . . . . . .
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4.6 HART Analog Input Module SM 331
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3-13 Connection of loads to a curre
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3-11 Representation of the digitize
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Mechanical Configuration of an Auto
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Minimum thread measure Mechanical C
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Replacing Ex I/O modules Mechanical
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Wire end ferrule Fig. 1-2 Installin
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1.3 Configuration of an S7-300 with
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1.4 Configuration of an M7-300 with
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1.6 Equipotential Bonding in System
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Main equipotential bonding Addition
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1.7.4 Selecting Cables and Lines in
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Type designations for lines in acco
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Table 1-4 Siemens cables for measur
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Shielding of intrinsically safe sig
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1.8.3 Measures to Counteract Interf
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Table 1-7 Safety measures Mechanica
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Housing Cables Terminals Protective
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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 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
Page 109 and 110: 3.1.3 Analog Value Representation f
Page 111: Abbreviations Insulated measured va
Page 115 and 116: Internal compensation Thermocouple
Page 117 and 118: Thermocouples with direct looping-i
Page 119 and 120: Thermocouples with internal compens
Page 121 and 122: 3.3.3 Connection of Resistance Ther
Page 123 and 124: I/O Modules with Intrinsically-Safe
Page 125 and 126: Connecting loads to a current outpu
Page 127 and 128: I/O Modules with Intrinsically-Safe
Page 129 and 130: 3.6.3 Parameters of Analog Modules
Page 131 and 132: Table 3-22 Parameters of the analog
Page 133 and 134: 3.6.4 Diagnostics of Analog Modules
Page 135 and 136: Table 3-25 Diagnostic messages of a
Page 137 and 138: Faults and corrective measures I/O
Page 139 and 140: 3.6.6 Characteristics of Analog Mod
Page 141 and 142: Influence of faults I/O Modules wit
Page 143 and 144: Wiring diagram SM 33 1 AI 8 xTC / 4
Page 145 and 146: Special feature of resistant measur
Page 147 and 148: Analog Input SM 331; AI 8 x TC/4 x
Page 149 and 150: Error limits of analog inputs for t
Page 151 and 152: 3.8 Analog Input Module SM 331; AI
Page 155 and 156: Analog value formation Measuring pr
Page 157 and 158: Wiring diagram SM 3 32 AO 4 x 0/4..
Page 159 and 160: Analog output Output ranges I/O Mod
Page 161 and 162: Interference rejection, error limit
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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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I/O Modules with Intrinsically-Safe
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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-
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DP master class 2, default paramete
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Interference frequency suppression,
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Range of measurement parameter bloc
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SM 332; AO 4 x 0/4...20 mA, 3-1 bas
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Siemens AG A&D AS E81 Oestliche Rhe
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II - DCE FEL ČVUT v Praze

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