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Principles of analog value processing

4.6 Wiring and connecting thermocouples

S7-300 Module data

250 Manual, 06/2017, A5E00105505-AJ

Thermocouple structure

Thermocouples consist of a pair of thermal probes and all necessary installation and

connecting parts. The thermocouple pair consists of two wires made of different metals, or of

metal alloys soldered or welded together at their ends.

The different thermocouple types, for example, K, J or N, are derived from different material

compositions. The measuring principle of all thermocouples is the same, irrespective of their

type.

①

Measurement point

②

Thermocouple with positive and negative thermal elements

③

Terminal

④

Compensating line

⑤

Reference junction

⑥

Supply line

⑦

Thermal voltage acquisition point

Figure 4-13 Fig. 4-22 Structure of thermocouples

Preface3
Table of Contents7
General Technical Data14
- Standards and Approvals14
- Electromagnetic Compatibility19
- Shipping and Storage Conditions for Modules and Backup Batteries21
- 1.4 Mechanical and Climatic Environmental Conditions for S7-300 Operation23
- Specification of Dielectric Tests, Protection Class, Degree of Protection, and Rated Voltage of S7-30025
- Rated Voltages of S7-30025
- SIPLUS S7-300 Modules26
- 1.8 Environmental Conditions for the Operation of SIPLUS S7-300 Modules30
Power Supply Modules32
- Power Supply Module PS 307; 2 A; (6ES7307-1BA01-0AA0)33
- Power Supply Module PS 307; 5 A; (6ES7307-1EA01-0AA0)36
- Power Supply Module PS 307; 10 A; (6ES7307-1KA02-0AA0)39
- Power Supply Module PS 305; 2 A; (6AG1305-1BA80-2AA0)42
- Power Supply Module PS 307; 5 A; (6AG1307-1EA80-2AA0)45
Digital Modules48
- Module Overview49
- Digital Input Modules49
- Digital Output Modules52
- Relay Output Modules55
- Digital IO Modules56
- Steps in Selecting and Commissioning the Digital Module57
- Programming Digital Modules58
- Diagnostics of Digital Modules59
- How to Protect Digital Modules from Inductive Overvoltage61
- Digital Input Module SM 321; DI 64 X DC 24 V, Sinking/Sourcing; (6ES7321-1BP00-0AA0)63
- Digital Input Module SM 321; DI 32 X DC 24 V; (6ES7321-1BL00-0AA0)70
- Digital Output Module SM 321; DI 32 X AC 120 V; (6ES7321-1EL00-0AA0)73
- Digital Input Module SM 321; DI 16 X DC 24 V; (6ES7321-1BH02-0AA0)76
- Digital Input Module SM 321; DI 16 X DC 24 V High Speed; (6ES7321-1BH10-0AA0)78
Digital Input Module SM 321; DI 16 X 24 VDC; with Hardware and Diagnostic Interrupts (6ES7321-7BH01-0AB0)80
Isochronous Mode85
SM 321; DI 16 X DC 24 V - Parameters86
SM 321; DI 16 X DC 24 V - Diagnostics88
SM 321; DI 16 X DC 24 V - Behavior90
SM 321; DI 16 X DC 24 V - Interrupts91
Digital Input Module SM 321; DI 16 X DC 24/125 V; with Hardware and Diagnostic Interrupts (6ES7321-7EH00-0AB0)94
Parameters of SM 321; DI 16 X DC 24/125 V98
Diagnostics of SM 321; DI 16 X DC 24/125 V99
Interrupts of SM 321; DI 16 X DC 24/125 V100
Digital Input Module SM 321; DI 16 X DC 24 V; Source Input; (6ES7321-1BH50-0AA0)103
Digital Input Module SM 321; DI 16 X UC 24/48 V; (6ES7321-1CH00-0AA0)105
Digital Input Module SM 321; DI 16 X DC 48-125 V; (6ES7321-1CH20-0AA0)108
Digital Input Module SM 321; DI 16 X AC 120/230 V; (6ES7321-1FH00-0AA0)111
Digital Input Module SM 321; DI 8 X AC 120/230 V; (6ES7321-1FF01-0AA0)114
Digital Input Module SM 321; DI 8 X AC 120/230 V ISOL; (6ES7321-1FF10-0AA0)117
Digital Output Module SM 322; DO 64 X DC 24 V/0.3 a Sourcing; (6ES7322-1BP00-0AA0)120
Digital Output Module SM 322; DO 64 X DC 24 V/0.3 a Sinking (6ES7322-1BP50-0AA0)128
Digital Output Module SM 322; DO 32 X DC 24 V/ 0.5 A; (6ES7322-1BL00-0AA0)135
Digital Output Module SM 322; DO 32 X AC 120/230 V/1 A; (6ES7322-1FL00-0AA0)139
Digital Output Module SM 322; DO 16 X DC 24 V/ 0.5 A; (6ES7322-1BH01-0AA0)143
Digital Output Module SM 322; DO 16 X DC 24 V/0.5 A: (6ES7322-8BH10-0AB0)147
Parameters of Digital Output Modules152
Diagnosis of Digital Output Modules153
Firmware Update Via HW Config154
I&M Identification Data155
Digital Output Module SM 322; DO 16 X DC 24 V/0.5 a High Speed; (6ES7322-1BH10-0AA0)157
Digital Output Module SM 322; DO 16 X UC 24/48 V; (6ES7322-5GH00-0AB0)161
Parameters of Digital Output Module SM 322 DO 16 X UC24/48 V165
Digital Output Module SM 322; DO 16 X AC 120/230 V/1 A; (6ES7322-1FH00-0AA0)167
Digital Output Module SM 322; DO 8 X DC 24 V/2 A; (6ES7322-1BF01-0AA0)170
Digital Output Module SM 322; DO 8 X DC 24 V/ 0.5 A; with Diagnostics Interrupt; (6ES7322-8BF00-0AB0)174
SM 322; DO 8 X DC 24 V/0.5 a - Parameters178
SM 322; DO 8 X DC 24 V/0.5 a - Diagnostics179
SM 322; DO 8 X DC 24 V/0.5 a - Behavior181
SM 322; DO 8 X DC 24 V/0.5 a - Interrupts182
Digital Output Module SM 322; DO 8 X DC 48-125 V/1.5 A; (6ES7322-1CF00-0AA0)183
- Digital Output Module SM 322;DO 8 X AC 120/230 V/2 A; (6ES7322-1FF01-0AA0)187
- Digital Output Module SM 322; DO 8 X AC 120/230 V/2 a ISOL (6ES7322-5FF00-0AB0)191
- Parameters of SM 322; DO 8 X AC 120/230 V/2 a ISOL195
- SM 322; DO 8 X AC 120/230 V/2 a ISOL - Diagnostics196
- SM 322; DO 8 X AC 120/230 V/2 a ISOL - Interrupts196
- Relay Output Module SM 322; DO 16 X Rel. AC 120/230 V; (6ES7322-1HH01-0AA0)198
- Relay Output Module SM 322; DO 8 X Rel. AC 230 V; (6ES7322-1HF01-0AA0)203
- Relay Output Module SM 322; DO 8 X Rel. 230VAC/5A; (6ES7322-5HF00-0AB0)208
- Parameters of SM 322; DO 8 X Rel. AC 230V/5A214
- SM 322; DO 8 X Rel. AC 230V/5A - Diagnostics214
- SM 322; DO 8 X Rel. AC 230V/5A - Interrupts215
- Relay Output Module SM 322; DO 8 X Rel. AC 230 V/5 A; (6ES7322-1HF10-0AA0)216
- Digital IO Module SM 323; DI 16/DO 16 X DC 24 V/0.5 A; (6ES7323-1BL00-0AA0)222
- Digital IO Module SM 323; DI 8/DO 8 X DC 24 V/0.5 A; (6ES7323-1BH01-0AA0)227
- Programmable Digital IO Module SM 327; DI 8/DO 8 X DC 24 V/0.5 a (6ES7327-1BH00-0AB0)231
- Parameters of SM 327; DI 8/DO 8 X 24 VDC/0.5 a235
- Structure of Data Record 1 of SM 327; DI 8/DO 8 X DC 24 V/0.5 a236
Principles of Analog Value Processing238
- Overview238
- Wiring and Connecting Transducers to Analog Inputs239
- Wiring and Connecting Electrically Isolated Transducers240
- Wiring Non-Isolated Transducers241
- Wiring and Connecting Voltage Transducers244
- Wiring and Connecting Current Transducers245
- Wiring and Connecting Resistance Thermometers and Resistors247
- Wiring and Connecting Thermocouples249
- Wiring and Connecting Thermocouples with Internal Compensation253
- Wiring and Connecting Thermocouples with External Compensation254
- Wiring and Connecting Loads/Actuators to Analog Outputs257
- Wiring and Connecting Loads/Actuators to Voltage Outputs258
- Wiring and Connecting Loads/Actuators to Current Outputs260
Principles of Analog Modules261
- Representation of the Values for Analog Input Channels262
- Representation of Analog Values for Analog Output Channels279
- Setting the Measuring Method and Ranges of Analog Input Channels282
- Response of the Analog Modules285
- Influence of the Power Supply and Operating State285
- Influence of the Range of Analog Values287
- Influence of Operational Limits and Basic Error Limits288
- Conversion and Cycle Times of Analog Modules289
- Settling and Response Times of Analog Output Channels293
- Programming Analog Modules294
- Parameters of Analog Input Modules294
- Diagnostics of Analog Modules295
- Diagnostics Messages of Analog Input Modules296
- Diagnostic Messages of Analog Output Modules296
- Causes of Error and Troubleshooting at Analog Input Modules297
- Causes of Error and Troubleshooting at Analog Output Modules297
- Interrupts of Analog Modules298
Analog Modules300
- Analog Module Selection and Commissioning Sequence301
- Module Overview302
- Analog Input Modules302
- Analog Output Modules305
- Analog I/O Modules306
- Analog Input Module SM 331; AI 8 X 16 Bit; (6ES7331-7NF00-0AB0)307
- Measurement Types and Ranges313
- Programmable Parameters314
- Additional Information on SM 331; AI 8 X 16 Bit315
- Analog Input Module SM 331; AI 8 X 16 Bit; (6ES7331-7NF10-0AB0)318
- Measurement Types and Measuring Ranges323
- Programmable Parameters324
- Additional Information for SM 331; AI 8 X 16 Bit325
- Analog Input Module SM 331; AI 8 X 14 Bit High Speed; Isochrone; (6ES7331-7Hf0X-0AB0)329
- Measurement Types and Measuring Ranges334
- Programmable Parameters336
- Isochronous Mode337
- Additional Information on SM 331; AI 8 X 14 Bit High Speed, Isochrone339
- Analog Input Module SM 331; AI 8 X 13 Bit; (6ES7331-1KF02-0AB0)340
- Measurement Types and Measuring Ranges348
- Programmable Parameters348
- Additional Information on SM 331; AI 8 X 13 Bit350
- Analog Input Module SM 331; AI 8 X 12 Bit;(6ES7331-7KF02-0AB0)353
- Measurement Types and Ranges362
- Programmable Parameters364
- Additional Information on SM 331; AI 8 X 12 Bit366
- This Optimizes366
- Analog Input Module SM 331; AI 2 X 12 Bit; (6ES7331-7KB02-0AB0)367
- Measurement Types and Measuring Ranges376
- Programmable Parameters378
- Additional Information on SM 331; AI 2 X 12 Bit379
- Analog Input Module SM 331; AI 8 X RTD (6ES7331-7PF01-0AB0)380
- Measurement Types and Measuring Ranges387
- Programmable Parameters389
- Additional Information on SM 331; AI 8 X RTD391
- Analog Input Module SM 331; AI 8 X TC; (6ES7331-7PF11-0AB0)396
- Measurement Types and Measuring Ranges404
- Adjustable Parameters405
- Additional Information on SM 331; AI 8 X TC407
- Analog Input Module SM 331, AI 6 X TC Isolated (6ES7331-7PE10-0AB0)412
- Measurement Types and Measuring Ranges423
- Programmable Parameters424
- Additional Information Relating to SM 331; AI 6 X TC425
- Firmware Update Via HW Config for Analog Input Module SM 331; AI 6 X TC431
- I&M Data for Identifying the Analog Input Module SM 331; AI 6 X TC433
- Calibration of Analog Input Module SM 331; AI 6 X TC434
- Analog Output Module SM 332; AO 8 X 12 Bit; (6ES7332-5HF00-0AB0)442
- SM 332; AO 8 X 12 Bit - Output Ranges447
- Programmable Parameters448
- Additional Information on SM 332; AO 8 X 12 Bit449
- Analog Output Module SM 332; AO 4 X 16 Bit; Isochrone; (6ES7332-7ND02-0AB0)450
- SM 332; AO 4 X 16 Bit - Output Ranges456
- Programmable Parameters457
- Isochronous Mode458
- Additional Information on SM 332; AO 4 X 16 Bit459
- Analog Output Module SM 332; AO 4 X 12 Bit; (6ES7332-5HD01-0AB0)460
- Output Ranges of SM 332; AO 4 X 12 Bit465
- Programmable Parameters466
- Additional Information on SM 332; AO 4 X 12 Bit467
- Analog Output Module SM 332; AO 2 X 12 Bit; (6ES7332-5HB01-0AB0)468
- Output Ranges of SM 332; AO 2 X 12 Bit473
- Programmable Parameters474
- Additional Information on SM 332; AO 2 X 12 Bit475
- Analog IO Module SM 334; AI 4/AO 2 X 8/8 Bit; (6ES7334-0CE01-0AA0)476
- SM 334; AI 4/AO 2 X 8/8 Bit - Function Principle482
- Measurement and Output Type of SM 334; AI 4/AO 2 X 8/8 Bit482
- Measurement and Output Ranges of SM 334; AI 4/ AO 2 X 8/8 Bit483
- Additional Information on SM 334; AI 4/AO2 X 8/8 Bit483
- Analog IO Module SM 334; AI 4/AO 2 X 12 Bit; (6ES7334-0KE00-0AB0)484
- Programmable Parameters490
- Measurement Types and Ranges490
- Output Ranges491
- Additional Information on SM 334; AI 4/ AO 2 X 12 Bit492
- Unused Channels492
- Always Short-Circuit Unused Input Channels, and Connect These to M492
- Interference Immunity of the Analog Input Module492
Other Signal Modules493
- Module Overview493
- Simulator Module SM 374; IN/OUT 16; (6ES7374-2XH01-0AA0)494
- Dummy Module DM 370; (6ES7370-0AA01-0AA0)496
- Position Decoder Module SM 338; POS-INPUT; (6ES7338-4BC01-0AB0)499
- Isochronous Mode500
- Wiring and Block Diagrams501
- Functions of SM 338; POS-INPUT; Encoder Value Acquisition502
- Encoder Value Acquisition502
- Gray Code/Binary Code Converter502
- Transferred Encoder Value and Scaling503
- Freeze Function504
- Parametrization SM 338 POS-INPUT505
- Addressing SM 338 POS-INPUT507
- Diagnostics of SM 338; POS-INPUT509
- SM 338; POS INPUT - Interrupts511
- Technical Data of SM 338; POS-INPUT512
Interface Modules515
- Module Overview515
- Interface Module IM 360; (6ES7360-3AA01-0AA0)516
- Interface Module IM 361; (6ES7361-3CA01-0AA0)518
- Interface Module IM 365; (6ES7365-0BA01-0AA0)520
Parameter Sets of Signal Modules522
- Principles of Programming Signal Modules in the User Program522
- Parameters of Digital IO Modules524
- Parameters of the Digital Input Module SM 321; DI 16 X DC 24/125 V526
- Parameters of Digital Output Modules528
- Settings from the Digital Output Module SM 322; DO 16 X DC 24 V/0.5 a (6ES7322-8BH10-0AB0)530
- Parameters of Analog Input Modules534
- Parameters of Analog Input Module SM 331; AI 8 X RTD538
- Parameters of SM 331; AI 8 TC548
- Parameters of Analog Input Module SM 331; AI 8 X 13 Bit557
- Measuring Ranges559
- Setting of the Analog Input Module SM 331; AI 8 X 16 Bit (6ES7331-7NF10-0AB0)560
- Parameters of Analog Input Module SM 331; AI 6 X TC Isolated567
- Parameters of Analog Output Modules574
- Parameters of Analog Output Module SM 332; AO 8 X 12 Bit577
- Parameters of Analog IO Modules580
Diagnostics Data of Signal Modules583
- Evaluating Diagnostic Data of Signal Modules in the User Program583
- Structure and Content of Diagnostics Data, Byte 0 and up584
- Channel-Specific Diagnostics Data588
- Diagnosis Data from the SM 322; DO 16 X DC24 V/0.5 a (6ES7322-8BH10-0AB0)590
- Diagnostics Data of SM 331; AI 6 X TC Isolated593
- Diagnostics Data of SM 338; POS-INPUT596
Dimensional Drawings598
- Dimensional Drawings of the Mounting Rails599
- Bus Modules605
- Dimensional Drawings of the Power Supply Modules606
- Dimensional Drawings of the Interface Modules610
- Dimensional Drawings of the Signal Modules612
- Dimensional Drawings of Accessories614
Spare Parts and Accessories for S7-300 Modules616
Directive on Handling Electrostatic-Sensitive Devices (ESD)619
- Definition of ESD619
- Electrostatic Charging of the Body620
- Basic Protective Measures against Electrostatic Discharge621
Service & Support622
Safety-Relevant Symbols623
- Safety-Related Symbols for Devices Without Ex Protection623
- Safety-Related Symbols for Devices with Ex Protection624
List of Abbreviations626
- Glossary628
- Index638

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)

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