G. Prede, D. Scholz / Дж.Преде, Д. Шольц - Electropneumatics. Basic Level / Электропневматика. Базовый уровень [2002, PDF, ENG]

Contents ............................................................................................ 1
Preface ............................................................................................ 4
Chapter 1 – Introduction ...................................................................... 5
1.1 Applications of pneumatics............................................................... 6
1.2 Basic control engineering terms ....................................................... 8
1.3 Pneumatic and electropneumatic controllers ................................. 14
1.4 Advantages of electropneumatic controllers .................................. 17
Chapter 2 – Fundamentals of electrical technology........................ 19
2.1 Direct current and alternating current ............................................. 20
2.2 Ohm's Law...................................................................................... 22
2.3 Function of a solenoid .................................................................... 24
2.4 Function of a capacitor ................................................................... 26
2.5 Function of a diode......................................................................... 27
2.6 Measurement in electrical circuits .................................................. 28
Chapter 3 – Components and assemblies in the electrical signal control section.................................... 35
3.1 Power supply unit ........................................................................... 36
3.2 Push button and control switches................................................... 37
3.3 Sensors for measuring displacement and pressure ....................... 39
3.4 Relays and contactors.................................................................... 49
3.5 Programmable logic controllers...................................................... 55
3.6 Overall structure of the signal processing part ............................... 56
Chapter 4 – Electrically actuated directional control valves...........59
4.1 Functions ........................................................................................60
4.2 Construction and mode of operation...............................................62
4.3 Types and pneumatic performance data ........................................74
4.4 Performance data of solenoid coils.................................................83
4.5 Electrical connection of solenoid coils ............................................86
Chapter 5 – Developing an electropneumatic control system........89
5.1 Procedure for developing a control system.....................................90
5.2 Project design procedure ................................................................92
5.3 Sample application: project design of a lifting device .....................96
5.4 Procedure for implementing the control system............................109
Chapter 6 – Documentation for an electropneumatic control system................................113
6.1 Function diagram..........................................................................115
6.2 Function chart ...............................................................................119
6.3 Pneumatic circuit diagram.............................................................127
6.4 Electrical circuit diagram...............................................................144
6.5 Terminal connection diagram........................................................158
Chapter 7 – Safety measures for electropneumatic control systems..............................169
7.1 Dangers and protective measures ................................................170
7.2 Effect of electric current on the human body ................................172
7.3 Measures to protect against accidents with electric current .........175
7.4 Control panel and indicating elements..........................................176
7.5 Protecting electrical equipment
against environmental influences..................................................181
Chapter 8 – Relay control systems ................................................. 185
8.1 Applications of relay control systems in electropneumatics ......... 186
8.2 Direct and indirect control............................................................. 186
8.3 Logic operations ........................................................................... 189
8.4 Signal storage .............................................................................. 192
8.5 Delay ............................................................................................ 198
8.6 Sequence control with signal storage
by double solenoid valves ............................................................ 199
8.7 Circuit for evaluating control elements ......................................... 208
8.8 Sequence control for a lifting device ............................................ 211
Chapter 9 – Design of modern
electropneumatic control systems ............................. 235
9.1 Trends and developments in electropneumatics.......................... 236
9.2 Pneumatic drives.......................................................................... 237
9.3 Sensors ........................................................................................ 245
9.4 Signal processing ......................................................................... 246
9.5 Directional control valves ............................................................. 247
9.6 Modern installation concepts........................................................ 251
9.7 Reducing tubing effort .................................................................. 261
9.3 Reducing wiring effort................................................................... 261
9.9 Proportional pneumatics............................................................... 270
Appendix ........................................................................................ 279
Index.................................................................................................... 281
Standards............................................................................................ 291