Electropneumatic systems combine pneumatic actuators and controllers with electric control circuits. Pneumatic actuators include cylinders, motors, and valves, which are powered by compressed air. However, the electric control circuits use electrical components like switches, relays, and programmable logic controllers to control the flow of compressed air and automate pneumatic processes. While pneumatic systems can be complicated to control, electropneumatic systems simplify control with digital electric signals regulating complex pneumatic circuits and multiple actuators.

1. INTRODUCTION TO
ELECTROPNEUMATIC
Aditya@poltekom.ac.id

2. KONTRAK PERKULIAHAN
1. Laporan praktikum pada tiap akhir praktikum
2. Laporan praktikum yang diakui adalah laporan praktikum yang
menggunakan tulisan tangan (handwriting)
3. Laporan praktikum berisikan tentang :
A. Diagram langkah (motion displacement diagram)
B. Electric circuit
C. Pneumatik circuit
D. Component description
4. Tugas paper (makalah) dibebankan kepada mahasiswa yang mendapatkan
nilai D dan E pada UTS dan atau UAS
Aditya@poltekom.ac.id

3. Definition
• Electropneumatic is a system / tools that is
worked using the air pressure / air flow but
controlled using electrical devices
Actuator : Pneumatic
Controller : Electric circuit

4. Comparison
Pneumatic Electric
Complicated Control Simplicity Simple
Using > 1 logic valve 1 device
(many devices)

5. Comparison
Pneumatic Electric
Few Development Many
Logic valve Timer
Stepper module Counter
Timer valve Digital logic
Counter valve HMI connection
Fuzzy control
SCADA

6. Comparison
Pneumatic Electric
Slow Signal delivery Fast
Max Max

7. Comparison
Pneumatic Electric
Cylinders Motors, linear motor
Directional valve Transistors/contactors/
relays
Logic valves
Op amps
Button valve
Button / switch
Air pressure Battery

9. Pneumatic elements
Single acting cylinders
Double acting cylinders
Rodless cylinder
Pneumatic motor

10. WORKING ELEMENTS / ACTUATING DEVICES
Single / double acting cylinder

11. SINGLE ACTING CYLINDER
Forcible surface
Spring return
DEpressurized chamber
Pressurized
chamber
Air pressure port Exhaust port /
/ supply port waste port

12. SINGLE ACTING CYLINDER
Forcible surface
Air pressure port
/ supply port

13. DOUBLE ACTING CYLINDER
Forcible surface
Spring return
DEpressurized chamber
Pressurized
chamber
Air pressure port / supply port Air pressure port / supply port
+ Exhaust port / waste port + Exhaust port / waste port

14. DOUBLE ACTING CYLINDER
Forcible surface
Air pressure port / supply port Air pressure port / supply port
+ Exhaust port / waste port + Exhaust port / waste port

15. CONTROL ELEMENTS / ACTUATING DEVICES
Logic Valves / Directional valves

16. Two pressure valve

17. Shuttle valve

18. M/n valves
M : Number of ports
N : Number of direction set / position

19. Valve nomenclature

20. Port designation (ISO-5599-3)

21. Actuation option

22. Actuation option

23. Actuation option

24. Actuation option

25. Non return valves

26. Linear actuators

27. Single acting direct actuating

28. Double acting direct actuating

29. Component designation

30. Component designation

31. System circuit diagram

33. Solenoid principles (supply power)

34. Solenoid principles (Coil & core)
When an electric current flows through a coil, a magnetic field is generated.
The following applies to strengthen the magnetic field:
1. Increasing the number of windings (1loop, 2 loop, 3 loop, etc)
2. Increasing the strength of the current (1 A, 2A, etc)
The following applies to the weaken the magnetic field:
1. Lengthening the coil reduces the field. (the soft iron core length)

35. Electropneumatic elements
Solenoid valves
PE converter (Pneumatic to Electric signal converter)
Magnetic proximity switch

36. Solenoid valves NO
n/n valves

37. Solenoid valves NC
n/n valves

38. Piloted solenoid valves
n/n valves

39. Piloted solenoid valves zoom
n/n valves

40. Solenoid valves 5/n piloted
n/n valves

41. Solenoid valves 5/n double solenoid piloted
n/n valves

42. PE Converter
n/n valves

43. Magnetic proximity switch

44. Magnetic proximity switch
Move cylinder

45. Electronic elements
Switches
Relays

46. Switches

47. Relays