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Electro-Pneumatics

Definition
It is the use of Electrical signals to control Pneumatic systems

Applications of Electro-Pneumatics
• Filling
• Packaging
• Handling of work pieces
• Stamping
• Metal forming
• Automation processes
• Modern industries

Advantages of Electro-Pneumatics
• Cheap
• Greater reliability
• Easy handling
• Simple installation
• Easily modified and adapted
• Secure mounting
• Environmentally friendly


Examples of signal input in electro-pneumatic systems
Pushbutton switches
Limit switches
Sensors

Examples of signal processing in electro-pneumatic systems
Relays
Contactor
PLC

Examples of signal output in electro-pneumatic systems
5/2 single solenoid valve
5/2 double solenoid valve


Examples of command execution in electro-pneumatic systems
Cylinders
Motors
Optical display

Electro-Pneumatic components
DC power supply
Switches
Relays
Sensors
Solenoid valves

Types of electric current
Direct current DC
Alternating current AC

Power supply
It is used to convert the 230 V AC into 24 V DC

Main component of the power supply
1- Transformer used to reduce the voltage from 230 V to 24 V
2- Rectifier used to convert the current from AC into DC
3- Stabilizer used to smooth and maintain constant voltage at the output


Switches
They are used to connect and interrupt the electric current

Types of switches
1- Pushbutton switches
2- Control (Detent) switches
3- Limit switches

Types of contact points (switches)
1- N/O switches
2- N/C switches
3- Changeover switches


Relay
It is an electromagnetic switch and it has a coil and some contact points

Advantages of the relays
1- it can be used to switch one or more contacts
2- it is used to switch a high current with a low current circuit