Electro pneumatic system

What is electro-pneumatic system ?

• Pneumatic is a system that is worked using the air pressure or air flow

• pneumatic is a system that is worked using fluid

• pneumatic is a system that is worked using the air pressure or air flow but

  controlled using electrical devices

• Pneumatic is a system that is worked using the air pressure or air flow but

  controlled using chemical fluid

The electro pneumatic system is normally consists of

• DC power supply

• Solenoid valve

• Hydraulic pump

• Relay

Figure shown the electro-pneumatics circuit to be operated. And to be able to extend the piston rod of a cylinder , if only :-

• Push button S1 is not pressed, the solenoid valve switches to the actuated position. The piston rod extend.

• At least one of the two push buttons is pressed, the solenoid valve switches to the actuated position. The piston rod advances.

• Push button S2 is pressed, the solenoid valve remains in the normal position. The piston rod is retracted.

• Both push buttons S1 and S2 must be pressed simultaneously, the solenoid valve switches to the actuated position. The piston rod advances.

Choose the circuit symbol of pneumatic vane motor with unidirectional rotation

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Which of the figure is solenoid valve ?

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Which one of the symbols refer to 3/2 way solenoid valve ?

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Which of the following electrical diagram could operate the system in this figure ?

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What is name of this symbol ?

• 3/2 way solenoid valve (Normally closed)

• 3/2 way solenoid valve (Normally open)

• 3/2 way valve (Normally closed)

• 3/2 way valve (Normally open)

What is name of figure shown ?

• Relay

• Indicator light

• Flow control

• Electrical limit switch

Which of the following diagram is direct actuation ?

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