Festo Electrical, Pneumatic and Logic Symbols

Electrical, pneumatic and logic symbols

Energy conversion

Compressor

Constant displacement pump

Transfer of ener gy Line

Flexible line

Pressure source – pneumatic

Pressure source – hydraulic

Valves Directional control valves

Actuation methods Manual operation

General

Via push button

Via pull

Via lever

Via pedal

Mechanical actuation Variable displacement pump

Pneumatic fixed displacement motor

Hydraulic motor, adjustable, with one direction of flow

Vacuum pump

Pneumatic fixed displacement motor with two directions of flow

Hydraulic motor, adjustable, with two directions of flow

Line connection

Crossing line

Closed exhaust port

Silencer

Via spring

Via roller

Air outlet with connection facility

Air outlet without connection facility

Pressure connection point, closed

Quick coupling, connected

Pneumatic motor with restricted angle of rotation

Via stem

Rotary connection with one path

Quick coupling with mechanically opening non-return valves, connected

2 (A)

2 (A)

1 (P) 2/2-way valve, normally closed position

1 (P) 2/2-way valve, normally open position

2 (A)

Roller lever in one direction only under tension

1 (P) 3 (R) 3/2-way valve, normally closed position

1 (P) 3 (R) 3/2-way valve, normally open position 4 (A)

2 (A)

4 (A)

Double-acting pneumtic cylinder

Single-acting pneumatic cylinder, return movement via spring

Double-acting pneumatic cylinder with adjustable cushioning at both ends

Double-acting pneumatic Telescopic hydraulic cylinder with through cylinder piston rod

Pressure intensifier for two different media

Pressure medium converter

Quick coupling, disconnected, line closed

Quick coupling, disconnected, Line open

Filter Shut-off valve (simplified representation)

Filter with water separator, manually operated

2 (B)

Direct via pneumatic actuation

Via differential Spring centered pressure actuation

4 (A)

Cooler with volumetric flow lines to show flow direction of coolant

Via solenoid with one active coil

Via solenoid, e. g. with two counteracting solenoids

Via electric stepper motor

1 (P) 3 (R) 4/3-way valve, mid-position closed

Combined actuation

Via solenoid or manual operation

Via solenoid or manual override and pilot valve

4 (A)

2 (B)

4 (A)

3 (S) 1 (P) 5/2-way valve

5 (R)

Detent

Over-centre device

Service unit Reservoir (simplified representation)

Temperature sensor

Pressure gauge

Temperature gauge

Connection designations

Back pressure nozzle

Nozzle in general, sender nozzle for air barrier

Fluid level gauge

Tachometer

Receiver nozzle (with air supply) for air barrier

Pneumatic proximity switch, actuated by permanent magnet

ISO/ for 2/2DIS and 11727 3/2-way valves 1 P 2 A 3 R – 4 – 5 10* Z Z 12 – 14

for 4/2and 4/3-way valves P B R A – – Y Z

for 5/2and 5/3-way valves P B S A R – Y Z

* Control port, on valves with normally open position (NOT function)

053 614 GB © Festo Didactic GmbH & Co. www.festo.com/didactic

Directional control valve with intermediate switching positions and two end positions

Equation

E 0 1

A 0 1

A=E

E 0 1

A 1 0

A=E

Representation to ISO 1219/1 pneumatic

Symbol to DIN 40900/12

1

E

Representation to DIN EN 60617-7 electrical

A

A

E

E

1

E

A

A

A

E

E

E1 E2 0 0 0 1 1 0 1 1

A 0 1 1 1

A=E1∨E2

E1 E2 0 0 0 1 1 0 1 1

A 0 0 0 1

A=E1∧E2

E1 E2 0 0 0 1 1 0 1 1

A 0 0 1 0

A=E1∧E2

E1 E2 0 0 0 1 1 0 1 1

A 1 0 1 1

A=E1∨E2

E1 E2 0 0 0 1 1 0 1 1

A 1 0 0 0

A=E1∨E2

E1 E2

≥1

A

A

A

E1 E1

Implication

2-way flow control valve

Flow control valve, adjustable, any actuation

Flow divider

Nor

Flow control valve, adjustable, mechanical actuation against spring

A

E1 E2

&

A

A E1

E1 E2

E2

A

E1 E2

&

A

A E2

E1 E2

E1

A

3 (R)

2 (A)

1 (P) Pressure relief valve, adjustable

Nand

1 (P) Pressure sequence valve with exhaust, adjustable 2 (A)

Memory

Non-return valve Non-return valve Non-return valve without spring with spring

Timer

Dual-pressure valve

– adjustable – Switch-on delayed

A

A

E1

Shuttle valve

One-way flow control valve, adjustable

E1 E2 0 0 0 1 1 0 1 1

S 1 0 0 0 E 0 1 1

R 0 0 1 0

A

E2

E1 E2

≥1

A

A

E1

t expired

0 0 1

E2

K1

K

A 1 1 1 0

A 1 1 0 0

E2

E1

A=E1∧E2

E1 E2

&

A

E2 A

A

E1

K1

E2

B 0 0 1 1 A 0 0 1

R S

R S

K

E2 AB

B A S

A

S

K K

R

R

B A

K

E

t1

A

A

E K

E

A P R

Timer Quick exhaust valve

≥1

E1

1 (P) 3 (R) Pressure regulating valve, relieving type, adjustable

1 (P) Pressure regulating valve, non-relieving, adjustable

E1 E2

E1

Pressure valve

E2

E2

Flow control valve

2 (A)

Special symbols

Reflex sensor

Inhibition

Lubricator

Dryer

Flow meter (volume)

And

2 (B)

3 (S) 1 (P) 5/3-way valve, mid-position closed

General explanatory symbol

Pneumatic linear unit

Flow meter (flow)

2 (B)

1 (P) 3 (R) 4/3-way valve, mid position working lines exhausted

Flow control valve with constant restriction

Mechanical actuating components Other symbols Other devices

Or

Electrical actuation

Via solenoid and pilot valve Cooler without volumetric flow lines to show flow direction of coolant

Negation

Pressure actuation

Via electric motor with continuous rotation

Filter with water separator, automatic

Identity

Function table

2 (B)

1 (P) 3 (R) 4/2-way valve

5 (R)

Single-acting pneumatic cylinder, return movement via external force

Designation

2 (A)

1 (P) 3 (R) 3/3-way valve, mid-position closed

Actuated in initial position

Comparison of logic elements

– adjustable – Switch-off delayed

E 0 1 0

t expired

0 0 1

A 0 1 0

E

t2

A

A

E K

E

A P R