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Pneumatic Control Schematic Symbols
Schematic Symbols as Specified in DIN ISO 1219
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Simple action cylinder, return movement provided by external force |
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Simple action cylinder, return movement provided by built-in spring |
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Double action cylinder with unidirectional piston |
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Double action cylinder with push-pull piston |
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Miscellaneous manual control |
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Manual control with push-button |
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Manual control with lever |
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Manual control with pedal |
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Mechanical push-button control |
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Mechanical spring control |
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Mechanical control with wheel |
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Compressed air control |
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Electromagnet control |
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Control via electromagnet and pneumatic pilot valve |
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Pressure source |
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Pressure source |
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Vent (without piping) |
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Vent (with piping) |
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2/2 directional control valve 1->2, initially closed |
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2/2 directional control valve 1->2, initially open |
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3/2 directional control valve 1->2, initially closed |
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3/2 directional control valve 1->2, initially open |
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3/3 directional control valve 1->2, all outlets closed in centre position |
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5/2 directional control valve |
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5/3 directional control valve 1->2, all outlets closed in centre position |
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Flow-control valve |
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Flow-control valve (adjustable) |
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Return valve |
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Return valve (pilot controlled) |
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Shut-off valve (simplified view) |
Boolean Functions
| Boolean function | Name | Mathematical formula | Logic symbol as per DIN 40700 or circuit symbol as per DIN 40713 |
| Negation | NOT |   |
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| Conjunction | AND |   |
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| Disjunction | OR |   |
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Electrical Symbols as per DIN EN 60617
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Normally open push-button |
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Normally closed push-button |
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Changeover push-button, shown left in deactivated and right in activated state (as indicated by double arrow) |
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Normally open switch (switch latches in position) |
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Reed switch |
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Limit switch (normally open) |
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Limit switch (normally closed) |
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Limit switch (normally open, in activated state) |
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Limit switch (normally closed, in activated state) |
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Relay or contactor |
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Relay (delayed activation) |
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Relay (delayed release) |
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Indicator lamp |
