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5 LF45/55 series Reading circuit diagrams READING DIAGRAMS 3-5 Symbol number Description 1 Loudspeaker 2 Electropneumatic or hydraulic valve, 1 driving coil 3 Electropneumatic or hydraulic valve, 2 driving coils 4 Electropneumatic or hydraulic valve, 3 driving coils 5 Diode 6 Bipolar diode 7 LED 8 LED with series resistor 9 4-position switch, key-operated 10 3-position switch with fixed central position, manually operated, spring return 11 Dual 3-position switch with fixed central position, manually operated, spring return 12 Potentiometer with series resistor 13 Potentiometer without series resistor 14 Dual switch; one 2-position switch, manually operated, changeover contact, one 2-position switch, manually operated, contact normally open 15 Dual switch; one 2-position switch, spring return, contact normally open, one 3-position switch, fixed central contact, spring return, changeover contact 16 2-position switch with fixed 0-position, spring return, contact normally open 17 Through-connection 18 Relay with changeover contact 19 Relay with changeover contact 20 Switch, pressure-controlled, dual break, contact normally closed 21 Switch, pressure-controlled, dual break, contact normally open 22 Switch, temperature-controlled, single break, contact normally closed 23 Switch, mechanically operated, dual break, contact normally closed 24 Switch, mechanically operated, dual break, contact normally open 25 Pressure - voltage converter 26 Temperature - voltage converter 27 Revs - pulse converter 28 2-position switch, single break, contact normally open, foot-pedal-operated 7 200440 |