Published:2011/7/9 23:09:00 Author:Lucas | Keyword: Three-phase motor, proximity switch | From:SeekIC
Just as shown in the circuit, 1SQ and 2SQ both are the non-contact new transistor proximity switch. And STF and STR are respectively forward and reverse button switches. When STF is pressed, KMF pulls to drive the motor to run forward. When it is to a qualified location, the metal plate on the machine rises to close the 1SQ and its internal contacts disconnect to drive the KMF coil to lose power. Then the motor stops. Compared to mechanical limit switch, non-contact transistor proximity switch has better performance, more reliability and longer service life.
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