Limit Switch Motor Control Circuit

A circuit which enables a user to linearly control the speed of a connected motor by rotating an attached potentiometer is called a motor speed controller circuit.

Limit switch motor control circuit.

It has three terminals. Micro limit switches are much smaller in size than an ordinary limit switch. It is abbreviated com the other terminals are the normally open no. In this particular case i show a low voltage control circuit and a 3 phase higher voltage motor.

A limit switch is an electromechanical device that consists of an actuator mechanically linked to a set of contacts. In electrical engineering a limit switch is a switch operated by the motion of a machine part or presence of an object. They are used for controlling machinery as part of a control system as a safety interlocks or to count objects passing a point. Simulate this circuit schematic created using circuitlab.

You have to figure up down and appropriate diode polarity. The class of proximity switches operates by the disturbance of an electromagnetic field by capacitance or by sensing a magnetic field. Switch stops motor at limit and diode allows reversing of motor. Rarely a final operating device will be directly controlled by the contacts of an industrial limit switch but more typically the limit switch will be wired through a control relay a motor contactor control circuit or as an input to a programmable logic.

The power input terminal is called the common terminal and is used to connect the switch to a power source. Not sure of polarities on diodes. Insert this into either black or white wire going to the motor. Another type of limit switch often used in different types of control circuits is the micro limit switch or microswitch.

A limit switch is used to control electrical devices by breaking and completing electrical circuits. This permits them to be used in small spaces that would not be accessible to the larger device.