Three places to control one motor

The control (operation) of one motor in two or more places is often called "multi-point control". The circuit as shown in the figure can control a motor from three locations. In the figure, ST is the start button and STP is the stop button. ST1 and STP2 are the control buttons at the first location; ST2 and STP2 are the control buttons at the second location; ST3 and STP3 are the control buttons at the third location. To achieve multi-point control, the key to circuit connection is: start buttons in parallel and stop buttons in series.