Question: (a) Write the Boolean logic expressions for the push-button switch of Example 9.2 using the following symbols: X1 = START, X2 = STOP, P =

(a) Write the Boolean logic expressions for the push-button switch of Example 9.2 using the following symbols: X1 = START, X2 = STOP, P = POWER@TO@MOTOR, and M = MOTOR. Hint: See Figure 9.4(b).

IPLE 9.2 Push-Button Switch A push-button switch used for starting and stopping electric motors and other powered devices is a common hardware component in industrial control systems. As shown in Figure 9.4(a), it consists of a box with two buttons, one for START and the other for STOP. When the START button is depressed momentarily by a human operator, power is supplied and maintained to the motor (or other load) until the STOP button is pressed momentarily, which breaks the power to the POWER-TO-MOTOR. POWER-TO-MOTOR is the output of the push-button switch, but it also serves as a contact to power the motor. (a) Define the initial values of the variables. Construct (b) the truth table for the push button and (c) the logic network diagram

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