Section 2, Application Question on PLC Question 2 Q2. A programmable logic controller (PLC) is used to control Stamping machine actuated by a hydraulic cylinder. a) For Safety purpose, Two push button are used to activate the cylinder and a NPN photodiode sensor with three wires is used to limit the cylinder rod movement. Sketch and label the electrical circuit connecting the PLC input and output terminals to the push buttons, the sensor and the directional solenoid valve. (20marks) b) A programmable logic controller (PLC) is used to control a DC motor which drives a conveyor. Construct a ladder diagram that will stop the motor after photo sensor detecting 30 products passing on the conveyor and activate the motor again after 50 seconds stop. (20marks) 1 Add file Section 2, Application Question on PLC Question 2 Q2. A programmable logic controller (PLC) is used to control Stamping machine actuated by a hydraulic cylinder. a) For Safety purpose, Two push button are used to activate the cylinder and a NPN photodiode sensor with three wires is used to limit the cylinder rod movement. Sketch and label the electrical circuit connecting the PLC input and output terminals to the push buttons, the sensor and the directional solenoid valve. (20marks) b) A programmable logic controller (PLC) is used to control a DC motor which drives a conveyor. Construct a ladder diagram that will stop the motor after photo sensor detecting 30 products passing on the conveyor and activate the motor again after 50 seconds stop. (20marks) 1 Add file