A switch A is used to turn on two lamps. Another switch B is used to turn off the lamps. In addition, there is another switch C located in different location which could be used to turn on the lamps. Using switch A, the lamp will turn on immediately. However, using the switch C, the lamp will turn on 3 second after the pushbutton is pressed. The lamp will turn off after 10 seconds the respective switch (C) is triggered. Develop a PLC program and draw the ladder diagram to control the lamps based on the described situation.

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.