![]() PLC performs functions that formerly required – relays relays, solid state electronic, mini computers. PLC are solid state device designed to perform logical decision making for control applications in industries. W h en main mai n i s pre pr essed : - process stop PROJECT : 2 When toggle switch is not pressed When toggle switch is pressed MODULE : 2 PLC : Programmable Logic Controller PLC is a digital computer used for automation of typically industrial electromechanical electromechanical processes such as control of machinery on factory assembly lines or light fixtures, etc. motor rotates in forward W h en on2 on 2 i s pr essed : - motor rotates in reverse direction. W h en on1 on 1 i s pr essed : direction. on1 : limit switch 1(NO) on2 : limit switch 2 (NO) main : used to stop the process (NC) r1 : relay 1 r2 : relay 2 C1 ,C2 : contactor coils 1,2 Here I use vfd for 3 phase supply hence by vary the frequency of vfd I can vary the speed of motor. Types of sensors:PNP :- output is 24V NPN :- output is 0V Universal:- output is 24V and 0V PROJECT : 1 Circuit to reverse the direction of conveyor motor by two limit switches attached at two ends of conveyor belt. A sensor is a device that detects events or changes in quantities and provides a output, generally as electrical or optical signal. SE N SOR ::Convert physical Quantity to electrical signal. Used for garage door to open or off motor. They used to define the limit of travel of an object Hence called as LIMIT SWITCH. They determine the presence or absence, passing, positioning and end of travel of an object. When an object comes into contact with the actuator, the device operates the contacts to make or break an electrical connection. Interlocking Circuit: simulation L i mit Sw Swi tc tch: h: It is an electromechanical device that consists of an actuator mechanically linked to a set of contacts. SOFTWARE: A u to toma mati tio on Stu tud di o It is used to design circuit circuit and simulation. TYPES OF RELAY: Single Pole : 1NC,1NO,1C Double Pole : 2NC,2NO,2C Triple Pole : 3NC,3NO,3C CONTACTOR : When a relay is used to switch a large amount of electrical power through its contacts it is designated by a special name contactor. Ser i es two in i n puts pu ts to one outpu ou tputt : It acts as the AND gate. Par Par all al l el two i n pu ts to one output : It acts as the O R gate. All indicators are glow with same brightness. Here, on pressing push button all outputs are on. In parallel circuit voltage is same but current is different. ![]() Parallel circuit : In this circuit we have one input and three outputs in parallel. But due to voltage drop last indicator is glow dim. In series current is same but voltage is different. I have worked on 24V and 220V indicators BASIC CIRCUITS Ser i es cir cui t : In this circuit we have one input and three outputs in series. They are of different types based on voltage. INDICATORS I ndicato ndicatorr L amps mps: A device for showing the operating condition( whether power is on or off) of some system. mer gen gen cy stop Swi Switch tch E mer : These are used to stop equipment and facilities in emergency. ![]() oggl e Switch wi tch T oggl : It is use to connect or disconnect the electric circuit. If we stop applying force then the circuit circuit will become become inactive again as initial state. NO and NC. Push NC. Push Button is that button button which activates activates electric circuit when pushed. Roll No.CUN110103035 ELECTRICAL AND ELECTRONICS MODULE-1 BASIC COURSE TYP TYPES ES OF SWI TCH ES : They are manually operated Push Push B uttons switches. SIX MONTHS INDUSTRIAL TRAINING AT NFI – Industrial Industrial Automation Training Academy Zirakpur, Ambala-Chandigrah Road, Distt.Mohali NAME:PANKAJ KUMAR PUNDIR Univ. ![]()
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