1. Chapter 2 FUNDAMENTALS OF PLC PROGRAMMING Industrial Electronics DEK 3113

7. Normally Open Schematics (NO)-Input Schematics

8. Normally Closed Schematics (NC)-Input Schematics

9. Output Schematics

12. Logic Function…cont - AND

16. Logic Function…cont - NOR

18. Logic Function…cont - NAND

19. Logic Function…cont - NOT

21. Combination of AND , OR , and inverter (NOT) gates

23. Vibrating/Jog circuit -When, PB is pressed, output IR is activated. -But after several microsecond, the normally closed IR is open then will stop the output IR. -This applicable to move an object which need to locate at precise location.

25. Control circuit has Overload Protection Device

26. Control circuit in ladder diagram. -When PB is pushed(forward/reverse),motor will move according to the command. -But, when there is an overcurrent,CB will stop the current flow by blow the fuse. -Means, NC of CB will open and stop the current flow to the circuit. -The circuit can be recovered by change the fuse. -If there is thermal overload, TOR will cut the current flow. -Lamp,L3 will turn on and TOR need to be reset.

27. Two wire control -only has one contact for switching device either ON or OFF state. -When ON state, M will energize and activate three phase motor. -Heater will heat if there is over current and open the circuit.

28. Three wire control -the connection almost the same as two wire circuit except has an extra set of contact connected in parallel as the pilot switch. -this extra contact provide extra third wire. -this auxiliary contact keep coil M energize even after start push button release.

30. Thank You & Have A Nice Day