1. Electromagnetic Relays

3. Contactors

4. Contactor example

5. Magnetic Motor Starter

6. Motor starter Example

7. Overload Relay

8. Overload Relay Connection Diagram

9. Manually Operated Switch Symbols

10. Manually Operated Switch

11. Proximity sensor

13. Proximity connection to Input module

14. Pressure sensors

16. Temperature sensors Thermocouple RTD (resistance temperature detector): made of pure metal Thermistor: Made with ceramic or polymer materials IC sensor

17. Temperature Sensor

18. Example of Temperature Sensor wiring Diagram

19. Magnetic sensors (Reed switches)

20. Light sensors Photovoltaic cell (solar cell) Photoconductive cell Photoelectric sensor Diffused-reflective Retro reflective Through-beam

21. Photovoltaic cell

22. Photoconductive cell

23. Photoelectric Sensors( Diffuse-reflective, retro-reflective, separate type)