Wiring Heater to PLC

1. Example Heater : 
CAST - IN HEATER ( ILF )

2. Example Temperature Sensor : 
A wide Variety of High-precision Temperature Sensor

3. Example Digital Temperature Controller :
Basic-type Digital Temperature Controller
E5CN/E5CN-U ( OMRON )

4. Example Heater Element Burnout Detector : 
K2CU-F Series ( OMRON )

5. Example Contactor : 

Wiring Heater, Temperature Sensor, Digital Temperature Controller, Heater Element Burnout Detector, Contactor to Input / Output PLC

(source: www.program-plc.blogspot.com)