PID temperature control using a relay

Hi, 

I would like to control the temperature of a heating tape using a relay and a PID type controller in labview 2009. The temperature is measured with a K-type thermocouple connected to a NI9211 module. The relay is connected to a NI9481 module. Both modules are inserted in a NI cDAQ-9184. I am looking for the simplest way to perform this operation.

Thank you in advance for your help.