Controlling dc motor controller with RC

 use this motor control for industrial use. 

http://www.automationdirect.com/adc/Shopping/Catalog/Drives/DC_Drives/High_Voltage_(%3E_50V)_Open_Frame_Auto_Reversing/GSD7-240-10CR30

It uses a 5k Pot for speed control. Was wondering what is the best way to be able to use an RC remote with this DC drive? Needs to be robust. Spending a few dollars for longevity would be fine.

Any thoughts would be appreciated!

Thanks