This upgrade activates the C125/C127 inputs and outputs. It allows the ability to:
Wire sensors into the C125/C127.
Use 2 digital and 3 speed inputs. 
Use 4 auxiliary outputs.
ENSURE YOUR SERIAL NUMBER IS ACCURATE. THIS CODE IS NOT REFUNDABLE AND CANNOT BE MOVED TO A DIFFERENT SERIAL NUMBER AFTER ORDERING
 
IF NEW DISPLAY, ENTER NEW IN SERIAL COMMENT