Double-click on the header module to open its properties. 
Click on the "Parameter" tab to open a menu selection for defining the  
port functions and diagnostic functions. 
 
 
Note 
IO-Link configuration: 
If the connected IO-Link device needs additional power over pin 2, pin 2 must be 
configured to output on the corresponding port. 
Standard input and output: 
For each port, the function (N.C., N.O., diagnostic input (pin 2)) can be arbitrarily 
selected for each port at pin 2 and pin 4.