If my customer is requesting to use a 610 for their Expo KDS unit, will it be necessary to sell a controller?
If you are using the WS610 as a KDS, you do not need to sell the controller.
And if you are planning to make use of touchscreen input, you also do not need to sell a bump bar.
However, do take note that Simphony must be on version 2.7 MR3 and above in order to support WS610 (Windows 8.1)
The WS610 part number to use in your case should be 7116605.