Select ProXR series controllers that contain UXP in the part number include a UXP expansion port. These controllers have different firmware that support compatible UXP expansion boards, allowing you to add Contact Closure Inputs, Potentiometer Outputs, and High-Resolution Analog to Digital Converters. This section of our tutorial will demonstrate each of the expansion boards, and the commands associated with these expansions. Please note that only one type of expansion is permitted on the UXP port. For instance, if you choose Contact Closure inputs, then all expansions most be a contact closure input. It is not possible to mix expansion types on the UXP port. Also note that UXP controllers do not support any of the AD8 features mentioned above, including the AD8 activator features.