Terminal block option is available with AAON equipment to allow simple thermostat or field installed DDC controller to operate the equipment. Factory installed customer provided controls is a feature available from AAON that allows the customer to specify the type and manufacturer of the controller to be used in the AAON equipment. The AAON sales representative and AAON Applications personnel will review specific control requirements to verify that the controller selected is capable of providing all inputs and outputs required to operate the equipment.