The UPort driver does not restrict the number of devices that can be connected to a computer or notebook. In a Windows system, the number of connected devices is restricted by the USB specification, which limits the number of device addresses to a maximum of 127 USB devices. The maximum number of devices you can connect depends on the configuration of your system. In addition, power requirements of the devices connected are an important consideration to keep in mind. As the number of connected devices grow, it is necessary to calculate if each device will receive the appropriate amount of power.
The recommended maximum number of UPort converters connected to one host computer is 4. Connecting more than 4 UPort converters to one host computer or notebook could overload the system resources and potentially destabilize the system.