U

The standard unit of measure for rack-mounted equipment. Equal to 1.75 inches in height per U. A device measuring 1U is 1.75 inches high. A device measuring 2U is 3.50 inches high.

USB Connectivity

Enables full integration with built-in power management and auto shutdown features of Windows, Linux, and Mac OS X.

USB Port

Provides connectivity for data transfer between computers and devices. Charges personal electronics, including Smartphones, MP3 players, digital cameras, and other devices.

USB (HID Compliant)

Universal Serial Bus devices are used to connect various components to a computer. A HID (Human Interface Device) compliant USB follows a specific protocol for communication that allows it to be used with virtually any system.

USB & Serial Connectivity

Enables full integration with built-in power management and auto shutdown features on Windows, Linux, and VMware systems through a HID-compliant USB port and Serial port.

Upgradeable Firmware

Downloadable improvements (firmware updates) to programs that run the PDU. For RMCARDS, upgradable firmware provides instructions for up-to-date system management.

Under Voltage

Occurs when voltage is lower than normal for an extended period of time without recovering, but not so low that the electronic device will not function. Two types of undervoltages are brownouts and sags. (Also known as under-voltage and undervoltage.)

UL Standards

Are set by Underwriters Laboratories (UL). CyberPower UPS systems are certified according to UL standards and meet strict testing requirements.