APC Smart-UPS 1000VA USB & Serial RM 1U 120V. Description: APC Smart-UPS 1000VA/640W Input 120V/Output 120V Interface Port DB-9 RS-232 SmartSlot USB Rack Height 1 U. Includes: CD with software Rack Mounting support rails Smart UPS signalling RS-232 cable USB cable User Manual. Topology: Line Interactive.