Universal Serial Bus (USB) to RS232 Converter - Managing a UPS through USB is easy with the MINUTEMAN USB to RS232 Serial Converter. Just connect the 9-pin serial converter to the port on your MINUTEMAN? UPS, then connect the USB cable to a PC. Once connected, the UPS can be monitored and managed using SentryII power management and diagnostic software without using a serial port on the PC. This simple converter affords the convenience of USB management to users of both current and legacy model MINUTEMAN? UPS systems.