The XBDM is a maintenance bypass module that lets you manually transfer critical loads from UPS power to utility power using a bypass switch, enabling UPS repair or replacement without power interruption to the load. With the compact parallel switch panel, users can set up a parallel system without needing to restructure an existing low-voltage main distribution system. Incorporating a maintenance bypass alongside a UPS is an easy way to increase the reliability of your backup power system., servers, equipment) to be powered directly from the utility source, bypassing the UPS's inverter and battery circuitry. It is a common characteristic of an Online UPS.