An access means for providing access to components within a stationary housing arrangement of an electrical machine with a stationary part and a rotatable part includes an arrangement of permanent fixtures arranged on the stationary housing arrangement of the electrical machine. The back frame includes primary assembling pieces, secondary assembling pieces, and a bracing piece for fixing a circuit board. Fluid flow inlets are provided in the lower section of the body below the blade openings and flow outlets are provided in an upper section above the blade openings. The one or more power supplies are further configured to output the DC power to a DC power bus of the device rack. The controller generates a next command but transfers the next command to the nonvolatile memory device in response to the readybusy signal and the idle verse busy state of a target plane among multiple planes of the nonvolatile memory device.