In this video, we take a close look at the Bently Nevada 3500/15 Universal AC Power Input Module, part number 106M1081-01. You'll see exactly where this half-height PIM sits behind the Universal AC Power Supply in a 3500 Series rack, how the 3500/15-05-05-00 configuration pairs two supplies with two PIMs for primary and backup power, and what the input characteristics mean in practice. We also walk through the common signs that a PIM needs replacement—such as an open input fuse after an over-voltage event or a damaged input connector—and explain why keeping a spare on site supports fast hot-swaps while the second supply keeps the rack online. Ideal for maintenance and reliability teams working with turbines, compressors, and large motor trains.