QNAP TS-h3087XU-RP - Hot-Swapping Redundant Power Supplies

c. Tighten the screws.
10. Connect all cables and external attachments.
11. Connect the power cords to the electrical outlet.
12. Power on the device.
Hot-swapping Redundant Power Supplies
NAS devices with redundant power supply units (PSUs) support hot-swapping.
Warning
Electric shock hazard.
TS-h3087XU-RP User Guide
Installation and Conguration 31