USB Ports
Two USB 3.0 ports can be accessed from the rear of the server and two USB 2.0 ports from the front. See the location of the USB ports at Front Panel Components (Installation) and Rear Panel Components (Installation). The USB ports support hot-plugging. You can connect and disconnect USB cables and peripheral devices while the server is running, without affecting server operations.
Each USB port supplies 5V output at 500 mA.
Note - You can connect up to 126 devices to each of the four USB controllers (two ports in front, two ports in the rear), for a total of 504 USB devices per server.
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