Which the voltage of the entrance of energy of the adapter for the PORTS/16EM?

The Ports/16em module draws its power from the computer’s bus via the EBI cable. Due to this fact, the EBI cable should never be connected/disconnected without the computer being powered down first, or damage may occur to computer, Ports module, or both.

An auxillary power supply is typically not necessary until the third or fourth module in a chain of Ports modules.