Figure 4: DB9 Connector
USB 2.0 Connector
There are four USB 2.0 connectors, as Figure 5 shows. Each can
provide 500mA of current.
Figure 5: USB 2.0 Connector
USB 3.0 Connector
And one USB 3.0 connector, as shown in Figure.
Figure 6: USB 3.0 Connector
USB Type-C