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Power Select Jumper
CG9103-2RS232-1USB can be powered either from its on-board power supply, or from CloudGate 3.4V.
Figure 2 shows how Jumper X1 is used to switch between these two options:
Figure 2
RS232 Power Jumpers
When installed, jumper X6 co5V power supply to Pin #4 (DTR) of RS232-0 connector.
When installed, jumper X7 co5V power supply to Pin #4 (DTR) of RS232-1 connector.
Internal Power Supply
Power supply from CloudGate 3.4V