Configuring Power to a Serial Port
The serial ports on the HP Point of Sale System computer can be configured as standard (non-powered)
serial ports or powered serial ports. Some Point of Sale devices use a powered serial port. If the serial
port is configured as a powered port, devices that support a powered serial interface do not require an
external power source.
NOTE: The computer ships with all serial ports configured in standard serial mode.
Power to the ports can be configured by moving jumpers and serial port jumper wires on the serial port
headers. The computer ships with a jumper on each serial port header. Jumper wires are available as
an option from HP or an authorized HP provider.
Figure C-3 Serial Port Jumper Wire
The serial port jumpers on the system board are located as shown in the following illustration:
Figure C-4 Serial Port Jumper Locations on the System Board
Item Jumper Port Name
1 P16 COM 1
2 P127 COM 1
3P17 COM 2
The serial port jumpers on the powered serial port expansion card are located as shown in the following
illustration:
Figure C-5 Powered Serial Port Expansion Card Jumper Locations
ENWW Configuring Power to a Serial Port 47
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