Hardware Reference Guide HP rp5800

Installing a Powered Serial Port Expansion Card
Two powered serial ports, COM 1 and COM 2, are standard on the computer. Some models have a
powered serial port expansion card installed that supplies two additional powered serial ports, COM 3
and COM 4. If your computer is not configured with a powered serial port expansion card, you may
purchase one from HP.
Figure 2-21 Powered Serial Ports
Table 2-5 Powered Serial Ports
Item Description Supports
+5V +12V
1COM 1 Yes Yes
2COM 2 Yes Yes
3 COM 3 (optional) Yes Yes
4 COM 4 (optional) Yes Yes
NOTE: The powered serial ports are configured for power in the
Computer Setup utility. Refer to
Configuring Powered Serial Ports
on page 30 for more information.
If the powered serial ports have been configured for power from the factory, they will be covered by
protective plastic caps. Turn off the computer and remove the caps before connecting powered serial
devices.
ENWW Installing a Full-Height Expansion Card 25