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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 2-25
Table 2-5
Powered Serial Ports
Item
Description
1
COM 1
2
COM 2
3
COM 3 (optional)
4
COM 4 (optional)
NOTE:
The powered serial ports are configured for power in the
Computer Setup utility. Refer to
on page 32
To install a Powered Serial Port expansion card:
1.
Remove/disengage any security devices that prohibit opening the computer.
2.
Remove all removable media, such as optical discs or USB flash drives, from the computer.
3.
Turn off the computer properly through the operating system, then turn off any external devices.
4.
Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION:
as long as the system is plugged into an active AC outlet. You must disconnect the power cord
to avoid damage to the internal components of the computer.
28
Chapter 2 Hardware Upgrades
Powered Serial Ports
Configuring Powered Serial Ports
for more information.
Regardless of the power-on state, voltage is always present on the system board
Supports
+5V
+12V
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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