C Powered Serial Ports
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.
Figure C-1 Powered Serial Ports
Item Description Supports
+5V
+9V +12V
1 COM 1 (yellow) Yes Yes Yes
2 COM 2 (teal) Yes No Yes
3 COM 3 (teal) (some models) Yes No Yes
4 COM 4 (teal) (some models) Yes No Yes
ENWW 45