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 7-31 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
86 Chapter 7 Removal and Replacement Procedures — Small Form Factor (SFF) Chassis ENWW
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