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26 PowerConnect B-FCX Switch Hardware Installation Guide
53-1002267-01
Installing and replacing a power supply unit
2
FIGURE 26 Serial Port (DB-9 DTE) Pin-Out
Most PC serial ports also require a cable with a female DB-9 connector. Terminal connections will
vary, requiring either a DB-9 or DB-25 connector, male or female. Serial cable options between a
Dell device and a PC or terminal are shown in Table 16.
Wiring map for serial cable
NOTE
As indicated in Table 16, some of the wires should not be connected.
Installing and replacing a power supply unit
CAUTION
For the PowerConnect B-FCX624 and PowerConnect B-FCX648 devices,be sure that the airflow
direction of the power supply unit matches that of the installed fan tray. The power supplies and
fan trays are clearly labeled with either a green arrow with an “E”, or an orange arrow with an “I”
as shown in Table 1 on page 3.
TABLE 16 Serial cable wiring
Switch 9-Pin Serial Port Null Modem PC 9-Pin DTE Port
2 TXD (transmit data) ----------------------------> 2 RXD (receive data)
3 RXD (receive data) <---------------------------- 3 TXD (transmit data)
5 SGND (signal ground) <--------------------------> 5 SGND (signal
ground)
No other pins are used.
6 9
15