Dell PowerEdge 4350 Dell PowerEdge 4350 Systems Service Manual - Page 20

connected to the PSPB and to their corresponding system loads the system

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1-12
Dell PowerEdge 4350 Systems Service Manual
The power supplies can operate from an AC power source of90 to 265 VAC at
47 to 63 Hz. They provide the DC operating voltages and currents listed in
Table 1-2.
NOTE: The power supplies produce DC voltages only under their loaded
condition. Therefore, when you measure these voltages, the
power supplies
must be connected to the PSPB, and the DC power cable harnesses must be
connected to the PSPB and to their corresponding system loads (the system
board, SCSI backplane board, and so forth).
.
363%
The PSPB receives input from the AC power source and distributes it to the
power supplies. The power supplies return DC power to the PSPB, which in
turn distributes redundant DC power to the system board, SCSI backplane, fan
assembly, and external drive bays. Through embedded server management
(ESM), the PSPB can also be used to perform such tasks as detecting the
presence of one to three power supplies; monitoring voltage and current
outputs from the power supplies; voltage going to the system board and fan
RPMs; and supporting the SMB_ALERT protocol used by the server manage-
ment bus (SMB).
The PSPB sits under the power supplies, which automaticallyconnect to the
PSPB when they are installed. For information on removing and replacing the
PSPB, see ±Power-Supply Paralleling Board² in Chapter 4.
Figure 1-9 shows the PSPB power connector layout; Table 1-
3 shows the cable
connections made from the PSPB.
7DEOH±²´µ³±±’&±9ROWDJH±DQG±&XUUHQW±5DQJHV±SHU±3RZHU±6XSSO\
9ROWDJH
5DQJH
0D[LPXP²2XWSXW²&XUUHQW
1
+3.3 VDC
+3.23 to +3.46 VDC
18.0 A
+5 VDC
+4.90 to +5.25 VDC
38.0 A
+12 VDC
+11.40 to +12.60 VDC
9.0 A
´12 VDC
´10.80 to ´13.20 VDC
0.5
2
A
´5 VDC
´4.50 to ´5.50 VDC
0.3
2
A
+5 VFP
+4.85 to +5.35 VDC
0.4 A
1
Maximum continuous combined load on +5 VDC and +3.3 VDC outputs cannot exceed
240 W.
2
Maximum combined load current on ²5 VDC and ²12 VDC outputs cannot exceed
0.6 A.