Dell S4810 Installing Manual page 34

Figure 5-1. AC Power Supply
Figure 5-2. DC Power Supply
Power supply 0 (PSU0) is on the left side of the chassis; power supply 1 (PSU1) is on the right side of the
chassis.
The PSUs in the S4810 are field replaceable. When both power supplies are installed and running, you
can remove one power supply without interrupting traffic.
The PSUs are in a single piece with the PSU fans. You can replace the fan trays individually, but you
cannot replace the fans that are attached to the PSUs—if the fans attached to the PSU fail, you must
replace the entire PSU. For fan tray replacement procedures, refer to
WARNING: Prevent exposure and contact with hazardous voltages. Do not attempt to operate this system
.
with the safety cover removed.
CAUTION: Remove the power cable from the PSU prior to removing the PSU. Also, do not connect the
.
power cable before you insert the PSU in the chassis.
CAUTION: The DC PSU comes with a 6-8 inch power cord with a snap-in plug that attaches to the DC power
.
supply and screw terminals that attach to the main power. To ensure sufficient room, Dell Force10
recommends using a longer cable.
CAUTION: The power supply is marked + 48V -. Connect the + (plus sign) to the red cable on the 6-8 inch
.
cord; connect the - (minus sign) to the black cable on the 6-8 inch cord. BE SURE TO connect the RED cable
to RETURN and the BLACK cable to -48V.
34 | Power Supplies
PSU0
PSU0
Fan Modules
Cable
Connector
Fan Modules
Cable
Connector
PSU1
Grab Handle
PSU1
Grab Handle
Chapter 6, Fans.