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Figure 17. PSU installation
1
PSU
When you install the PSU correctly, it snaps into place and is flushed with the back of the switch.
4
Plug in the appropriate three-pronged AC cord from the switch PSU to the external power source.
5
If you have a redundant PSU, a second PSU, repeat steps 1 through 4 using the second PSU slot.
NOTE:
The S4048T-ON powers up when you connect the cables between the power supply and the power source.
AC power supply replacement
CAUTION:
Disconnect the power cord before removing the power supplies. Also, disconnect all power cords before servicing.
NOTE:
The PSU slides into the slot smoothly. Do not force a PSU into a slot as this action may damage the PSU or the S4048T–
ON chassis.
NOTE:
If a PSU fails, you must replace the entire unit. There are no field serviceable components in the PSU. To request a
hardware replacement, see
NOTE:
If you use a single PSU, install a blank plate in the other PSU slot. If you are only using one power supply, Dell EMC
recommends installing the power supply in the first slot, PSU1, and installing a blank plate in the second slot, PSU2.
1
Disconnect the power cable from the PSU.
2
Use the grab handle to slide the PSU out of the power supply bay.
3
Use the grab handle on the replacement PSU to slide it into the power supply bay.
4
Attach the power cord to the replacement PSU.
NOTE:
The system powers up when you connect the cables between the power supply and the power source.
DC power supply connection
Each DC PSU kit, sold separately, comes with a connector cable.
32
Power supplies
Dell
Support.
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