Ac Power Supply Installation - Dell Networking S4048 Installation Manual

The PSUs have an integrated fan, which you cannot replace individually; if the fans integrated in a PSU fails, you must replace the entire
PSU. You can replace the fan trays individually. For fan tray replacement procedures, refer to Fans.
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.
NOTE: To comply with the GR-1089 Lightning Criteria for Equipment Interfacing with AC Power Ports, use an external surge
protection device (SPD) at the AC input of the router.

AC power supply installation

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 S4048–
ON chassis.
NOTE: Ensure that you correctly install the PSU. When you install the PSU correctly, the power connector is on the right side of
the PSU.
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
recommends installing the power supply in the first slot (PSU1) and installing a blank plate in the second slot (PSU2).
1 Remove the PSU slot cover from the S4048-ON.
2 Remove the PSU from the electro-static bag.
3 Insert the PSU into the switch PSU slot. Insert the PSU exposed PCB edge connector first.
The PSU slot is keyed so that the PSU can only be fully inserted in one orientation.
Figure 13. PSU installation
a PSU
26 Power supplies