Dell PowerSwitch S4048-ON Installation Guide February 2024

DC power supply installation

CAUTION:To prevent electrical shock, ensure that the S4048-ON is grounded properly. If you do not ground your equipment correctly, excessive emissions may result. Use a qualified electrician to ensure that the power cables meet your local electrical requirements.

WARNING:The switch must have either AC power supplies or DC power supplies. You cannot mix power supplies.

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:If you use a single PSU, install a blank plate in the other PSU slot. If you are only using one power supply, Dell Technologies recommends installing the power supply in the first slot (PSU1) and installing a blank plate in the second slot (PSU2).

NOTE:ESD damage can occur if components are mishandled. Always wear an ESD-preventive wrist or heel ground strap when handling the S4048–ON and its components.

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, contact Technical Support at www.dell.com/support.

1. Power supply 1
2. Power supply 2

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 inserts fully in one orientation only.

   

   1. Orange release tab
   2. DC PSU

   When you install the PSU correctly, it snaps into place and is flushed with the back of the switch.
4. Plug in the DC power cable 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 on the S4048-ON switch.
6. Attach the DC power label. See Attaching the DC Label.