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Figure 17. PSU installation

Left PSU is PSU1 and right PSU is PSU2.

Plug in the appropriate AC 3-prongs cord from the switch PSU to the external power source.

Repeat steps 1 through 4 if you have a redundant PSU slot.

NOTE:

The switch powers up when you connect the cables between the power supply and the power source.

AC or DC 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 S4100–

ON Series switch.

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. Install a blank plate in the second slot, PSU2.

Disconnect the power cable from the PSU.

Use the grab handle to slide the PSU out of the power supply bay.

Use the grab handle on the replacement PSU to slide it into the power supply bay.

Attach the power cord to the replacement PSU.

NOTE:

The switch powers up when the cables are connected between the power supply and the power source.

Each DC PSU kit, sold separately, comes with a connector cable.

Dell EMC

support.

Power supplies