Important Points To Remember; Installing Ac Power Supplies - Dell S4048 Getting Started Manual

Figure 7. Attach the Ground Cable
3. Attach the other end of the ground cable to a suitable ground point.

Important Points to Remember

The S4048–ON is designed to support two hot-swappable power supplies with integrated fans that
provide cooling for the chassis.
• The S4048–ON ships with one AC power supply. Dell recommends purchasing a second power
supply.
• The PSU slides into the slot smoothly. Do not force the PSU into a slot as this action may damage the
PSU or the S4048-ON chassis.
• The S4048–ON supports AC power supplies with two air-flow directions (I/O to Utility and Utility to
I/O). The S4048–ON does not support mixing PSU types. The fan airflow direction for the PSUs must
be the same.
CAUTION: DO NOT mix airflow directions. Both power supplies must use the same airflow
direction (I/O to Utility or Utility to I/O).
WARNING: Although the switch can run on one PSU, Dell Networking highly recommends using
two PSUs for full redundancy and additional cooling. To avoid overheating when the switch is
running with only a single PSU, Dell Networking recommends using PSU1 (on the left) and
covering the second PSU slot opening (PSU2) with a blank plate.
WARNING: 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.
WARNING: To prevent electrical shock, ensure that the S4048–ON is grounded properly. If you
ground your equipment incorrectly, excessive emissions may result. To ensure that the power
cables meet your local electrical requirements, use a qualified electrician.
NOTE: The Utility panel consists of two slots, PSU1 and PSU2. If you are using more than one PSU,
insert the PSUs in either slot.

Installing AC Power Supplies

1. Remove the PSU from the electro-static bag.
2. Remove the PSU slot cover from the S4048-ON.
3. Use the grab handle to slide the PSU into the switch PSU slot. The PSU slot is keyed such that the
PSU can only be fully inserted in one orientation.
12
Install the Hardware