Power Supplies; Components - Dell Force10 S4810P Manual

Power Supplies

The S4820T supports two hot-swappable power supplies units (PSUs) with integrated fans that provide
cooling for the system. The S4820T supports AC power supplies with two air-flow directions (normal
and reversed). Two PSUs are required for full redundancy, but the system will operate with a single PSU.
NOTE: If you use a single PSU, you must install a blank plate in the other PSU slot. Dell Force10
recommends using power supply 1 (PSU1) as the blank plate slot.
The PSUs are field replaceable. When running with full redundancy (two power supplies installed and
running), you can remove and replace one PSU without disrupting traffic.
The S4820T does not support mixing PSU types. You cannot replace an AC PSU with a DC PSU and you
cannot replace an AC-R PSU with a DC-R PSU.
WARNING: Electrostatic discharge (ESD) damage can occur if components are mishandled. Always wear an
ESD-preventive wrist or heel ground strap when handling the S4820T and its components.
CAUTION: To prevent electrical shock, ensure the S4820T is grounded properly. If you do not ground your
equipment correctly, excessive emissions may result. Use a qualified electrician to ensure the power cables
meet your local electrical requirements.

Components

The following power supply options are available for the S4820T:
• AC power supply with integrated fan
• AC power supply with integrated reverse flow fan
• DC power supply with integrated fan
• DC power supply with integrated reverse flow fan
Power supply 0 (PSU0) is on the left side of the chassis; power supply 1 (PSU1) is on the right side of the
chassis.
Figure 5-1. S4820T with One AC PSU
Power Supply 0
5
Power Supply 1 Port
Power Supplies | 39