Dell Force10 S4820T System Getting Started Manual - Page 18

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Power Supplies

The S4820T supports two hot-swappable power supplies units (PSUs) and fans

that provide cooling for the system. The S4820T supports AC and DC power

supplies with two air-flow directions (I/O to PSU and PSU to I/O). 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 while the

other PSU is running 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.

Figure 1-4. S4820T Power Supply

PS0

Installation

PS1