Dc Requirements; Redundancy; Cable And Connector Requirements - Dell Force10 E300 Installing And Maintaining

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Figure 5-2. DC PEM Locations

Air Filter

DC Requirements

Maximum Power Dissipation

Maximum DC PEM Input Current

For full facility redundancy, install two DC PEMs where each PEM must be attached to an independent

power source with a dedicated circuit breaker sized in accordance with your local building and electrical

safety codes.

You must provide your own cables to connect to a remote power source (a circuit breaker panel, for

example) in your equipment rack or facility. Cables must be sized to meet the following criteria:

• Rated for 60A service to allow for a fully loaded E300 system per NEC in the United States or

internationally, per local safety codes.

• Limit voltage drop across the cable length to 0.5V or less.

Before you make the cable connections, apply a coat of anti-oxidant paste to unplated metal contact

surfaces. File unplated connectors, braided straps, and bus bars to a shiny finish. It is not necessary to file

and coat tinned, solder-plated, or silver-plated connectors or other plated connection surfaces, such as

those on the PEM studs.

NOTE: Please take precautions against over-tightening the screws or nuts on this device.

DC Power Supply

Slot 0

DC Power Supply

Slot 1

fn00121cHH

Optional Grounding

Holes

2400W

60A

Installing Power Modules

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