Dell Force10 S55 Manual - Page 38

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DC Power Requirements

Parameter

Nominal Input Voltage

Maximum Power Supply Input Current

Maximum System Power Input

The S55 complies with the following IEEE standards:

• 802.3ae 10 Gigabit Ethernet

• 802.3ab 1000Base-T

• 802.1p L2 Prioritization

• 802.1Q VLAN Tagging, Double VLAN Tagging (Q in Q), GVRP

• 802.1s Multiple Spanning Tree Protocol

• 802.1w Rapid Spanning Tree Protocol

• 802.3ad Link Aggregation with LACP

• 802.1D Bridging, GARP, GMRP

• 802.3x Flow Control

• 802.1ac Frame Extension for VLAN tagging

• 802.1x Port based Network Access Control

The S55 is designed to comply with the following safety and agency requirements.

• Shielded cables must be used for ports 0 - 43.The shields must be grounded at both ends.

• Only reverse air flow configurations may be used in a NEBS compliant installation. Use only AC

supply S55-PWR-AC-R, DC supply S55-PWR-DC-R and Fan Only S55-FAN-R, Systems S55-44T-

AC-R and S55-44T-DC-R.

• Power supplies and fan modules must be fitted with the S55-PWR-FLTR kits. Fan filters must be

replaced on a regular basis.

• This equipment is intended to be used with an external second-level 6kV lightning SPD (Surge

Protective Device) at the AC input of the building.

• For the NEBS compliant installation, AC power connections shall use a SPD (surge protection device)

in order to protect the AC power supplies from damage to excessive power line surges.

S55 Specifications

Specifications

-43 to -72 VDC at startup

-36 to -72 VDC during normal operation

10 A

135 W