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Cisco UCS C220 M4 NEBS Server Service Note
Features Specific to the Cisco UCS C220 M4 NEBS Server
NEBS Compliance
The Cisco UCS C220 M4 NEBS Server has been certified for the following levels of NEBS compliance:
• The DC-power version of the server is certified for NEBS Level 3 compliance.
• The AC-power version of the server is certified for NEBS Level 1 compliance.
Power Supplies
The Cisco UCS C220 M4 NEBS server can use either AC or DC power supplies.
770 W AC Power Supply
The NEBS server can use one or two 770 W AC power supplies (Cisco PID UCSC-PSU1-770W=).
• The server is certified for NEBS Level 1 compliance when using this AC power supply.
• These power supplies are hot-swappable with 1+1 redundancy when two power supplies are present.
• See Power Supply Specifications, page 5, for information about these power supplies.
• See the Cisco UCS C220 M4 Server Installation and Service Guide, Chapter 3, for information about
replacing a power supply.
1050 W DC Power Supply
The NEBS server can use one or two 1050 W, –48 VDC power supplies (Cisco PID
UCSC-PSUV2-1050DC=).
• The server is certified for NEBS Level 3 compliance when using this DC power supply.
• These power supplies are hot-swappable with 1+1 redundancy when two power supplies are present.
• See Power Supply Specifications, page 5, for information about these power supplies.
Installation Grounding
The 770 W AC power supplies have internal grounding and so no additional grounding is required when
the supported AC power cords are used.
When using the 1050 W DC power supply, additional grounding of the server chassis to the earth ground
of the rack is available. A single screw hole for use with your grounding lug and grounding wire is
supplied on the chassis rear panel.
Note You must provide your own screw with lock-washer, grounding lug, and grounding wire. The
recommended lug is Panduit LCD10-14AF-L or equivalent. The grounding point on the chassis is sized
for a single #10-32 screw. A lock-washer is required to secure the lug to the chassis. The grounding lug
must fit a #10-32 screw and 14 AWG wire. The grounding cable that you provide must be 14 AWG
(2 mm), minimum 60° C wire, or as permitted by the local code.
See Figure 1-1 for the location of the grounding lug screw-hole on the chassis rear panel.
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