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Installing DC Power Entry Modules
The C7008/C300 has eight supply slots at the front-bottom of the chassis
either AC Power Supplies (PSUs) or DC Power Entry Modules (PEMs). Dell Networking does not
support the use of a combination of AC and DC.
• If you select DC, the C7008/C300 requires at least one DC PEM for operation, but Dell Networking
recommends a one-plus-one redundancy configuration. Those DC PEMs are inserted in slots 0 and 7.
• To protect against high-voltage shock, install a supply blank on all unused supply slots.
NOTE: The C7008/C300 DC Power Entry Module does not support PoE or PoE+ line cards.
NOTE: Some C7008/C300 chassis may require Dell Networking assistance when using some DC power
supplies. Please contact the Dell Networking TAC if you experience any difficulty during installation.
Recommended Normal Operating Conditions
Table 8-1. Input voltage
Input Ranges
-44V (minimum)
-48V (typical)
-55V (maximum)
Table 8-2. Operating Ranges
Ambient Temperature
Operating Range
Storage Range
Humidity
Operating Range
Storage Range
Redundancy
For full facility redundancy, install two DC PEMs. Each PEM must be attached to an independent source
with a dedicated circuit breaker sized in accordance with your local building and electrical safety codes.
Cable and Connector Requirements
You must provide your own cables to connect to a remote source (a circuit breaker panel, for example) in
your equipment rack or facility. Cables must be sized to meet the following criteria:
-5° C to +40° C
-40° C to +70 ° C
5-85% RH
5-90% RH
(Figure
Maximum
1408 watts
1536 watts
1760 watts
Installing DC Power Entry Modules
8
8-2). The slots accept
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