Specifications

Installing DC Power Entry Modules | 33
8
Installing DC Power Entry Modules
The C300 has eight supply slots at the front-bottom of the chassis ( Figure 8-2 on page 35 ). The slots
accept either AC Power Supplies (PSUs) or DC Power Entry Modules (PEMs). Dell Force10 does not
support the use of a combination of AC and DC.
• If you select DC, the C300 requires at least one DC PEM for operation, but Dell Force10 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 (CC-C-BLNK-PWR) on all unused supply
slots.
NOTE: The C300 DC Power Entry Module does not support PoE line cards.
NOTE: Some CH-C300 chassis may require Dell Force10 assistance when using some DC power supplies.
Please contact the Dell Force10 TAC if you experience any difficulty during installation.
Recommended Normal Operating Conditions
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.
Table 8-1. Input voltage
Input Ranges Maximum
-44V (minimum) 1408 watts
-48V (typical) 1536 watts
-55V (maximum) 1760 watts
Table 8-2. Operating Ranges
Ambient Temperature
Operating Range -5° C to +40° C
Storage Range -40° C to +70 ° C
Humidity
Operating Range 5-85% RH
Storage Range 5-90% RH