Stratus ftServer 2510, Site Planning Manual

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Sample PDU Usage Calculation
5-4 Stratus ftServer 2510, 4410, and 6210 Systems: Site Planning Guide (R627)
Sample PDU Usage Calculation
Table 5-3 shows how to use the information from Table 5-1 to calculate the required
rack space and the current when the PDU is connected to a NEMA L6-20R receptacle
in the United States, with a power voltage of 208V.
Table 5-4 and the explanation which follows show how to use the information from
Table 5-3 to determine when you need to buy an additional pair of PDUs or calculate
the size and number of cabinets you need.
Table 5-3. Sample: Current and Rack-Space Requirements
Component Watts Current (A) Rack Space
ftServer system 650 3.91 4U
1U LCD monitor unit 54 0.12 1U
EC-SL1AA-YF tape drive enclosure 80 0.48 2U
ftScalable Storage system 400 2.40 2U
Table 5-4. Sample: Calculating A-Side PDU and Rack-Space Requirements
1. Component
2. Cumulative
Space Used (U)
3. Cumulative
Number of
A-Side Outlets
4. Cumulative
Current (A)
PDU pair 2 0 0.00
ftServer system 6 1 3.91
1U LCD monitor unit 7 2 4.23
Tape drive enclosure 9 3 4.71
ftScalable Storage system 11 4 7.12
ftServer system 15 5 11.02
ftServer system 19 6 14.93
PDU pair 21 0 0
ftServer system 25 1 3.91