Specifications

Current Usage
121
Worksheet, Calculating DC Power Usage
1. Listthe currentfor eachboard and devicein theappropriatevoltage levelcolumn of
Table A-2.
2. Add the currents in each column. Then go to the next worksheet.
Table A-2 Power Usage Worksheet
Device, by Current (maximum)
at voltage level:
+3.3 V +5 V –5 V +12 V –12 V
Boards, processors, and memory (get
totals from your board manual)
SCSI backplane
Front panel board
3.5-inch diskette drive 0.3 A
CD-ROM drive 0.4 A 1.0 A
Second 5.25-inch device
1st hot-swap hard drive
2nd hot-swap hard drive
3rd hot-swap hard drive
4th hot-swap hard drive
5th hot-swap hard drive
Cooling fan 1, 120 mm 0.6 A
Cooling fan 2, 120 mm 0.6 A
Cooling fan 3, 120 mm 0.6 A
Total Current