3Com NETBuilder II, Installing Instruction, Page: 69 / 82

Specifications A-3
To determine the total load on the 4-Slot chassis power supply, add the
maximum current consumption of the floppy disk drive, the main processor
module, and each installed I/O module. For the maximum current consumption
of the main processor module and each installed I/O module, refer to each
installation guide.
8-Slot Chassis Table A-10, Table A-11, and Table A-12 provide a physical description and
electrical and environmental requirements for the 8-Slot chassis. Table A-13 lists
the maximum current consumption for the floppy disk drive.
* With ejector handles in closed position and without cable strain-relief bracket installed.
† Weight includes installed CEC module and eight I/O modules.
®
NETBuilder II
Table A-6 Physical Description of the 8-Slot Chassis
Length
*
Width Height Weight
†
18.5 in 17.4 in 7.3 in 50 lbs
47.0 cm 44.2 cm 18.5 cm 22.7 kg
Table A-7 Electrical Requirements for the 8-Slot Chassis
Parameter Requirement
Input voltage 115/230 VAC 47 to 63 Hz
Input voltage ranges 90 to 132 VAC or
180 to 264 VAC Either range accepted without user switching
Maximum current
consumption 3.25 A @ 115 VAC
1.62 A @ 230 VAC
Fuse: 6.3 A, 250 V, fast-blow, 5 mm x 20 mm
Input power 374 W
Power dissipation 204 W
Heat dissipation 1,276 BTU/hr
Table A-8 Environmental Requirements for the 8-Slot Chassis
Requirement
Parameter Minimum Maximum
Temperature:
Operating 41˚F (5˚C) 104˚F (40˚C)
Nonoperating –4˚F (–20˚C) 140˚F (60˚C)
Altitude:
Operating Sea level 15, 000 ft. (4,572 m)
Nonoperating Sea level 40,000 ft. at 32˚F (12,191 m at 0˚C)
Relative Humidity:
Operating 20% noncondensing 80% noncondensing
Nonoperating 10% noncondensing 90% noncondensing
Table A-9 Maximum Current Consumption of the 8-Slot Chassis Floppy Disk Drive
+5 Volts –5 Volts +12 Volts –12 Volts
0.92 A 0.0 A 0.0 A 0.0 A